summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/luatex/lualibs/lualibs-extended-merged.lua
blob: ceecbf301323d350948261df1a0a768a6a1c5ff0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
-- merged file : lualibs-extended-merged.lua
-- parent file : lualibs-extended.lua
-- merge date  : 2023-07-13 12:55

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-sac']={
 version=1.001,
 optimize=true,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local byte,sub=string.byte,string.sub
local tonumber=tonumber
utilities=utilities or {}
local streams={}
utilities.streams=streams
function streams.open(filename,zerobased)
 local f=filename and io.loaddata(filename)
 if f then
  return { f,1,#f,zerobased or false }
 end
end
function streams.openstring(f,zerobased)
 if f then
  return { f,1,#f,zerobased or false }
 end
end
function streams.getstring(f)
 if f then
  return f[1]
 end
end
function streams.close()
end
function streams.size(f)
 return f and f[3] or 0
end
streams.getsize=streams.size
function streams.setposition(f,i)
 if f[4] then
  if i<=0 then
   f[2]=1
  else
   f[2]=i+1
  end
 else
  if i<=1 then
   f[2]=1
  else
   f[2]=i
  end
 end
end
function streams.getposition(f)
 if f[4] then
  return f[2]-1
 else
  return f[2]
 end
end
function streams.look(f,n,chars)
 local b=f[2]
 local e=b+n-1
 if chars then
  return sub(f[1],b,e)
 else
  return byte(f[1],b,e)
 end
end
function streams.skip(f,n)
 f[2]=f[2]+n
end
function streams.readbyte(f)
 local i=f[2]
 f[2]=i+1
 return byte(f[1],i)
end
function streams.readbytes(f,n)
 local i=f[2]
 local j=i+n
 f[2]=j
 return byte(f[1],i,j-1)
end
function streams.readbytetable(f,n)
 local i=f[2]
 local j=i+n
 f[2]=j
 return { byte(f[1],i,j-1) }
end
function streams.skipbytes(f,n)
 f[2]=f[2]+n
end
function streams.readchar(f)
 local i=f[2]
 f[2]=i+1
 return sub(f[1],i,i)
end
function streams.readstring(f,n)
 local i=f[2]
 local j=i+n
 f[2]=j
 return sub(f[1],i,j-1)
end
function streams.readinteger1(f)  
 local i=f[2]
 f[2]=i+1
 local n=byte(f[1],i)
 if n>=0x80 then
  return n-0x100
 else
  return n
 end
end
streams.readcardinal1=streams.readbyte  
streams.readcardinal=streams.readcardinal1
streams.readinteger=streams.readinteger1
function streams.readcardinal2(f)
 local i=f[2]
 local j=i+1
 f[2]=j+1
 local a,b=byte(f[1],i,j)
 return 0x100*a+b
end
function streams.readcardinal2le(f)
 local i=f[2]
 local j=i+1
 f[2]=j+1
 local b,a=byte(f[1],i,j)
 return 0x100*a+b
end
function streams.readinteger2(f)
 local i=f[2]
 local j=i+1
 f[2]=j+1
 local a,b=byte(f[1],i,j)
 if a>=0x80 then
  return 0x100*a+b-0x10000
 else
  return 0x100*a+b
 end
end
function streams.readinteger2le(f)
 local i=f[2]
 local j=i+1
 f[2]=j+1
 local b,a=byte(f[1],i,j)
 if a>=0x80 then
  return 0x100*a+b-0x10000
 else
  return 0x100*a+b
 end
end
function streams.readcardinal3(f)
 local i=f[2]
 local j=i+2
 f[2]=j+1
 local a,b,c=byte(f[1],i,j)
 return 0x10000*a+0x100*b+c
end
function streams.readcardinal3le(f)
 local i=f[2]
 local j=i+2
 f[2]=j+1
 local c,b,a=byte(f[1],i,j)
 return 0x10000*a+0x100*b+c
end
function streams.readinteger3(f)
 local i=f[2]
 local j=i+3
 f[2]=j+1
 local a,b,c=byte(f[1],i,j)
 if a>=0x80 then
  return 0x10000*a+0x100*b+c-0x1000000
 else
  return 0x10000*a+0x100*b+c
 end
end
function streams.readinteger3le(f)
 local i=f[2]
 local j=i+3
 f[2]=j+1
 local c,b,a=byte(f[1],i,j)
 if a>=0x80 then
  return 0x10000*a+0x100*b+c-0x1000000
 else
  return 0x10000*a+0x100*b+c
 end
end
function streams.readcardinal4(f)
 local i=f[2]
 local j=i+3
 f[2]=j+1
 local a,b,c,d=byte(f[1],i,j)
 return 0x1000000*a+0x10000*b+0x100*c+d
end
function streams.readcardinal4le(f)
 local i=f[2]
 local j=i+3
 f[2]=j+1
 local d,c,b,a=byte(f[1],i,j)
 return 0x1000000*a+0x10000*b+0x100*c+d
end
function streams.readinteger4(f)
 local i=f[2]
 local j=i+3
 f[2]=j+1
 local a,b,c,d=byte(f[1],i,j)
 if a>=0x80 then
  return 0x1000000*a+0x10000*b+0x100*c+d-0x100000000
 else
  return 0x1000000*a+0x10000*b+0x100*c+d
 end
end
function streams.readinteger4le(f)
 local i=f[2]
 local j=i+3
 f[2]=j+1
 local d,c,b,a=byte(f[1],i,j)
 if a>=0x80 then
  return 0x1000000*a+0x10000*b+0x100*c+d-0x100000000
 else
  return 0x1000000*a+0x10000*b+0x100*c+d
 end
end
function streams.readfixed2(f)
 local i=f[2]
 local j=i+1
 f[2]=j+1
 local n1,n2=byte(f[1],i,j)
 if n1>=0x80 then
  n1=n1-0x100
 end
 return n1+n2/0xFF
end
function streams.readfixed4(f)
 local i=f[2]
 local j=i+3
 f[2]=j+1
 local a,b,c,d=byte(f[1],i,j)
 local n1=0x100*a+b
 local n2=0x100*c+d
 if n1>=0x8000 then
  n1=n1-0x10000
 end
 return n1+n2/0xFFFF
end
if bit32 then
 local extract=bit32.extract
 local band=bit32.band
 function streams.read2dot14(f)
  local i=f[2]
  local j=i+1
  f[2]=j+1
  local a,b=byte(f[1],i,j)
  if a>=0x80 then
   local n=-(0x100*a+b)
   return-(extract(n,14,2)+(band(n,0x3FFF)/16384.0))
  else
   local n=0x100*a+b
   return   (extract(n,14,2)+(band(n,0x3FFF)/16384.0))
  end
 end
end
function streams.skipshort(f,n)
 f[2]=f[2]+2*(n or 1)
end
function streams.skiplong(f,n)
 f[2]=f[2]+4*(n or 1)
end
if sio and sio.readcardinal2 then
 local readcardinal1=sio.readcardinal1
 local readcardinal2=sio.readcardinal2
 local readcardinal3=sio.readcardinal3
 local readcardinal4=sio.readcardinal4
 local readinteger1=sio.readinteger1
 local readinteger2=sio.readinteger2
 local readinteger3=sio.readinteger3
 local readinteger4=sio.readinteger4
 local readfixed2=sio.readfixed2
 local readfixed4=sio.readfixed4
 local read2dot14=sio.read2dot14
 local readbytes=sio.readbytes
 local readbytetable=sio.readbytetable
 function streams.readcardinal1(f)
  local i=f[2]
  f[2]=i+1
  return readcardinal1(f[1],i)
 end
 function streams.readcardinal2(f)
  local i=f[2]
  f[2]=i+2
  return readcardinal2(f[1],i)
 end
 function streams.readcardinal3(f)
  local i=f[2]
  f[2]=i+3
  return readcardinal3(f[1],i)
 end
 function streams.readcardinal4(f)
  local i=f[2]
  f[2]=i+4
  return readcardinal4(f[1],i)
 end
 function streams.readinteger1(f)
  local i=f[2]
  f[2]=i+1
  return readinteger1(f[1],i)
 end
 function streams.readinteger2(f)
  local i=f[2]
  f[2]=i+2
  return readinteger2(f[1],i)
 end
 function streams.readinteger3(f)
  local i=f[2]
  f[2]=i+3
  return readinteger3(f[1],i)
 end
 function streams.readinteger4(f)
  local i=f[2]
  f[2]=i+4
  return readinteger4(f[1],i)
 end
 function streams.readfixed2(f) 
  local i=f[2]
  f[2]=i+2
  return readfixed2(f[1],i)
 end
 function streams.readfixed4(f) 
  local i=f[2]
  f[2]=i+4
  return readfixed4(f[1],i)
 end
 function streams.read2dot14(f)
  local i=f[2]
  f[2]=i+2
  return read2dot14(f[1],i)
 end
 function streams.readbytes(f,n)
  local i=f[2]
  local s=f[3]
  local p=i+n
  if p>s then
   f[2]=s+1
  else
   f[2]=p
  end
  return readbytes(f[1],i,n)
 end
 function streams.readbytetable(f,n)
  local i=f[2]
  local s=f[3]
  local p=i+n
  if p>s then
   f[2]=s+1
  else
   f[2]=p
  end
  return readbytetable(f[1],i,n)
 end
 streams.readbyte=streams.readcardinal1
 streams.readsignedbyte=streams.readinteger1
 streams.readcardinal=streams.readcardinal1
 streams.readinteger=streams.readinteger1
end
if sio and sio.readcardinaltable then
 local readcardinaltable=sio.readcardinaltable
 local readintegertable=sio.readintegertable
 function utilities.streams.readcardinaltable(f,n,b)
  local i=f[2]
  local s=f[3]
  local p=i+n*b
  if p>s then
   f[2]=s+1
  else
   f[2]=p
  end
  return readcardinaltable(f[1],i,n,b)
 end
 function utilities.streams.readintegertable(f,n,b)
  local i=f[2]
  local s=f[3]
  local p=i+n*b
  if p>s then
   f[2]=s+1
  else
   f[2]=p
  end
  return readintegertable(f[1],i,n,b)
 end
else
 local readcardinal1=streams.readcardinal1
 local readcardinal2=streams.readcardinal2
 local readcardinal3=streams.readcardinal3
 local readcardinal4=streams.readcardinal4
 function streams.readcardinaltable(f,n,b)
  local i=f[2]
  local s=f[3]
  local p=i+n*b
  if p>s then
   f[2]=s+1
  else
   f[2]=p
  end
  local t={}
   if b==1 then for i=1,n do t[i]=readcardinal1(f[1],i) end
  elseif b==2 then for i=1,n do t[i]=readcardinal2(f[1],i) end
  elseif b==3 then for i=1,n do t[i]=readcardinal3(f[1],i) end
  elseif b==4 then for i=1,n do t[i]=readcardinal4(f[1],i) end end
  return t
 end
 local readinteger1=streams.readinteger1
 local readinteger2=streams.readinteger2
 local readinteger3=streams.readinteger3
 local readinteger4=streams.readinteger4
 function streams.readintegertable(f,n,b)
  local i=f[2]
  local s=f[3]
  local p=i+n*b
  if p>s then
   f[2]=s+1
  else
   f[2]=p
  end
  local t={}
   if b==1 then for i=1,n do t[i]=readinteger1(f[1],i) end
  elseif b==2 then for i=1,n do t[i]=readinteger2(f[1],i) end
  elseif b==3 then for i=1,n do t[i]=readinteger3(f[1],i) end
  elseif b==4 then for i=1,n do t[i]=readinteger4(f[1],i) end end
  return t
 end
end
do
 local files=utilities.files
 if files then
  local openfile=files.open
  local openstream=streams.open
  local openstring=streams.openstring
  local setmetatable=setmetatable
  function io.newreader(str,method)
   local f,m
   if method=="string" then
    f=openstring(str,true)
    m=streams
   elseif method=="stream" then
    f=openstream(str,true)
    m=streams
   else
    f=openfile(str,"rb")
    m=files
   end
   if f then
    local t={}
    setmetatable(t,{
     __index=function(t,k)
      local r=m[k]
      if k=="close" then
       if f then
        m.close(f)
        f=nil
       end
       return function() end
      elseif r then
       local v=function(_,a,b) return r(f,a,b) end
       t[k]=v
       return v
      else
       print("unknown key",k)
      end
     end
    } )
    return t
   end
  end
 end
end
if bit32 and not streams.tocardinal1 then
 local extract=bit32.extract
 local char=string.char
    streams.tocardinal1=char
 function streams.tocardinal2(n)   return char(extract(n,8,8),extract(n,0,8)) end
 function streams.tocardinal3(n)   return char(extract(n,16,8),extract(n,8,8),extract(n,0,8)) end
 function streams.tocardinal4(n)   return char(extract(n,24,8),extract(n,16,8),extract(n,8,8),extract(n,0,8)) end
    streams.tocardinal1le=char
 function streams.tocardinal2le(n) return char(extract(n,0,8),extract(n,8,8)) end
 function streams.tocardinal3le(n) return char(extract(n,0,8),extract(n,8,8),extract(n,16,8)) end
 function streams.tocardinal4le(n) return char(extract(n,0,8),extract(n,8,8),extract(n,16,8),extract(n,24,8)) end
end
if not streams.readcstring then
 local readchar=streams.readchar
 local concat=table.concat
 function streams.readcstring(f)
  local t={}
  while true do
   local c=readchar(f)
   if c and c~="\0" then
    t[#t+1]=c
   else
    return concat(t)
   end
  end
 end
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-str']={
 version=1.001,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
utilities=utilities or {}
utilities.strings=utilities.strings or {}
local strings=utilities.strings
local format,gsub,rep,sub,find,char=string.format,string.gsub,string.rep,string.sub,string.find,string.char
local load,dump=load,string.dump
local tonumber,type,tostring,next,setmetatable=tonumber,type,tostring,next,setmetatable
local unpack,concat=table.unpack,table.concat
local P,V,C,S,R,Ct,Cs,Cp,Carg,Cc=lpeg.P,lpeg.V,lpeg.C,lpeg.S,lpeg.R,lpeg.Ct,lpeg.Cs,lpeg.Cp,lpeg.Carg,lpeg.Cc
local patterns,lpegmatch=lpeg.patterns,lpeg.match
local tsplitat=lpeg.tsplitat
local utfchar,utfbyte,utflen=utf.char,utf.byte,utf.len
local loadstripped=function(str,shortcuts)
 if shortcuts then
  return load(dump(load(str),true),nil,nil,shortcuts)
 else
  return load(dump(load(str),true))
 end
end
if not number then number={} end 
local stripzero=patterns.stripzero
local stripzeros=patterns.stripzeros
local newline=patterns.newline
local endofstring=patterns.endofstring
local anything=patterns.anything
local whitespace=patterns.whitespace
local space=patterns.space
local spacer=patterns.spacer
local spaceortab=patterns.spaceortab
local digit=patterns.digit
local sign=patterns.sign
local period=patterns.period
local ptf=1/65536
local bpf=(7200/7227)/65536
local function points(n)
 if n==0 then
  return "0pt"
 end
 n=tonumber(n)
 if not n or n==0 then
  return "0pt"
 end
 n=n*ptf
 if n%1==0 then
  return format("%ipt",n)
 else
  return lpegmatch(stripzeros,format("%.5fpt",n)) 
 end
end
local function nupoints(n)
 if n==0 then
  return "0"
 end
 n=tonumber(n)
 if not n or n==0 then
  return "0"
 end
 n=n*ptf
 if n%1==0 then
  return format("%i",n)
 else
  return format("%.5f",n) 
 end
end
local function basepoints(n)
 if n==0 then
  return "0bp"
 end
 n=tonumber(n)
 if not n or n==0 then
  return "0bp"
 end
 n=n*bpf
 if n%1==0 then
  return format("%ibp",n)
 else
  return lpegmatch(stripzeros,format("%.5fbp",n)) 
 end
end
local function nubasepoints(n)
 if n==0 then
  return "0"
 end
 n=tonumber(n)
 if not n or n==0 then
  return "0"
 end
 n=n*bpf
 if n%1==0 then
  return format("%i",n)
 else
  return format("%.5f",n) 
 end
end
number.points=points
number.nupoints=nupoints
number.basepoints=basepoints
number.nubasepoints=nubasepoints
local rubish=spaceortab^0*newline
local anyrubish=spaceortab+newline
local stripped=(spaceortab^1/"")*newline
local leading=rubish^0/""
local trailing=(anyrubish^1*endofstring)/""
local redundant=rubish^3/"\n"
local pattern=Cs(leading*(trailing+redundant+stripped+anything)^0)
function strings.collapsecrlf(str)
 return lpegmatch(pattern,str)
end
local repeaters={} 
function strings.newrepeater(str,offset)
 offset=offset or 0
 local s=repeaters[str]
 if not s then
  s={}
  repeaters[str]=s
 end
 local t=s[offset]
 if t then
  return t
 end
 t={}
 setmetatable(t,{ __index=function(t,k)
  if not k then
   return ""
  end
  local n=k+offset
  local s=n>0 and rep(str,n) or ""
  t[k]=s
  return s
 end })
 s[offset]=t
 return t
end
local extra,tab,start=0,0,4,0
local nspaces=strings.newrepeater(" ")
string.nspaces=nspaces
local pattern=Carg(1)/function(t)
  extra,tab,start=0,t or 7,1
 end*Cs((
   Cp()*patterns.tab/function(position)
    local current=(position-start+1)+extra
    local spaces=tab-(current-1)%tab
    if spaces>0 then
     extra=extra+spaces-1
     return nspaces[spaces] 
    else
     return ""
    end
   end+newline*Cp()/function(position)
    extra,start=0,position
   end+anything
  )^1)
function strings.tabtospace(str,tab)
 return lpegmatch(pattern,str,1,tab or 7)
end
function string.utfpadding(s,n)
 if not n or n==0 then
  return ""
 end
 local l=utflen(s)
 if n>0 then
  return nspaces[n-l]
 else
  return nspaces[-n-l]
 end
end
local optionalspace=spacer^0
local nospace=optionalspace/""
local endofline=nospace*newline
local stripend=(whitespace^1*endofstring)/""
local normalline=(nospace*((1-optionalspace*(newline+endofstring))^1)*nospace)
local stripempty=endofline^1/""
local normalempty=endofline^1
local singleempty=endofline*(endofline^0/"")
local doubleempty=endofline*endofline^-1*(endofline^0/"")
local stripstart=stripempty^0
local intospace=whitespace^1/" "
local noleading=whitespace^1/""
local notrailing=noleading*endofstring
local p_prune_normal=Cs (stripstart*(stripend+normalline+normalempty )^0 )
local p_prune_collapse=Cs (stripstart*(stripend+normalline+doubleempty )^0 )
local p_prune_noempty=Cs (stripstart*(stripend+normalline+singleempty )^0 )
local p_prune_intospace=Cs (noleading*(notrailing+intospace+1     )^0 )
local p_retain_normal=Cs ((normalline+normalempty )^0 )
local p_retain_collapse=Cs ((normalline+doubleempty )^0 )
local p_retain_noempty=Cs ((normalline+singleempty )^0 )
local p_collapse_all=Cs (stripstart*(stripend+((whitespace+newline)^1/" ")+1)^0 )
local striplinepatterns={
 ["prune"]=p_prune_normal,
 ["prune and collapse"]=p_prune_collapse,
 ["prune and no empty"]=p_prune_noempty,
 ["prune and to space"]=p_prune_intospace,
 ["retain"]=p_retain_normal,
 ["retain and collapse"]=p_retain_collapse,
 ["retain and no empty"]=p_retain_noempty,
 ["collapse all"]=p_collapse_all,
 ["collapse"]=patterns.collapser,
}
setmetatable(striplinepatterns,{ __index=function(t,k) return p_prune_collapse end })
strings.striplinepatterns=striplinepatterns
function strings.striplines(str,how)
 return str and lpegmatch(striplinepatterns[how],str) or str
end
function strings.collapse(str) 
 return str and lpegmatch(p_prune_intospace,str) or str
end
strings.striplong=strings.striplines
function strings.nice(str)
 str=gsub(str,"[:%-+_]+"," ") 
 return str
end
local n=0
local sequenced=table.sequenced
function string.autodouble(s,sep)
 if s==nil then
  return '""'
 end
 local t=type(s)
 if t=="number" then
  return tostring(s) 
 end
 if t=="table" then
  return ('"'..sequenced(s,sep or ",")..'"')
 end
 return ('"'..tostring(s)..'"')
end
function string.autosingle(s,sep)
 if s==nil then
  return "''"
 end
 local t=type(s)
 if t=="number" then
  return tostring(s) 
 end
 if t=="table" then
  return ("'"..sequenced(s,sep or ",").."'")
 end
 return ("'"..tostring(s).."'")
end
local tracedchars={ [0]=
 "[null]","[soh]","[stx]","[etx]","[eot]","[enq]","[ack]","[bel]",
 "[bs]","[ht]","[lf]","[vt]","[ff]","[cr]","[so]","[si]",
 "[dle]","[dc1]","[dc2]","[dc3]","[dc4]","[nak]","[syn]","[etb]",
 "[can]","[em]","[sub]","[esc]","[fs]","[gs]","[rs]","[us]",
 "[space]",
}
string.tracedchars=tracedchars
strings.tracers=tracedchars
function string.tracedchar(b)
 if type(b)=="number" then
  return tracedchars[b] or (utfchar(b).." (U+"..format("%05X",b)..")")
 else
  local c=utfbyte(b)
  return tracedchars[c] or (b.." (U+"..(c and format("%05X",c) or "?????")..")")
 end
end
function number.signed(i)
 if i>0 then
  return "+",i
 else
  return "-",-i
 end
end
local two=digit*digit
local three=two*digit
local prefix=(Carg(1)*three)^1
local splitter=Cs (
 (((1-(three^1*period))^1+C(three))*prefix+C((1-period)^1))*(anything/""*Carg(2))*C(2)
)
local splitter3=Cs (
 three*prefix*endofstring+two*prefix*endofstring+digit*prefix*endofstring+three+two+digit
)
patterns.formattednumber=splitter
function number.formatted(n,sep1,sep2)
 if sep1==false then
  if type(n)=="number" then
   n=tostring(n)
  end
  return lpegmatch(splitter3,n,1,sep2 or ".")
 else
  if type(n)=="number" then
   n=format("%0.2f",n)
  end
  if sep1==true then
   return lpegmatch(splitter,n,1,".",",")
  elseif sep1=="." then
   return lpegmatch(splitter,n,1,sep1,sep2 or ",")
  elseif sep1=="," then
   return lpegmatch(splitter,n,1,sep1,sep2 or ".")
  else
   return lpegmatch(splitter,n,1,sep1 or ",",sep2 or ".")
  end
 end
end
local p=Cs(
  P("-")^0*(P("0")^1/"")^0*(1-period)^0*(period*P("0")^1*endofstring/""+period^0)*P(1-P("0")^1*endofstring)^0
 )
function number.compactfloat(n,fmt)
 if n==0 then
  return "0"
 elseif n==1 then
  return "1"
 end
 n=lpegmatch(p,format(fmt or "%0.3f",n))
 if n=="." or n=="" or n=="-" then
  return "0"
 end
 return n
end
local zero=P("0")^1/""
local plus=P("+")/""
local minus=P("-")
local separator=period
local trailing=zero^1*#S("eE")
local exponent=(S("eE")*(plus+Cs((minus*zero^0*endofstring)/"")+minus)*zero^0*(endofstring*Cc("0")+anything^1))
local pattern_a=Cs(minus^0*digit^1*(separator/""*trailing+separator*(trailing+digit)^0)*exponent)
local pattern_b=Cs((exponent+anything)^0)
function number.sparseexponent(f,n)
 if not n then
  n=f
  f="%e"
 end
 local tn=type(n)
 if tn=="string" then 
  local m=tonumber(n)
  if m then
   return lpegmatch((f=="%e" or f=="%E") and pattern_a or pattern_b,format(f,m))
  end
 elseif tn=="number" then
  return lpegmatch((f=="%e" or f=="%E") and pattern_a or pattern_b,format(f,n))
 end
 return tostring(n)
end
local hf={}
local hs={}
setmetatable(hf,{ __index=function(t,k)
 local v="%."..k.."f"
 t[k]=v
 return v
end } )
setmetatable(hs,{ __index=function(t,k)
 local v="%"..k.."s"
 t[k]=v
 return v
end } )
function number.formattedfloat(n,b,a)
 local s=format(hf[a],n)
 local l=(b or 0)+(a or 0)+1
 if #s<l then
  return format(hs[l],s)
 else
  return s
 end
end
local template=[[
%s
%s
return function(%s) return %s end
]]
local pattern=Cs(Cc('"')*(
 (1-S('"\\\n\r'))^1+P('"')/'\\"'+P('\\')/'\\\\'+P('\n')/'\\n'+P('\r')/'\\r'
)^0*Cc('"'))
patterns.escapedquotes=pattern
function string.escapedquotes(s)
 return lpegmatch(pattern,s)
end
local pattern=(1-P("\\"))^1;pattern=Cs (
 pattern*((P("\\")/""*(digit^-3/function(s) return char(tonumber(s)) end))+pattern )^1
)
patterns.unescapedquotes=pattern
function string.unescapedquotes(s)
 return lpegmatch(pattern,s) or s
end
string.texnewlines=lpeg.replacer(patterns.newline,"\r",true)
local preamble=""
local environment={
 global=global or _G,
 lpeg=lpeg,
 type=type,
 tostring=tostring,
 tonumber=tonumber,
 format=string.format,
 concat=table.concat,
 signed=number.signed,
 points=number.points,
 nupoints=number.nupoints,
 basepoints=number.basepoints,
 nubasepoints=number.nubasepoints,
 utfchar=utf.char,
 utfbyte=utf.byte,
 lpegmatch=lpeg.match,
 nspaces=string.nspaces,
 utfpadding=string.utfpadding,
 tracedchar=string.tracedchar,
 autosingle=string.autosingle,
 autodouble=string.autodouble,
 sequenced=table.sequenced,
 formattednumber=number.formatted,
 sparseexponent=number.sparseexponent,
 formattedfloat=number.formattedfloat,
 stripzero=patterns.stripzero,
 stripzeros=patterns.stripzeros,
 escapedquotes=string.escapedquotes,
 FORMAT=string.f6,
}
local arguments={ "a1" } 
setmetatable(arguments,{ __index=function(t,k)
  local v=t[k-1]..",a"..k
  t[k]=v
  return v
 end
})
local prefix_any=C((sign+space+period+digit)^0)
local prefix_sub=(C((sign+digit)^0)+Cc(0))*period*(C((sign+digit)^0)+Cc(0))
local prefix_tab=P("{")*C((1-P("}"))^0)*P("}")+C((1-R("az","AZ","09","%%"))^0)
local format_s=function(f)
 n=n+1
 if f and f~="" then
  return format("format('%%%ss',a%s)",f,n)
 else 
  return format("(a%s or '')",n) 
 end
end
local format_S=function(f) 
 n=n+1
 if f and f~="" then
  return format("format('%%%ss',tostring(a%s))",f,n)
 else
  return format("tostring(a%s)",n)
 end
end
local format_right=function(f)
 n=n+1
 f=tonumber(f)
 if not f or f==0 then
  return format("(a%s or '')",n)
 elseif f>0 then
  return format("utfpadding(a%s,%i)..a%s",n,f,n)
 else
  return format("a%s..utfpadding(a%s,%i)",n,n,f)
 end
end
local format_left=function(f)
 n=n+1
 f=tonumber(f)
 if not f or f==0 then
  return format("(a%s or '')",n)
 end
 if f<0 then
  return format("utfpadding(a%s,%i)..a%s",n,-f,n)
 else
  return format("a%s..utfpadding(a%s,%i)",n,n,-f)
 end
end
local format_q=JITSUPPORTED and function()
 n=n+1
 return format("(a%s ~= nil and format('%%q',tostring(a%s)) or '')",n,n)
end or function()
 n=n+1
 return format("(a%s ~= nil and format('%%q',a%s) or '')",n,n)
end
local format_Q=function() 
 n=n+1
 return format("escapedquotes(tostring(a%s))",n)
end
local format_i=function(f)
 n=n+1
 if f and f~="" then
  return format("format('%%%si',a%s)",f,n)
 else
  return format("format('%%i',a%s)",n) 
 end
end
local format_d=format_i
local format_I=function(f)
 n=n+1
 return format("format('%%s%%%si',signed(a%s))",f,n)
end
local format_f=function(f)
 n=n+1
 return format("format('%%%sf',a%s)",f,n)
end
local format_F=function(f) 
 n=n+1
 if not f or f=="" then
  return format("(((a%s > -0.0000000005 and a%s < 0.0000000005) and '0') or format((a%s %% 1 == 0) and '%%i' or '%%.9f',a%s))",n,n,n,n)
 else
  return format("format((a%s %% 1 == 0) and '%%i' or '%%%sf',a%s)",n,f,n)
 end
end
local format_k=function(b,a) 
 n=n+1
 return format("formattedfloat(a%s,%s,%s)",n,b or 0,a or 0)
end
local format_g=function(f)
 n=n+1
 return format("format('%%%sg',a%s)",f,n)
end
local format_G=function(f)
 n=n+1
 return format("format('%%%sG',a%s)",f,n)
end
local format_e=function(f)
 n=n+1
 return format("format('%%%se',a%s)",f,n)
end
local format_E=function(f)
 n=n+1
 return format("format('%%%sE',a%s)",f,n)
end
local format_j=function(f)
 n=n+1
 return format("sparseexponent('%%%se',a%s)",f,n)
end
local format_J=function(f)
 n=n+1
 return format("sparseexponent('%%%sE',a%s)",f,n)
end
local format_x=function(f)
 n=n+1
 return format("format('%%%sx',a%s)",f,n)
end
local format_X=function(f)
 n=n+1
 return format("format('%%%sX',a%s)",f,n)
end
local format_o=function(f)
 n=n+1
 return format("format('%%%so',a%s)",f,n)
end
local format_c=function()
 n=n+1
 return format("utfchar(a%s)",n)
end
local format_C=function()
 n=n+1
 return format("tracedchar(a%s)",n)
end
local format_r=function(f)
 n=n+1
 return format("format('%%%s.0f',a%s)",f,n)
end
local format_h=function(f)
 n=n+1
 if f=="-" then
  f=sub(f,2)
  return format("format('%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
 else
  return format("format('0x%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
 end
end
local format_H=function(f)
 n=n+1
 if f=="-" then
  f=sub(f,2)
  return format("format('%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
 else
  return format("format('0x%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
 end
end
local format_u=function(f)
 n=n+1
 if f=="-" then
  f=sub(f,2)
  return format("format('%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
 else
  return format("format('u+%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
 end
end
local format_U=function(f)
 n=n+1
 if f=="-" then
  f=sub(f,2)
  return format("format('%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
 else
  return format("format('U+%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
 end
end
local format_p=function()
 n=n+1
 return format("points(a%s)",n)
end
local format_P=function()
 n=n+1
 return format("nupoints(a%s)",n)
end
local format_b=function()
 n=n+1
 return format("basepoints(a%s)",n)
end
local format_B=function()
 n=n+1
 return format("nubasepoints(a%s)",n)
end
local format_t=function(f)
 n=n+1
 if f and f~="" then
  return format("concat(a%s,%q)",n,f)
 else
  return format("concat(a%s)",n)
 end
end
local format_T=function(f)
 n=n+1
 if f and f~="" then
  return format("sequenced(a%s,%q)",n,f)
 else
  return format("sequenced(a%s)",n)
 end
end
local format_l=function()
 n=n+1
 return format("(a%s and 'true' or 'false')",n)
end
local format_L=function()
 n=n+1
 return format("(a%s and 'TRUE' or 'FALSE')",n)
end
local format_n=function() 
 n=n+1
 return format("((a%s %% 1 == 0) and format('%%i',a%s) or tostring(a%s))",n,n,n)
end
local format_N  if environment.FORMAT then
 format_N=function(f)
  n=n+1
  if not f or f=="" then
   return format("FORMAT(a%s,'%%.9f')",n)
  elseif f==".6" or f=="0.6" then
   return format("FORMAT(a%s)",n)
  else
   return format("FORMAT(a%s,'%%%sf')",n,f)
  end
 end
else
 format_N=function(f) 
  n=n+1
  if not f or f=="" then
   f=".9"
  end 
  return format("(((a%s %% 1 == 0) and format('%%i',a%s)) or lpegmatch(stripzero,format('%%%sf',a%s)))",n,n,f,n)
 end
end
local format_a=function(f)
 n=n+1
 if f and f~="" then
  return format("autosingle(a%s,%q)",n,f)
 else
  return format("autosingle(a%s)",n)
 end
end
local format_A=function(f)
 n=n+1
 if f and f~="" then
  return format("autodouble(a%s,%q)",n,f)
 else
  return format("autodouble(a%s)",n)
 end
end
local format_w=function(f) 
 n=n+1
 f=tonumber(f)
 if f then 
  return format("nspaces[%s+a%s]",f,n) 
 else
  return format("nspaces[a%s]",n) 
 end
end
local format_W=function(f) 
 return format("nspaces[%s]",tonumber(f) or 0)
end
local format_m=function(f)
 n=n+1
 if not f or f=="" then
  f=","
 end
 if f=="0" then
  return format([[formattednumber(a%s,false)]],n)
 else
  return format([[formattednumber(a%s,%q,".")]],n,f)
 end
end
local format_M=function(f)
 n=n+1
 if not f or f=="" then
  f="."
 end
 if f=="0" then
  return format([[formattednumber(a%s,false)]],n)
 else
  return format([[formattednumber(a%s,%q,",")]],n,f)
 end
end
local format_z=function(f)
 n=n+(tonumber(f) or 1)
 return "''" 
end
local format_rest=function(s)
 return format("%q",s) 
end
local format_extension=function(extensions,f,name)
 local extension=extensions[name] or "tostring(%s)"
 local f=tonumber(f) or 1
 local w=find(extension,"%.%.%.")
 if f==0 then
  if w then
   extension=gsub(extension,"%.%.%.","")
  end
  return extension
 elseif f==1 then
  if w then
   extension=gsub(extension,"%.%.%.","%%s")
  end
  n=n+1
  local a="a"..n
  return format(extension,a,a) 
 elseif f<0 then
  if w then
   extension=gsub(extension,"%.%.%.","")
   return extension
  else
   local a="a"..(n+f+1)
   return format(extension,a,a)
  end
 else
  if w then
   extension=gsub(extension,"%.%.%.",rep("%%s,",f-1).."%%s")
  end
  local t={}
  for i=1,f do
   n=n+1
   t[i]="a"..n
  end
  return format(extension,unpack(t))
 end
end
local builder=Cs { "start",
 start=(
  (
   P("%")/""*(
    V("!") 
+V("s")+V("q")+V("i")+V("d")+V("f")+V("F")+V("g")+V("G")+V("e")+V("E")+V("x")+V("X")+V("o")
+V("c")+V("C")+V("S") 
+V("Q") 
+V("n") 
+V("N") 
+V("k")
+V("r")+V("h")+V("H")+V("u")+V("U")+V("p")+V("P")+V("b")+V("B")+V("t")+V("T")+V("l")+V("L")+V("I")+V("w") 
+V("W") 
+V("a") 
+V("A") 
+V("j")+V("J") 
+V("m")+V("M") 
+V("z")
+V(">") 
+V("<")
   )+V("*")
  )*(endofstring+Carg(1))
 )^0,
 ["s"]=(prefix_any*P("s"))/format_s,
 ["q"]=(prefix_any*P("q"))/format_q,
 ["i"]=(prefix_any*P("i"))/format_i,
 ["d"]=(prefix_any*P("d"))/format_d,
 ["f"]=(prefix_any*P("f"))/format_f,
 ["F"]=(prefix_any*P("F"))/format_F,
 ["g"]=(prefix_any*P("g"))/format_g,
 ["G"]=(prefix_any*P("G"))/format_G,
 ["e"]=(prefix_any*P("e"))/format_e,
 ["E"]=(prefix_any*P("E"))/format_E,
 ["x"]=(prefix_any*P("x"))/format_x,
 ["X"]=(prefix_any*P("X"))/format_X,
 ["o"]=(prefix_any*P("o"))/format_o,
 ["S"]=(prefix_any*P("S"))/format_S,
 ["Q"]=(prefix_any*P("Q"))/format_Q,
 ["n"]=(prefix_any*P("n"))/format_n,
 ["N"]=(prefix_any*P("N"))/format_N,
 ["k"]=(prefix_sub*P("k"))/format_k,
 ["c"]=(prefix_any*P("c"))/format_c,
 ["C"]=(prefix_any*P("C"))/format_C,
 ["r"]=(prefix_any*P("r"))/format_r,
 ["h"]=(prefix_any*P("h"))/format_h,
 ["H"]=(prefix_any*P("H"))/format_H,
 ["u"]=(prefix_any*P("u"))/format_u,
 ["U"]=(prefix_any*P("U"))/format_U,
 ["p"]=(prefix_any*P("p"))/format_p,
 ["P"]=(prefix_any*P("P"))/format_P,
 ["b"]=(prefix_any*P("b"))/format_b,
 ["B"]=(prefix_any*P("B"))/format_B,
 ["t"]=(prefix_tab*P("t"))/format_t,
 ["T"]=(prefix_tab*P("T"))/format_T,
 ["l"]=(prefix_any*P("l"))/format_l,
 ["L"]=(prefix_any*P("L"))/format_L,
 ["I"]=(prefix_any*P("I"))/format_I,
 ["w"]=(prefix_any*P("w"))/format_w,
 ["W"]=(prefix_any*P("W"))/format_W,
 ["j"]=(prefix_any*P("j"))/format_j,
 ["J"]=(prefix_any*P("J"))/format_J,
 ["m"]=(prefix_any*P("m"))/format_m,
 ["M"]=(prefix_any*P("M"))/format_M,
 ["z"]=(prefix_any*P("z"))/format_z,
 ["a"]=(prefix_any*P("a"))/format_a,
 ["A"]=(prefix_any*P("A"))/format_A,
 ["<"]=(prefix_any*P("<"))/format_left,
 [">"]=(prefix_any*P(">"))/format_right,
 ["*"]=Cs(((1-P("%"))^1+P("%%")/"%%")^1)/format_rest,
 ["?"]=Cs(((1-P("%"))^1      )^1)/format_rest,
 ["!"]=Carg(2)*prefix_any*P("!")*C((1-P("!"))^1)*P("!")/format_extension,
}
local xx=setmetatable({},{ __index=function(t,k) local v=format("%02x",k) t[k]=v return v end })
local XX=setmetatable({},{ __index=function(t,k) local v=format("%02X",k) t[k]=v return v end })
local preset={
 ["%02x"]=function(n) return xx[n] end,
 ["%02X"]=function(n) return XX[n] end,
}
local direct=P("%")*(sign+space+period+digit)^0*S("sqidfgGeExXo")*endofstring/[[local format = string.format return function(str) return format("%0",str) end]]
local function make(t,str)
 local f=preset[str]
 if f then
  return f
 end
 local p=lpegmatch(direct,str)
 if p then
  f=loadstripped(p)()
 else
  n=0
  p=lpegmatch(builder,str,1,t._connector_,t._extensions_) 
  if n>0 then
   p=format(template,preamble,t._preamble_,arguments[n],p)
   f=loadstripped(p,t._environment_)() 
  else
   f=function() return str end
  end
 end
 t[str]=f
 return f
end
local function use(t,fmt,...)
 return t[fmt](...)
end
strings.formatters={}
function strings.formatters.new(noconcat)
 local e={} 
 for k,v in next,environment do
  e[k]=v
 end
 local t={
  _type_="formatter",
  _connector_=noconcat and "," or "..",
  _extensions_={},
  _preamble_="",
  _environment_=e,
 }
 setmetatable(t,{ __index=make,__call=use })
 return t
end
local formatters=strings.formatters.new() 
string.formatters=formatters 
string.formatter=function(str,...) return formatters[str](...) end 
local function add(t,name,template,preamble)
 if type(t)=="table" and t._type_=="formatter" then
  t._extensions_[name]=template or "%s"
  if type(preamble)=="string" then
   t._preamble_=preamble.."\n"..t._preamble_ 
  elseif type(preamble)=="table" then
   for k,v in next,preamble do
    t._environment_[k]=v
   end
  end
 end
end
strings.formatters.add=add
patterns.xmlescape=Cs((P("<")/"&lt;"+P(">")/"&gt;"+P("&")/"&amp;"+P('"')/"&quot;"+anything)^0)
patterns.texescape=Cs((C(S("#$%\\{}"))/"\\%1"+anything)^0)
patterns.luaescape=Cs(((1-S('"\n'))^1+P('"')/'\\"'+P('\n')/'\\n"')^0) 
patterns.luaquoted=Cs(Cc('"')*((1-S('"\n'))^1+P('"')/'\\"'+P('\n')/'\\n"')^0*Cc('"'))
add(formatters,"xml",[[lpegmatch(xmlescape,%s)]],{ xmlescape=patterns.xmlescape })
add(formatters,"tex",[[lpegmatch(texescape,%s)]],{ texescape=patterns.texescape })
add(formatters,"lua",[[lpegmatch(luaescape,%s)]],{ luaescape=patterns.luaescape })
local dquote=patterns.dquote 
local equote=patterns.escaped+dquote/'\\"'+1
local cquote=Cc('"')
local pattern=Cs(dquote*(equote-P(-2))^0*dquote)     
+Cs(cquote*(equote-space)^0*space*equote^0*cquote) 
function string.optionalquoted(str)
 return lpegmatch(pattern,str) or str
end
local pattern=Cs((newline/(os.newline or "\r")+1)^0)
function string.replacenewlines(str)
 return lpegmatch(pattern,str)
end
function strings.newcollector()
 local result,r={},0
 return
  function(fmt,str,...) 
   r=r+1
   result[r]=str==nil and fmt or formatters[fmt](str,...)
  end,
  function(connector) 
   if result then
    local str=concat(result,connector)
    result,r={},0
    return str
   end
  end
end
local f_16_16=formatters["%0.5N"]
function number.to16dot16(n)
 return f_16_16(n/65536.0)
end
if not string.explode then
 local p_utf=patterns.utf8character
 local p_check=C(p_utf)*(P("+")*Cc(true))^0
 local p_split=Ct(C(p_utf)^0)
 local p_space=Ct((C(1-P(" ")^1)+P(" ")^1)^0)
 function string.explode(str,symbol)
  if symbol=="" then
   return lpegmatch(p_split,str)
  elseif symbol then
   local a,b=lpegmatch(p_check,symbol)
   if b then
    return lpegmatch(tsplitat(P(a)^1),str)
   else
    return lpegmatch(tsplitat(a),str)
   end
  else
   return lpegmatch(p_space,str)
  end
 end
end
do
 local p_whitespace=patterns.whitespace^1
 local cache=setmetatable({},{ __index=function(t,k)
  local p=tsplitat(p_whitespace*P(k)*p_whitespace)
  local v=function(s)
   return lpegmatch(p,s)
  end
  t[k]=v
  return v
 end })
 function string.wordsplitter(s)
  return cache[s]
 end
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-fil']={
 version=1.001,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local byte=string.byte
local char=string.char
utilities=utilities or {}
local files={}
utilities.files=files
local zerobased={}
function files.open(filename,zb)
 local f=io.open(filename,"rb")
 if f then
  zerobased[f]=zb or false
 end
 return f
end
function files.close(f)
 zerobased[f]=nil
 f:close()
end
function files.size(f)
 local current=f:seek()
 local size=f:seek("end")
 f:seek("set",current)
 return size
end
files.getsize=files.size
function files.setposition(f,n)
 if zerobased[f] then
  f:seek("set",n)
 else
  f:seek("set",n-1)
 end
end
function files.getposition(f)
 if zerobased[f] then
  return f:seek()
 else
  return f:seek()+1
 end
end
function files.look(f,n,chars)
 local p=f:seek()
 local s=f:read(n)
 f:seek("set",p)
 if chars then
  return s
 else
  return byte(s,1,#s)
 end
end
function files.skip(f,n)
 if n==1 then
  f:read(n)
 else
  f:seek("set",f:seek()+n)
 end
end
function files.readbyte(f)
 return byte(f:read(1))
end
function files.readbytes(f,n)
 return byte(f:read(n),1,n)
end
function files.readbytetable(f,n)
 local s=f:read(n or 1)
 return { byte(s,1,#s) } 
end
function files.readchar(f)
 return f:read(1)
end
function files.readstring(f,n)
 return f:read(n or 1)
end
function files.readinteger1(f)  
 local n=byte(f:read(1))
 if n>=0x80 then
  return n-0x100
 else
  return n
 end
end
files.readcardinal1=files.readbyte  
files.readcardinal=files.readcardinal1
files.readinteger=files.readinteger1
files.readsignedbyte=files.readinteger1
function files.readcardinal2(f)
 local a,b=byte(f:read(2),1,2)
 return 0x100*a+b
end
function files.readcardinal2le(f)
 local b,a=byte(f:read(2),1,2)
 return 0x100*a+b
end
function files.readinteger2(f)
 local a,b=byte(f:read(2),1,2)
 if a>=0x80 then
  return 0x100*a+b-0x10000
 else
  return 0x100*a+b
 end
end
function files.readinteger2le(f)
 local b,a=byte(f:read(2),1,2)
 if a>=0x80 then
  return 0x100*a+b-0x10000
 else
  return 0x100*a+b
 end
end
function files.readcardinal3(f)
 local a,b,c=byte(f:read(3),1,3)
 return 0x10000*a+0x100*b+c
end
function files.readcardinal3le(f)
 local c,b,a=byte(f:read(3),1,3)
 return 0x10000*a+0x100*b+c
end
function files.readinteger3(f)
 local a,b,c=byte(f:read(3),1,3)
 if a>=0x80 then
  return 0x10000*a+0x100*b+c-0x1000000
 else
  return 0x10000*a+0x100*b+c
 end
end
function files.readinteger3le(f)
 local c,b,a=byte(f:read(3),1,3)
 if a>=0x80 then
  return 0x10000*a+0x100*b+c-0x1000000
 else
  return 0x10000*a+0x100*b+c
 end
end
function files.readcardinal4(f)
 local a,b,c,d=byte(f:read(4),1,4)
 return 0x1000000*a+0x10000*b+0x100*c+d
end
function files.readcardinal4le(f)
 local d,c,b,a=byte(f:read(4),1,4)
 return 0x1000000*a+0x10000*b+0x100*c+d
end
function files.readinteger4(f)
 local a,b,c,d=byte(f:read(4),1,4)
 if a>=0x80 then
  return 0x1000000*a+0x10000*b+0x100*c+d-0x100000000
 else
  return 0x1000000*a+0x10000*b+0x100*c+d
 end
end
function files.readinteger4le(f)
 local d,c,b,a=byte(f:read(4),1,4)
 if a>=0x80 then
  return 0x1000000*a+0x10000*b+0x100*c+d-0x100000000
 else
  return 0x1000000*a+0x10000*b+0x100*c+d
 end
end
function files.readfixed2(f)
 local a,b=byte(f:read(2),1,2)
 if a>=0x80 then
  return (a-0x100)+b/0x100
 else
  return (a  )+b/0x100
 end
end
function files.readfixed4(f)
 local a,b,c,d=byte(f:read(4),1,4)
 if a>=0x80 then
  return (0x100*a+b-0x10000)+(0x100*c+d)/0x10000
 else
  return (0x100*a+b    )+(0x100*c+d)/0x10000
 end
end
if bit32 then
 local extract=bit32.extract
 local band=bit32.band
 function files.read2dot14(f)
  local a,b=byte(f:read(2),1,2)
  if a>=0x80 then
   local n=-(0x100*a+b)
   return-(extract(n,14,2)+(band(n,0x3FFF)/16384.0))
  else
   local n=0x100*a+b
   return   (extract(n,14,2)+(band(n,0x3FFF)/16384.0))
  end
 end
end
function files.skipshort(f,n)
 f:read(2*(n or 1))
end
function files.skiplong(f,n)
 f:read(4*(n or 1))
end
if bit32 then
 local rshift=bit32.rshift
 function files.writecardinal2(f,n)
  local a=char(n%256)
  n=rshift(n,8)
  local b=char(n%256)
  f:write(b,a)
 end
else
 local floor=math.floor
 function files.writecardinal2(f,n)
  local a=char(n%256)
  n=floor(n/256)
  local b=char(n%256)
  f:write(b,a)
 end
end
function files.writecardinal4(f,n)
 local a=char(n%256)
 n=rshift(n,8)
 local b=char(n%256)
 n=rshift(n,8)
 local c=char(n%256)
 n=rshift(n,8)
 local d=char(n%256)
 f:write(d,c,b,a)
end
function files.writestring(f,s)
 f:write(char(byte(s,1,#s)))
end
function files.writebyte(f,b)
 f:write(char(b))
end
if fio and fio.readcardinal1 then
 files.readcardinal1=fio.readcardinal1
 files.readcardinal2=fio.readcardinal2
 files.readcardinal3=fio.readcardinal3
 files.readcardinal4=fio.readcardinal4
 files.readinteger1=fio.readinteger1
 files.readinteger2=fio.readinteger2
 files.readinteger3=fio.readinteger3
 files.readinteger4=fio.readinteger4
 files.readfixed2=fio.readfixed2
 files.readfixed4=fio.readfixed4
 files.read2dot14=fio.read2dot14
 files.setposition=fio.setposition
 files.getposition=fio.getposition
 files.readbyte=files.readcardinal1
 files.readsignedbyte=files.readinteger1
 files.readcardinal=files.readcardinal1
 files.readinteger=files.readinteger1
 local skipposition=fio.skipposition
 files.skipposition=skipposition
 files.readbytes=fio.readbytes
 files.readbytetable=fio.readbytetable
 function files.skipshort(f,n)
  skipposition(f,2*(n or 1))
 end
 function files.skiplong(f,n)
  skipposition(f,4*(n or 1))
 end
end
if fio and fio.readcardinaltable then
 files.readcardinaltable=fio.readcardinaltable
 files.readintegertable=fio.readintegertable
else
 local readcardinal1=files.readcardinal1
 local readcardinal2=files.readcardinal2
 local readcardinal3=files.readcardinal3
 local readcardinal4=files.readcardinal4
 function files.readcardinaltable(f,n,b)
  local t={}
   if b==1 then for i=1,n do t[i]=readcardinal1(f) end
  elseif b==2 then for i=1,n do t[i]=readcardinal2(f) end
  elseif b==3 then for i=1,n do t[i]=readcardinal3(f) end
  elseif b==4 then for i=1,n do t[i]=readcardinal4(f) end end
  return t
 end
 local readinteger1=files.readinteger1
 local readinteger2=files.readinteger2
 local readinteger3=files.readinteger3
 local readinteger4=files.readinteger4
 function files.readintegertable(f,n,b)
  local t={}
   if b==1 then for i=1,n do t[i]=readinteger1(f) end
  elseif b==2 then for i=1,n do t[i]=readinteger2(f) end
  elseif b==3 then for i=1,n do t[i]=readinteger3(f) end
  elseif b==4 then for i=1,n do t[i]=readinteger4(f) end end
  return t
 end
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-tab']={
 version=1.001,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
utilities=utilities or {}
utilities.tables=utilities.tables or {}
local tables=utilities.tables
local format,gmatch,gsub,sub=string.format,string.gmatch,string.gsub,string.sub
local concat,insert,remove,sort=table.concat,table.insert,table.remove,table.sort
local setmetatable,getmetatable,tonumber,tostring,rawget=setmetatable,getmetatable,tonumber,tostring,rawget
local type,next,rawset,tonumber,tostring,load,select=type,next,rawset,tonumber,tostring,load,select
local lpegmatch,P,Cs,Cc=lpeg.match,lpeg.P,lpeg.Cs,lpeg.Cc
local sortedkeys,sortedpairs=table.sortedkeys,table.sortedpairs
local formatters=string.formatters
local utftoeight=utf.toeight
local splitter=lpeg.tsplitat(".")
function utilities.tables.definetable(target,nofirst,nolast) 
 local composed=nil
 local t={}
 local snippets=lpegmatch(splitter,target)
 for i=1,#snippets-(nolast and 1 or 0) do
  local name=snippets[i]
  if composed then
   composed=composed.."."..name
    t[#t+1]=formatters["if not %s then %s = { } end"](composed,composed)
  else
   composed=name
   if not nofirst then
    t[#t+1]=formatters["%s = %s or { }"](composed,composed)
   end
  end
 end
 if composed then
  if nolast then
   composed=composed.."."..snippets[#snippets]
  end
  return concat(t,"\n"),composed 
 else
  return "",target
 end
end
function tables.definedtable(...)
 local t=_G
 for i=1,select("#",...) do
  local li=select(i,...)
  local tl=t[li]
  if not tl then
   tl={}
   t[li]=tl
  end
  t=tl
 end
 return t
end
function tables.accesstable(target,root)
 local t=root or _G
 for name in gmatch(target,"([^%.]+)") do
  t=t[name]
  if not t then
   return
  end
 end
 return t
end
function tables.migratetable(target,v,root)
 local t=root or _G
 local names=lpegmatch(splitter,target)
 for i=1,#names-1 do
  local name=names[i]
  t[name]=t[name] or {}
  t=t[name]
  if not t then
   return
  end
 end
 t[names[#names]]=v
end
function tables.removevalue(t,value) 
 if value then
  for i=1,#t do
   if t[i]==value then
    remove(t,i)
   end
  end
 end
end
function tables.replacevalue(t,oldvalue,newvalue)
 if oldvalue and newvalue then
  for i=1,#t do
   if t[i]==oldvalue then
    t[i]=newvalue
   end
  end
 end
end
function tables.insertbeforevalue(t,value,extra)
 for i=1,#t do
  if t[i]==extra then
   remove(t,i)
  end
 end
 for i=1,#t do
  if t[i]==value then
   insert(t,i,extra)
   return
  end
 end
 insert(t,1,extra)
end
function tables.insertaftervalue(t,value,extra)
 for i=1,#t do
  if t[i]==extra then
   remove(t,i)
  end
 end
 for i=1,#t do
  if t[i]==value then
   insert(t,i+1,extra)
   return
  end
 end
 insert(t,#t+1,extra)
end
local escape=Cs(Cc('"')*((P('"')/'""'+P(1))^0)*Cc('"'))
function table.tocsv(t,specification)
 if t and #t>0 then
  local result={}
  local r={}
  specification=specification or {}
  local fields=specification.fields
  if type(fields)~="string" then
   fields=sortedkeys(t[1])
  end
  local separator=specification.separator or ","
  local noffields=#fields
  if specification.preamble==true then
   for f=1,noffields do
    r[f]=lpegmatch(escape,tostring(fields[f]))
   end
   result[1]=concat(r,separator)
  end
  for i=1,#t do
   local ti=t[i]
   for f=1,noffields do
    local field=ti[fields[f]]
    if type(field)=="string" then
     r[f]=lpegmatch(escape,field)
    else
     r[f]=tostring(field)
    end
   end
   result[i+1]=concat(r,separator)
  end
  return concat(result,"\n")
 else
  return ""
 end
end
local nspaces=utilities.strings.newrepeater(" ")
local function toxml(t,d,result,step)
 local r=#result
 for k,v in sortedpairs(t) do
  local s=nspaces[d] 
  local tk=type(k)
  local tv=type(v)
  if tv=="table" then
   if tk=="number" then
    r=r+1 result[r]=formatters["%s<entry n='%s'>"](s,k)
    toxml(v,d+step,result,step)
    r=r+1 result[r]=formatters["%s</entry>"](s,k)
   else
    r=r+1 result[r]=formatters["%s<%s>"](s,k)
    toxml(v,d+step,result,step)
    r=r+1 result[r]=formatters["%s</%s>"](s,k)
   end
  elseif tv=="string" then
   if tk=="number" then
    r=r+1 result[r]=formatters["%s<entry n='%s'>%!xml!</entry>"](s,k,v,k)
   else
    r=r+1 result[r]=formatters["%s<%s>%!xml!</%s>"](s,k,v,k)
   end
  elseif tk=="number" then
   r=r+1 result[r]=formatters["%s<entry n='%s'>%S</entry>"](s,k,v,k)
  else
   r=r+1 result[r]=formatters["%s<%s>%S</%s>"](s,k,v,k)
  end
 end
end
function table.toxml(t,specification)
 specification=specification or {}
 local name=specification.name
 local noroot=name==false
 local result=(specification.nobanner or noroot) and {} or { "<?xml version='1.0' standalone='yes' ?>" }
 local indent=specification.indent or 0
 local spaces=specification.spaces or 1
 if noroot then
  toxml(t,indent,result,spaces)
 else
  toxml({ [name or "data"]=t },indent,result,spaces)
 end
 return concat(result,"\n")
end
function tables.encapsulate(core,capsule,protect)
 if type(capsule)~="table" then
  protect=true
  capsule={}
 end
 for key,value in next,core do
  if capsule[key] then
   print(formatters["\ninvalid %s %a in %a"]("inheritance",key,core))
   os.exit()
  else
   capsule[key]=value
  end
 end
 if protect then
  for key,value in next,core do
   core[key]=nil
  end
  setmetatable(core,{
   __index=capsule,
   __newindex=function(t,key,value)
    if capsule[key] then
     print(formatters["\ninvalid %s %a' in %a"]("overload",key,core))
     os.exit()
    else
     rawset(t,key,value)
    end
   end
  } )
 end
end
if JITSUPPORTED then
 local f_hashed_string=formatters["[%Q]=%Q,"]
 local f_hashed_number=formatters["[%Q]=%s,"]
 local f_hashed_boolean=formatters["[%Q]=%l,"]
 local f_hashed_table=formatters["[%Q]="]
 local f_indexed_string=formatters["[%s]=%Q,"]
 local f_indexed_number=formatters["[%s]=%s,"]
 local f_indexed_boolean=formatters["[%s]=%l,"]
 local f_indexed_table=formatters["[%s]="]
 local f_ordered_string=formatters["%Q,"]
 local f_ordered_number=formatters["%s,"]
 local f_ordered_boolean=formatters["%l,"]
 function table.fastserialize(t,prefix)
  local r={ type(prefix)=="string" and prefix or "return" }
  local m=1
  local function fastserialize(t,outer) 
   local n=#t
   m=m+1
   r[m]="{"
   if n>0 then
    local v=t[0]
    if v then
     local tv=type(v)
     if tv=="string" then
      m=m+1 r[m]=f_indexed_string(0,v)
     elseif tv=="number" then
      m=m+1 r[m]=f_indexed_number(0,v)
     elseif tv=="table" then
      m=m+1 r[m]=f_indexed_table(0)
      fastserialize(v)
      m=m+1 r[m]=f_indexed_table(0)
     elseif tv=="boolean" then
      m=m+1 r[m]=f_indexed_boolean(0,v)
     end
    end
    for i=1,n do
     local v=t[i]
     local tv=type(v)
     if tv=="string" then
      m=m+1 r[m]=f_ordered_string(v)
     elseif tv=="number" then
      m=m+1 r[m]=f_ordered_number(v)
     elseif tv=="table" then
      fastserialize(v)
     elseif tv=="boolean" then
      m=m+1 r[m]=f_ordered_boolean(v)
     end
    end
   end
   for k,v in next,t do
    local tk=type(k)
    if tk=="number" then
     if k>n or k<0 then
      local tv=type(v)
      if tv=="string" then
       m=m+1 r[m]=f_indexed_string(k,v)
      elseif tv=="number" then
       m=m+1 r[m]=f_indexed_number(k,v)
      elseif tv=="table" then
       m=m+1 r[m]=f_indexed_table(k)
       fastserialize(v)
      elseif tv=="boolean" then
       m=m+1 r[m]=f_indexed_boolean(k,v)
      end
     end
    else
     local tv=type(v)
     if tv=="string" then
      m=m+1 r[m]=f_hashed_string(k,v)
     elseif tv=="number" then
      m=m+1 r[m]=f_hashed_number(k,v)
     elseif tv=="table" then
      m=m+1 r[m]=f_hashed_table(k)
      fastserialize(v)
     elseif tv=="boolean" then
      m=m+1 r[m]=f_hashed_boolean(k,v)
     end
    end
   end
   m=m+1
   if outer then
    r[m]="}"
   else
    r[m]="},"
   end
   return r
  end
  return concat(fastserialize(t,true))
 end
else
 function table.fastserialize(t,prefix) 
  local r={ type(prefix)=="string" and prefix or "return" }
  local m=1
  local function fastserialize(t,outer) 
   local n=#t
   m=m+1
   r[m]="{"
   if n>0 then
    local v=t[0]
    if v then
     m=m+1
     r[m]="[0]="
     if type(v)=="table" then
      fastserialize(v)
     else
      r[m]=format("%q,",v)
     end
    end
    for i=1,n do
     local v=t[i]
     m=m+1
     if type(v)=="table" then
      r[m]=format("[%i]=",i)
      fastserialize(v)
     else
      r[m]=format("[%i]=%q,",i,v)
     end
    end
   end
   for k,v in next,t do
    local tk=type(k)
    if tk=="number" then
     if k>n or k<0 then
      m=m+1
      if type(v)=="table" then
       r[m]=format("[%i]=",k)
       fastserialize(v)
      else
       r[m]=format("[%i]=%q,",k,v)
      end
     end
    else
     m=m+1
     if type(v)=="table" then
      r[m]=format("[%q]=",k)
      fastserialize(v)
     else
      r[m]=format("[%q]=%q,",k,v)
     end
    end
   end
   m=m+1
   if outer then
    r[m]="}"
   else
    r[m]="},"
   end
   return r
  end
  return concat(fastserialize(t,true))
 end
end
function table.deserialize(str)
 if not str or str=="" then
  return
 end
 local code=load(str)
 if not code then
  return
 end
 code=code()
 if not code then
  return
 end
 return code
end
function table.load(filename,loader)
 if filename then
  local t=(loader or io.loaddata)(filename)
  if t and t~="" then
   local t=utftoeight(t)
   t=load(t)
   if type(t)=="function" then
    t=t()
    if type(t)=="table" then
     return t
    end
   end
  end
 end
end
function table.save(filename,t,n,...)
 io.savedata(filename,table.serialize(t,n==nil and true or n,...)) 
end
local f_key_value=formatters["%s=%q"]
local f_add_table=formatters[" {%t},\n"]
local f_return_table=formatters["return {\n%t}"]
local function slowdrop(t) 
 local r={}
 local l={}
 for i=1,#t do
  local ti=t[i]
  local j=0
  for k,v in next,ti do
   j=j+1
   l[j]=f_key_value(k,v)
  end
  r[i]=f_add_table(l)
 end
 return f_return_table(r)
end
local function fastdrop(t)
 local r={ "return {\n" }
 local m=1
 for i=1,#t do
  local ti=t[i]
  m=m+1 r[m]=" {"
  for k,v in next,ti do
   m=m+1 r[m]=f_key_value(k,v)
  end
  m=m+1 r[m]="},\n"
 end
 m=m+1
 r[m]="}"
 return concat(r)
end
function table.drop(t,slow) 
 if #t==0 then
  return "return { }"
 elseif slow==true then
  return slowdrop(t) 
 else
  return fastdrop(t) 
 end
end
local selfmapper={ __index=function(t,k) t[k]=k return k end }
function table.twowaymapper(t) 
 if not t then     
  t={}       
 else        
  local zero=rawget(t,0)  
  for i=zero and 0 or 1,#t do
   local ti=t[i]    
   if ti then
    local i=tostring(i)
    t[i]=ti   
    t[ti]=i    
   end
  end
 end
 setmetatable(t,selfmapper)
 return t
end
local f_start_key_idx=formatters["%w{"]
local f_start_key_num=JITSUPPORTED and formatters["%w[%s]={"] or formatters["%w[%q]={"]
local f_start_key_str=formatters["%w[%q]={"]
local f_start_key_boo=formatters["%w[%l]={"]
local f_start_key_nop=formatters["%w{"]
local f_stop=formatters["%w},"]
local f_key_num_value_num=JITSUPPORTED and formatters["%w[%s]=%s,"] or formatters["%w[%s]=%q,"]
local f_key_str_value_num=JITSUPPORTED and formatters["%w[%Q]=%s,"] or formatters["%w[%Q]=%q,"]
local f_key_boo_value_num=JITSUPPORTED and formatters["%w[%l]=%s,"] or formatters["%w[%l]=%q,"]
local f_key_num_value_str=JITSUPPORTED and formatters["%w[%s]=%Q,"] or formatters["%w[%q]=%Q,"]
local f_key_str_value_str=formatters["%w[%Q]=%Q,"]
local f_key_boo_value_str=formatters["%w[%l]=%Q,"]
local f_key_num_value_boo=JITSUPPORTED and formatters["%w[%s]=%l,"] or formatters["%w[%q]=%l,"]
local f_key_str_value_boo=formatters["%w[%Q]=%l,"]
local f_key_boo_value_boo=formatters["%w[%l]=%l,"]
local f_key_num_value_not=JITSUPPORTED and formatters["%w[%s]={},"] or formatters["%w[%q]={},"]
local f_key_str_value_not=formatters["%w[%Q]={},"]
local f_key_boo_value_not=formatters["%w[%l]={},"]
local f_key_num_value_seq=JITSUPPORTED and formatters["%w[%s]={ %, t },"] or formatters["%w[%q]={ %, t },"]
local f_key_str_value_seq=formatters["%w[%Q]={ %, t },"]
local f_key_boo_value_seq=formatters["%w[%l]={ %, t },"]
local f_val_num=JITSUPPORTED and formatters["%w%s,"] or formatters["%w%q,"]
local f_val_str=formatters["%w%Q,"]
local f_val_boo=formatters["%w%l,"]
local f_val_not=formatters["%w{},"]
local f_val_seq=formatters["%w{ %, t },"]
local f_fin_seq=formatters[" %, t }"]
local f_table_return=formatters["return {"]
local f_table_name=formatters["%s={"]
local f_table_direct=formatters["{"]
local f_table_entry=formatters["[%Q]={"]
local f_table_finish=formatters["}"]
local spaces=utilities.strings.newrepeater(" ")
local original_serialize=table.serialize
local is_simple_table=table.is_simple_table
local function serialize(root,name,specification)
 if type(specification)=="table" then
  return original_serialize(root,name,specification) 
 end
 local t 
 local n=1
 local unknown=false
 local function do_serialize(root,name,depth,level,indexed)
  if level>0 then
   n=n+1
   if indexed then
    t[n]=f_start_key_idx(depth)
   else
    local tn=type(name)
    if tn=="number" then
     t[n]=f_start_key_num(depth,name)
    elseif tn=="string" then
     t[n]=f_start_key_str(depth,name)
    elseif tn=="boolean" then
     t[n]=f_start_key_boo(depth,name)
    else
     t[n]=f_start_key_nop(depth)
    end
   end
   depth=depth+1
  end
  if root and next(root)~=nil then
   local first=nil
   local last=#root
   if last>0 then
    for k=1,last do
     if rawget(root,k)==nil then
      last=k-1
      break
     end
    end
    if last>0 then
     first=1
    end
   end
   local sk=sortedkeys(root)
   for i=1,#sk do
    local k=sk[i]
    local v=root[k]
    local tv=type(v)
    local tk=type(k)
    if first and tk=="number" and k<=last and k>=first then
     if tv=="number" then
      n=n+1 t[n]=f_val_num(depth,v)
     elseif tv=="string" then
      n=n+1 t[n]=f_val_str(depth,v)
     elseif tv=="table" then
      if next(v)==nil then 
       n=n+1 t[n]=f_val_not(depth)
      else
       local st=is_simple_table(v)
       if st then
        n=n+1 t[n]=f_val_seq(depth,st)
       else
        do_serialize(v,k,depth,level+1,true)
       end
      end
     elseif tv=="boolean" then
      n=n+1 t[n]=f_val_boo(depth,v)
     elseif unknown then
      n=n+1 t[n]=f_val_str(depth,tostring(v))
     end
    elseif tv=="number" then
     if tk=="number" then
      n=n+1 t[n]=f_key_num_value_num(depth,k,v)
     elseif tk=="string" then
      n=n+1 t[n]=f_key_str_value_num(depth,k,v)
     elseif tk=="boolean" then
      n=n+1 t[n]=f_key_boo_value_num(depth,k,v)
     elseif unknown then
      n=n+1 t[n]=f_key_str_value_num(depth,tostring(k),v)
     end
    elseif tv=="string" then
     if tk=="number" then
      n=n+1 t[n]=f_key_num_value_str(depth,k,v)
     elseif tk=="string" then
      n=n+1 t[n]=f_key_str_value_str(depth,k,v)
     elseif tk=="boolean" then
      n=n+1 t[n]=f_key_boo_value_str(depth,k,v)
     elseif unknown then
      n=n+1 t[n]=f_key_str_value_str(depth,tostring(k),v)
     end
    elseif tv=="table" then
     if next(v)==nil then
      if tk=="number" then
       n=n+1 t[n]=f_key_num_value_not(depth,k)
      elseif tk=="string" then
       n=n+1 t[n]=f_key_str_value_not(depth,k)
      elseif tk=="boolean" then
       n=n+1 t[n]=f_key_boo_value_not(depth,k)
      elseif unknown then
       n=n+1 t[n]=f_key_str_value_not(depth,tostring(k))
      end
     else
      local st=is_simple_table(v)
      if not st then
       do_serialize(v,k,depth,level+1)
      elseif tk=="number" then
       n=n+1 t[n]=f_key_num_value_seq(depth,k,st)
      elseif tk=="string" then
       n=n+1 t[n]=f_key_str_value_seq(depth,k,st)
      elseif tk=="boolean" then
       n=n+1 t[n]=f_key_boo_value_seq(depth,k,st)
      elseif unknown then
       n=n+1 t[n]=f_key_str_value_seq(depth,tostring(k),st)
      end
     end
    elseif tv=="boolean" then
     if tk=="number" then
      n=n+1 t[n]=f_key_num_value_boo(depth,k,v)
     elseif tk=="string" then
      n=n+1 t[n]=f_key_str_value_boo(depth,k,v)
     elseif tk=="boolean" then
      n=n+1 t[n]=f_key_boo_value_boo(depth,k,v)
     elseif unknown then
      n=n+1 t[n]=f_key_str_value_boo(depth,tostring(k),v)
     end
    else
     if tk=="number" then
      n=n+1 t[n]=f_key_num_value_str(depth,k,tostring(v))
     elseif tk=="string" then
      n=n+1 t[n]=f_key_str_value_str(depth,k,tostring(v))
     elseif tk=="boolean" then
      n=n+1 t[n]=f_key_boo_value_str(depth,k,tostring(v))
     elseif unknown then
      n=n+1 t[n]=f_key_str_value_str(depth,tostring(k),tostring(v))
     end
    end
   end
  end
  if level>0 then
   n=n+1 t[n]=f_stop(depth-1)
  end
 end
 local tname=type(name)
 if tname=="string" then
  if name=="return" then
   t={ f_table_return() }
  else
   t={ f_table_name(name) }
  end
 elseif tname=="number" then
  t={ f_table_entry(name) }
 elseif tname=="boolean" then
  if name then
   t={ f_table_return() }
  else
   t={ f_table_direct() }
  end
 else
  t={ f_table_name("t") }
 end
 if root then
  if getmetatable(root) then 
   local dummy=root._w_h_a_t_e_v_e_r_ 
   root._w_h_a_t_e_v_e_r_=nil
  end
  if next(root)~=nil then
   local st=is_simple_table(root)
   if st then
    return t[1]..f_fin_seq(st) 
   else
    do_serialize(root,name,1,0)
   end
  end
 end
 n=n+1
 t[n]=f_table_finish()
 return concat(t,"\n")
end
table.serialize=serialize
if setinspector then
 setinspector("table",function(v)
  if type(v)=="table" then
   print(serialize(v,"table",{ metacheck=false }))
   return true
  end
 end)
end
local mt={
 __newindex=function(t,k,v)
  local n=t.last+1
  t.last=n
  t.list[n]=k
  t.hash[k]=v
 end,
 __index=function(t,k)
  return t.hash[k]
 end,
 __len=function(t)
  return t.last
 end,
}
function table.orderedhash()
 return setmetatable({ list={},hash={},last=0 },mt)
end
function table.ordered(t)
 local n=t.last
 if n>0 then
  local l=t.list
  local i=1
  local h=t.hash
  local f=function()
   if i<=n then
    local k=i
    local v=h[l[k]]
    i=i+1
    return k,v
   end
  end
  return f,1,h[l[1]]
 else
  return function() end
 end
end
function combine(target,source)
 if target then
  for k,v in next,source do
   if type(v)=="table" then
      target[k]=combine(target[k],source[k])
   else
      target[k]=v
   end
  end
  return target
 else
  return source
 end
end
table.combine=combine

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-sto']={
 version=1.001,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local setmetatable,getmetatable,rawset,type=setmetatable,getmetatable,rawset,type
utilities=utilities or {}
utilities.storage=utilities.storage or {}
local storage=utilities.storage
function storage.mark(t)
 if not t then
  print("\nfatal error: storage cannot be marked\n")
  os.exit()
  return
 end
 local m=getmetatable(t)
 if not m then
  m={}
  setmetatable(t,m)
 end
 m.__storage__=true
 return t
end
function storage.allocate(t)
 t=t or {}
 local m=getmetatable(t)
 if not m then
  m={}
  setmetatable(t,m)
 end
 m.__storage__=true
 return t
end
function storage.marked(t)
 local m=getmetatable(t)
 return m and m.__storage__
end
function storage.checked(t)
 if not t then
  report("\nfatal error: storage has not been allocated\n")
  os.exit()
  return
 end
 return t
end
function storage.setinitializer(data,initialize)
 local m=getmetatable(data) or {}
 m.__index=function(data,k)
  m.__index=nil 
  initialize()
  return data[k]
 end
 setmetatable(data,m)
end
local keyisvalue={ __index=function(t,k)
 t[k]=k
 return k
end }
function storage.sparse(t)
 t=t or {}
 setmetatable(t,keyisvalue)
 return t
end
local function f_empty ()         return "" end 
local function f_self  (t,k) t[k]=k      return k  end
local function f_table (t,k) local v={} t[k]=v return v  end
local function f_number(t,k) t[k]=0      return 0  end 
local function f_ignore()          end 
local f_index={
 ["empty"]=f_empty,
 ["self"]=f_self,
 ["table"]=f_table,
 ["number"]=f_number,
}
function table.setmetatableindex(t,f)
 if type(t)~="table" then
  f,t=t,{}
 end
 local m=getmetatable(t)
 local i=f_index[f] or f
 if m then
  m.__index=i
 else
  setmetatable(t,{ __index=i })
 end
 return t
end
local f_index={
 ["ignore"]=f_ignore,
}
function table.setmetatablenewindex(t,f)
 if type(t)~="table" then
  f,t=t,{}
 end
 local m=getmetatable(t)
 local i=f_index[f] or f
 if m then
  m.__newindex=i
 else
  setmetatable(t,{ __newindex=i })
 end
 return t
end
function table.setmetatablecall(t,f)
 if type(t)~="table" then
  f,t=t,{}
 end
 local m=getmetatable(t)
 if m then
  m.__call=f
 else
  setmetatable(t,{ __call=f })
 end
 return t
end
function table.setmetatableindices(t,f,n,c)
 if type(t)~="table" then
  f,t=t,{}
 end
 local m=getmetatable(t)
 local i=f_index[f] or f
 if m then
  m.__index=i
  m.__newindex=n
  m.__call=c
 else
  setmetatable(t,{
   __index=i,
   __newindex=n,
   __call=c,
  })
 end
 return t
end
function table.setmetatablekey(t,key,value)
 local m=getmetatable(t)
 if not m then
  m={}
  setmetatable(t,m)
 end
 m[key]=value
 return t
end
function table.getmetatablekey(t,key,value)
 local m=getmetatable(t)
 return m and m[key]
end
function table.makeweak(t)
 if not t then
  t={}
 end
 local m=getmetatable(t)
 if m then
  m.__mode="v"
 else
  setmetatable(t,{ __mode="v" })
 end
 return t
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-prs']={
 version=1.001,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local lpeg,table,string=lpeg,table,string
local P,R,V,S,C,Ct,Cs,Carg,Cc,Cg,Cf,Cp=lpeg.P,lpeg.R,lpeg.V,lpeg.S,lpeg.C,lpeg.Ct,lpeg.Cs,lpeg.Carg,lpeg.Cc,lpeg.Cg,lpeg.Cf,lpeg.Cp
local lpegmatch,lpegpatterns=lpeg.match,lpeg.patterns
local concat,gmatch,find=table.concat,string.gmatch,string.find
local tonumber,tostring,type,next,rawset=tonumber,tostring,type,next,rawset
local mod,div=math.mod,math.div
utilities=utilities or {}
local parsers=utilities.parsers or {}
utilities.parsers=parsers
local patterns=parsers.patterns or {}
parsers.patterns=patterns
local setmetatableindex=table.setmetatableindex
local sortedhash=table.sortedhash
local sortedkeys=table.sortedkeys
local tohash=table.tohash
local hashes={}
parsers.hashes=hashes
local digit=R("09")
local space=P(' ')
local equal=P("=")
local colon=P(":")
local comma=P(",")
local lbrace=P("{")
local rbrace=P("}")
local lparent=P("(")
local rparent=P(")")
local lbracket=P("[")
local rbracket=P("]")
local period=S(".")
local punctuation=S(".,:;")
local spacer=lpegpatterns.spacer
local whitespace=lpegpatterns.whitespace
local newline=lpegpatterns.newline
local anything=lpegpatterns.anything
local endofstring=lpegpatterns.endofstring
local nobrace=1-(lbrace+rbrace )
local noparent=1-(lparent+rparent)
local nobracket=1-(lbracket+rbracket)
local escape,left,right=P("\\"),P('{'),P('}')
lpegpatterns.balanced=P {
 ((escape*(left+right))+(1-(left+right))+V(2))^0,
 left*V(1)*right
}
local nestedbraces=P { lbrace*(nobrace+V(1))^0*rbrace }
local nestedparents=P { lparent*(noparent+V(1))^0*rparent }
local nestedbrackets=P { lbracket*(nobracket+V(1))^0*rbracket }
local spaces=space^0
local argument=Cs((lbrace/"")*((nobrace+nestedbraces)^0)*(rbrace/""))
local content=(1-endofstring)^0
lpegpatterns.nestedbraces=nestedbraces   
lpegpatterns.nestedparents=nestedparents  
lpegpatterns.nestedbrackets=nestedbrackets 
lpegpatterns.nested=nestedbraces   
lpegpatterns.argument=argument    
lpegpatterns.content=content  
local value=lbrace*C((nobrace+nestedbraces)^0)*rbrace+C((nestedbraces+(1-comma))^0)
local key=C((1-equal-comma)^1)
local pattern_a=(space+comma)^0*(key*equal*value+key*C(""))
local pattern_c=(space+comma)^0*(key*equal*value)
local pattern_d=(space+comma)^0*(key*(equal+colon)*value+key*C(""))
local key=C((1-space-equal-comma)^1)
local pattern_b=spaces*comma^0*spaces*(key*((spaces*equal*spaces*value)+C("")))
local hash={}
local function set(key,value)
 hash[key]=value
end
local pattern_a_s=(pattern_a/set)^1
local pattern_b_s=(pattern_b/set)^1
local pattern_c_s=(pattern_c/set)^1
local pattern_d_s=(pattern_d/set)^1
patterns.settings_to_hash_a=pattern_a_s
patterns.settings_to_hash_b=pattern_b_s
patterns.settings_to_hash_c=pattern_c_s
patterns.settings_to_hash_d=pattern_d_s
function parsers.make_settings_to_hash_pattern(set,how)
 if how=="strict" then
  return (pattern_c/set)^1
 elseif how=="tolerant" then
  return (pattern_b/set)^1
 else
  return (pattern_a/set)^1
 end
end
function parsers.settings_to_hash(str,existing)
 if not str or str=="" then
  return {}
 elseif type(str)=="table" then
  if existing then
   for k,v in next,str do
    existing[k]=v
   end
   return exiting
  else
   return str
  end
 else
  hash=existing or {}
  lpegmatch(pattern_a_s,str)
  return hash
 end
end
function parsers.settings_to_hash_colon_too(str)
 if not str or str=="" then
  return {}
 elseif type(str)=="table" then
  return str
 else
  hash={}
  lpegmatch(pattern_d_s,str)
  return hash
 end
end
function parsers.settings_to_hash_tolerant(str,existing)
 if not str or str=="" then
  return {}
 elseif type(str)=="table" then
  if existing then
   for k,v in next,str do
    existing[k]=v
   end
   return exiting
  else
   return str
  end
 else
  hash=existing or {}
  lpegmatch(pattern_b_s,str)
  return hash
 end
end
function parsers.settings_to_hash_strict(str,existing)
 if not str or str=="" then
  return nil
 elseif type(str)=="table" then
  if existing then
   for k,v in next,str do
    existing[k]=v
   end
   return exiting
  else
   return str
  end
 elseif str and str~="" then
  hash=existing or {}
  lpegmatch(pattern_c_s,str)
  return next(hash) and hash
 end
end
local separator=comma*space^0
local value=lbrace*C((nobrace+nestedbraces)^0)*rbrace+C((nestedbraces+(1-comma))^0)
local pattern=spaces*Ct(value*(separator*value)^0)
patterns.settings_to_array=pattern
function parsers.settings_to_array(str,strict)
 if not str or str=="" then
  return {}
 elseif type(str)=="table" then
  return str
 elseif strict then
  if find(str,"{",1,true) then
   return lpegmatch(pattern,str)
  else
   return { str }
  end
 elseif find(str,",",1,true) then
  return lpegmatch(pattern,str)
 else
  return { str }
 end
end
function parsers.settings_to_numbers(str)
 if not str or str=="" then
  return {}
 end
 if type(str)=="table" then
 elseif find(str,",",1,true) then
  str=lpegmatch(pattern,str)
 else
  return { tonumber(str) }
 end
 for i=1,#str do
  str[i]=tonumber(str[i])
 end
 return str
end
local value=lbrace*C((nobrace+nestedbraces)^0)*rbrace+C((nestedbraces+nestedbrackets+nestedparents+(1-comma))^0)
local pattern=spaces*Ct(value*(separator*value)^0)
function parsers.settings_to_array_obey_fences(str)
 return lpegmatch(pattern,str)
end
local cache_a={}
local cache_b={}
function parsers.groupedsplitat(symbol,withaction)
 if not symbol then
  symbol=","
 end
 local pattern=(withaction and cache_b or cache_a)[symbol]
 if not pattern then
  local symbols=S(symbol)
  local separator=space^0*symbols*space^0
  local value=lbrace*C((nobrace+nestedbraces)^0)
*(rbrace*(#symbols+P(-1))) 
+C((nestedbraces+(1-(space^0*(symbols+P(-1)))))^0)
  if withaction then
   local withvalue=Carg(1)*value/function(f,s) return f(s) end
   pattern=spaces*withvalue*(separator*withvalue)^0
   cache_b[symbol]=pattern
  else
   pattern=spaces*Ct(value*(separator*value)^0)
   cache_a[symbol]=pattern
  end
 end
 return pattern
end
local pattern_a=parsers.groupedsplitat(",",false)
local pattern_b=parsers.groupedsplitat(",",true)
function parsers.stripped_settings_to_array(str)
 if not str or str=="" then
  return {}
 else
  return lpegmatch(pattern_a,str)
 end
end
function parsers.process_stripped_settings(str,action)
 if not str or str=="" then
  return {}
 else
  return lpegmatch(pattern_b,str,1,action)
 end
end
local function set(t,v)
 t[#t+1]=v
end
local value=P(Carg(1)*value)/set
local pattern=value*(separator*value)^0*Carg(1)
function parsers.add_settings_to_array(t,str)
 return lpegmatch(pattern,str,nil,t)
end
function parsers.hash_to_string(h,separator,yes,no,strict,omit)
 if h then
  local t={}
  local tn=0
  local s=sortedkeys(h)
  omit=omit and tohash(omit)
  for i=1,#s do
   local key=s[i]
   if not omit or not omit[key] then
    local value=h[key]
    if type(value)=="boolean" then
     if yes and no then
      if value then
       tn=tn+1
       t[tn]=key..'='..yes
      elseif not strict then
       tn=tn+1
       t[tn]=key..'='..no
      end
     elseif value or not strict then
      tn=tn+1
      t[tn]=key..'='..tostring(value)
     end
    else
     tn=tn+1
     t[tn]=key..'='..value
    end
   end
  end
  return concat(t,separator or ",")
 else
  return ""
 end
end
function parsers.array_to_string(a,separator)
 if a then
  return concat(a,separator or ",")
 else
  return ""
 end
end
local pattern=Cf(Ct("")*Cg(C((1-S(", "))^1)*S(", ")^0*Cc(true))^1,rawset)
function parsers.settings_to_set(str)
 return str and lpegmatch(pattern,str) or {}
end
hashes.settings_to_set=table.setmetatableindex(function(t,k) 
 local v=k and lpegmatch(pattern,k) or {}
 t[k]=v
 return v
end)
function parsers.settings_to_set(str)
 return str and lpegmatch(pattern,str) or {}
end
local pattern=Ct((C((1-S(", "))^1)*S(", ")^0)^1)
hashes.settings_to_list=table.setmetatableindex(function(t,k) 
 local v=k and lpegmatch(pattern,k) or {}
 t[k]=v
 return v
end)
getmetatable(hashes.settings_to_set ).__mode="kv" 
getmetatable(hashes.settings_to_list).__mode="kv" 
function parsers.simple_hash_to_string(h,separator)
 local t={}
 local tn=0
 for k,v in sortedhash(h) do
  if v then
   tn=tn+1
   t[tn]=k
  end
 end
 return concat(t,separator or ",")
end
local str=Cs(lpegpatterns.unquoted)+C((1-whitespace-equal)^1)
local setting=Cf(Carg(1)*(whitespace^0*Cg(str*whitespace^0*(equal*whitespace^0*str+Cc(""))))^1,rawset)
local splitter=setting^1
function parsers.options_to_hash(str,target)
 return str and lpegmatch(splitter,str,1,target or {}) or {}
end
local splitter=lpeg.tsplitat(" ")
function parsers.options_to_array(str)
 return str and lpegmatch(splitter,str) or {}
end
local value=P(lbrace*C((nobrace+nestedbraces)^0)*rbrace)+C(digit^1*lparent*(noparent+nestedparents)^1*rparent)+C((nestedbraces+(1-comma))^1)
local pattern_a=spaces*Ct(value*(separator*value)^0)
local function repeater(n,str)
 if not n then
  return str
 else
  local s=lpegmatch(pattern_a,str)
  if n==1 then
   return unpack(s)
  else
   local t={}
   local tn=0
   for i=1,n do
    for j=1,#s do
     tn=tn+1
     t[tn]=s[j]
    end
   end
   return unpack(t)
  end
 end
end
local value=P(lbrace*C((nobrace+nestedbraces)^0)*rbrace)+(C(digit^1)/tonumber*lparent*Cs((noparent+nestedparents)^1)*rparent)/repeater+C((nestedbraces+(1-comma))^1)
local pattern_b=spaces*Ct(value*(separator*value)^0)
function parsers.settings_to_array_with_repeat(str,expand) 
 if expand then
  return lpegmatch(pattern_b,str) or {}
 else
  return lpegmatch(pattern_a,str) or {}
 end
end
local value=lbrace*C((nobrace+nestedbraces)^0)*rbrace
local pattern=Ct((space+value)^0)
function parsers.arguments_to_table(str)
 return lpegmatch(pattern,str)
end
function parsers.getparameters(self,class,parentclass,settings)
 local sc=self[class]
 if not sc then
  sc={}
  self[class]=sc
  if parentclass then
   local sp=self[parentclass]
   if not sp then
    sp={}
    self[parentclass]=sp
   end
   setmetatableindex(sc,sp)
  end
 end
 parsers.settings_to_hash(settings,sc)
end
function parsers.listitem(str)
 return gmatch(str,"[^, ]+")
end
local pattern=Cs { "start",
 start=V("one")+V("two")+V("three"),
 rest=(Cc(",")*V("thousand"))^0*(P(".")+endofstring)*anything^0,
 thousand=digit*digit*digit,
 one=digit*V("rest"),
 two=digit*digit*V("rest"),
 three=V("thousand")*V("rest"),
}
lpegpatterns.splitthousands=pattern 
function parsers.splitthousands(str)
 return lpegmatch(pattern,str) or str
end
local optionalwhitespace=whitespace^0
lpegpatterns.words=Ct((Cs((1-punctuation-whitespace)^1)+anything)^1)
lpegpatterns.sentences=Ct((optionalwhitespace*Cs((1-period)^0*period))^1)
lpegpatterns.paragraphs=Ct((optionalwhitespace*Cs((whitespace^1*endofstring/""+1-(spacer^0*newline*newline))^1))^1)
local dquote=P('"')
local equal=P('=')
local escape=P('\\')
local separator=S(' ,')
local key=C((1-equal)^1)
local value=dquote*C((1-dquote-escape*dquote)^0)*dquote
local pattern=Cf(Ct("")*(Cg(key*equal*value)*separator^0)^1,rawset)^0*P(-1)
function parsers.keq_to_hash(str)
 if str and str~="" then
  return lpegmatch(pattern,str)
 else
  return {}
 end
end
local defaultspecification={ separator=",",quote='"' }
function parsers.csvsplitter(specification)
 specification=specification and setmetatableindex(specification,defaultspecification) or defaultspecification
 local separator=specification.separator
 local quotechar=specification.quote
 local numbers=specification.numbers
 local separator=S(separator~="" and separator or ",")
 local whatever=C((1-separator-newline)^0)
 if quotechar and quotechar~="" then
  local quotedata=nil
  for chr in gmatch(quotechar,".") do
   local quotechar=P(chr)
   local quoteitem=(1-quotechar)^0
   local quoteword=quotechar*(numbers and (quoteitem/tonumber) or C(quoteitem))*quotechar
   if quotedata then
    quotedata=quotedata+quoteword
   else
    quotedata=quoteword
   end
  end
  whatever=quotedata+whatever
 end
 local parser=Ct((Ct(whatever*(separator*whatever)^0)*S("\n\r")^1)^0 )
 return function(data)
  return lpegmatch(parser,data)
 end
end
function parsers.rfc4180splitter(specification)
 specification=specification and setmetatableindex(specification,defaultspecification) or defaultspecification
 local numbers=specification.numbers
 local separator=specification.separator 
 local quotechar=P(specification.quote)  
 local dquotechar=quotechar*quotechar   
/specification.quote
 local separator=S(separator~="" and separator or ",")
 local whatever=(dquotechar+(1-quotechar))^0
 local escaped=quotechar*(numbers and (whatever/tonumber) or Cs(whatever))*quotechar
 local non_escaped=C((1-quotechar-newline-separator)^1)
 local field=escaped+non_escaped+Cc("")
 local record=Ct(field*(separator*field)^1)
 local headerline=record*Cp()
 local morerecords=(newline^(specification.strict and -1 or 1)*record)^0
 local headeryes=Ct(morerecords)
 local headernop=Ct(record*morerecords)
 return function(data,getheader)
  if getheader then
   local header,position=lpegmatch(headerline,data)
   local data=lpegmatch(headeryes,data,position)
   return data,header
  else
   return lpegmatch(headernop,data)
  end
 end
end
local function ranger(first,last,n,action)
 if not first then
 elseif last==true then
  for i=first,n or first do
   action(i)
  end
 elseif last then
  for i=first,last do
   action(i)
  end
 else
  action(first)
 end
end
local cardinal=(lpegpatterns.hexadecimal+lpegpatterns.cardinal)/tonumber
local spacers=lpegpatterns.spacer^0
local endofstring=lpegpatterns.endofstring
local stepper=spacers*(cardinal*(spacers*S(":-")*spacers*(cardinal+Cc(true) )+Cc(false) )*Carg(1)*Carg(2)/ranger*S(", ")^0 )^1
local stepper=spacers*(cardinal*(spacers*S(":-")*spacers*(cardinal+(P("*")+endofstring)*Cc(true) )+Cc(false) )*Carg(1)*Carg(2)/ranger*S(", ")^0 )^1*endofstring 
function parsers.stepper(str,n,action)
 local ts=type(str)
 if type(n)=="function" then
  if ts=="number" then
   n(str)
  elseif ts=="table" then
   for i=1,#str do
    n(str[i])
   end
  else
   lpegmatch(stepper,str,1,false,n or print)
  end
 elseif ts=="string" then
  lpegmatch(stepper,str,1,n,action or print)
 end
end
local pattern_math=Cs((P("%")/"\\percent "+P("^")*Cc("{")*lpegpatterns.integer*Cc("}")+anything)^0)
local pattern_text=Cs((P("%")/"\\percent "+(P("^")/"\\high")*Cc("{")*lpegpatterns.integer*Cc("}")+anything)^0)
patterns.unittotex=pattern
function parsers.unittotex(str,textmode)
 return lpegmatch(textmode and pattern_text or pattern_math,str)
end
local pattern=Cs((P("^")/"<sup>"*lpegpatterns.integer*Cc("</sup>")+anything)^0)
function parsers.unittoxml(str)
 return lpegmatch(pattern,str)
end
local cache={}
local spaces=lpegpatterns.space^0
local dummy=function() end
setmetatableindex(cache,function(t,k)
 local separator=S(k) 
 local value=(1-separator)^0
 local pattern=spaces*C(value)*separator^0*Cp()
 t[k]=pattern
 return pattern
end)
local commalistiterator=cache[","]
function parsers.iterator(str,separator)
 local n=#str
 if n==0 then
  return dummy
 else
  local pattern=separator and cache[separator] or commalistiterator
  local p=1
  return function()
   if p<=n then
    local s,e=lpegmatch(pattern,str,p)
    if e then
     p=e
     return s
    end
   end
  end
 end
end
local function initialize(t,name)
 local source=t[name]
 if source then
  local result={}
  for k,v in next,t[name] do
   result[k]=v
  end
  return result
 else
  return {}
 end
end
local function fetch(t,name)
 return t[name] or {}
end
local function process(result,more)
 for k,v in next,more do
  result[k]=v
 end
 return result
end
local name=C((1-S(", "))^1)
local parser=(Carg(1)*name/initialize)*(S(", ")^1*(Carg(1)*name/fetch))^0
local merge=Cf(parser,process)
function parsers.mergehashes(hash,list)
 return lpegmatch(merge,list,1,hash)
end
function parsers.runtime(time)
 if not time then
  time=os.runtime()
 end
 local days=div(time,24*60*60)
 time=mod(time,24*60*60)
 local hours=div(time,60*60)
 time=mod(time,60*60)
 local minutes=div(time,60)
 local seconds=mod(time,60)
 return days,hours,minutes,seconds
end
local spacing=whitespace^0
local apply=P("->")
local method=C((1-apply)^1)
local token=lbrace*C((1-rbrace)^1)*rbrace+C(anything^1)
local pattern=spacing*(method*spacing*apply+Carg(1))*spacing*token
function parsers.splitmethod(str,default)
 if str then
  return lpegmatch(pattern,str,1,default or false)
 else
  return default or false,""
 end
end
local p_year=lpegpatterns.digit^4/tonumber
local pattern=Cf(Ct("")*(
  (Cg(Cc("year")*p_year)*S("-/")*Cg(Cc("month")*cardinal)*S("-/")*Cg(Cc("day")*cardinal)
  )+(Cg(Cc("day")*cardinal)*S("-/")*Cg(Cc("month")*cardinal)*S("-/")*Cg(Cc("year")*p_year)
  )+(Cg(Cc("year")*p_year)*S("-/")*Cg(Cc("month")*cardinal)
  )+(Cg(Cc("month")*cardinal)*S("-/")*Cg(Cc("year")*p_year)
  )
 )*(
   P(" ")*Cg(Cc("hour")*cardinal)*P(":")*Cg(Cc("min")*cardinal)*(P(":")*Cg(Cc("sec")*cardinal))^-1+P(-1) )
,rawset)
lpegpatterns.splittime=pattern
function parsers.totime(str)
 return lpegmatch(pattern,str)
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-dim']={
 version=1.001,
 comment="support for dimensions",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local format,match,gsub,type,setmetatable=string.format,string.match,string.gsub,type,setmetatable
local P,S,R,Cc,C,lpegmatch=lpeg.P,lpeg.S,lpeg.R,lpeg.Cc,lpeg.C,lpeg.match
local allocate=utilities.storage.allocate
local setmetatableindex=table.setmetatableindex
local formatters=string.formatters
local texget=tex and tex.get or function() return 65536*10*100 end
local p_stripzeros=lpeg.patterns.stripzeros
number=number or {}
local number=number
number.tonumberf=function(n) return lpegmatch(p_stripzeros,format("%.20f",n)) end
number.tonumberg=function(n) return format("%.20g",n) end
local dimenfactors=allocate {
 ["pt"]=1/65536,
 ["in"]=(100/7227)/65536,
 ["cm"]=(254/7227)/65536,
 ["mm"]=(2540/7227)/65536,
 ["sp"]=1,
 ["bp"]=(7200/7227)/65536,
 ["pc"]=(1/12)/65536,
 ["dd"]=(1157/1238)/65536,
 ["cc"]=(1157/14856)/65536,
 ["es"]=(9176/129)/65536,
 ["ts"]=(4588/645)/65536,
}
local f_none=formatters["%s%s"]
local f_true=formatters["%0.5F%s"]
local function numbertodimen(n,unit,fmt) 
 if type(n)=='string' then
  return n
 else
  unit=unit or 'pt'
  n=n*dimenfactors[unit]
  if not fmt then
   fmt=f_none(n,unit)
  elseif fmt==true then
   fmt=f_true(n,unit)
  else
   return formatters[fmt](n,unit)
  end
 end
end
number.maxdimen=1073741823
number.todimen=numbertodimen
number.dimenfactors=dimenfactors
function number.topoints   (n,fmt) return numbertodimen(n,"pt",fmt) end
function number.toinches   (n,fmt) return numbertodimen(n,"in",fmt) end
function number.tocentimeters (n,fmt) return numbertodimen(n,"cm",fmt) end
function number.tomillimeters (n,fmt) return numbertodimen(n,"mm",fmt) end
function number.toscaledpoints(n)  return   n.."sp"   end
function number.tobasepoints  (n,fmt) return numbertodimen(n,"bp",fmt) end
function number.topicas    (n,fmt) return numbertodimen(n "pc",fmt) end
function number.todidots   (n,fmt) return numbertodimen(n,"dd",fmt) end
function number.tociceros  (n,fmt) return numbertodimen(n,"cc",fmt) end
function number.toediths   (n,fmt) return numbertodimen(n,"es",fmt) end
function number.totoves    (n,fmt) return numbertodimen(n,"ts",fmt) end
local amount=(S("+-")^0*R("09")^0*P(".")^0*R("09")^0)+Cc("0")
local unit=R("az")^1+P("%")
local dimenpair=amount/tonumber*(unit^1/dimenfactors+Cc(1)) 
lpeg.patterns.dimenpair=dimenpair
local splitter=amount/tonumber*C(unit^1)
function number.splitdimen(str)
 return lpegmatch(splitter,str)
end
setmetatableindex(dimenfactors,function(t,s)
 return false
end)
local stringtodimen 
local amount=S("+-")^0*R("09")^0*S(".,")^0*R("09")^0
local unit=P("pt")+P("cm")+P("mm")+P("sp")+P("bp")+P("es")+P("ts")+P("pc")+P("dd")+P("cc")+P("in")
local validdimen=amount*unit
lpeg.patterns.validdimen=validdimen
local dimensions={}
function dimensions.__add(a,b)
 local ta,tb=type(a),type(b)
 if ta=="string" then a=stringtodimen(a) elseif ta=="table" then a=a[1] end
 if tb=="string" then b=stringtodimen(b) elseif tb=="table" then b=b[1] end
 return setmetatable({ a+b },dimensions)
end
function dimensions.__sub(a,b)
 local ta,tb=type(a),type(b)
 if ta=="string" then a=stringtodimen(a) elseif ta=="table" then a=a[1] end
 if tb=="string" then b=stringtodimen(b) elseif tb=="table" then b=b[1] end
 return setmetatable({ a-b },dimensions)
end
function dimensions.__mul(a,b)
 local ta,tb=type(a),type(b)
 if ta=="string" then a=stringtodimen(a) elseif ta=="table" then a=a[1] end
 if tb=="string" then b=stringtodimen(b) elseif tb=="table" then b=b[1] end
 return setmetatable({ a*b },dimensions)
end
function dimensions.__div(a,b)
 local ta,tb=type(a),type(b)
 if ta=="string" then a=stringtodimen(a) elseif ta=="table" then a=a[1] end
 if tb=="string" then b=stringtodimen(b) elseif tb=="table" then b=b[1] end
 return setmetatable({ a/b },dimensions)
end
function dimensions.__unm(a)
 local ta=type(a)
 if ta=="string" then a=stringtodimen(a) elseif ta=="table" then a=a[1] end
 return setmetatable({-a },dimensions)
end
function dimensions.__lt(a,b)
 return a[1]<b[1]
end
function dimensions.__eq(a,b)
 return a[1]==b[1]
end
function dimensions.__tostring(a)
 return a[1]/65536 .."pt" 
end
function dimensions.__index(tab,key)
 local d=dimenfactors[key]
 if not d then
  error("illegal property of dimen: "..key)
  d=1
 end
 return 1/d
end
   dimenfactors["ex"]=4/65536 
   dimenfactors["em"]=10/65536
   dimenfactors["eu"]=(9176/129)/65536
local known={} setmetatable(known,{ __mode="v" })
function dimen(a)
 if a then
  local ta=type(a)
  if ta=="string" then
   local k=known[a]
   if k then
    a=k
   else
    local value,unit=lpegmatch(dimenpair,a)
    if value and unit then
     k=value/unit 
    else
     k=0
    end
    known[a]=k
    a=k
   end
  elseif ta=="table" then
   a=a[1]
  end
  return setmetatable({ a },dimensions)
 else
  return setmetatable({ 0 },dimensions)
 end
end
function string.todimen(str) 
 local t=type(str)
 if t=="number" then
  return str
 else
  local k=known[str]
  if not k then
   if t=="string" then
    local value,unit=lpegmatch(dimenpair,str)
    if value and unit then
     k=value/unit 
    else
     k=0
    end
   else
    k=0
   end
   known[str]=k
  end
  return k
 end
end
stringtodimen=string.todimen 
function number.toscaled(d)
 return format("%0.5f",d/0x10000) 
end
function number.percent(n,d) 
 d=d or texget("hsize")
 if type(d)=="string" then
  d=stringtodimen(d)
 end
 return (n/100)*d
end
number["%"]=number.percent

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-jsn']={
 version=1.001,
 comment="companion to m-json.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
if utilities and utilities.json then
 return json
end
local P,V,R,S,C,Cc,Cs,Ct,Cf,Cg=lpeg.P,lpeg.V,lpeg.R,lpeg.S,lpeg.C,lpeg.Cc,lpeg.Cs,lpeg.Ct,lpeg.Cf,lpeg.Cg
local lpegmatch=lpeg.match
local format,gsub=string.format,string.gsub
local formatters=string.formatters
local utfchar=utf.char
local concat,sortedkeys=table.concat,table.sortedkeys
local tonumber,tostring,rawset,type,next=tonumber,tostring,rawset,type,next
local json=utilities.json or {}
utilities.json=json
do
 local lbrace=P("{")
 local rbrace=P("}")
 local lparent=P("[")
 local rparent=P("]")
 local comma=P(",")
 local colon=P(":")
 local dquote=P('"')
 local whitespace=lpeg.patterns.whitespace
 local optionalws=whitespace^0
 local escapes={
  ["b"]="\010",
  ["f"]="\014",
  ["n"]="\n",
  ["r"]="\r",
  ["t"]="\t",
 }
 local escape_un=P("\\u")/""*(C(R("09","AF","af")^-4)/function(s)
  return utfchar(tonumber(s,16))
 end)
 local escape_bs=P([[\]])/""*(P(1)/escapes) 
 local jstring=dquote*Cs((escape_un+escape_bs+(1-dquote))^0)*dquote
 local jtrue=P("true")*Cc(true)
 local jfalse=P("false")*Cc(false)
 local jnull=P("null")*Cc(nil)
 local jnumber=(1-whitespace-rparent-rbrace-comma)^1/tonumber
 local key=jstring
 local jsonconverter={ "value",
  hash=lbrace*Cf(Ct("")*(V("pair")*(comma*V("pair"))^0+optionalws),rawset)*rbrace,
  pair=Cg(optionalws*key*optionalws*colon*V("value")),
  array=Ct(lparent*(V("value")*(comma*V("value"))^0+optionalws)*rparent),
  value=optionalws*(jstring+V("hash")+V("array")+jtrue+jfalse+jnull+jnumber)*optionalws,
 }
 function json.tolua(str)
  return lpegmatch(jsonconverter,str)
 end
 function json.load(filename)
  local data=io.loaddata(filename)
  if data then
   return lpegmatch(jsonconverter,data)
  end
 end
end
do
 local escaper
 local f_start_hash=formatters[   '%w{' ]
 local f_start_array=formatters[   '%w[' ]
 local f_start_hash_new=formatters[ "\n"..'%w{' ]
 local f_start_array_new=formatters[ "\n"..'%w[' ]
 local f_start_hash_key=formatters[ "\n"..'%w"%s" : {' ]
 local f_start_array_key=formatters[ "\n"..'%w"%s" : [' ]
 local f_stop_hash=formatters[ "\n"..'%w}' ]
 local f_stop_array=formatters[ "\n"..'%w]' ]
 local f_key_val_seq=formatters[ "\n"..'%w"%s" : %s' ]
 local f_key_val_str=formatters[ "\n"..'%w"%s" : "%s"'  ]
 local f_key_val_num=f_key_val_seq
 local f_key_val_yes=formatters[ "\n"..'%w"%s" : true'  ]
 local f_key_val_nop=formatters[ "\n"..'%w"%s" : false' ]
 local f_key_val_null=formatters[ "\n"..'%w"%s" : null'  ]
 local f_val_num=formatters[ "\n"..'%w%s' ]
 local f_val_str=formatters[ "\n"..'%w"%s"'  ]
 local f_val_yes=formatters[ "\n"..'%wtrue'  ]
 local f_val_nop=formatters[ "\n"..'%wfalse' ]
 local f_val_null=formatters[ "\n"..'%wnull'  ]
 local f_val_empty=formatters[ "\n"..'%w{ }'  ]
 local f_val_seq=f_val_num
 local t={}
 local n=0
 local function is_simple_table(tt) 
  local l=#tt
  if l>0 then
   for i=1,l do
    if type(tt[i])=="table" then
     return false
    end
   end
   local nn=n
   n=n+1 t[n]="[ "
   for i=1,l do
    if i>1 then
     n=n+1 t[n]=", "
    end
    local v=tt[i]
    local tv=type(v)
    if tv=="number" then
     n=n+1 t[n]=v
    elseif tv=="string" then
     n=n+1 t[n]='"'
     n=n+1 t[n]=lpegmatch(escaper,v) or v
     n=n+1 t[n]='"'
    elseif tv=="boolean" then
     n=n+1 t[n]=v and "true" or "false"
    elseif v then
     n=n+1 t[n]=tostring(v)
    else
     n=n+1 t[n]="null"
    end
   end
   n=n+1 t[n]=" ]"
   local s=concat(t,"",nn+1,n)
   n=nn
   return s
  end
  return false
 end
 local function tojsonpp(root,name,depth,level,size)
  if root then
   local indexed=size>0
   n=n+1
   if level==0 then
    if indexed then
     t[n]=f_start_array(depth)
    else
     t[n]=f_start_hash(depth)
    end
   elseif name then
    if tn=="string" then
     name=lpegmatch(escaper,name) or name
    elseif tn~="number" then
     name=tostring(name)
    end
    if indexed then
     t[n]=f_start_array_key(depth,name)
    else
     t[n]=f_start_hash_key(depth,name)
    end
   else
    if indexed then
     t[n]=f_start_array_new(depth)
    else
     t[n]=f_start_hash_new(depth)
    end
   end
   depth=depth+1
   if indexed then 
    for i=1,size do
     if i>1 then
      n=n+1 t[n]=","
     end
     local v=root[i]
     local tv=type(v)
     if tv=="number" then
      n=n+1 t[n]=f_val_num(depth,v)
     elseif tv=="string" then
      v=lpegmatch(escaper,v) or v
      n=n+1 t[n]=f_val_str(depth,v)
     elseif tv=="table" then
      if next(v) then
       local st=is_simple_table(v)
       if st then
        n=n+1 t[n]=f_val_seq(depth,st)
       else
        tojsonpp(v,nil,depth,level+1,#v)
       end
      else
       n=n+1
       t[n]=f_val_empty(depth)
      end
     elseif tv=="boolean" then
      n=n+1
      if v then
       t[n]=f_val_yes(depth,v)
      else
       t[n]=f_val_nop(depth,v)
      end
     else
      n=n+1
      t[n]=f_val_null(depth)
     end
    end
   elseif next(root) then
    local sk=sortedkeys(root)
    for i=1,#sk do
     if i>1 then
      n=n+1 t[n]=","
     end
     local k=sk[i]
     local v=root[k]
     local tv=type(v)
     local tk=type(k)
     if tv=="number" then
      if tk=="number" then
       n=n+1 t[n]=f_key_val_num(depth,k,v)
      elseif tk=="string" then
       k=lpegmatch(escaper,k) or k
       n=n+1 t[n]=f_key_val_num(depth,k,v)
      end
     elseif tv=="string" then
      if tk=="number" then
       v=lpegmatch(escaper,v) or v
       n=n+1 t[n]=f_key_val_str(depth,k,v)
      elseif tk=="string" then
       k=lpegmatch(escaper,k) or k
       v=lpegmatch(escaper,v) or v
       n=n+1 t[n]=f_key_val_str(depth,k,v)
      elseif i>1 then
       n=n-1
      end
     elseif tv=="table" then
      local l=#v
      if l>0 then
       local st=is_simple_table(v)
       if not st then
        tojsonpp(v,k,depth,level+1,l)
       elseif tk=="number" then
        n=n+1 t[n]=f_key_val_seq(depth,k,st)
       elseif tk=="string" then
        k=lpegmatch(escaper,k) or k
        n=n+1 t[n]=f_key_val_seq(depth,k,st)
       end
      elseif next(v) then
       tojsonpp(v,k,depth,level+1,0)
      elseif i>1 then
       n=n-1
      end
     elseif tv=="boolean" then
      if tk=="number" then
       n=n+1
       if v then
        t[n]=f_key_val_yes(depth,k)
       else
        t[n]=f_key_val_nop(depth,k)
       end
      elseif tk=="string" then
       k=lpegmatch(escaper,k) or k
       n=n+1
       if v then
        t[n]=f_key_val_yes(depth,k)
       else
        t[n]=f_key_val_nop(depth,k)
       end
      elseif i>1 then
       n=n-1
      end
     else
      if tk=="number" then
       n=n+1
       t[n]=f_key_val_null(depth,k)
      elseif tk=="string" then
       k=lpegmatch(escaper,k) or k
       n=n+1
       t[n]=f_key_val_null(depth,k)
      elseif i>1 then
       n=n-1
      end
     end
    end
   end
   n=n+1
   if indexed then
    t[n]=f_stop_array(depth-1)
   else
    t[n]=f_stop_hash(depth-1)
   end
  end
 end
 local function tojson(value,n)
  local kind=type(value)
  if kind=="table" then
   local done=false
   local size=#value
   if size==0 then
    for k,v in next,value do
     if done then
      n=n+1;t[n]=',"'
     else
      n=n+1;t[n]='{"'
      done=true
     end
     n=n+1;t[n]=lpegmatch(escaper,k) or k
     n=n+1;t[n]='":'
     t,n=tojson(v,n)
    end
    if done then
     n=n+1;t[n]="}"
    else
     n=n+1;t[n]="{}"
    end
   elseif size==1 then
    n=n+1;t[n]="["
    t,n=tojson(value[1],n)
    n=n+1;t[n]="]"
   else
    for i=1,size do
     if done then
      n=n+1;t[n]=","
     else
      n=n+1;t[n]="["
      done=true
     end
     t,n=tojson(value[i],n)
    end
    n=n+1;t[n]="]"
   end
  elseif kind=="string"  then
   n=n+1;t[n]='"'
   n=n+1;t[n]=lpegmatch(escaper,value) or value
   n=n+1;t[n]='"'
  elseif kind=="number" then
   n=n+1;t[n]=value
  elseif kind=="boolean" then
   n=n+1;t[n]=tostring(value)
  else
   n=n+1;t[n]="null"
  end
  return t,n
 end
 local function jsontostring(value,pretty)
  local kind=type(value)
  if kind=="table" then
   if not escaper then
    local escapes={
     ["\\"]="\\u005C",
     ["\""]="\\u0022",
    }
    for i=0,0x1F do
     escapes[utfchar(i)]=format("\\u%04X",i)
    end
    escaper=Cs((
     (R('\0\x20')+S('\"\\'))/escapes+P(1)
    )^1 )
   end
   t={}
   n=0
   if pretty then
    tojsonpp(value,name,0,0,#value)
    value=concat(t,"",1,n)
   else
    t,n=tojson(value,0)
    value=concat(t,"",1,n)
   end
   t=nil
   n=0
   return value
  elseif kind=="string" or kind=="number" then
   return lpegmatch(escaper,value) or value
  else
   return tostring(value)
  end
 end
 json.tostring=jsontostring
 function json.tojson(value)
  return jsontostring(value,true)
 end
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['trac-inf']={
 version=1.001,
 comment="companion to trac-inf.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local type,tonumber,select=type,tonumber,select
local format,lower,find=string.format,string.lower,string.find
local concat=table.concat
local clock=os.gettimeofday or os.clock 
local setmetatableindex=table.setmetatableindex
local serialize=table.serialize
local formatters=string.formatters
statistics=statistics or {}
local statistics=statistics
statistics.enable=true
statistics.threshold=0.01
local statusinfo,n,registered,timers={},0,{},{}
setmetatableindex(timers,function(t,k)
 local v={ timing=0,loadtime=0,offset=0 }
 t[k]=v
 return v
end)
local function hastiming(instance)
 return instance and timers[instance]
end
local function resettiming(instance)
 timers[instance or "notimer"]={ timing=0,loadtime=0,offset=0 }
end
local ticks=clock
local seconds=function(n) return n or 0 end
if os.type~="windows" then
elseif lua.getpreciseticks then
 ticks=lua.getpreciseticks
 seconds=lua.getpreciseseconds
elseif FFISUPPORTED then
 local okay,kernel=pcall(ffi.load,"kernel32")
 if kernel then
  local tonumber=ffi.number or tonumber
  ffi.cdef[[
            int QueryPerformanceFrequency(int64_t *lpFrequency);
            int QueryPerformanceCounter(int64_t *lpPerformanceCount);
        ]]
  local target=ffi.new("__int64[1]")
  ticks=function()
   if kernel.QueryPerformanceCounter(target)==1 then
    return tonumber(target[0])
   else
    return 0
   end
  end
  local target=ffi.new("__int64[1]")
  seconds=function(ticks)
   if kernel.QueryPerformanceFrequency(target)==1 then
    return ticks/tonumber(target[0])
   else
    return 0
   end
  end
 end
else
end
local function starttiming(instance,reset)
 local timer=timers[instance or "notimer"]
 local it=timer.timing
 if reset then
  it=0
  timer.loadtime=0
 end
 if it==0 then
  timer.starttime=ticks()
  if not timer.loadtime then
   timer.loadtime=0
  end
 end
 timer.timing=it+1
end
local function stoptiming(instance)
 local timer=timers[instance or "notimer"]
 local it=timer.timing
 if it>1 then
  timer.timing=it-1
 else
  local starttime=timer.starttime
  if starttime and starttime>0 then
   local stoptime=ticks()
   local loadtime=stoptime-starttime
   timer.stoptime=stoptime
   timer.loadtime=timer.loadtime+loadtime
   timer.timing=0
   timer.starttime=0
  end
 end
end
local function benchmarktimer(instance)
 local timer=timers[instance or "notimer"]
 local it=timer.timing
 if it>1 then
  timer.timing=it-1
 else
  local starttime=timer.starttime
  if starttime and starttime>0 then
   timer.offset=ticks()-starttime
  else
   timer.offset=0
  end
 end
end
local function elapsed(instance)
 if type(instance)=="number" then
  return instance
 else
  local timer=timers[instance or "notimer"]
  return timer and seconds(timer.loadtime-2*(timer.offset or 0)) or 0
 end
end
local function currenttime(instance)
 if type(instance)=="number" then
  return instance
 else
  local timer=timers[instance or "notimer"]
  local it=timer.timing
  if it>1 then
  else
   local starttime=timer.starttime
   if starttime and starttime>0 then
    return seconds(timer.loadtime+ticks()-starttime-2*(timer.offset or 0))
   end
  end
  return 0
 end
end
local function elapsedtime(instance)
 return format("%0.3f",elapsed(instance))
end
local function elapsedindeed(instance)
 return elapsed(instance)>statistics.threshold
end
local function elapsedseconds(instance,rest) 
 if elapsedindeed(instance) then
  return format("%0.3f seconds %s",elapsed(instance),rest or "")
 end
end
statistics.hastiming=hastiming
statistics.resettiming=resettiming
statistics.starttiming=starttiming
statistics.stoptiming=stoptiming
statistics.currenttime=currenttime
statistics.elapsed=elapsed
statistics.elapsedtime=elapsedtime
statistics.elapsedindeed=elapsedindeed
statistics.elapsedseconds=elapsedseconds
statistics.benchmarktimer=benchmarktimer
function statistics.register(tag,fnc)
 if statistics.enable and type(fnc)=="function" then
  local rt=registered[tag] or (#statusinfo+1)
  statusinfo[rt]={ tag,fnc }
  registered[tag]=rt
  if #tag>n then n=#tag end
 end
end
local report=logs.reporter("mkiv lua stats")
function statistics.show()
 if statistics.enable then
  local register=statistics.register
  register("used platform",function()
   return format("%s, type: %s, binary subtree: %s",
    os.platform or "unknown",os.type or "unknown",environment.texos or "unknown")
  end)
  register("used engine",function()
   return format("%s version: %s, functionality level: %s, banner: %s",
    LUATEXENGINE,LUATEXVERSION,LUATEXFUNCTIONALITY,lower(status.banner))
  end)
  register("used hash slots",function()
   return format("%s of %s + %s",status.cs_count,status.hash_size,status.hash_extra)
  end)
  register("callbacks",statistics.callbacks)
  if JITSUPPORTED then
   local jitstatus=jit.status
   if jitstatus then
    local jitstatus={ jitstatus() }
    if jitstatus[1] then
     register("luajit options",concat(jitstatus," ",2))
    end
   end
  end
  register("lua properties",function()
   local hash=2^status.luatex_hashchars
   local mask=load([[τεχ = 1]]) and "utf" or "ascii"
   return format("engine: %s %s, used memory: %s, hash chars: min(%i,40), symbol mask: %s (%s)",
    jit and "luajit" or "lua",LUAVERSION,statistics.memused(),hash,mask,mask=="utf" and "τεχ" or "tex")
  end)
  register("runtime",statistics.runtime)
  logs.newline() 
  for i=1,#statusinfo do
   local s=statusinfo[i]
   local r=s[2]()
   if r then
    report("%s: %s",s[1],r)
   end
  end
  statistics.enable=false
 end
end
function statistics.memused() 
 local round=math.round or math.floor
 return format("%s MB, ctx: %s MB, max: %s MB",
  round(collectgarbage("count")/1000),
  round(status.luastate_bytes/1000000),
  status.luastate_bytes_max and round(status.luastate_bytes_max/1000000) or "unknown"
 )
end
starttiming(statistics)
function statistics.formatruntime(runtime) 
 return format("%s seconds",runtime)   
end
function statistics.runtime()
 stoptiming(statistics)
 local runtime=lua.getruntime and lua.getruntime() or elapsedtime(statistics)
 return statistics.formatruntime(runtime)
end
local report=logs.reporter("system")
function statistics.timed(action,all)
 starttiming("run")
 action()
 stoptiming("run")
 local runtime=tonumber(elapsedtime("run"))
 if all then
  local alltime=tonumber(lua.getruntime and lua.getruntime() or elapsedtime(statistics))
  if alltime and alltime>0 then
   report("total runtime: %0.3f seconds of %0.3f seconds",runtime,alltime)
   return
  end
 end
 report("total runtime: %0.3f seconds",runtime)
end
function statistics.tracefunction(base,tag,...)
 for i=1,select("#",...) do
  local name=select(i,...)
  local stat={}
  local func=base[name]
  setmetatableindex(stat,function(t,k) t[k]=0 return 0 end)
  base[name]=function(n,k,v) stat[k]=stat[k]+1 return func(n,k,v) end
  statistics.register(formatters["%s.%s"](tag,name),function() return serialize(stat,"calls") end)
 end
end
function status.getreadstate()
 return {
  filename=status.filename   or "?",
  linenumber=status.linenumber or 0,
  iocode=status.inputid or 0,
 }
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-lua']={
 version=1.001,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 comment="the strip code is written by Peter Cawley",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local rep,sub,byte,dump,format=string.rep,string.sub,string.byte,string.dump,string.format
local load,loadfile,type,collectgarbage=load,loadfile,type,collectgarbage
utilities=utilities or {}
utilities.lua=utilities.lua or {}
local luautilities=utilities.lua
local report_lua=logs.reporter("system","lua")
local report_mem=logs.reporter("system","lua memory")
local tracestripping=false
local tracememory=false
luautilities.stripcode=true  
luautilities.alwaysstripcode=false 
luautilities.nofstrippedchunks=0
luautilities.nofstrippedbytes=0
local strippedchunks={} 
luautilities.strippedchunks=strippedchunks
if not LUATEXENGINE then
 LUATEXENGINE=status.luatex_engine and string.lower(status.luatex_engine)
 JITSUPPORTED=LUATEXENGINE=="luajittex" or jit
 CONTEXTLMTXMODE=CONTEXTLMTXMODE or (LUATEXENGINE=="luametatex" and 1) or 0
end
luautilities.suffixes={
 tma="tma",
 tmc=(CONTEXTLMTXMODE and CONTEXTLMTXMODE>0 and "tmd") or (jit and "tmb") or "tmc",
 lua="lua",
 luc=(CONTEXTLMTXMODE and CONTEXTLMTXMODE>0 and "lud") or (jit and "lub") or "luc",
 lui="lui",
 luv="luv",
 luj="luj",
 tua="tua",
 tuc=(CONTEXTLMTXMODE and CONTEXTLMTXMODE>0 and "tud") or (jit and "tub") or "tuc",
}
local function register(name) 
 if tracestripping then
  report_lua("stripped bytecode from %a",name or "unknown")
 end
 strippedchunks[#strippedchunks+1]=name
 luautilities.nofstrippedchunks=luautilities.nofstrippedchunks+1
end
local function stupidcompile(luafile,lucfile,strip)
 local code=io.loaddata(luafile)
 if code and code~="" then
  code=load(code)
  if code then
   code=dump(code,strip and luautilities.stripcode or luautilities.alwaysstripcode)
   if code and code~="" then
    register(name)
    io.savedata(lucfile,code)
    return true,0
   end
  else
   report_lua("fatal error %a in file %a",1,luafile)
  end
 else
  report_lua("fatal error %a in file %a",2,luafile)
 end
 return false,0
end
function luautilities.loadedluacode(fullname,forcestrip,name,macros)
 name=name or fullname
 if macros then
  macros=lua.macros
 end
 local code,message
 if macros then
  code,message=macros.loaded(fullname,true,false)
 else
  code,message=loadfile(fullname)
 end
 if code then
  code()
 else
  report_lua("loading of file %a failed:\n\t%s",fullname,message or "no message")
  code,message=loadfile(fullname)
 end
 if forcestrip and luautilities.stripcode then
  if type(forcestrip)=="function" then
   forcestrip=forcestrip(fullname)
  end
  if forcestrip or luautilities.alwaysstripcode then
   register(name)
   return load(dump(code,true)),0
  else
   return code,0
  end
 elseif luautilities.alwaysstripcode then
  register(name)
  return load(dump(code,true)),0
 else
  return code,0
 end
end
function luautilities.strippedloadstring(code,name,forcestrip) 
 local code,message=load(code)
 if not code then
  report_lua("loading of file %a failed:\n\t%s",name,message or "no message")
 end
 if forcestrip and luautilities.stripcode or luautilities.alwaysstripcode then
  register(name)
  return load(dump(code,true)),0 
 else
  return code,0
 end
end
function luautilities.loadstring(code,name) 
 local code,message=load(code)
 if not code then
  report_lua("loading of file %a failed:\n\t%s",name,message or "no message")
 end
 return code,0
end
function luautilities.compile(luafile,lucfile,cleanup,strip,fallback) 
 report_lua("compiling %a into %a",luafile,lucfile)
 os.remove(lucfile)
 local done=stupidcompile(luafile,lucfile,strip~=false)
 if done then
  report_lua("dumping %a into %a stripped",luafile,lucfile)
  if cleanup==true and lfs.isfile(lucfile) and lfs.isfile(luafile) then
   report_lua("removing %a",luafile)
   os.remove(luafile)
  end
 end
 return done
end
function luautilities.loadstripped(...)
 local l=load(...)
 if l then
  return load(dump(l,true))
 end
end
local finalizers={}
setmetatable(finalizers,{
 __gc=function(t)
  for i=1,#t do
   pcall(t[i]) 
  end
 end
} )
function luautilities.registerfinalizer(f)
 finalizers[#finalizers+1]=f
end
function luautilities.checkmemory(previous,threshold,trace) 
 local current=collectgarbage("count")
 if previous then
  local checked=(threshold or 64)*1024
  local delta=current-previous
  if current-previous>checked then
   collectgarbage("collect")
   local afterwards=collectgarbage("count")
   if trace or tracememory then
    report_mem("previous %r MB, current %r MB, delta %r MB, threshold %r MB, afterwards %r MB",
     previous/1024,current/1024,delta/1024,threshold,afterwards)
   end
   return afterwards
  elseif trace or tracememory then
   report_mem("previous %r MB, current %r MB, delta %r MB, threshold %r MB",
    previous/1024,current/1024,delta/1024,threshold)
  end
 end
 return current
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-deb']={
 version=1.001,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local type,next,tostring,tonumber=type,next,tostring,tonumber
local format,find,sub,gsub=string.format,string.find,string.sub,string.gsub
local insert,remove,sort=table.insert,table.remove,table.sort
local setmetatableindex=table.setmetatableindex
utilities=utilities or {}
local debugger=utilities.debugger or {}
utilities.debugger=debugger
local report=logs.reporter("debugger")
local ticks=os.gettimeofday or os.clock
local seconds=function(n) return n or 0 end
local overhead=0
local dummycalls=10*1000
local nesting=0
local names={}
local initialize=false
if lua.getpreciseticks then
 initialize=function()
  ticks=lua.getpreciseticks
  seconds=lua.getpreciseseconds
  initialize=false
 end
elseif not (FFISUPPORTED and ffi) then
elseif os.type=="windows" then
 initialize=function()
  local kernel=ffilib("kernel32","system") 
  if kernel then
   local tonumber=ffi.number or tonumber
   ffi.cdef[[
                int QueryPerformanceFrequency(int64_t *lpFrequency);
                int QueryPerformanceCounter(int64_t *lpPerformanceCount);
            ]]
   local target=ffi.new("__int64[1]")
   ticks=function()
    if kernel.QueryPerformanceCounter(target)==1 then
     return tonumber(target[0])
    else
     return 0
    end
   end
   local target=ffi.new("__int64[1]")
   seconds=function(ticks)
    if kernel.QueryPerformanceFrequency(target)==1 then
     return ticks/tonumber(target[0])
    else
     return 0
    end
   end
  end
  initialize=false
 end
elseif os.type=="unix" then
 initialize=function()
  local C=ffi.C
  local tonumber=ffi.number or tonumber
  ffi.cdef [[
            /* what a mess */
            typedef int clk_id_t;
            typedef enum { CLOCK_REALTIME, CLOCK_MONOTONIC, CLOCK_PROCESS_CPUTIME_ID } clk_id;
            typedef struct timespec { long sec; long nsec; } ctx_timespec;
            int clock_gettime(clk_id_t timerid, struct timespec *t);
        ]]
  local target=ffi.new("ctx_timespec[?]",1)
  local clock=C.CLOCK_PROCESS_CPUTIME_ID
  ticks=function ()
   C.clock_gettime(clock,target)
   return tonumber(target[0].sec*1000000000+target[0].nsec)
  end
  seconds=function(ticks)
   return ticks/1000000000
  end
  initialize=false
 end
end
setmetatableindex(names,function(t,name)
 local v=setmetatableindex(function(t,source)
  local v=setmetatableindex(function(t,line)
   local v={ total=0,count=0,nesting=0 }
   t[line]=v
   return v
  end)
  t[source]=v
  return v
 end)
 t[name]=v
 return v
end)
local getinfo=nil
local sethook=nil
local function hook(where)
 local f=getinfo(2,"nSl")
 if f then
  local source=f.short_src
  if not source then
   return
  end
  local line=f.linedefined or 0
  local name=f.name
  if not name then
   local what=f.what
   if what=="C" then
    name="<anonymous>"
   else
    name=f.namewhat or what or "<unknown>"
   end
  end
  local data=names[name][source][line]
  if where=="call" then
   local nesting=data.nesting
   if nesting==0 then
    data.count=data.count+1
    insert(data,ticks())
    data.nesting=1
   else
    data.nesting=nesting+1
   end
  elseif where=="return" then
   local nesting=data.nesting
   if nesting==1 then
    local t=remove(data)
    if t then
     data.total=data.total+ticks()-t
    end
    data.nesting=0
   else
    data.nesting=nesting-1
   end
  end
 end
end
function debugger.showstats(printer,threshold)
 local printer=printer or report
 local calls=0
 local functions=0
 local dataset={}
 local length=0
 local realtime=0
 local totaltime=0
 local threshold=threshold or 0
 for name,sources in next,names do
  for source,lines in next,sources do
   for line,data in next,lines do
    local count=data.count
    if count>threshold then
     if #name>length then
      length=#name
     end
     local total=data.total
     local real=total
     if real>0 then
      real=total-(count*overhead/dummycalls)
      if real<0 then
       real=0
      end
      realtime=realtime+real
     end
     totaltime=totaltime+total
     if line<0 then
      line=0
     end
     dataset[#dataset+1]={ real,total,count,name,source,line }
    end
   end
  end
 end
 sort(dataset,function(a,b)
  if a[1]==b[1] then
   if a[2]==b[2] then
    if a[3]==b[3] then
     if a[4]==b[4] then
      if a[5]==b[5] then
       return a[6]<b[6]
      else
       return a[5]<b[5]
      end
     else
      return a[4]<b[4]
     end
    else
     return b[3]<a[3]
    end
   else
    return b[2]<a[2]
   end
  else
   return b[1]<a[1]
  end
 end)
 if length>50 then
  length=50
 end
 local fmt=string.formatters["%4.9k s  %3.3k %%  %4.9k s  %3.3k %%  %8i #  %-"..length.."s  %4i  %s"]
 for i=1,#dataset do
  local data=dataset[i]
  local real=data[1]
  local total=data[2]
  local count=data[3]
  local name=data[4]
  local source=data[5]
  local line=data[6]
  calls=calls+count
  functions=functions+1
  name=gsub(name,"%s+"," ")
  if #name>length then
   name=sub(name,1,length)
  end
  printer(fmt(seconds(total),100*total/totaltime,seconds(real),100*real/realtime,count,name,line,source))
 end
 printer("")
 printer(format("functions : %i",functions))
 printer(format("calls     : %i",calls))
 printer(format("overhead  : %f",seconds(overhead/1000)))
end
local function getdebug()
 if sethook and getinfo then
  return
 end
 if not debug then
  local okay
  okay,debug=pcall(require,"debug")
 end
 if type(debug)~="table" then
  return
 end
 getinfo=debug.getinfo
 sethook=debug.sethook
 if type(getinfo)~="function" then
  getinfo=nil
 end
 if type(sethook)~="function" then
  sethook=nil
 end
end
function debugger.savestats(filename,threshold)
 local f=io.open(filename,'w')
 if f then
  debugger.showstats(function(str) f:write(str,"\n") end,threshold)
  f:close()
 end
end
function debugger.enable()
 getdebug()
 if sethook and getinfo and nesting==0 then
  running=true
  if initialize then
   initialize()
  end
  sethook(hook,"cr")
  local function dummy() end
  local t=ticks()
  for i=1,dummycalls do
   dummy()
  end
  overhead=ticks()-t
 end
 if nesting>0 then
  nesting=nesting+1
 end
end
function debugger.disable()
 if nesting>0 then
  nesting=nesting-1
 end
 if sethook and getinfo and nesting==0 then
  sethook()
 end
end
local function showtraceback(rep) 
 getdebug()
 if getinfo then
  local level=2 
  local reporter=rep or report
  while true do
   local info=getinfo(level,"Sl")
   if not info then
    break
   elseif info.what=="C" then
    reporter("%2i : %s",level-1,"C function")
   else
    reporter("%2i : %s : %s",level-1,info.short_src,info.currentline)
   end
   level=level+1
  end
 end
end
debugger.showtraceback=showtraceback
if luac then
 local show,dump=luac.print,string.dump
 function luac.inspect(v)
  if type(v)=="function" then
   local ok,str=xpcall(dump,function() end,v)
   if ok then
    v=str
   end
  end
  if type(v)=="string" then
   show(v,true)
  else
   print(v)
  end
 end
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-tpl']={
 version=1.001,
 comment="companion to luat-lib.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
utilities.templates=utilities.templates or {}
local templates=utilities.templates
local trace_template=false  trackers.register("templates.trace",function(v) trace_template=v end)
local report_template=logs.reporter("template")
local tostring,next=tostring,next
local format,sub,byte=string.format,string.sub,string.byte
local P,C,R,Cs,Cc,Carg,lpegmatch,lpegpatterns=lpeg.P,lpeg.C,lpeg.R,lpeg.Cs,lpeg.Cc,lpeg.Carg,lpeg.match,lpeg.patterns
local formatters=string.formatters
local replacer
local function replacekey(k,t,how,recursive)
 local v=t[k]
 if not v then
  if trace_template then
   report_template("unknown key %a",k)
  end
  return ""
 else
  v=tostring(v)
  if trace_template then
   report_template("setting key %a to value %a",k,v)
  end
  if recursive then
   return lpegmatch(replacer,v,1,t,how,recursive)
  else
   return v
  end
 end
end
local sqlescape=lpeg.replacer {
 { "'","''"   },
 { "\\","\\\\" },
 { "\r\n","\\n"  },
 { "\r","\\n"  },
}
local sqlquoted=Cs(Cc("'")*sqlescape*Cc("'"))
lpegpatterns.sqlescape=sqlescape
lpegpatterns.sqlquoted=sqlquoted
local luaescape=lpegpatterns.luaescape
local escapers={
 lua=function(s)
  return lpegmatch(luaescape,s)
 end,
 sql=function(s)
  return lpegmatch(sqlescape,s)
 end,
}
local quotedescapers={
 lua=function(s)
  return format("%q",s)
 end,
 sql=function(s)
  return lpegmatch(sqlquoted,s)
 end,
}
local luaescaper=escapers.lua
local quotedluaescaper=quotedescapers.lua
local function replacekeyunquoted(s,t,how,recurse) 
 if how==false then
  return replacekey(s,t,how,recurse)
 else
  local escaper=how and escapers[how] or luaescaper
  return escaper(replacekey(s,t,how,recurse))
 end
end
local function replacekeyquoted(s,t,how,recurse) 
 if how==false then
  return replacekey(s,t,how,recurse)
 else
  local escaper=how and quotedescapers[how] or quotedluaescaper
  return escaper(replacekey(s,t,how,recurse))
 end
end
local function replaceoptional(l,m,r,t,how,recurse)
 local v=t[l]
 return v and v~="" and lpegmatch(replacer,r,1,t,how or "lua",recurse or false) or ""
end
local function replaceformatted(l,m,r,t,how,recurse)
 local v=t[r]
 return v and formatters[l](v)
end
local single=P("%")  
local double=P("%%") 
local lquoted=P("%[") 
local rquoted=P("]%") 
local lquotedq=P("%(") 
local rquotedq=P(")%") 
local escape=double/'%%'
local nosingle=single/''
local nodouble=double/''
local nolquoted=lquoted/''
local norquoted=rquoted/''
local nolquotedq=lquotedq/''
local norquotedq=rquotedq/''
local nolformatted=P(":")/"%%"
local norformatted=P(":")/""
local noloptional=P("%?")/''
local noroptional=P("?%")/''
local nomoptional=P(":")/''
local args=Carg(1)*Carg(2)*Carg(3)
local key=nosingle*((C((1-nosingle)^1)*args)/replacekey)*nosingle
local quoted=nolquotedq*((C((1-norquotedq)^1)*args)/replacekeyquoted)*norquotedq
local unquoted=nolquoted*((C((1-norquoted)^1)*args)/replacekeyunquoted)*norquoted
local optional=noloptional*((C((1-nomoptional)^1)*nomoptional*C((1-noroptional)^1)*args)/replaceoptional)*noroptional
local formatted=nosingle*((Cs(nolformatted*(1-norformatted )^1)*norformatted*C((1-nosingle)^1)*args)/replaceformatted)*nosingle
local any=P(1)
   replacer=Cs((unquoted+quoted+formatted+escape+optional+key+any)^0)
local function replace(str,mapping,how,recurse)
 if mapping and str then
  return lpegmatch(replacer,str,1,mapping,how or "lua",recurse or false) or str
 else
  return str
 end
end
templates.replace=replace
function templates.replacer(str,how,recurse) 
 return function(mapping)
  return lpegmatch(replacer,str,1,mapping,how or "lua",recurse or false) or str
 end
end
function templates.load(filename,mapping,how,recurse)
 local data=io.loaddata(filename) or ""
 if mapping and next(mapping) then
  return replace(data,mapping,how,recurse)
 else
  return data
 end
end
function templates.resolve(t,mapping,how,recurse)
 if not mapping then
  mapping=t
 end
 for k,v in next,t do
  t[k]=replace(v,mapping,how,recurse)
 end
 return t
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-sta']={
 version=1.001,
 comment="companion to util-ini.mkiv",
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local insert,remove,fastcopy,concat=table.insert,table.remove,table.fastcopy,table.concat
local format=string.format
local select,tostring=select,tostring
local trace_stacker=false  trackers.register("stacker.resolve",function(v) trace_stacker=v end)
local stacker=stacker or {}
utilities.stacker=stacker
local function start(s,t,first,last)
 if s.mode=="switch" then
  local n=tostring(t[last])
  if trace_stacker then
   s.report("start: %s",n)
  end
  return n
 else
  local r={}
  for i=first,last do
   r[#r+1]=tostring(t[i])
  end
  local n=concat(r," ")
  if trace_stacker then
   s.report("start: %s",n)
  end
  return n
 end
end
local function stop(s,t,first,last)
 if s.mode=="switch" then
  local n=tostring(false)
  if trace_stacker then
   s.report("stop: %s",n)
  end
  return n
 else
  local r={}
  for i=last,first,-1 do
   r[#r+1]=tostring(false)
  end
  local n=concat(r," ")
  if trace_stacker then
   s.report("stop: %s",n)
  end
  return n
 end
end
local function change(s,t1,first1,last1,t2,first2,last2)
 if s.mode=="switch" then
  local n=tostring(t2[last2])
  if trace_stacker then
   s.report("change: %s",n)
  end
  return n
 else
  local r={}
  for i=last1,first1,-1 do
   r[#r+1]=tostring(false)
  end
  local n=concat(r," ")
  for i=first2,last2 do
   r[#r+1]=tostring(t2[i])
  end
  if trace_stacker then
   s.report("change: %s",n)
  end
  return n
 end
end
function stacker.new(name)
 local report=logs.reporter("stacker",name or nil)
 local s
 local stack={}
 local list={}
 local ids={}
 local hash={}
 local hashing=true
 local function push(...)
  for i=1,select("#",...) do
   insert(stack,(select(i,...))) 
  end
  if hashing then
   local c=concat(stack,"|")
   local n=hash[c]
   if not n then
    n=#list+1
    hash[c]=n
    list[n]=fastcopy(stack)
   end
   insert(ids,n)
   return n
  else
   local n=#list+1
   list[n]=fastcopy(stack)
   insert(ids,n)
   return n
  end
 end
 local function pop()
  remove(stack)
  remove(ids)
  return ids[#ids] or s.unset or -1
 end
 local function clean()
  if #stack==0 then
   if trace_stacker then
    s.report("%s list entries, %s stack entries",#list,#stack)
   end
  end
 end
 local tops={}
 local top=nil
 local switch=nil
 local function resolve_reset(mode)
  if #tops>0 then
   report("resetting %s left-over states of %a",#tops,name)
  end
  tops={}
  top=nil
  switch=nil
 end
 local function resolve_begin(mode)
  if mode then
   switch=mode=="switch"
  else
   switch=s.mode=="switch"
  end
  top={ switch=switch }
  insert(tops,top)
 end
 local function resolve_step(ti)
  if not top then
   return
  end
  local result=nil
  local noftop=#top
  if ti>0 then
   local current=list[ti]
   if current then
    local noflist=#current
    local nofsame=0
    if noflist>noftop then
     for i=1,noflist do
      if current[i]==top[i] then
       nofsame=i
      else
       break
      end
     end
    else
     for i=1,noflist do
      if current[i]==top[i] then
       nofsame=i
      else
       break
      end
     end
    end
    local plus=nofsame+1
    if plus<=noftop then
     if plus<=noflist then
      if switch then
       result=s.change(s,top,plus,noftop,current,nofsame,noflist)
      else
       result=s.change(s,top,plus,noftop,current,plus,noflist)
      end
     else
      if switch then
       result=s.change(s,top,plus,noftop,current,nofsame,noflist)
      else
       result=s.stop(s,top,plus,noftop)
      end
     end
    elseif plus<=noflist then
     if switch then
      result=s.start(s,current,nofsame,noflist)
     else
      result=s.start(s,current,plus,noflist)
     end
    end
    top=current
   else
    if 1<=noftop then
     result=s.stop(s,top,1,noftop)
    end
    top={}
   end
   return result
  else
   if 1<=noftop then
    result=s.stop(s,top,1,noftop)
   end
   top={}
   return result
  end
 end
 local function resolve_end()
  if #tops>0 then 
   local result=s.stop(s,top,1,#top)
   remove(tops)
   top=tops[#tops]
   switch=top and top.switch
   return result
  end
 end
 local function resolve(t)
  resolve_begin()
  for i=1,#t do
   resolve_step(t[i])
  end
  resolve_end()
 end
 s={
  name=name or "unknown",
  unset=-1,
  report=report,
  start=start,
  stop=stop,
  change=change,
  push=push,
  pop=pop,
  clean=clean,
  resolve=resolve,
  resolve_begin=resolve_begin,
  resolve_step=resolve_step,
  resolve_end=resolve_end,
  resolve_reset=resolve_reset,
 }
 return s 
end

end -- closure

do -- begin closure to overcome local limits and interference

if not modules then modules={} end modules ['util-zip']={
 version=1.001,
 author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
 copyright="PRAGMA ADE / ConTeXt Development Team",
 license="see context related readme files"
}
local type,tostring,tonumber=type,tostring,tonumber
local sort,concat=table.sort,table.concat
local find,format,sub,gsub=string.find,string.format,string.sub,string.gsub
local osdate,ostime,osclock=os.date,os.time,os.clock
local ioopen=io.open
local loaddata,savedata=io.loaddata,io.savedata
local filejoin,isdir,dirname,mkdirs=file.join,lfs.isdir,file.dirname,dir.mkdirs
local suffix,suffixes=file.suffix,file.suffixes
local openfile=io.open
gzip=gzip or {} 
if not zlib then
 zlib=xzip 
elseif not xzip then
 xzip=zlib
end
local files=utilities.files
local openfile=files.open
local closefile=files.close
local getsize=files.size
local readstring=files.readstring
local readcardinal2=files.readcardinal2le
local readcardinal4=files.readcardinal4le
local setposition=files.setposition
local getposition=files.getposition
local skipbytes=files.skip
local band=bit32.band
local rshift=bit32.rshift
local lshift=bit32.lshift
local zlibdecompress=zlib.decompress
local zlibdecompresssize=zlib.decompresssize
local zlibchecksum=zlib.crc32
if not CONTEXTLMTXMODE or CONTEXTLMTXMODE==0 then
 local cs=zlibchecksum
 zlibchecksum=function(str,n) return cs(n or 0,str) end
end
local decompress=function(source)   return zlibdecompress (source,-15)   end 
local decompresssize=function(source,targetsize) return zlibdecompresssize(source,targetsize,-15) end 
local calculatecrc=function(buffer,initial) return zlibchecksum   (initial or 0,buffer)   end
local zipfiles={}
utilities.zipfiles=zipfiles
local openzipfile,closezipfile,unzipfile,foundzipfile,getziphash,getziplist  do
 function openzipfile(name)
  return {
   name=name,
   handle=openfile(name,0),
  }
 end
 local function update(handle,data)
  position=data.offset
  setposition(handle,position)
  local signature=readstring(handle,4)
  if signature=="PK\3\4" then
   local version=readcardinal2(handle)
   local flag=readcardinal2(handle)
   local method=readcardinal2(handle)
          skipbytes(handle,4)
   local crc32=readcardinal4(handle)
   local compressed=readcardinal4(handle)
   local uncompressed=readcardinal4(handle)
   local namelength=readcardinal2(handle)
   local extralength=readcardinal2(handle)
   local filename=readstring(handle,namelength)
   local descriptor=band(flag,8)~=0
   local encrypted=band(flag,1)~=0
   local acceptable=method==0 or method==8
   local skipped=0
   local size=0
   if encrypted then
    size=readcardinal2(handle)
    skipbytes(handle,size)
    skipped=skipped+size+2
    skipbytes(8)
    skipped=skipped+8
    size=readcardinal2(handle)
    skipbytes(handle,size)
    skipped=skipped+size+2
    size=readcardinal4(handle)
    skipbytes(handle,size)
    skipped=skipped+size+4
    size=readcardinal2(handle)
    skipbytes(handle,size)
    skipped=skipped+size+2
   end
   if acceptable then
     if        filename~=data.filename  then
    else
     position=position+30+namelength+extralength+skipped
     data.position=position
     return position
    end
   else
   end
  end
  data.position=false
  return false
 end
 local function collect(z)
  if not z.list then
   local list={}
   local hash={}
   local position=0
   local index=0
   local handle=z.handle
   local size=getsize(handle)
   for i=size-4,size-64*1024,-1 do
    setposition(handle,i)
    local enddirsignature=readcardinal4(handle)
    if enddirsignature==0x06054B50 then
     local thisdisknumber=readcardinal2(handle)
     local centraldisknumber=readcardinal2(handle)
     local thisnofentries=readcardinal2(handle)
     local totalnofentries=readcardinal2(handle)
     local centralsize=readcardinal4(handle)
     local centraloffset=readcardinal4(handle)
     local commentlength=readcardinal2(handle)
     local comment=readstring(handle,length)
     if size-i>=22 then
      if thisdisknumber==centraldisknumber then
       setposition(handle,centraloffset)
       while true do
        if readcardinal4(handle)==0x02014B50 then
                skipbytes(handle,4)
         local flag=readcardinal2(handle)
         local method=readcardinal2(handle)
                skipbytes(handle,4)
         local crc32=readcardinal4(handle)
         local compressed=readcardinal4(handle)
         local uncompressed=readcardinal4(handle)
         local namelength=readcardinal2(handle)
         local extralength=readcardinal2(handle)
         local commentlength=readcardinal2(handle)
                skipbytes(handle,8)
         local headeroffset=readcardinal4(handle)
         local filename=readstring(handle,namelength)
                skipbytes(handle,extralength+commentlength)
         local descriptor=band(flag,8)~=0
         local encrypted=band(flag,1)~=0
         local acceptable=method==0 or method==8
         if acceptable then
          index=index+1
          local data={
           filename=filename,
           index=index,
           position=nil,
           method=method,
           compressed=compressed,
           uncompressed=uncompressed,
           crc32=crc32,
           encrypted=encrypted,
           offset=headeroffset,
          }
          hash[filename]=data
          list[index]=data
         end
        else
         break
        end
       end
      end
      break
     end
    end
   end
   z.list=list
   z.hash=hash
  end
 end
 function getziplist(z)
  local list=z.list
  if not list then
   collect(z)
  end
  return z.list
 end
 function getziphash(z)
  local hash=z.hash
  if not hash then
   collect(z)
  end
  return z.hash
 end
 function foundzipfile(z,name)
  return getziphash(z)[name]
 end
 function closezipfile(z)
  local f=z.handle
  if f then
   closefile(f)
   z.handle=nil
  end
 end
 function unzipfile(z,filename,check)
  local hash=z.hash
  if not hash then
   hash=zipfiles.hash(z)
  end
  local data=hash[filename] 
  if not data then
  end
  if data then
   local handle=z.handle
   local position=data.position
   local compressed=data.compressed
   if position==nil then
    position=update(handle,data)
   end
   if position and compressed>0 then
    setposition(handle,position)
    local result=readstring(handle,compressed)
    if data.method==8 then
     if decompresssize then
      result=decompresssize(result,data.uncompressed)
     else
      result=decompress(result)
     end
    end
    if check and data.crc32~=calculatecrc(result) then
     print("checksum mismatch")
     return ""
    end
    return result
   else
    return ""
   end
  end
 end
 zipfiles.open=openzipfile
 zipfiles.close=closezipfile
 zipfiles.unzip=unzipfile
 zipfiles.hash=getziphash
 zipfiles.list=getziplist
 zipfiles.found=foundzipfile
end
if xzip then 
 local writecardinal1=files.writebyte
 local writecardinal2=files.writecardinal2le
 local writecardinal4=files.writecardinal4le
 local logwriter=logs.writer
 local globpattern=dir.globpattern
 local compress=xzip.compress
 local checksum=xzip.crc32
 local function fromdostime(dostime,dosdate)
  return ostime {
   year=rshift(dosdate,9)+1980,
   month=band(rshift(dosdate,5),0x0F),
   day=band((dosdate   ),0x1F),
   hour=band(rshift(dostime,11)    ),
   min=band(rshift(dostime,5),0x3F),
   sec=band((dostime   ),0x1F),
  }
 end
 local function todostime(time)
  local t=osdate("*t",time)
  return
   lshift(t.year-1980,9)+lshift(t.month,5)+t.day,
   lshift(t.hour,11)+lshift(t.min,5)+rshift(t.sec,1)
 end
 local function openzip(filename,level,comment,verbose)
  local f=ioopen(filename,"wb")
  if f then
   return {
    filename=filename,
    handle=f,
    list={},
    level=tonumber(level) or 3,
    comment=tostring(comment),
    verbose=verbose,
    uncompressed=0,
    compressed=0,
   }
  end
 end
 local function writezip(z,name,data,level,time)
  local f=z.handle
  local list=z.list
  local level=tonumber(level) or z.level or 3
  local method=8
  local zipped=compress(data,level)
  local checksum=checksum(data)
  local verbose=z.verbose
  if not zipped then
   method=0
   zipped=data
  end
  local start=f:seek()
  local compressed=#zipped
  local uncompressed=#data
  z.compressed=z.compressed+compressed
  z.uncompressed=z.uncompressed+uncompressed
  if verbose then
   local pct=100*compressed/uncompressed
   if pct>=100 then
    logwriter(format("%10i        %s",uncompressed,name))
   else
    logwriter(format("%10i  %02.1f  %s",uncompressed,pct,name))
   end
  end
  f:write("\x50\x4b\x03\x04")
  writecardinal2(f,0)   
  writecardinal2(f,0)   
  writecardinal2(f,method)    
  writecardinal2(f,0)   
  writecardinal2(f,0)   
  writecardinal4(f,checksum)  
  writecardinal4(f,compressed)   
  writecardinal4(f,uncompressed) 
  writecardinal2(f,#name)  
  writecardinal2(f,0)
  f:write(name)      
  f:write(zipped)
  list[#list+1]={ #zipped,#data,name,checksum,start,time or 0 }
 end
 local function closezip(z)
  local f=z.handle
  local list=z.list
  local comment=z.comment
  local verbose=z.verbose
  local count=#list
  local start=f:seek()
  for i=1,count do
   local l=list[i]
   local compressed=l[1]
   local uncompressed=l[2]
   local name=l[3]
   local checksum=l[4]
   local start=l[5]
   local time=l[6]
   local date,time=todostime(time)
   f:write('\x50\x4b\x01\x02')
   writecardinal2(f,0)   
   writecardinal2(f,0)   
   writecardinal2(f,0)   
   writecardinal2(f,8)   
   writecardinal2(f,time)   
   writecardinal2(f,date)   
   writecardinal4(f,checksum)  
   writecardinal4(f,compressed)   
   writecardinal4(f,uncompressed) 
   writecardinal2(f,#name)  
   writecardinal2(f,0)   
   writecardinal2(f,0)   
   writecardinal2(f,0)   
   writecardinal2(f,0)   
   writecardinal4(f,0)   
   writecardinal4(f,start)  
   f:write(name)      
  end
  local stop=f:seek()
  local size=stop-start
  f:write('\x50\x4b\x05\x06')
  writecardinal2(f,0)   
  writecardinal2(f,0)   
  writecardinal2(f,count)  
  writecardinal2(f,count)  
  writecardinal4(f,size)   
  writecardinal4(f,start)  
  if type(comment)=="string" and comment~="" then
   writecardinal2(f,#comment) 
   f:write(comment)     
  else
   writecardinal2(f,0)
  end
  if verbose then
   local compressed=z.compressed
   local uncompressed=z.uncompressed
   local filename=z.filename
   local pct=100*compressed/uncompressed
   logwriter("")
   if pct>=100 then
    logwriter(format("%10i        %s",uncompressed,filename))
   else
    logwriter(format("%10i  %02.1f  %s",uncompressed,pct,filename))
   end
  end
  f:close()
 end
 local function zipdir(zipname,path,level,verbose)
  if type(zipname)=="table" then
   verbose=zipname.verbose
   level=zipname.level
   path=zipname.path
   zipname=zipname.zipname
  end
  if not zipname or zipname=="" then
   return
  end
  if not path or path=="" then
   path="."
  end
  if not isdir(path) then
   return
  end
  path=gsub(path,"\\+","/")
  path=gsub(path,"/+","/")
  local list={}
  local count=0
  globpattern(path,"",true,function(name,size,time)
   count=count+1
   list[count]={ name,time }
  end)
  sort(list,function(a,b)
   return a[1]<b[1]
  end)
  local zipf=openzip(zipname,level,comment,verbose)
  if zipf then
   local p=#path+2
   for i=1,count do
    local li=list[i]
    local name=li[1]
    local time=li[2]
    local data=loaddata(name)
    local name=sub(name,p,#name)
    writezip(zipf,name,data,level,time,verbose)
   end
   closezip(zipf)
  end
 end
 local function unzipdir(zipname,path,verbose,collect,validate)
  if type(zipname)=="table" then
   validate=zipname.validate
   collect=zipname.collect
   verbose=zipname.verbose
   path=zipname.path
   zipname=zipname.zipname
  end
  if not zipname or zipname=="" then
   return
  end
  if not path or path=="" then
   path="."
  end
  local z=openzipfile(zipname)
  if z then
   local list=getziplist(z)
   if list then
    local total=0
    local count=#list
    local step=number.idiv(count,10)
    local done=0
    local steps=verbose=="steps"
    local time=steps and osclock()
    if collect then
     collect={}
    else
     collect=false
    end
    for i=1,count do
     local l=list[i]
     local n=l.filename
     if not validate or validate(n) then
      local d=unzipfile(z,n) 
      if d then
       local p=filejoin(path,n)
       if mkdirs(dirname(p)) then
        if steps then
         total=total+#d
         done=done+1
         if done>=step then
          done=0
          logwriter(format("%4i files of %4i done, %10i bytes, %0.3f seconds",i,count,total,osclock()-time))
         end
        elseif verbose then
         logwriter(n)
        end
        savedata(p,d)
        if collect then
         collect[#collect+1]=p
        end
       end
      else
       logwriter(format("problem with file %s",n))
      end
     else
     end
    end
    if steps then
     logwriter(format("%4i files of %4i done, %10i bytes, %0.3f seconds",count,count,total,osclock()-time))
    end
    closezipfile(z)
    if collect then
     return collect
    end
   else
    closezipfile(z)
   end
  end
 end
 zipfiles.zipdir=zipdir
 zipfiles.unzipdir=unzipdir
end
local pattern="^\x1F\x8B\x08"
local gziplevel=3
function gzip.suffix(filename)
 local suffix,extra=suffixes(filename)
 local gzipped=extra=="gz"
 return suffix,gzipped
end
function gzip.compressed(s)
 return s and find(s,pattern)
end
local getdecompressed
local putcompressed
if gzip.compress then
 local gzipwindow=15+16 
 local compress=zlib.compress
 local decompress=zlib.decompress
 getdecompressed=function(str)
  return decompress(str,gzipwindow) 
 end
 putcompressed=function(str,level)
  return compress(str,level or gziplevel,nil,gzipwindow)
 end
else
 local gzipwindow=-15 
 local identifier="\x1F\x8B"
 local compress=zlib.compress
 local decompress=zlib.decompress
 local zlibchecksum=zlib.crc32
 if not CONTEXTLMTXMODE or CONTEXTLMTXMODE==0 then
  local cs=zlibchecksum
  zlibchecksum=function(str,n) return cs(n or 0,str) end
 end
 local streams=utilities.streams
 local openstream=streams.openstring
 local closestream=streams.close
 local getposition=streams.getposition
 local readbyte=streams.readbyte
 local readcardinal4=streams.readcardinal4le
 local readcardinal2=streams.readcardinal2le
 local readstring=streams.readstring
 local readcstring=streams.readcstring
 local skipbytes=streams.skip
 local tocardinal1=streams.tocardinal1
 local tocardinal4=streams.tocardinal4le
 getdecompressed=function(str)
  local s=openstream(str)
  local identifier=readstring(s,2)
  local method=readbyte(s,1)
  local flags=readbyte(s,1)
  local timestamp=readcardinal4(s)
  local compression=readbyte(s,1)
  local operating=readbyte(s,1)
  local isjusttext=band(flags,0x01)~=0 and true    or false
  local extrasize=band(flags,0x04)~=0 and readcardinal2(s) or 0
  local filename=band(flags,0x08)~=0 and readcstring(s)   or ""
  local comment=band(flags,0x10)~=0 and readcstring(s)   or ""
  local checksum=band(flags,0x02)~=0 and readcardinal2(s) or 0
  local compressed=readstring(s,#str)
  local data=decompress(compressed,gzipwindow) 
  return data
 end
 putcompressed=function(str,level,originalname)
  return concat {
   identifier,
   tocardinal1(0x08),
   tocardinal1(0x08),
   tocardinal4(os.time()),
   tocardinal1(0x02),
   tocardinal1(0xFF),
   (originalname or "unknownname").."\0",
   compress(str,level,nil,gzipwindow),
   tocardinal4(zlibchecksum(str)),
   tocardinal4(#str),
  }
 end
end
function gzip.load(filename)
 local f=openfile(filename,"rb")
 if not f then
 else
  local data=f:read("*all")
  f:close()
  if data and data~="" then
   if suffix(filename)=="gz" then
    data=getdecompressed(data)
   end
   return data
  end
 end
end
function gzip.save(filename,data,level,originalname)
 if suffix(filename)~="gz" then
  filename=filename..".gz"
 end
 local f=openfile(filename,"wb")
 if f then
  data=putcompressed(data or "",level or gziplevel,originalname)
  f:write(data)
  f:close()
  return #data
 end
end
function gzip.compress(s,level)
 if s and not find(s,pattern) then
  if not level then
   level=gziplevel
  elseif level<=0 then
   return s
  elseif level>9 then
   level=9
  end
  return putcompressed(s,level or gziplevel) or s
 end
end
function gzip.decompress(s)
 if s and find(s,pattern) then
  return getdecompressed(s)
 else
  return s
 end
end

end -- closure