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[wxWidgets.git] / src / xpm / dataxpm.c
1 /*
2 * Copyright (C) 1989-95 GROUPE BULL
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to
6 * deal in the Software without restriction, including without limitation the
7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8 * sell copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * Except as contained in this notice, the name of GROUPE BULL shall not be
22 * used in advertising or otherwise to promote the sale, use or other dealings
23 * in this Software without prior written authorization from GROUPE BULL.
24 */
25
26 /*****************************************************************************\
27 * data.c: *
28 * *
29 * XPM library *
30 * IO utilities *
31 * *
32 * Developed by Arnaud Le Hors *
33 \*****************************************************************************/
34
35 #ifndef CXPMPROG
36 /* Official version number */
37 static char *RCS_Version = "$XpmVersion: 3.4k $";
38
39 /* Internal version number */
40 static char *RCS_Id = "$Id$";
41
42 #include "XpmI.h"
43 #endif
44 #include <ctype.h>
45
46 #ifndef CXPMPROG
47 #define Getc(data, file) getc(file)
48 #define Ungetc(data, c, file) ungetc(c, file)
49 #endif
50
51 static int
52 ParseComment(data)
53 xpmData *data;
54 {
55 if (data->type == XPMBUFFER) {
56 register char c;
57 register unsigned int n = 0;
58 unsigned int notend;
59 char *s, *s2;
60
61 s = data->Comment;
62 *s = data->Bcmt[0];
63
64 /* skip the string beginning comment */
65 s2 = data->Bcmt;
66 do {
67 c = *data->cptr++;
68 *++s = c;
69 n++;
70 s2++;
71 } while (c == *s2 && *s2 != '\0' && c);
72
73 if (*s2 != '\0') {
74 /* this wasn't the beginning of a comment */
75 data->cptr -= n;
76 return 0;
77 }
78 /* store comment */
79 data->Comment[0] = *s;
80 s = data->Comment;
81 notend = 1;
82 n = 0;
83 while (notend) {
84 s2 = data->Ecmt;
85 while (*s != *s2 && c) {
86 c = *data->cptr++;
87 if (n == XPMMAXCMTLEN - 1) { /* forget it */
88 s = data->Comment;
89 n = 0;
90 }
91 *++s = c;
92 n++;
93 }
94 data->CommentLength = n;
95 do {
96 c = *data->cptr++;
97 if (n == XPMMAXCMTLEN - 1) { /* forget it */
98 s = data->Comment;
99 n = 0;
100 }
101 *++s = c;
102 n++;
103 s2++;
104 } while (c == *s2 && *s2 != '\0' && c);
105 if (*s2 == '\0') {
106 /* this is the end of the comment */
107 notend = 0;
108 data->cptr--;
109 }
110 }
111 return 0;
112 } else {
113 FILE *file = data->stream.file;
114 register int c;
115 register unsigned int n = 0, a;
116 unsigned int notend;
117 char *s, *s2;
118
119 s = data->Comment;
120 *s = data->Bcmt[0];
121
122 /* skip the string beginning comment */
123 s2 = data->Bcmt;
124 do {
125 c = Getc(data, file);
126 *++s = c;
127 n++;
128 s2++;
129 } while (c == *s2 && *s2 != '\0' && c != EOF);
130
131 if (*s2 != '\0') {
132 /* this wasn't the beginning of a comment */
133 /* put characters back in the order that we got them */
134 for (a = n; a > 0; a--, s--)
135 Ungetc(data, *s, file);
136 return 0;
137 }
138 /* store comment */
139 data->Comment[0] = *s;
140 s = data->Comment;
141 notend = 1;
142 n = 0;
143 while (notend) {
144 s2 = data->Ecmt;
145 while (*s != *s2 && c != EOF) {
146 c = Getc(data, file);
147 if (n == XPMMAXCMTLEN - 1) { /* forget it */
148 s = data->Comment;
149 n = 0;
150 }
151 *++s = c;
152 n++;
153 }
154 data->CommentLength = n;
155 do {
156 c = Getc(data, file);
157 if (n == XPMMAXCMTLEN - 1) { /* forget it */
158 s = data->Comment;
159 n = 0;
160 }
161 *++s = c;
162 n++;
163 s2++;
164 } while (c == *s2 && *s2 != '\0' && c != EOF);
165 if (*s2 == '\0') {
166 /* this is the end of the comment */
167 notend = 0;
168 Ungetc(data, *s, file);
169 }
170 }
171 return 0;
172 }
173 }
174
175 /*
176 * skip to the end of the current string and the beginning of the next one
177 */
178 int
179 xpmNextString(data)
180 xpmData *data;
181 {
182 if (!data->type)
183 data->cptr = (data->stream.data)[++data->line];
184 else if (data->type == XPMBUFFER) {
185 register char c;
186
187 /* get to the end of the current string */
188 if (data->Eos)
189 while ((c = *data->cptr++) && c != data->Eos);
190
191 /*
192 * then get to the beginning of the next string looking for possible
193 * comment
194 */
195 if (data->Bos) {
196 while ((c = *data->cptr++) && c != data->Bos)
197 if (data->Bcmt && c == data->Bcmt[0])
198 ParseComment(data);
199 } else if (data->Bcmt) { /* XPM2 natural */
200 while ((c = *data->cptr++) == data->Bcmt[0])
201 ParseComment(data);
202 data->cptr--;
203 }
204 } else {
205 register int c;
206 FILE *file = data->stream.file;
207
208 /* get to the end of the current string */
209 if (data->Eos)
210 while ((c = Getc(data, file)) != data->Eos && c != EOF);
211
212 /*
213 * then get to the beginning of the next string looking for possible
214 * comment
215 */
216 if (data->Bos) {
217 while ((c = Getc(data, file)) != data->Bos && c != EOF)
218 if (data->Bcmt && c == data->Bcmt[0])
219 ParseComment(data);
220
221 } else if (data->Bcmt) { /* XPM2 natural */
222 while ((c = Getc(data, file)) == data->Bcmt[0])
223 ParseComment(data);
224 Ungetc(data, c, file);
225 }
226 }
227 return 0;
228 }
229
230
231 /*
232 * skip whitespace and return the following word
233 */
234 unsigned int
235 xpmNextWord(data, buf, buflen)
236 xpmData *data;
237 char *buf;
238 unsigned int buflen;
239 {
240 register unsigned int n = 0;
241 int c;
242
243 if (!data->type || data->type == XPMBUFFER) {
244 while (isspace(c = *data->cptr) && c != data->Eos)
245 data->cptr++;
246 do {
247 c = *data->cptr++;
248 *buf++ = c;
249 n++;
250 } while (!isspace(c) && c != data->Eos && n < buflen);
251 n--;
252 data->cptr--;
253 } else {
254 FILE *file = data->stream.file;
255
256 while ((c = Getc(data, file)) != EOF && isspace(c) && c != data->Eos);
257 while (!isspace(c) && c != data->Eos && c != EOF && n < buflen) {
258 *buf++ = c;
259 n++;
260 c = Getc(data, file);
261 }
262 Ungetc(data, c, file);
263 }
264 return (n);
265 }
266
267 /*
268 * skip whitespace and compute the following unsigned int,
269 * returns 1 if one is found and 0 if not
270 */
271 int
272 xpmNextUI(data, ui_return)
273 xpmData *data;
274 unsigned int *ui_return;
275 {
276 char buf[BUFSIZ];
277 int l;
278
279 l = xpmNextWord(data, buf, BUFSIZ);
280 return xpmatoui(buf, l, ui_return);
281 }
282
283 /*
284 * return end of string - WARNING: malloc!
285 */
286 int
287 xpmGetString(data, sptr, l)
288 xpmData *data;
289 char **sptr;
290 unsigned int *l;
291 {
292 unsigned int i, n = 0;
293 int c;
294 char *p = NULL, *q, buf[BUFSIZ];
295
296 if (!data->type || data->type == XPMBUFFER) {
297 if (data->cptr) {
298 char *start = data->cptr;
299 while ((c = *data->cptr) && c != data->Eos)
300 data->cptr++;
301 n = data->cptr - start + 1;
302 p = (char *) XpmMalloc(n);
303 if (!p)
304 return (XpmNoMemory);
305 strncpy(p, start, n);
306 if (data->type) /* XPMBUFFER */
307 p[n - 1] = '\0';
308 }
309 } else {
310 FILE *file = data->stream.file;
311
312 if ((c = Getc(data, file)) == EOF)
313 return (XpmFileInvalid);
314
315 i = 0;
316 q = buf;
317 p = (char *) XpmMalloc(1);
318 while (c != data->Eos && c != EOF) {
319 if (i == BUFSIZ) {
320 /* get to the end of the buffer */
321 /* malloc needed memory */
322 q = (char *) XpmRealloc(p, n + i);
323 if (!q) {
324 XpmFree(p);
325 return (XpmNoMemory);
326 }
327 p = q;
328 q += n;
329 /* and copy what we already have */
330 strncpy(q, buf, i);
331 n += i;
332 i = 0;
333 q = buf;
334 }
335 *q++ = c;
336 i++;
337 c = Getc(data, file);
338 }
339 if (c == EOF) {
340 XpmFree(p);
341 return (XpmFileInvalid);
342 }
343 if (n + i != 0) {
344 /* malloc needed memory */
345 q = (char *) XpmRealloc(p, n + i + 1);
346 if (!q) {
347 XpmFree(p);
348 return (XpmNoMemory);
349 }
350 p = q;
351 q += n;
352 /* and copy the buffer */
353 strncpy(q, buf, i);
354 n += i;
355 p[n++] = '\0';
356 } else {
357 *p = '\0';
358 n = 1;
359 }
360 Ungetc(data, c, file);
361 }
362 *sptr = p;
363 *l = n;
364 return (XpmSuccess);
365 }
366
367 /*
368 * get the current comment line
369 */
370 int
371 xpmGetCmt(data, cmt)
372 xpmData *data;
373 char **cmt;
374 {
375 if (!data->type)
376 *cmt = NULL;
377 else if (data->CommentLength) {
378 *cmt = (char *) XpmMalloc(data->CommentLength + 1);
379 strncpy(*cmt, data->Comment, data->CommentLength);
380 (*cmt)[data->CommentLength] = '\0';
381 data->CommentLength = 0;
382 } else
383 *cmt = NULL;
384 return 0;
385 }
386
387 xpmDataType xpmDataTypes[] =
388 {
389 "", "!", "\n", '\0', '\n', "", "", "", "", /* Natural type */
390 "C", "/*", "*/", '"', '"', ",\n", "static char *", "[] = {\n", "};\n",
391 "Lisp", ";", "\n", '"', '"', "\n", "(setq ", " '(\n", "))\n",
392 #ifdef VMS
393 NULL
394 #else
395 NULL, NULL, NULL, 0, 0, NULL, NULL, NULL, NULL
396 #endif
397 };
398
399 /*
400 * parse xpm header
401 */
402 int
403 xpmParseHeader(data)
404 xpmData *data;
405 {
406 char buf[BUFSIZ];
407 int l, n = 0;
408
409 if (data->type) {
410 data->Bos = '\0';
411 data->Eos = '\n';
412 data->Bcmt = data->Ecmt = NULL;
413 l = xpmNextWord(data, buf, BUFSIZ);
414 if (l == 7 && !strncmp("#define", buf, 7)) {
415 /* this maybe an XPM 1 file */
416 char *ptr;
417
418 l = xpmNextWord(data, buf, BUFSIZ);
419 if (!l)
420 return (XpmFileInvalid);
421 buf[l] = '\0';
422 ptr = rindex(buf, '_');
423 if (!ptr || strncmp("_format", ptr, l - (ptr - buf)))
424 return XpmFileInvalid;
425 /* this is definitely an XPM 1 file */
426 data->format = 1;
427 n = 1; /* handle XPM1 as mainly XPM2 C */
428 } else {
429
430 /*
431 * skip the first word, get the second one, and see if this is
432 * XPM 2 or 3
433 */
434 l = xpmNextWord(data, buf, BUFSIZ);
435 if ((l == 3 && !strncmp("XPM", buf, 3)) ||
436 (l == 4 && !strncmp("XPM2", buf, 4))) {
437 if (l == 3)
438 n = 1; /* handle XPM as XPM2 C */
439 else {
440 /* get the type key word */
441 l = xpmNextWord(data, buf, BUFSIZ);
442
443 /*
444 * get infos about this type
445 */
446 while (xpmDataTypes[n].type
447 && strncmp(xpmDataTypes[n].type, buf, l))
448 n++;
449 }
450 data->format = 0;
451 } else
452 /* nope this is not an XPM file */
453 return XpmFileInvalid;
454 }
455 if (xpmDataTypes[n].type) {
456 if (n == 0) { /* natural type */
457 data->Bcmt = xpmDataTypes[n].Bcmt;
458 data->Ecmt = xpmDataTypes[n].Ecmt;
459 xpmNextString(data); /* skip the end of the headerline */
460 data->Bos = xpmDataTypes[n].Bos;
461 data->Eos = xpmDataTypes[n].Eos;
462 } else {
463 data->Bcmt = xpmDataTypes[n].Bcmt;
464 data->Ecmt = xpmDataTypes[n].Ecmt;
465 if (!data->format) { /* XPM 2 or 3 */
466 data->Bos = xpmDataTypes[n].Bos;
467 data->Eos = '\0';
468 /* get to the beginning of the first string */
469 xpmNextString(data);
470 data->Eos = xpmDataTypes[n].Eos;
471 } else /* XPM 1 skip end of line */
472 xpmNextString(data);
473 }
474 } else
475 /* we don't know about that type of XPM file... */
476 return XpmFileInvalid;
477 }
478 return XpmSuccess;
479 }
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