data.c revision a966c04f 
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/* $XFree86: xc/extras/Xpm/lib/data.c,v 1.3 2001/10/28 03:32:10 tsi Exp $ */
35
36/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
37
38#ifndef CXPMPROG
39#if 0
40/* Official version number */
41static char *RCS_Version = "$XpmVersion: 3.4k $";
42
43/* Internal version number */
44static char *RCS_Id = "Id: xpm.shar,v 3.71 1998/03/19 19:47:14 lehors Exp $";
45#endif
46#ifdef HAVE_CONFIG_H
47#include <config.h>
48#endif
49#include "XpmI.h"
50#endif
51#include <ctype.h>
52
53#ifndef CXPMPROG
54#define Getc(data, file) getc(file)
55#define Ungetc(data, c, file) ungetc(c, file)
56#endif
57
58static int
59ParseComment(xpmData *data)
60{
61    if (data->type == XPMBUFFER) {
62	register char c;
63	register unsigned int n = 0;
64	unsigned int notend;
65	char *s, *s2;
66
67	s = data->Comment;
68	*s = data->Bcmt[0];
69
70	/* skip the string beginning comment */
71	s2 = data->Bcmt;
72	do {
73	    c = *data->cptr++;
74	    *++s = c;
75	    n++;
76	    s2++;
77	} while (c == *s2 && *s2 != '\0' && c);
78
79	if (*s2 != '\0') {
80	    /* this wasn't the beginning of a comment */
81	    data->cptr -= n;
82	    return 0;
83	}
84	/* store comment */
85	data->Comment[0] = *s;
86	s = data->Comment;
87	notend = 1;
88	n = 0;
89	while (notend) {
90	    s2 = data->Ecmt;
91	    while (*s != *s2 && c) {
92		c = *data->cptr++;
93		if (n == XPMMAXCMTLEN - 1)  { /* forget it */
94		    s = data->Comment;
95		    n = 0;
96		}
97		*++s = c;
98		n++;
99	    }
100	    data->CommentLength = n;
101	    do {
102		c = *data->cptr++;
103		if (n == XPMMAXCMTLEN - 1)  { /* forget it */
104		    s = data->Comment;
105		    n = 0;
106		}
107		*++s = c;
108		n++;
109		s2++;
110	    } while (c == *s2 && *s2 != '\0' && c);
111	    if (*s2 == '\0') {
112		/* this is the end of the comment */
113		notend = 0;
114		data->cptr--;
115	    }
116	}
117	return 0;
118    } else {
119	FILE *file = data->stream.file;
120	register int c;
121	register unsigned int n = 0, a;
122	unsigned int notend;
123	char *s, *s2;
124
125	s = data->Comment;
126	*s = data->Bcmt[0];
127
128	/* skip the string beginning comment */
129	s2 = data->Bcmt;
130	do {
131	    c = Getc(data, file);
132	    *++s = c;
133	    n++;
134	    s2++;
135	} while (c == *s2 && *s2 != '\0' && c != EOF);
136
137	if (*s2 != '\0') {
138	    /* this wasn't the beginning of a comment */
139	    /* put characters back in the order that we got them */
140	    for (a = n; a > 0; a--, s--)
141		Ungetc(data, *s, file);
142	    return 0;
143	}
144	/* store comment */
145	data->Comment[0] = *s;
146	s = data->Comment;
147	notend = 1;
148	n = 0;
149	while (notend) {
150	    s2 = data->Ecmt;
151	    while (*s != *s2 && c != EOF) {
152		c = Getc(data, file);
153		if (n == XPMMAXCMTLEN - 1)  { /* forget it */
154		    s = data->Comment;
155		    n = 0;
156		}
157		*++s = c;
158		n++;
159	    }
160	    data->CommentLength = n;
161	    do {
162		c = Getc(data, file);
163		if (n == XPMMAXCMTLEN - 1)  { /* forget it */
164		    s = data->Comment;
165		    n = 0;
166		}
167		*++s = c;
168		n++;
169		s2++;
170	    } while (c == *s2 && *s2 != '\0' && c != EOF);
171	    if (*s2 == '\0') {
172		/* this is the end of the comment */
173		notend = 0;
174		Ungetc(data, *s, file);
175	    }
176	}
177	return 0;
178    }
179}
180
181/*
182 * skip to the end of the current string and the beginning of the next one
183 */
184int
185xpmNextString(data)
186    xpmData *data;
187{
188    if (!data->type)
189	data->cptr = (data->stream.data)[++data->line];
190    else if (data->type == XPMBUFFER) {
191	register char c;
192
193	/* get to the end of the current string */
194	if (data->Eos)
195	    while ((c = *data->cptr++) && c != data->Eos);
196
197	/*
198	 * then get to the beginning of the next string looking for possible
199	 * comment
200	 */
201	if (data->Bos) {
202	    while ((c = *data->cptr++) && c != data->Bos)
203		if (data->Bcmt && c == data->Bcmt[0])
204		    ParseComment(data);
205	} else if (data->Bcmt) {	/* XPM2 natural */
206	    while ((c = *data->cptr++) == data->Bcmt[0])
207		ParseComment(data);
208	    data->cptr--;
209	}
210    } else {
211	register int c;
212	FILE *file = data->stream.file;
213
214	/* get to the end of the current string */
215	if (data->Eos)
216	    while ((c = Getc(data, file)) != data->Eos && c != EOF);
217
218	/*
219	 * then get to the beginning of the next string looking for possible
220	 * comment
221	 */
222	if (data->Bos) {
223	    while ((c = Getc(data, file)) != data->Bos && c != EOF)
224		if (data->Bcmt && c == data->Bcmt[0])
225		    ParseComment(data);
226
227	} else if (data->Bcmt) {	/* XPM2 natural */
228	    while ((c = Getc(data, file)) == data->Bcmt[0])
229		ParseComment(data);
230	    Ungetc(data, c, file);
231	}
232    }
233    return 0;
234}
235
236
237/*
238 * skip whitespace and return the following word
239 */
240unsigned int
241xpmNextWord(data, buf, buflen)
242    xpmData *data;
243    char *buf;
244    unsigned int buflen;
245{
246    register unsigned int n = 0;
247    int c;
248
249    if (!data->type || data->type == XPMBUFFER) {
250	while (isspace(c = *data->cptr) && c != data->Eos)
251	    data->cptr++;
252	do {
253	    c = *data->cptr++;
254	    *buf++ = c;
255	    n++;
256	} while (!isspace(c) && c != data->Eos && n < buflen);
257	n--;
258	data->cptr--;
259    } else {
260	FILE *file = data->stream.file;
261
262	while ((c = Getc(data, file)) != EOF && isspace(c) && c != data->Eos);
263	while (!isspace(c) && c != data->Eos && c != EOF && n < buflen) {
264	    *buf++ = c;
265	    n++;
266	    c = Getc(data, file);
267	}
268	Ungetc(data, c, file);
269    }
270    return (n); /* this returns bytes read + 1 */
271}
272
273/*
274 * skip whitespace and compute the following unsigned int,
275 * returns 1 if one is found and 0 if not
276 */
277int
278xpmNextUI(data, ui_return)
279    xpmData *data;
280    unsigned int *ui_return;
281{
282    char buf[BUFSIZ];
283    int l;
284
285    l = xpmNextWord(data, buf, BUFSIZ);
286    return xpmatoui(buf, l, ui_return);
287}
288
289/*
290 * return end of string - WARNING: malloc!
291 */
292int
293xpmGetString(data, sptr, l)
294    xpmData *data;
295    char **sptr;
296    unsigned int *l;
297{
298    unsigned int i, n = 0;
299    int c;
300    char *p = NULL, *q, buf[BUFSIZ];
301
302    if (!data->type || data->type == XPMBUFFER) {
303	if (data->cptr) {
304	    char *start = data->cptr;
305	    while ((c = *data->cptr) && c != data->Eos)
306		data->cptr++;
307	    n = data->cptr - start + 1;
308	    p = (char *) XpmMalloc(n);
309	    if (!p)
310		return (XpmNoMemory);
311	    strncpy(p, start, n);
312	    if (data->type)		/* XPMBUFFER */
313		p[n - 1] = '\0';
314	}
315    } else {
316	FILE *file = data->stream.file;
317
318	if ((c = Getc(data, file)) == EOF)
319	    return (XpmFileInvalid);
320
321	i = 0;
322	q = buf;
323	p = (char *) XpmMalloc(1);
324	while (c != data->Eos && c != EOF) {
325	    if (i == BUFSIZ) {
326		/* get to the end of the buffer */
327		/* malloc needed memory */
328		q = (char *) XpmRealloc(p, n + i);
329		if (!q) {
330		    XpmFree(p);
331		    return (XpmNoMemory);
332		}
333		p = q;
334		q += n;
335		/* and copy what we already have */
336		strncpy(q, buf, i);
337		n += i;
338		i = 0;
339		q = buf;
340	    }
341	    *q++ = c;
342	    i++;
343	    c = Getc(data, file);
344	}
345	if (c == EOF) {
346	    XpmFree(p);
347	    return (XpmFileInvalid);
348	}
349	if (n + i != 0) {
350	    /* malloc needed memory */
351	    q = (char *) XpmRealloc(p, n + i + 1);
352	    if (!q) {
353		XpmFree(p);
354		return (XpmNoMemory);
355	    }
356	    p = q;
357	    q += n;
358	    /* and copy the buffer */
359	    strncpy(q, buf, i);
360	    n += i;
361	    p[n++] = '\0';
362	} else {
363	    *p = '\0';
364	    n = 1;
365	}
366	Ungetc(data, c, file);
367    }
368    *sptr = p;
369    *l = n;
370    return (XpmSuccess);
371}
372
373/*
374 * get the current comment line
375 */
376int
377xpmGetCmt(data, cmt)
378    xpmData *data;
379    char **cmt;
380{
381    if (!data->type)
382	*cmt = NULL;
383    else if (data->CommentLength != 0 && data->CommentLength < UINT_MAX - 1) {
384	if( (*cmt = (char *) XpmMalloc(data->CommentLength + 1)) == NULL)
385		return XpmNoMemory;
386	strncpy(*cmt, data->Comment, data->CommentLength);
387	(*cmt)[data->CommentLength] = '\0';
388	data->CommentLength = 0;
389    } else
390	*cmt = NULL;
391    return 0;
392}
393
394xpmDataType xpmDataTypes[] =
395{
396    {"", "!", "\n", '\0', '\n', "", "", "", ""},	/* Natural type */
397    {"C", "/*", "*/", '"', '"', ",\n", "static char *", "[] = {\n", "};\n"},
398    {"Lisp", ";", "\n", '"', '"', "\n", "(setq ", " '(\n", "))\n"},
399    {NULL, NULL, NULL, 0, 0, NULL, NULL, NULL, NULL}
400};
401
402/*
403 * parse xpm header
404 */
405int
406xpmParseHeader(data)
407    xpmData *data;
408{
409    char buf[BUFSIZ+1] = {0};
410    int l, n = 0;
411
412    if (data->type) {
413	data->Bos = '\0';
414	data->Eos = '\n';
415	data->Bcmt = data->Ecmt = NULL;
416	l = xpmNextWord(data, buf, BUFSIZ);
417	if (l == 7 && !strncmp("#define", buf, 7)) {
418	    /* this maybe an XPM 1 file */
419	    char *ptr;
420
421	    l = xpmNextWord(data, buf, BUFSIZ);
422	    if (!l)
423		return (XpmFileInvalid);
424	    buf[l] = '\0';
425	    ptr = strrchr(buf, '_');
426	    if (!ptr || strncmp("_format", ptr, l - (ptr - buf)))
427		return XpmFileInvalid;
428	    /* this is definitely an XPM 1 file */
429	    data->format = 1;
430	    n = 1;			/* handle XPM1 as mainly XPM2 C */
431	} else {
432
433	    /*
434	     * skip the first word, get the second one, and see if this is
435	     * XPM 2 or 3
436	     */
437	    l = xpmNextWord(data, buf, BUFSIZ);
438	    if ((l == 3 && !strncmp("XPM", buf, 3)) ||
439		(l == 4 && !strncmp("XPM2", buf, 4))) {
440		if (l == 3)
441		    n = 1;		/* handle XPM as XPM2 C */
442		else {
443		    /* get the type key word */
444		    l = xpmNextWord(data, buf, BUFSIZ);
445
446		    /*
447		     * get infos about this type
448		     */
449		    while (xpmDataTypes[n].type
450			   && strncmp(xpmDataTypes[n].type, buf, l))
451			n++;
452		}
453		data->format = 0;
454	    } else
455		/* nope this is not an XPM file */
456		return XpmFileInvalid;
457	}
458	if (xpmDataTypes[n].type) {
459	    if (n == 0) {		/* natural type */
460		data->Bcmt = xpmDataTypes[n].Bcmt;
461		data->Ecmt = xpmDataTypes[n].Ecmt;
462		xpmNextString(data);	/* skip the end of the headerline */
463		data->Bos = xpmDataTypes[n].Bos;
464		data->Eos = xpmDataTypes[n].Eos;
465	    } else {
466		data->Bcmt = xpmDataTypes[n].Bcmt;
467		data->Ecmt = xpmDataTypes[n].Ecmt;
468		if (!data->format) {	/* XPM 2 or 3 */
469		    data->Bos = xpmDataTypes[n].Bos;
470		    data->Eos = '\0';
471		    /* get to the beginning of the first string */
472		    xpmNextString(data);
473		    data->Eos = xpmDataTypes[n].Eos;
474		} else			/* XPM 1 skip end of line */
475		    xpmNextString(data);
476	    }
477	} else
478	    /* we don't know about that type of XPM file... */
479	    return XpmFileInvalid;
480    }
481    return XpmSuccess;
482}
483