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
|
/*
* Copyright © 2007,2008,2009 Red Hat, Inc.
* Copyright © 2011,2012 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Red Hat Author(s): Behdad Esfahbod
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_PRIVATE_HH
#define HB_PRIVATE_HH
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "hb.h"
#define HB_H_IN
#ifdef HAVE_OT
#include "hb-ot.h"
#define HB_OT_H_IN
#endif
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <assert.h>
/* We only use these two for debug output. However, the debug code is
* always seen by the compiler (and optimized out in non-debug builds.
* If including these becomes a problem, we can start thinking about
* someway around that. */
#include <stdio.h>
#include <errno.h>
#include <stdarg.h>
/* Compile-time custom allocator support. */
#if defined(hb_malloc_impl) \
&& defined(hb_calloc_impl) \
&& defined(hb_realloc_impl) \
&& defined(hb_free_impl)
extern "C" void* hb_malloc_impl(size_t size);
extern "C" void* hb_calloc_impl(size_t nmemb, size_t size);
extern "C" void* hb_realloc_impl(void *ptr, size_t size);
extern "C" void hb_free_impl(void *ptr);
#define malloc hb_malloc_impl
#define calloc hb_calloc_impl
#define realloc hb_realloc_impl
#define free hb_free_impl
#endif
/* Compiler attributes */
#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
#define _HB_BOOLEAN_EXPR(expr) ((expr) ? 1 : 0)
#define likely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 1))
#define unlikely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 0))
#else
#define likely(expr) (expr)
#define unlikely(expr) (expr)
#endif
#ifndef __GNUC__
#undef __attribute__
#define __attribute__(x)
#endif
#if __GNUC__ >= 3
#define HB_PURE_FUNC __attribute__((pure))
#define HB_CONST_FUNC __attribute__((const))
#define HB_PRINTF_FUNC(format_idx, arg_idx) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
#else
#define HB_PURE_FUNC
#define HB_CONST_FUNC
#define HB_PRINTF_FUNC(format_idx, arg_idx)
#endif
#if __GNUC__ >= 4
#define HB_UNUSED __attribute__((unused))
#else
#define HB_UNUSED
#endif
#ifndef HB_INTERNAL
# if !defined(__MINGW32__) && !defined(__CYGWIN__)
# define HB_INTERNAL __attribute__((__visibility__("hidden")))
# else
# define HB_INTERNAL
# endif
#endif
#if __GNUC__ >= 3
#define HB_FUNC __PRETTY_FUNCTION__
#elif defined(_MSC_VER)
#define HB_FUNC __FUNCSIG__
#else
#define HB_FUNC __func__
#endif
/*
* Borrowed from https://bugzilla.mozilla.org/show_bug.cgi?id=1215411
* HB_FALLTHROUGH is an annotation to suppress compiler warnings about switch
* cases that fall through without a break or return statement. HB_FALLTHROUGH
* is only needed on cases that have code:
*
* switch (foo) {
* case 1: // These cases have no code. No fallthrough annotations are needed.
* case 2:
* case 3:
* foo = 4; // This case has code, so a fallthrough annotation is needed:
* HB_FALLTHROUGH;
* default:
* return foo;
* }
*/
#if defined(__clang__) && __cplusplus >= 201103L
/* clang's fallthrough annotations are only available starting in C++11. */
# define HB_FALLTHROUGH [[clang::fallthrough]]
#elif defined(_MSC_VER)
/*
* MSVC's __fallthrough annotations are checked by /analyze (Code Analysis):
* https://msdn.microsoft.com/en-us/library/ms235402%28VS.80%29.aspx
*/
# include <sal.h>
# define HB_FALLTHROUGH __fallthrough
#else
# define HB_FALLTHROUGH /* FALLTHROUGH */
#endif
#if defined(_WIN32) || defined(__CYGWIN__)
/* We need Windows Vista for both Uniscribe backend and for
* MemoryBarrier. We don't support compiling on Windows XP,
* though we run on it fine. */
# if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0600
# undef _WIN32_WINNT
# endif
# ifndef _WIN32_WINNT
# define _WIN32_WINNT 0x0600
# endif
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN 1
# endif
# ifndef STRICT
# define STRICT 1
# endif
# if defined(_WIN32_WCE)
/* Some things not defined on Windows CE. */
# define strdup _strdup
# define vsnprintf _vsnprintf
# define getenv(Name) NULL
# if _WIN32_WCE < 0x800
# define setlocale(Category, Locale) "C"
static int errno = 0; /* Use something better? */
# endif
# elif defined(WINAPI_FAMILY) && (WINAPI_FAMILY==WINAPI_FAMILY_PC_APP || WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP)
# define getenv(Name) NULL
# endif
# if defined(_MSC_VER) && _MSC_VER < 1900
# define snprintf _snprintf
# elif defined(_MSC_VER) && _MSC_VER >= 1900
# /* Covers VC++ Error for strdup being a deprecated POSIX name and to instead use _strdup instead */
# define strdup _strdup
# endif
#endif
#if HAVE_ATEXIT
/* atexit() is only safe to be called from shared libraries on certain
* platforms. Whitelist.
* https://bugs.freedesktop.org/show_bug.cgi?id=82246 */
# if defined(__linux) && defined(__GLIBC_PREREQ)
# if __GLIBC_PREREQ(2,3)
/* From atexit() manpage, it's safe with glibc 2.2.3 on Linux. */
# define HB_USE_ATEXIT 1
# endif
# elif defined(_MSC_VER) || defined(__MINGW32__)
/* For MSVC:
* http://msdn.microsoft.com/en-ca/library/tze57ck3.aspx
* http://msdn.microsoft.com/en-ca/library/zk17ww08.aspx
* mingw32 headers say atexit is safe to use in shared libraries.
*/
# define HB_USE_ATEXIT 1
# elif defined(__ANDROID__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
/* This was fixed in Android NKD r8 or r8b:
* https://code.google.com/p/android/issues/detail?id=6455
* which introduced GCC 4.6:
* https://developer.android.com/tools/sdk/ndk/index.html
*/
# define HB_USE_ATEXIT 1
# endif
#endif
/* Basics */
#ifndef NULL
# define NULL ((void *) 0)
#endif
#undef MIN
template <typename Type>
static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; }
#undef MAX
template <typename Type>
static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; }
static inline unsigned int DIV_CEIL (const unsigned int a, unsigned int b)
{ return (a + (b - 1)) / b; }
#undef ARRAY_LENGTH
template <typename Type, unsigned int n>
static inline unsigned int ARRAY_LENGTH (const Type (&)[n]) { return n; }
/* A const version, but does not detect erratically being called on pointers. */
#define ARRAY_LENGTH_CONST(__array) ((signed int) (sizeof (__array) / sizeof (__array[0])))
#define HB_STMT_START do
#define HB_STMT_END while (0)
#define _ASSERT_STATIC1(_line, _cond) HB_UNUSED typedef int _static_assert_on_line_##_line##_failed[(_cond)?1:-1]
#define _ASSERT_STATIC0(_line, _cond) _ASSERT_STATIC1 (_line, (_cond))
#define ASSERT_STATIC(_cond) _ASSERT_STATIC0 (__LINE__, (_cond))
template <unsigned int cond> class hb_assert_constant_t {};
#define ASSERT_STATIC_EXPR_ZERO(_cond) (0 * (unsigned int) sizeof (hb_assert_constant_t<_cond>))
#define _PASTE1(a,b) a##b
#define PASTE(a,b) _PASTE1(a,b)
/* Lets assert int types. Saves trouble down the road. */
ASSERT_STATIC (sizeof (int8_t) == 1);
ASSERT_STATIC (sizeof (uint8_t) == 1);
ASSERT_STATIC (sizeof (int16_t) == 2);
ASSERT_STATIC (sizeof (uint16_t) == 2);
ASSERT_STATIC (sizeof (int32_t) == 4);
ASSERT_STATIC (sizeof (uint32_t) == 4);
ASSERT_STATIC (sizeof (int64_t) == 8);
ASSERT_STATIC (sizeof (uint64_t) == 8);
ASSERT_STATIC (sizeof (hb_codepoint_t) == 4);
ASSERT_STATIC (sizeof (hb_position_t) == 4);
ASSERT_STATIC (sizeof (hb_mask_t) == 4);
ASSERT_STATIC (sizeof (hb_var_int_t) == 4);
/* We like our types POD */
#define _ASSERT_TYPE_POD1(_line, _type) union _type_##_type##_on_line_##_line##_is_not_POD { _type instance; }
#define _ASSERT_TYPE_POD0(_line, _type) _ASSERT_TYPE_POD1 (_line, _type)
#define ASSERT_TYPE_POD(_type) _ASSERT_TYPE_POD0 (__LINE__, _type)
#ifdef __GNUC__
# define _ASSERT_INSTANCE_POD1(_line, _instance) \
HB_STMT_START { \
typedef __typeof__(_instance) _type_##_line; \
_ASSERT_TYPE_POD1 (_line, _type_##_line); \
} HB_STMT_END
#else
# define _ASSERT_INSTANCE_POD1(_line, _instance) typedef int _assertion_on_line_##_line##_not_tested
#endif
# define _ASSERT_INSTANCE_POD0(_line, _instance) _ASSERT_INSTANCE_POD1 (_line, _instance)
# define ASSERT_INSTANCE_POD(_instance) _ASSERT_INSTANCE_POD0 (__LINE__, _instance)
/* Check _assertion in a method environment */
#define _ASSERT_POD1(_line) \
HB_UNUSED inline void _static_assertion_on_line_##_line (void) const \
{ _ASSERT_INSTANCE_POD1 (_line, *this); /* Make sure it's POD. */ }
# define _ASSERT_POD0(_line) _ASSERT_POD1 (_line)
# define ASSERT_POD() _ASSERT_POD0 (__LINE__)
/* Misc */
/* Void! */
struct _hb_void_t {};
typedef const _hb_void_t *hb_void_t;
#define HB_VOID ((const _hb_void_t *) NULL)
/* Return the number of 1 bits in mask. */
static inline HB_CONST_FUNC unsigned int
_hb_popcount32 (uint32_t mask)
{
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
return __builtin_popcount (mask);
#else
/* "HACKMEM 169" */
uint32_t y;
y = (mask >> 1) &033333333333;
y = mask - y - ((y >>1) & 033333333333);
return (((y + (y >> 3)) & 030707070707) % 077);
#endif
}
/* Returns the number of bits needed to store number */
static inline HB_CONST_FUNC unsigned int
_hb_bit_storage (unsigned int number)
{
#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
return likely (number) ? (sizeof (unsigned int) * 8 - __builtin_clz (number)) : 0;
#else
unsigned int n_bits = 0;
while (number) {
n_bits++;
number >>= 1;
}
return n_bits;
#endif
}
/* Returns the number of zero bits in the least significant side of number */
static inline HB_CONST_FUNC unsigned int
_hb_ctz (unsigned int number)
{
#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
return likely (number) ? __builtin_ctz (number) : 0;
#else
unsigned int n_bits = 0;
if (unlikely (!number)) return 0;
while (!(number & 1)) {
n_bits++;
number >>= 1;
}
return n_bits;
#endif
}
static inline bool
_hb_unsigned_int_mul_overflows (unsigned int count, unsigned int size)
{
return (size > 0) && (count >= ((unsigned int) -1) / size);
}
/* Type of bsearch() / qsort() compare function */
typedef int (*hb_compare_func_t) (const void *, const void *);
/* arrays and maps */
#define HB_PREALLOCED_ARRAY_INIT {0, 0, NULL}
template <typename Type, unsigned int StaticSize=16>
struct hb_prealloced_array_t
{
unsigned int len;
unsigned int allocated;
Type *array;
Type static_array[StaticSize];
void init (void) { memset (this, 0, sizeof (*this)); }
inline Type& operator [] (unsigned int i) { return array[i]; }
inline const Type& operator [] (unsigned int i) const { return array[i]; }
inline Type *push (void)
{
if (!array) {
array = static_array;
allocated = ARRAY_LENGTH (static_array);
}
if (likely (len < allocated))
return &array[len++];
/* Need to reallocate */
unsigned int new_allocated = allocated + (allocated >> 1) + 8;
Type *new_array = NULL;
if (array == static_array) {
new_array = (Type *) calloc (new_allocated, sizeof (Type));
if (new_array)
memcpy (new_array, array, len * sizeof (Type));
} else {
bool overflows = (new_allocated < allocated) || _hb_unsigned_int_mul_overflows (new_allocated, sizeof (Type));
if (likely (!overflows)) {
new_array = (Type *) realloc (array, new_allocated * sizeof (Type));
}
}
if (unlikely (!new_array))
return NULL;
array = new_array;
allocated = new_allocated;
return &array[len++];
}
inline void pop (void)
{
len--;
}
inline void remove (unsigned int i)
{
if (unlikely (i >= len))
return;
memmove (static_cast<void *> (&array[i]),
static_cast<void *> (&array[i + 1]),
(len - i - 1) * sizeof (Type));
len--;
}
inline void shrink (unsigned int l)
{
if (l < len)
len = l;
}
template <typename T>
inline Type *find (T v) {
for (unsigned int i = 0; i < len; i++)
if (array[i] == v)
return &array[i];
return NULL;
}
template <typename T>
inline const Type *find (T v) const {
for (unsigned int i = 0; i < len; i++)
if (array[i] == v)
return &array[i];
return NULL;
}
inline void qsort (void)
{
::qsort (array, len, sizeof (Type), (hb_compare_func_t) Type::cmp);
}
inline void qsort (unsigned int start, unsigned int end)
{
::qsort (array + start, end - start, sizeof (Type), (hb_compare_func_t) Type::cmp);
}
template <typename T>
inline Type *bsearch (T *key)
{
return (Type *) ::bsearch (key, array, len, sizeof (Type), (hb_compare_func_t) Type::cmp);
}
template <typename T>
inline const Type *bsearch (T *key) const
{
return (const Type *) ::bsearch (key, array, len, sizeof (Type), (hb_compare_func_t) Type::cmp);
}
inline void finish (void)
{
if (array != static_array)
free (array);
array = NULL;
allocated = len = 0;
}
};
template <typename Type>
struct hb_auto_array_t : hb_prealloced_array_t <Type>
{
hb_auto_array_t (void) { hb_prealloced_array_t<Type>::init (); }
~hb_auto_array_t (void) { hb_prealloced_array_t<Type>::finish (); }
};
#define HB_LOCKABLE_SET_INIT {HB_PREALLOCED_ARRAY_INIT}
template <typename item_t, typename lock_t>
struct hb_lockable_set_t
{
hb_prealloced_array_t <item_t, 2> items;
inline void init (void) { items.init (); }
template <typename T>
inline item_t *replace_or_insert (T v, lock_t &l, bool replace)
{
l.lock ();
item_t *item = items.find (v);
if (item) {
if (replace) {
item_t old = *item;
*item = v;
l.unlock ();
old.finish ();
}
else {
item = NULL;
l.unlock ();
}
} else {
item = items.push ();
if (likely (item))
*item = v;
l.unlock ();
}
return item;
}
template <typename T>
inline void remove (T v, lock_t &l)
{
l.lock ();
item_t *item = items.find (v);
if (item) {
item_t old = *item;
*item = items[items.len - 1];
items.pop ();
l.unlock ();
old.finish ();
} else {
l.unlock ();
}
}
template <typename T>
inline bool find (T v, item_t *i, lock_t &l)
{
l.lock ();
item_t *item = items.find (v);
if (item)
*i = *item;
l.unlock ();
return !!item;
}
template <typename T>
inline item_t *find_or_insert (T v, lock_t &l)
{
l.lock ();
item_t *item = items.find (v);
if (!item) {
item = items.push ();
if (likely (item))
*item = v;
}
l.unlock ();
return item;
}
inline void finish (lock_t &l)
{
if (!items.len) {
/* No need for locking. */
items.finish ();
return;
}
l.lock ();
while (items.len) {
item_t old = items[items.len - 1];
items.pop ();
l.unlock ();
old.finish ();
l.lock ();
}
items.finish ();
l.unlock ();
}
};
/* ASCII tag/character handling */
static inline bool ISALPHA (unsigned char c)
{ return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'); }
static inline bool ISALNUM (unsigned char c)
{ return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'); }
static inline bool ISSPACE (unsigned char c)
{ return c == ' ' || c =='\f'|| c =='\n'|| c =='\r'|| c =='\t'|| c =='\v'; }
static inline unsigned char TOUPPER (unsigned char c)
{ return (c >= 'a' && c <= 'z') ? c - 'a' + 'A' : c; }
static inline unsigned char TOLOWER (unsigned char c)
{ return (c >= 'A' && c <= 'Z') ? c - 'A' + 'a' : c; }
#define HB_TAG_CHAR4(s) (HB_TAG(((const char *) s)[0], \
((const char *) s)[1], \
((const char *) s)[2], \
((const char *) s)[3]))
/* C++ helpers */
/* Makes class uncopyable. Use in private: section. */
#define NO_COPY(T) \
T (const T &o); \
T &operator = (const T &o)
/* Debug */
/* HB_NDEBUG disables some sanity checks that are very safe to disable and
* should be disabled in production systems. If NDEBUG is defined, enable
* HB_NDEBUG; but if it's desirable that normal assert()s (which are very
* light-weight) to be enabled, then HB_DEBUG can be defined to disable
* the costlier checks. */
#ifdef NDEBUG
#define HB_NDEBUG
#endif
#ifndef HB_DEBUG
#define HB_DEBUG 0
#endif
static inline bool
_hb_debug (unsigned int level,
unsigned int max_level)
{
return level < max_level;
}
#define DEBUG_LEVEL_ENABLED(WHAT, LEVEL) (_hb_debug ((LEVEL), HB_DEBUG_##WHAT))
#define DEBUG_ENABLED(WHAT) (DEBUG_LEVEL_ENABLED (WHAT, 0))
static inline void
_hb_print_func (const char *func)
{
if (func)
{
unsigned int func_len = strlen (func);
/* Skip "static" */
if (0 == strncmp (func, "static ", 7))
func += 7;
/* Skip "typename" */
if (0 == strncmp (func, "typename ", 9))
func += 9;
/* Skip return type */
const char *space = strchr (func, ' ');
if (space)
func = space + 1;
/* Skip parameter list */
const char *paren = strchr (func, '(');
if (paren)
func_len = paren - func;
fprintf (stderr, "%.*s", func_len, func);
}
}
template <int max_level> static inline void
_hb_debug_msg_va (const char *what,
const void *obj,
const char *func,
bool indented,
unsigned int level,
int level_dir,
const char *message,
va_list ap) HB_PRINTF_FUNC(7, 0);
template <int max_level> static inline void
_hb_debug_msg_va (const char *what,
const void *obj,
const char *func,
bool indented,
unsigned int level,
int level_dir,
const char *message,
va_list ap)
{
if (!_hb_debug (level, max_level))
return;
fprintf (stderr, "%-10s", what ? what : "");
if (obj)
fprintf (stderr, "(%0*lx) ", (unsigned int) (2 * sizeof (void *)), (unsigned long) obj);
else
fprintf (stderr, " %*s ", (unsigned int) (2 * sizeof (void *)), "");
if (indented) {
/* One may want to add ASCII version of these. See:
* https://bugs.freedesktop.org/show_bug.cgi?id=50970 */
#define VBAR "\342\224\202" /* U+2502 BOX DRAWINGS LIGHT VERTICAL */
#define VRBAR "\342\224\234" /* U+251C BOX DRAWINGS LIGHT VERTICAL AND RIGHT */
#define DLBAR "\342\225\256" /* U+256E BOX DRAWINGS LIGHT ARC DOWN AND LEFT */
#define ULBAR "\342\225\257" /* U+256F BOX DRAWINGS LIGHT ARC UP AND LEFT */
#define LBAR "\342\225\264" /* U+2574 BOX DRAWINGS LIGHT LEFT */
static const char bars[] = VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR;
fprintf (stderr, "%2u %s" VRBAR "%s",
level,
bars + sizeof (bars) - 1 - MIN ((unsigned int) sizeof (bars), (unsigned int) (sizeof (VBAR) - 1) * level),
level_dir ? (level_dir > 0 ? DLBAR : ULBAR) : LBAR);
} else
fprintf (stderr, " " VRBAR LBAR);
_hb_print_func (func);
if (message)
{
fprintf (stderr, ": ");
vfprintf (stderr, message, ap);
}
fprintf (stderr, "\n");
}
template <> inline void
_hb_debug_msg_va<0> (const char *what HB_UNUSED,
const void *obj HB_UNUSED,
const char *func HB_UNUSED,
bool indented HB_UNUSED,
unsigned int level HB_UNUSED,
int level_dir HB_UNUSED,
const char *message HB_UNUSED,
va_list ap HB_UNUSED) {}
template <int max_level> static inline void
_hb_debug_msg (const char *what,
const void *obj,
const char *func,
bool indented,
unsigned int level,
int level_dir,
const char *message,
...) HB_PRINTF_FUNC(7, 8);
template <int max_level> static inline void
_hb_debug_msg (const char *what,
const void *obj,
const char *func,
bool indented,
unsigned int level,
int level_dir,
const char *message,
...)
{
va_list ap;
va_start (ap, message);
_hb_debug_msg_va<max_level> (what, obj, func, indented, level, level_dir, message, ap);
va_end (ap);
}
template <> inline void
_hb_debug_msg<0> (const char *what HB_UNUSED,
const void *obj HB_UNUSED,
const char *func HB_UNUSED,
bool indented HB_UNUSED,
unsigned int level HB_UNUSED,
int level_dir HB_UNUSED,
const char *message HB_UNUSED,
...) HB_PRINTF_FUNC(7, 8);
template <> inline void
_hb_debug_msg<0> (const char *what HB_UNUSED,
const void *obj HB_UNUSED,
const char *func HB_UNUSED,
bool indented HB_UNUSED,
unsigned int level HB_UNUSED,
int level_dir HB_UNUSED,
const char *message HB_UNUSED,
...) {}
#define DEBUG_MSG_LEVEL(WHAT, OBJ, LEVEL, LEVEL_DIR, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), NULL, true, (LEVEL), (LEVEL_DIR), __VA_ARGS__)
#define DEBUG_MSG(WHAT, OBJ, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), NULL, false, 0, 0, __VA_ARGS__)
#define DEBUG_MSG_FUNC(WHAT, OBJ, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), HB_FUNC, false, 0, 0, __VA_ARGS__)
/*
* Printer
*/
template <typename T>
struct hb_printer_t {
const char *print (const T&) { return "something"; }
};
template <>
struct hb_printer_t<bool> {
const char *print (bool v) { return v ? "true" : "false"; }
};
template <>
struct hb_printer_t<hb_void_t> {
const char *print (hb_void_t) { return ""; }
};
/*
* Trace
*/
template <typename T>
static inline void _hb_warn_no_return (bool returned)
{
if (unlikely (!returned)) {
fprintf (stderr, "OUCH, returned with no call to return_trace(). This is a bug, please report.\n");
}
}
template <>
/*static*/ inline void _hb_warn_no_return<hb_void_t> (bool returned HB_UNUSED)
{}
template <int max_level, typename ret_t>
struct hb_auto_trace_t {
explicit inline hb_auto_trace_t (unsigned int *plevel_,
const char *what_,
const void *obj_,
const char *func,
const char *message,
...) : plevel (plevel_), what (what_), obj (obj_), returned (false)
{
if (plevel) ++*plevel;
va_list ap;
va_start (ap, message);
_hb_debug_msg_va<max_level> (what, obj, func, true, plevel ? *plevel : 0, +1, message, ap);
va_end (ap);
}
inline ~hb_auto_trace_t (void)
{
_hb_warn_no_return<ret_t> (returned);
if (!returned) {
_hb_debug_msg<max_level> (what, obj, NULL, true, plevel ? *plevel : 1, -1, " ");
}
if (plevel) --*plevel;
}
inline ret_t ret (ret_t v, unsigned int line = 0)
{
if (unlikely (returned)) {
fprintf (stderr, "OUCH, double calls to return_trace(). This is a bug, please report.\n");
return v;
}
_hb_debug_msg<max_level> (what, obj, NULL, true, plevel ? *plevel : 1, -1,
"return %s (line %d)",
hb_printer_t<ret_t>().print (v), line);
if (plevel) --*plevel;
plevel = NULL;
returned = true;
return v;
}
private:
unsigned int *plevel;
const char *what;
const void *obj;
bool returned;
};
template <typename ret_t> /* Optimize when tracing is disabled */
struct hb_auto_trace_t<0, ret_t> {
explicit inline hb_auto_trace_t (unsigned int *plevel_ HB_UNUSED,
const char *what HB_UNUSED,
const void *obj HB_UNUSED,
const char *func HB_UNUSED,
const char *message HB_UNUSED,
...) {}
inline ret_t ret (ret_t v, unsigned int line HB_UNUSED = 0) { return v; }
};
#define return_trace(RET) return trace.ret (RET, __LINE__)
/* Misc */
template <typename T> class hb_assert_unsigned_t;
template <> class hb_assert_unsigned_t<unsigned char> {};
template <> class hb_assert_unsigned_t<unsigned short> {};
template <> class hb_assert_unsigned_t<unsigned int> {};
template <> class hb_assert_unsigned_t<unsigned long> {};
template <typename T> static inline bool
hb_in_range (T u, T lo, T hi)
{
/* The sizeof() is here to force template instantiation.
* I'm sure there are better ways to do this but can't think of
* one right now. Declaring a variable won't work as HB_UNUSED
* is unusable on some platforms and unused types are less likely
* to generate a warning than unused variables. */
ASSERT_STATIC (sizeof (hb_assert_unsigned_t<T>) >= 0);
/* The casts below are important as if T is smaller than int,
* the subtract results will become a signed int! */
return (T)(u - lo) <= (T)(hi - lo);
}
template <typename T> static inline bool
hb_in_ranges (T u, T lo1, T hi1, T lo2, T hi2)
{
return hb_in_range (u, lo1, hi1) || hb_in_range (u, lo2, hi2);
}
template <typename T> static inline bool
hb_in_ranges (T u, T lo1, T hi1, T lo2, T hi2, T lo3, T hi3)
{
return hb_in_range (u, lo1, hi1) || hb_in_range (u, lo2, hi2) || hb_in_range (u, lo3, hi3);
}
/* Enable bitwise ops on enums marked as flags_t */
/* To my surprise, looks like the function resolver is happy to silently cast
* one enum to another... So this doesn't provide the type-checking that I
* originally had in mind... :(.
*
* For MSVC warnings, see: https://github.com/behdad/harfbuzz/pull/163
*/
#ifdef _MSC_VER
# pragma warning(disable:4200)
# pragma warning(disable:4800)
#endif
#define HB_MARK_AS_FLAG_T(T) \
extern "C++" { \
static inline T operator | (T l, T r) { return T ((unsigned) l | (unsigned) r); } \
static inline T operator & (T l, T r) { return T ((unsigned) l & (unsigned) r); } \
static inline T operator ^ (T l, T r) { return T ((unsigned) l ^ (unsigned) r); } \
static inline T operator ~ (T r) { return T (~(unsigned int) r); } \
static inline T& operator |= (T &l, T r) { l = l | r; return l; } \
static inline T& operator &= (T& l, T r) { l = l & r; return l; } \
static inline T& operator ^= (T& l, T r) { l = l ^ r; return l; } \
}
/* Useful for set-operations on small enums.
* For example, for testing "x ∈ {x1, x2, x3}" use:
* (FLAG_SAFE(x) & (FLAG(x1) | FLAG(x2) | FLAG(x3)))
*/
#define FLAG(x) (ASSERT_STATIC_EXPR_ZERO ((x) < 32) + (1U << (x)))
#define FLAG_SAFE(x) (1U << (x))
#define FLAG_UNSAFE(x) ((x) < 32 ? FLAG_SAFE(x) : 0)
#define FLAG_RANGE(x,y) (ASSERT_STATIC_EXPR_ZERO ((x) < (y)) + FLAG(y+1) - FLAG(x))
template <typename T, typename T2> static inline void
hb_stable_sort (T *array, unsigned int len, int(*compar)(const T *, const T *), T2 *array2)
{
for (unsigned int i = 1; i < len; i++)
{
unsigned int j = i;
while (j && compar (&array[j - 1], &array[i]) > 0)
j--;
if (i == j)
continue;
/* Move item i to occupy place for item j, shift what's in between. */
{
T t = array[i];
memmove (&array[j + 1], &array[j], (i - j) * sizeof (T));
array[j] = t;
}
if (array2)
{
T2 t = array2[i];
memmove (&array2[j + 1], &array2[j], (i - j) * sizeof (T2));
array2[j] = t;
}
}
}
template <typename T> static inline void
hb_stable_sort (T *array, unsigned int len, int(*compar)(const T *, const T *))
{
hb_stable_sort (array, len, compar, (int *) NULL);
}
static inline hb_bool_t
hb_codepoint_parse (const char *s, unsigned int len, int base, hb_codepoint_t *out)
{
/* Pain because we don't know whether s is nul-terminated. */
char buf[64];
len = MIN (ARRAY_LENGTH (buf) - 1, len);
strncpy (buf, s, len);
buf[len] = '\0';
char *end;
errno = 0;
unsigned long v = strtoul (buf, &end, base);
if (errno) return false;
if (*end) return false;
*out = v;
return true;
}
/* Global runtime options. */
struct hb_options_t
{
unsigned int initialized : 1;
unsigned int uniscribe_bug_compatible : 1;
};
union hb_options_union_t {
unsigned int i;
hb_options_t opts;
};
ASSERT_STATIC (sizeof (int) == sizeof (hb_options_union_t));
HB_INTERNAL void
_hb_options_init (void);
extern HB_INTERNAL hb_options_union_t _hb_options;
static inline hb_options_t
hb_options (void)
{
if (unlikely (!_hb_options.i))
_hb_options_init ();
return _hb_options.opts;
}
/* Size signifying variable-sized array */
#define VAR 1
#endif /* HB_PRIVATE_HH */
|