summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvipsk/finclude.c
blob: 1f38aec0f1c40ce1ddaaf58a2b6c431f0cf4ecf6 (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
/*
 *  Code for allowing fonts to be used in PostScript files given via
 *  `psfile=...'.
 *
 * Modified to check for font usage (DocumentFonts and DocumentNeededResources)
 * in all included postscript files. This information is added to the
 * global list of postscript fonts used (ps_fonts_used). Each font is
 * also looked up (from psfonts.map) and if a file needs to be downloaded
 * for that font, it is added (with add_header).
 * 11/1996 Aaron Sawdey
 */
#include "dvips.h" /* The copyright notice in that file is included too! */
#ifdef KPATHSEA
#include <kpathsea/c-ctype.h>
#else
#include <ctype.h>
#if !defined(SYSV) && !defined(WIN32)
extern char *strtok(); /* some systems don't have this in strings.h */
#endif
#define ISXGIGIT isxdigit
#endif
#ifdef VMS
#define getname vms_getname
#endif

#ifndef STDC_HEADERS
double atof();
#endif

/*
 *   The external declarations:
 */
#include "protos.h"

/*
 * Create a font descriptor for a font included in a psfile.  There will be
 * no fontmaptype node for the resulting font descriptor until this font is
 * encountered by fontdef() (if that ever happens).
 */
static fontdesctype *
ifontdef(char *name, char *area,
	 int scsize, int dssize, char *scname)
{
   fontdesctype *fp;

   fp = newfontdesc((integer)0, scsize, dssize, name, area);
   fp->scalename = scname;
   fp->next = fonthead;
   fonthead = fp;
   return fp;
}
/*
 * When a font appears in an included psfile for the first time, this routine
 * links it into the fonthd[] array.
 */
static void
setfamily(fontdesctype *f)
{
   int i;

   fontmem -= DICTITEMCOST;
   for (i=0; i<nextfonthd; i++)
      if (strcmp(f->name, fonthd[i]->name)==0
            && strcmp(f->area, fonthd[i]->area)==0) {
         f->nextsize = fonthd[i];
         fonthd[i] = f;
         return;
      }
   if (nextfonthd==MAXFONTHD)
      error("! Too many fonts in included psfiles");
   fontmem -= NAMECOST + strlen(f->name) + strlen(f->area);
   fonthd[nextfonthd++] = f;
   f->nextsize = NULL;
}
/*
 * Convert file name s to a pair of new strings in the string pool.
 * The first string is the original value of nextstring; the second
 * string is the return value.
 */
static char*
getname(char *s)
{
   char *a, *p, sav;

   a = NULL;
   for (p=s; *p!=0; p++)
      if (*p=='/')
         a = p+1;
   if (a==NULL) *nextstring++ = 0;
   else {   sav = *a;
      *a = 0;
      (void) newstring(s);
      *a = sav;
      s = a;
   }
   return newstring(s);
}
/*
 * Mark character usage in *f based on the hexadecimal bitmap found in
 * string s.  A two-digit offset separated by a colon gives the initial
 * character code.  We have no way of knowing how many times each character
 * is used or how many strings get created when showing the characters so
 * we just estimate two usages per character and one string per pair of
 * usages.
 */
static void
includechars(fontdesctype *f, char *s)
{
   int b, c, d;
   int l = strlen(s);

   while (l > 0 && (s[l-1] == '\n' || s[l-1] == '\r'))
      s[--l] = 0;
   if (!ISXDIGIT(s[0]) || !ISXDIGIT(s[1]) || s[2]!=':'
         || strspn(s+3,"0123456789ABCDEFabcdef") < l-3) {
      fprintf_str(stderr, "%s\n", s);
      error("Bad syntax in included font usage table");
      return;
   }
   c = (xdig[(int)(s[0])] << 4) + xdig[(int)(s[1])];
   s += 2;
   while (*++s) {
      d = xdig[(int)*s];
      for (b=8; b!=0; b>>=1) {
         if ((d&b)!=0) {
            pagecost ++;
            (void) prescanchar(&f->chardesc[c]);
         }
         if (++c==256) return;
      }
   }
}
/*
 * String p should be start after the ":" in a font declaration of the form
%*FONT: <tfm-name> <scaled-size> <design-size> <2-hex-digits>:<hex-string>
 * where the sizes are floating-point numbers in units of PostScript points
 * (TeX's "bp").  We update the data structures for the included font,
 * charge fontmem for the VM used, and add to delchar if necessary.
 * Note that the scaled size and the design size are multiplied by mag/1000.
 * This is needed for the design size to undo the similar factor in conv since
 * design sizes are not supposed to be affected by magnification.  Applying
 * the magnification factor to the scaled size selects magnified fonts as is
 * appropriate in the normal case where the included PostScript is scaled by
 * mag/1000.  The definition of `fshow' in finclude.lpro unscales by `DVImag'
 * to account for this.  We cannot change the font scaled size to account for
 * options like `hscale=' because then the definition of `fshow' would have
 * to change.
 */
static void
scan1fontcomment(char *p)
{
   char *q, *name, *area;
   char *scname;      /* location in buffer where we got scsize */
   integer scsize, dssize;
   fontdesctype *fptr;
   real DVIperBP;

   DVIperBP = actualdpi/(72.0*conv) * (mag/1000.0);
   p = strtok(p, " ");
   if (p==NULL) return;
   area = nextstring;   /* tentatively in the string pool */
   name = getname(p);
   q = strtok((char *)0, " ");
   if (p==NULL || (scsize=(integer)(atof(q)*DVIperBP))==0) {
      fprintf_str(stderr, "%s\n",p);
      error("No scaled size for included font");
      nextstring = area;   /* remove from string pool */
      return;
   }
   scname = q;
   q = strtok((char *)0, " ");
   if (p==NULL || (dssize=(integer)(atof(q)*DVIperBP))==0) {
      fprintf_str(stderr, "%s\n",p);
      error("No design size for included font");
      nextstring = area;
      return;
   }
   q = strtok((char *)0, " ");
   fptr = matchfont(name, area, scsize, scname);
   if (!fptr) {
      fptr = ifontdef(name, area, scsize, dssize, newstring(scname));
      (void) preselectfont(fptr);
      setfamily(fptr);
   } else {
      nextstring = area;   /* remove from string pool */
      (void) preselectfont(fptr);
      if (fptr->scalename==NULL) {
         fptr->scalename=newstring(scname);
         setfamily(fptr);
      }
   }
   includesfonts = 1;
   fptr->psflag |= THISPAGE;
   includechars(fptr, q);
}
/*
 * Parse the arguments to a "%%VMusage" comment.  The Adobe Type 1 Font Format
 * book specifies two arguments. This routine will accept one or two arguments;
 * if there are two arguments we take the maximum.
 */
static integer
scanvm(char *p)
{
   char* q;
   integer vm, vmmax;

   q = strtok(p, " ");
   if (q==NULL) {
      error("Missing data in VMusage comment");
      return 0;
   }
   vmmax = atol(q);
   q = strtok((char *)0, " ");
   if (q!=NULL && (vm=atol(q))>vmmax)
      vmmax = vm;
   return vmmax;
}
/*
 * Scan a list of font names.
 * Each name is added to the list ps_fonts_used, and if it has
 * an associated header file (from psfonts.map), the header file
 * is added with add_header.
 */
static void
scan_fontnames(char *str, const char *psfile)
{
  char *p,*pe;
  struct resfont *re;

  /* Turn all newlines, CRs, and tabs into spaces. */
  p = str;
  while(*p) {
    if(*p == '\r' || *p == '\n' || *p == '\t') *p = ' ';
    p++;
  }
  /* Remove trailing spaces. */
  p = str+strlen(str)-1;
  while(p > str && *p == ' ') {
    *p = '\0';
    p--;
  }

  p = str;
  while(*p == ' ') p++; /* skip leading whitespace */

  while(p && *p) {
     pe = strchr(p,' ');
     if(pe != NULL) *pe = '\0';

     add_name(p,&ps_fonts_used);

     if (1) {
#ifdef DEBUG
       if (dd(D_FONTS))
         fprintf_str(stderr,
		       "Adding font '%s' from included postscript file '%s'.\n",
		       p,psfile);
#endif  /* DEBUG */

       re = findPSname(p);
       if(re != NULL) {
         if (re->sent != 2) {
            if (re->Fontfile) {
               add_header(re->Fontfile);
            } else if (re->downloadheader) {
	/* this code borrowed from residentfont() in resident.c */
	      char *cp = re->downloadheader;
	      char *q;

	      infont = re->PSname;
	      while (1) {
	        q = cp;
	        while (*cp && *cp != ' ')
                  cp++;
  	        if (*cp) {
                  *cp = 0;
                  add_header(q);
                  *cp++ = ' ';
	        } else {
                  add_header(q);
                  break;
	        }
	        infont = 0;
	      }
            }
	    infont = 0;
          }
          re->sent = 2;
          if (unused_top_of_psnames < DOWNLOADEDPSSIZE) {
             downloadedpsnames[unused_top_of_psnames] = xstrdup (re->PSname);
             unused_top_of_psnames++;
          }
        } else {
          char eb[1000];
          snprintf(eb, sizeof(eb),
                   "Font %s used in file %s is not in the mapping file.",
                    p, psfile);
          error(eb);
        }
     }

     p = pe;
     if(p != NULL) {
       p++;
       while(*p == ' ') p++; /* skip leading whitespace */
     }
  }

  return;
}

/*
 * fc_state == 0: normal state, looking for interesting comments
 * fc_state == 1: looking for %%+ following %%DocumentFonts
 * fc_state == 2: looking for "%%+ font" following %%DocumentNeededResources
 */
static int fc_state = 0;
/*
 * Do we need to check for information at the end of the postscript file?
 */
static int check_atend = 0;

static void
scanfontusage(char *p, const char *psfile)
{
  if (strncmp(p, "%%DocumentFonts: ",17) == 0) {
    p += 17;
    while (*p && *p <= ' ')
       p++;
    if(!strncmp(p,"(atend)",7)) {
      check_atend = 1;
    } else {
      scan_fontnames(p,psfile);
      fc_state = 1;
    }
  } else if (strncmp(p, "%%DocumentNeededFonts: ",23)==0) {
    p += 23;
    while (*p && *p <= ' ')
       p++;
    if(!strncmp(p,"(atend)",7)) {
      check_atend = 1;
    } else {
      scan_fontnames(p,psfile);
      fc_state = 1;
    }
  } else if (fc_state == 1 && strncmp(p,"%%+",3) == 0) {
    scan_fontnames(p+3,psfile);
    fc_state = 1;
  } else if (strncmp(p, "%%DocumentNeededResources: ",27) == 0) {
    p += 27;
    while (*p && *p <= ' ')
       p++;
    if(!strncmp(p,"(atend)",7)) {
      check_atend = 1;
    } else {
      if(!strncmp(p,"font ",5)) scan_fontnames(p+5,psfile);
      fc_state = 2;
    }
  } else if (fc_state == 2 && strncmp(p,"%%+",3) == 0) {
    p += 3;
    while (*p && *p <= ' ')
       p++;
    if(!strncmp(p,"font ",5)) scan_fontnames(p+5,psfile);
    fc_state = 2;
  } else {
    fc_state = 0;
  }
  return;
}

/*
 * Scan an initial sequence of comment lines looking for font and memory
 * usage specifications.  This does not handle the "atend" construction.
 */
void
scanfontcomments(const char *filename)
{
   char p[500];
   char *r;
   FILE *f;
   integer truecost = pagecost;
   Boolean trueknown = 0;
   fontdesctype *oldcf = curfnt;

#ifdef DEBUG
      if (dd(D_FONTS))
         fprintf_str(stderr,
		       "Checking for fonts in '%s'\n",filename);
#endif  /* DEBUG */

   if (*filename == '`') {
/*
 *   Allow scanning of ` commands.  Better return same results both times.
 */
      f = popen(filename+1, "r");
      SET_BINARY(fileno(f));
      to_close = USE_PCLOSE;
   } else {
      f = search(figpath, filename, READ);
   }
   if (f) {
     SET_BINARY(fileno(f));
     fc_state = 0;
     check_atend = 0;
     while (fgets(p,500,f) && p[0]=='%' &&
            (p[1]=='!' || p[1]=='%' || p[1]=='*')) {
       if (strncmp(p, "%*Font:", 7) == 0) {
	 scan1fontcomment(p+7);
       } else if (strncmp(p, "%%VMusage:", 9) == 0) {
	 truecost += scanvm(p+10);
	 trueknown = 1;
       }
       scanfontusage(p,filename);
     }
     if (trueknown)
       pagecost = truecost;

     if(check_atend) {
#ifdef DEBUG
       if (dd(D_FONTS))
         fprintf_str(stderr,
		       "Checking for (atend) fonts in '%s'\n",filename);
#endif  /* DEBUG */

       fc_state = 0;

       fseek(f,-4096,2); /* seek to 4096 bytes before EOF. */
       fgets(p,500,f); /* throw away a partial line. */

       /* find %%Trailer */
       while((r=fgets(p,500,f)) && strncmp(p,"%%Trailer",9));

       /* look for specs that were deferred to the trailer. */
       if(r != NULL) {
	 while(fgets(p,500,f)) {
	   if(p[0]=='%' && p[1]=='%') scanfontusage(p,filename);
	 }
       }
#ifdef DEBUG
       else { /* r == NULL */
	 if (dd(D_FONTS))
         fprintf_str(stderr,
		       "Did not find %%%%Trailer in included file '%s'.\n",
		       filename);
       }
#endif  /* DEBUG */
     }
     close_file(f);
   }
   curfnt = oldcf;
}
/*
 * Is string s less than 30 characters long with no special characters
 * that are not allowed in PostScript commands.
 */
static Boolean
okascmd(char *ss)
{
   register int c = 0;
   register char *s = ss;

   while (*s)
      if (*s<' ' || *s>126 || ++c==30)
         return(0);
   return(strcspn(ss,"()<>[]{}%/") == c);
}
/*
 * Output font area and font name strings as a literal string
 */
static void
nameout(char *area, char *name)
{
   char buf[500];
   char *s;

   if (*area==0 && okascmd(name)) {
      snprintf(buf, sizeof(buf), "/%s", name);
      cmdout(name);
   } else {
      for (s=area; *s; s++)
         scout(*s);
      for (s=name; *s; s++)
         scout(*s);
      stringend();
      cmdout("cvn");
   }
}
/*
 * Output commands for defining a table of PostScript font identifiers for
 * fonts used in included psfiles in the current section.
 */
void
fonttableout(void)
{
   int i, k;
   fontdesctype *f;

   for (i=0; i<nextfonthd; i++) {
      for (f=fonthd[i]; f!=NULL; f=f->nextsize)
         if (f->psflag==EXISTS) break;
      if (f!=NULL) {
         nameout(f->area, f->name);
         k = 0;
         do {
            if (f->psflag==EXISTS) {
               cmdout(f->scalename);
               lfontout((int)f->psname);
               k++;
            }
            f = f->nextsize;
         } while (f!=NULL);
         numout((integer)k);
         cmdout("fstore");
      }
   }
}