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
|
(* This module initializes the DVI file parameter and command line options.
Highly SYSDEP!
*)
#include 'globals.h';
#include 'options.h';
VAR
option : CHAR; (* current command option *)
value : string; (* current option's value *)
vlength : INTEGER; (* current value's length *)
argnum : INTEGER; (* 0..argc-1; used in argv calls *)
FUNCTION sscanf (VAR s, format : string; VAR r : real) : integer;
EXTERNAL;
(******************************************************************************)
FUNCTION Cap (ch : CHAR) : CHAR;
(* If ch is in 'a'..'z' then return capitalized letter else return ch. *)
BEGIN
IF (ch < 'a') OR (ch > 'z') THEN Cap := ch ELSE Cap := CHR(ORD(ch) - 32);
END; (* Cap *)
(******************************************************************************)
FUNCTION Len (str : string) : INTEGER;
(* Return length of given string, assumed to be padded with blanks. *)
LABEL 888;
VAR i : INTEGER;
BEGIN
i := maxstring;
WHILE i > 0 DO BEGIN
IF str[i-1] <> ' ' THEN goto 888;
i := i - 1;
END;
888:
Len := i;
END; (* Len *)
(******************************************************************************)
FUNCTION ExplicitExt (fname : string; len : INTEGER) : BOOLEAN;
(* SYSDEP: Check for an extension of the form ".*" where * is any string
not containing "/". len is length of fname.
If "." found then TRUE is returned, otherwise FALSE.
*)
LABEL 999;
BEGIN
WHILE len > 0 DO BEGIN (* search backwards looking for . *)
len := len - 1;
IF fname[len] = '/' THEN BEGIN (* handle file names like ../myfiles/foo *)
ExplicitExt := FALSE;
goto 999;
END
ELSE IF fname[len] = '.' THEN BEGIN
ExplicitExt := TRUE;
goto 999;
END;
END;
ExplicitExt := FALSE;
999:
END; (* ExplicitExt *)
(******************************************************************************)
PROCEDURE GetValue;
(* Get parameter following current option and store in value. *)
VAR i : integer;
BEGIN
IF vlength > 2 THEN BEGIN (* allow things like -m1000 *)
FOR i := 0 TO vlength - 1 DO
value[i] := value[i+2]; (* shift value left 2 places *)
vlength := vlength - 2;
END
ELSE BEGIN
(* option should be followed by value *)
value := ' ';
IF argnum < argc THEN argv(argnum,value);
vlength := Len(value); (* 0 if no more args *)
argnum := argnum + 1;
IF vlength <= 0 THEN BEGIN
writeln('Missing value after -',option);
exit(1);
END;
END;
END; (* GetValue *)
(******************************************************************************)
PROCEDURE GetCardinal (VAR n : INTEGER);
(* If current value represents a positive integer then return via n. *)
VAR result : integer; r : real; fmt : string;
BEGIN
fmt := '%f';
result := sscanf(value,fmt,r);
n := trunc(r);
IF (ABS(result) <> 1) OR (n <= 0) THEN BEGIN
writeln('Bad -',option,' value: ',value:vlength);
writeln('Specify a positive integer.');
exit(1);
END;
END; (* GetCardinal *)
(******************************************************************************)
PROCEDURE GetPosDimen (VAR r : REAL; VAR un : validunits);
(* A valid +ve dimension consists of a positive integer or real number followed
by a two-letter unit: cm, mm, in, pc, pt, bp or px (or in uppercase).
If current value represents a valid +ve dimension, we return number part
in r and validunits part in un.
*)
VAR i, result : INTEGER; ch1, ch2 : CHAR; fmt : string;
BEGIN
(* extract un *)
IF vlength > 1 THEN i := vlength-1 ELSE i := 1;
IF (Cap(value[i-1]) = 'I') AND (Cap(value[i]) = 'N') THEN
un := ic
ELSE IF (Cap(value[i-1]) = 'C') AND (Cap(value[i]) = 'M') THEN
un := cm
ELSE IF (Cap(value[i-1]) = 'M') AND (Cap(value[i]) = 'M') THEN
un := mm
ELSE IF (Cap(value[i-1]) = 'P') AND (Cap(value[i]) = 'C') THEN
un := pc
ELSE IF (Cap(value[i-1]) = 'P') AND (Cap(value[i]) = 'T') THEN
un := pt
ELSE IF (Cap(value[i-1]) = 'B') AND (Cap(value[i]) = 'P') THEN
un := bp
ELSE IF (Cap(value[i-1]) = 'P') AND (Cap(value[i]) = 'X') THEN
un := px
ELSE BEGIN
writeln('Bad units in -',option,' value: ',value:vlength);
writeln('Last two letters should be cm, mm, in, pc, pt, bp or px.');
exit(1);
END;
ch1 := value[i-1]; (* remember letters in units *)
ch2 := value[i];
value[i] := ' '; (* remove units *)
value[i-1] := ' ';
fmt := '%f';
result := sscanf(value,fmt,r);
IF (ABS(result) <> 1) OR (r <= 0.0) THEN BEGIN
value[i-1] := ch1; (* restore units *)
value[i] := ch2;
writeln('Bad -',option,' value: ',value:vlength);
writeln('Specify a positive dimension.');
exit(1);
END;
END; (* GetPosDimen *)
(******************************************************************************)
PROCEDURE GetDimen (VAR r : REAL; VAR un : validunits);
(* A valid dimension consists of an integer or real number followed
by a two-letter unit: cm, mm, in, pc, pt, bp or px (or in uppercase).
If current value represents a valid dimension, we return number part
in r and validunits part in un.
*)
VAR i, result : INTEGER; ch1, ch2 : CHAR; fmt : string;
BEGIN
(* extract un *)
IF vlength > 1 THEN i := vlength-1 ELSE i := 1;
IF (Cap(value[i-1]) = 'I') AND (Cap(value[i]) = 'N') THEN
un := ic
ELSE IF (Cap(value[i-1]) = 'C') AND (Cap(value[i]) = 'M') THEN
un := cm
ELSE IF (Cap(value[i-1]) = 'M') AND (Cap(value[i]) = 'M') THEN
un := mm
ELSE IF (Cap(value[i-1]) = 'P') AND (Cap(value[i]) = 'C') THEN
un := pc
ELSE IF (Cap(value[i-1]) = 'P') AND (Cap(value[i]) = 'T') THEN
un := pt
ELSE IF (Cap(value[i-1]) = 'B') AND (Cap(value[i]) = 'P') THEN
un := bp
ELSE IF (Cap(value[i-1]) = 'P') AND (Cap(value[i]) = 'X') THEN
un := px
ELSE BEGIN
writeln('Bad units in -',option,' value: ',value:vlength);
writeln('Last two letters should be cm, mm, in, pc, pt, bp or px.');
exit(1);
END;
ch1 := value[i-1]; (* remember letters in units *)
ch2 := value[i];
value[i] := ' '; (* remove units *)
value[i-1] := ' ';
fmt := '%f';
result := sscanf(value,fmt,r);
IF (ABS(result) <> 1) THEN BEGIN
value[i-1] := ch1; (* restore units *)
value[i] := ch2;
writeln('Bad -',option,' value: ',value:vlength);
writeln('Specify a dimension.');
exit(1);
END;
END; (* GetDimen *)
(******************************************************************************)
PROCEDURE GetUnits;
(* Make sure current value is valid and set units if so. *)
VAR ch1, ch2 : CHAR;
BEGIN
ch1 := Cap(value[0]);
ch2 := Cap(value[1]);
IF (ch1 = 'I') AND (ch2 = 'N') THEN
units := ic
ELSE IF (ch1 = 'C') AND (ch2 = 'M') THEN
units := cm
ELSE IF (ch1 = 'M') AND (ch2 = 'M') THEN
units := mm
ELSE IF (ch1 = 'P') AND (ch2 = 'C') THEN
units := pc
ELSE IF (ch1 = 'P') AND (ch2 = 'T') THEN
units := pt
ELSE IF (ch1 = 'B') AND (ch2 = 'P') THEN
units := bp
ELSE IF (ch1 = 'P') AND (ch2 = 'X') THEN
units := px
ELSE BEGIN
writeln('Bad -',option,' value: ',value:vlength);
writeln('Specify cm, mm, in, pc, pt, bp or px.');
exit(1);
END;
END; (* GetUnits *)
(******************************************************************************)
PROCEDURE GetPages;
(* Parse -p value. If valid then subrange will become TRUE.
-p can have any value of the form "first:final" where first and/or
final can be a DVI page (positive integer), or TeX page ([i0. ... .i9]),
or empty. If first empty then firstDVIpage = 1; if final empty then
finalDVIpage = maxint. If ":final" is omitted then
finalDVIpage = firstDVIpage.
If first/final is a TeX page specification (i.e., starts with '[')
then first/finalDVIpage is set to 0 and first/finalTeXpage contains the
given string (and parsing is done by the main module).
*)
LABEL 888;
VAR i, j, result : INTEGER; r : real; fmt : string;
BEGIN
subrange := TRUE;
firstTeXpage := ' ';
finalTeXpage := ' ';
i := 0;
(* extract first page *)
WHILE i < vlength DO BEGIN
IF value[i] = ':' THEN goto 888;
firstTeXpage[i] := value[i];
i := i + 1;
END;
888:
IF value[0] = ':' THEN (* first page not given *)
firstDVIpage := 1
ELSE IF firstTeXpage[0] = '[' THEN (* TeX page given *)
firstDVIpage := 0
ELSE BEGIN (* DVI page given *)
fmt := '%f';
result := sscanf(firstTeXpage,fmt,r);
firstDVIpage := trunc(r);
IF (ABS(result) <> 1) OR (firstDVIpage <= 0) THEN BEGIN
writeln('Bad first page in -',option,' value: ',value:vlength);
writeln('Specify a positive integer.');
exit(1);
END;
END;
IF i = vlength THEN BEGIN (* no colon; n or [t] *)
IF firstTeXpage[0] = '[' THEN BEGIN
finalTeXpage := firstTeXpage; (* [t] = [t]:[t] *)
finalDVIpage := 0;
END
ELSE
finalDVIpage := firstDVIpage; (* n = n:n *)
END
ELSE BEGIN (* value[i] = ':' *)
i := i + 1;
j := 0;
WHILE i < vlength DO BEGIN (* extract final page *)
finalTeXpage[j] := value[i];
i := i + 1;
j := j + 1;
END;
IF j = 0 THEN (* no page after ':' *)
finalDVIpage := maxint
ELSE IF finalTeXpage[0] = '[' THEN (* TeX page given *)
finalDVIpage := 0
ELSE BEGIN (* DVI page given *)
fmt := '%f';
result := sscanf(finalTeXpage,fmt,r);
finalDVIpage := trunc(r);
IF (ABS(result) <> 1) OR (finalDVIpage <= 0) THEN BEGIN
writeln('Bad final page in -',option,' value: ',value:vlength);
writeln('Specify a positive integer.');
exit(1);
END;
END;
END;
END; (* GetPages *)
(******************************************************************************)
FUNCTION DimenPixels (r : REAL; u : validunits) : INTEGER;
(* Return given dimension in terms of pixels. *)
BEGIN
CASE u OF
ic : DimenPixels := TRUNC(r * resolution + 0.5);
cm : DimenPixels := TRUNC((r / 2.54) * resolution + 0.5);
mm : DimenPixels := TRUNC((r / 25.4) * resolution + 0.5);
bp : DimenPixels := TRUNC((r / 72.0) * resolution + 0.5);
pt : DimenPixels := TRUNC((r / 72.27) * resolution + 0.5);
pc : DimenPixels := TRUNC((r / 72.27) * 12.0 * resolution + 0.5);
px : DimenPixels := TRUNC(r + 0.5)
END;
END; (* DimenPixels *)
(******************************************************************************)
PROCEDURE InitOptions;
(* Get DVI file and any options from command line.
If an option appears more than once then we return the last value.
*)
VAR
hoffu, voffu, xu, yu : validunits;
hoffr, voffr, xr, yr : REAL;
landscape : boolean;
temp, strlen, i : integer;
str : string;
BEGIN
(* initialize option values with defaults; note that the psprint script can
set up different defaults
*)
resolution := 300; (* LaserWriter resolution *)
hoffu := ic;
voffu := ic;
hoffr := 0.0; (* no margin shifting *)
voffr := 0.0;
xu := ic; (* paper dimensions in inches *)
yu := ic;
xr := 8.3; (* A4 paper is 8.3" wide *)
yr := 11.7; (* A4 paper is 11.7" high *)
mag := 0; (* use DVI mag *)
fontdir := '/tex/pk/'; (* location of PK files *)
dummyfont := 'cmr10.300pk'; (* typical font *)
tfmdir := '/tex/fonts/'; (* location of PS TFM files *)
psprefix := 'ps-'; (* prefix in PS font names *)
DVIname := ' '; (* SYSDEP: empty string *)
(* above are same as DVItoVDU options *)
header := '/usr/users/applied/staff/atrevorr/psdvi/tex.ps';
PSname := 'out.ps'; (* output file (-o) *)
units := ic; (* inches (-u) *)
stats := FALSE; (* display stats? (-s) *)
reverse := FALSE; (* reverse page order? (-b) *)
conserveVM := FALSE; (* conserve VM? (-c) *)
landscape := FALSE; (* reverse -x and -y? (-l) *)
subrange := FALSE; (* -p value given? *)
firstDVIpage := 0;
finalDVIpage := 0;
firstTeXpage := '[]';
finalTeXpage := '[]';
argnum := 1; (* 0 is command *)
WHILE argnum < argc DO BEGIN
value := ' ';
argv(argnum,value);
vlength := Len(value);
argnum := argnum + 1;
IF value[0] = '-' THEN BEGIN
IF vlength > 1 THEN option := value[1] ELSE option := ' ';
CASE option OF
'r' : BEGIN GetValue; GetCardinal(resolution); END;
'm' : BEGIN GetValue; GetCardinal(mag); END;
'i' : BEGIN GetValue; GetCardinal(increment); END;
'x' : BEGIN GetValue; GetPosDimen(xr,xu); END;
'y' : BEGIN GetValue; GetPosDimen(yr,yu); END;
'H' : BEGIN GetValue; GetDimen(hoffr,hoffu); END;
'V' : BEGIN GetValue; GetDimen(voffr,voffu); END;
'T' : BEGIN GetValue; tfmdir := value; END;
'P' : BEGIN GetValue; psprefix := value; END;
'd' : BEGIN GetValue; dummyfont := value; END;
'f' : BEGIN GetValue; fontdir := value; END;
'h' : BEGIN GetValue; header := value; END;
'o' : BEGIN GetValue; PSname := value; END;
'u' : BEGIN GetValue; GetUnits; END;
'p' : BEGIN GetValue; GetPages; END;
's' : stats := TRUE;
'b' : reverse := TRUE;
'c' : conserveVM := TRUE;
'l' : landscape := TRUE;
(* bad string values will be detected in other modules *)
OTHERWISE
writeln('Unknown option: -',option);
exit(1);
END;
END
ELSE BEGIN
(* value doesn't start with '-', so assume it is DVI file *)
DVIname := value;
IF NOT ExplicitExt(DVIname,vlength) THEN (* append .dvi *)
IF vlength + 3 < maxstring THEN BEGIN
DVIname[vlength] := '.';
DVIname[vlength+1] := 'd';
DVIname[vlength+2] := 'v';
DVIname[vlength+3] := 'i';
END
ELSE BEGIN (* user has given a mighty long file name *)
writeln('DVI file name too long: ',DVIname:maxstring);
exit(1);
END;
(* bad DVIname will be detected upon open in main module *)
END;
END;
IF DVIname[0] = ' ' THEN BEGIN (* no file name on command line *)
writeln('DVI file not given!');
exit(1);
END;
(* prepend fontdir to dummyfont *)
str := fontdir;
strlen := Len(fontdir);
FOR i := 1 TO Len(dummyfont) DO BEGIN
IF strlen < maxstring THEN BEGIN
str[strlen] := dummyfont[i-1];
strlen := strlen + 1;
END;
END;
dummyfont := str;
(* set h/voffset and paperwd/ht only after resolution has been decided *)
hoffset := DimenPixels(hoffr,hoffu);
voffset := DimenPixels(voffr,voffu);
paperwd := DimenPixels(xr,xu);
paperht := DimenPixels(yr,yu);
IF landscape THEN BEGIN (* swap paperwd and paperht *)
temp := paperwd;
paperwd := paperht;
paperht := temp;
END;
IF increment = 0 THEN increment := 1; (* do normal page selection *)
END; (* InitOptions *)
|