Convert-UUlib/uulib/fptools.c

/*
 * fptools.c, some helper functions for getcgi.c and uu(en|de)view
 *
 * Distributed by the GNU General Public License. Use and be happy.
 * Read http://www.uni-frankfurt.de/~fp/Tools/Getcgi.html for more
 * information.                     fp@informatik.uni-frankfurt.de
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef SYSTEM_WINDLL
#include <windows.h>
#endif
#ifdef SYSTEM_OS2
#include <os2.h>
#endif

/*
 * This file provides replacements for some handy functions that aren't
 * available on all systems, like most of the <string.h> functions. They
 * should behave exactly as their counterparts. There are also extensions
 * that aren't portable at all (like strirstr etc.).
 * The proper behaviour in a configure script is as follows:
 *    AC_CHECK_FUNC(strrchr,AC_DEFINE(strrchr,FP_strrchr))
 * This way, the (probably less efficient) replacements will only be used
 * where it is not provided by the default libraries. Be aware that this
 * does not work with replacements that just shadow wrong behaviour (like
 * FP_free) or provide extended functionality (FP_gets).
 * The above is not used in the uuenview/uudeview configuration script,
 * since both only use the replacement functions in non-performance-cri-
 * tical sections (except for FP_tempnam and FP_strerror, where some
 * functionality of the original would be lost).
 */

#include <stdio.h>
#include <ctype.h>

#ifdef STDC_HEADERS
#include <stdlib.h>
#include <string.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif

#include <fptools.h>

#if 0
#ifdef SYSTEM_WINDLL
BOOL _export WINAPI
DllEntryPoint (HINSTANCE hInstance, DWORD seginfo,
               LPVOID lpCmdLine)
{
  /* Don't do anything, so just return true */
  return TRUE;
}
#endif
#endif

char * fptools_id = "$Id: fptools.c,v 1.4 1996/09/10 18:45:07 fp Exp $";

/*
 * some versions of free can't handle a NULL pointer properly
 * (ANSI says, free ignores a NULL pointer, but some machines
 * prefer to SIGSEGV on it)
 */

void TOOLEXPORT
FP_free (void *ptr)
{
  if (ptr) free (ptr);
}

/*
 * This is non-standard, so I'm defining my own
 */

char * TOOLEXPORT
FP_strdup (char *string)
{
  char *result;

  if (string == NULL)
    return NULL;

  if ((result = (char *) malloc (strlen (string) + 1)) == NULL)
    return NULL;

  strcpy (result, string);
  return result;
}

/*
 * limited-length string copy. this function behaves differently from
 * the original in that the dest string is always terminated with a
 * NULL character.
 */

char * TOOLEXPORT
FP_strncpy (char *dest, char *src, int length)
{
  char *odest=dest;
  if (src == NULL || dest == NULL || length-- <= 0)
    return dest;

  while (length-- && *src)
    *dest++ = *src++;

  *dest++ = '\0';
  return odest;
}

/*
 * duplicate a memory area
 */

void * TOOLEXPORT
FP_memdup (void *ptr, int len)
{
  void *result;

  if (ptr == NULL)
    return NULL;

  if ((result = malloc (len)) == NULL)
    return NULL;

  memcpy (result, ptr, len);
  return result;
}

/*
 * case-insensitive compare
 */

int TOOLEXPORT
FP_stricmp (char *str1, char *str2)
{
  if (str1==NULL || str2==NULL)
    return -1;

  while (*str1) {
    if (tolower(*str1) != tolower(*str2))
      break;
    str1++;
    str2++;
  }
  return (tolower (*str1) - tolower (*str2));
}

int TOOLEXPORT
FP_strnicmp (char *str1, char *str2, int count)
{
  if (str1==NULL || str2==NULL)
    return -1;

  while (*str1 && count) {
    if (tolower(*str1) != tolower(*str2))
      break;
    str1++;
    str2++;
    count--;
  }
  return count ? (tolower (*str1) - tolower (*str2)) : 0;
}

/*
 * autoconf says this function might be a compatibility problem
 */

char * TOOLEXPORT
FP_strstr (char *str1, char *str2)
{
  char *ptr1, *ptr2;

  if (str1==NULL)
    return NULL;
  if (str2==NULL)
    return str1;

  while (*(ptr1=str1)) {
    for (ptr2=str2;
         *ptr1 && *ptr2 && *ptr1==*ptr2;
         ptr1++, ptr2++)
      /* empty loop */ ;

    if (*ptr2 == '\0')
      return str1;
    str1++;
  }
  return NULL;
}

char * TOOLEXPORT
FP_strpbrk (char *str, char *accept)
{
  char *ptr;

  if (str == NULL)
    return NULL;
  if (accept == NULL || *accept == '\0')
    return str;

  for (; *str; str++)
    for (ptr=accept; *ptr; ptr++)
      if (*str == *ptr)
        return str;

  return NULL;
}

/*
 * autoconf also complains about this one
 */

char * TOOLEXPORT
FP_strtok (char *str1, char *str2)
{
  static char *optr;
  char *ptr;

  if (str2 == NULL)
    return NULL;

  if (str1) {
    optr = str1;
  }
  else {
    if (*optr == '\0')
      return NULL;
  }

  while (*optr && strchr (str2, *optr)) /* look for beginning of token */
    optr++;

  if (*optr == '\0')                    /* no token found */
    return NULL;

  ptr = optr;
  while (*optr && strchr (str2, *optr) == NULL) /* look for end of token */
    optr++;

  if (*optr) {
    *optr++ = '\0';
  }
  return ptr;
}

/*
 * case insensitive strstr.
 */

char * TOOLEXPORT
FP_stristr (char *str1, char *str2)
{
  char *ptr1, *ptr2;

  if (str1==NULL)
    return NULL;
  if (str2==NULL)
    return str1;

  while (*(ptr1=str1)) {
    for (ptr2=str2;
         *ptr1 && *ptr2 && tolower(*ptr1)==tolower(*ptr2);
         ptr1++, ptr2++)
      /* empty loop */ ;

    if (*ptr2 == '\0')
      return str1;
    str1++;
  }
  return NULL;
}

/*
 * Nice fake of the real (non-standard) one
 */

char * TOOLEXPORT
FP_strrstr (char *ptr, char *str)
{
  char *found=NULL, *new, *iter=ptr;

  if (ptr==NULL || str==NULL)
    return NULL;

  if (*str == '\0')
    return ptr;

  while ((new = FP_strstr (iter, str)) != NULL) {
    found = new;
    iter  = new + 1;
  }
  return found;
}

char * TOOLEXPORT
FP_strirstr (char *ptr, char *str)
{
  char *found=NULL, *iter=ptr, *new;

  if (ptr==NULL || str==NULL)
    return NULL;
  if (*str == '\0')
    return ptr;

  while ((new = FP_stristr (iter, str)) != NULL) {
    found = new;
    iter  = new + 1;
  }
  return found;
}

/*
 * convert whole string to case
 */

char * TOOLEXPORT
FP_stoupper (char *input)
{
  char *iter = input;

  if (input == NULL)
    return NULL;

  while (*iter) {
    *iter = toupper (*iter);
    iter++;
  }
  return input;
}

char * TOOLEXPORT
FP_stolower (char *input)
{
  char *iter = input;

  if (input == NULL)
    return NULL;

  while (*iter) {
    *iter = tolower (*iter);
    iter++;
  }
  return input;
}

/*
 * string matching with wildcards
 */

int TOOLEXPORT
FP_strmatch (char *string, char *pattern)
{
  char *p1 = string, *p2 = pattern;

  if (pattern==NULL || string==NULL)
    return 0;

  while (*p1 && *p2) {
    if (*p2 == '?') {
      p1++; p2++;
    }
    else if (*p2 == '*') {
      if (*++p2 == '\0')
        return 1;
      while (*p1 && *p1 != *p2)
        p1++;
    }
    else if (*p1 == *p2) {
      p1++; p2++;
    }
    else
      return 0;
  }
  if (*p1 || *p2)
    return 0;

  return 1;
}

char * TOOLEXPORT
FP_strrchr (char *string, int tc)
{
  char *ptr;

  if (string == NULL)
    return NULL;

  ptr = string + strlen (string) - 1;

  while (ptr != string && *ptr != tc)
    ptr--;

  if (*ptr == tc)
    return ptr;

  return NULL;
}

/*
 * strip directory information from a filename. Works only on DOS and
 * Unix systems so far ...
 */

char * TOOLEXPORT
FP_cutdir (char *filename)
{
  char *ptr;

  if (filename == NULL)
    return NULL;

  if ((ptr = FP_strrchr (filename, '/')) != NULL)
    ptr++;
  else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
    ptr++;
  else
    ptr = filename;

  return ptr;
}

/*
 * My own fgets function. It handles all kinds of line terminators
 * properly: LF (Unix), CRLF (DOS) and CR (Mac). In all cases, the
 * terminator is replaced by a single LF
 */

char * TOOLEXPORT
FP_fgets (char *buf, int n, FILE *stream)
{
  char *obp = buf;
  int c;

  if (feof (stream))
    return NULL;

  while (--n) {
    if ((c = fgetc (stream)) == EOF) {
      if (ferror (stream))
        return NULL;
      else {
        if (obp == buf)
          return NULL;
        *buf = '\0';
        return obp;
      }
    }
    if (c == '\015') { /* CR */
      /*
       * Peek next character. If it's no LF, push it back.
       * ungetc(EOF, stream) is handled correctly according
       * to the manual page
       */
      if ((c = fgetc (stream)) != '\012')
        if (!feof (stream))
          ungetc (c, stream);
      *buf++ = '\012';
      *buf   = '\0';
      return obp;
    }
    else if (c == '\012') { /* LF */
      *buf++ = '\012';
      *buf   = '\0';
      return obp;
    }
    /*
     * just another standard character
     */
    *buf++ = c;
  }
  /*
   * n-1 characters already transferred
   */
  *buf = '\0';

  return obp;
}

/*
 * A replacement strerror function that just returns the error code
 */

char * TOOLEXPORT
FP_strerror (int errcode)
{
  static char number[8];

  sprintf (number, "%03d", errcode);

  return number;
}

/*
 * tempnam is not ANSI, but tmpnam is. Ignore the prefix here.
 */

char * TOOLEXPORT
FP_tempnam (char *dir, char *pfx)
{
  return FP_strdup (tmpnam (NULL));
}
Revision:	1.1
Committed:	Mon Jun 11 19:48:57 2001 UTC (22 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Log Message:	* empty log message *
#	Content
1	/*
2	* fptools.c, some helper functions for getcgi.c and uu(en\|de)view
3	*
4	* Distributed by the GNU General Public License. Use and be happy.
5	* Read http://www.uni-frankfurt.de/~fp/Tools/Getcgi.html for more
6	* information. fp@informatik.uni-frankfurt.de
7	*/
8
9	#ifdef HAVE_CONFIG_H
10	#include "config.h"
11	#endif
12
13	#ifdef SYSTEM_WINDLL
14	#include <windows.h>
15	#endif
16	#ifdef SYSTEM_OS2
17	#include <os2.h>
18	#endif
19
20	/*
21	* This file provides replacements for some handy functions that aren't
22	* available on all systems, like most of the <string.h> functions. They
23	* should behave exactly as their counterparts. There are also extensions
24	* that aren't portable at all (like strirstr etc.).
25	* The proper behaviour in a configure script is as follows:
26	* AC_CHECK_FUNC(strrchr,AC_DEFINE(strrchr,FP_strrchr))
27	* This way, the (probably less efficient) replacements will only be used
28	* where it is not provided by the default libraries. Be aware that this
29	* does not work with replacements that just shadow wrong behaviour (like
30	* FP_free) or provide extended functionality (FP_gets).
31	* The above is not used in the uuenview/uudeview configuration script,
32	* since both only use the replacement functions in non-performance-cri-
33	* tical sections (except for FP_tempnam and FP_strerror, where some
34	* functionality of the original would be lost).
35	*/
36
37	#include <stdio.h>
38	#include <ctype.h>
39
40	#ifdef STDC_HEADERS
41	#include <stdlib.h>
42	#include <string.h>
43	#endif
44	#ifdef HAVE_MALLOC_H
45	#include <malloc.h>
46	#endif
47	#ifdef HAVE_UNISTD_H
48	#include <unistd.h>
49	#endif
50	#ifdef HAVE_MEMORY_H
51	#include <memory.h>
52	#endif
53
54	#include <fptools.h>
55
56	#if 0
57	#ifdef SYSTEM_WINDLL
58	BOOL _export WINAPI
59	DllEntryPoint (HINSTANCE hInstance, DWORD seginfo,
60	LPVOID lpCmdLine)
61	{
62	/* Don't do anything, so just return true */
63	return TRUE;
64	}
65	#endif
66	#endif
67
68	char * fptools_id = "$Id: fptools.c,v 1.4 1996/09/10 18:45:07 fp Exp $";
69
70	/*
71	* some versions of free can't handle a NULL pointer properly
72	* (ANSI says, free ignores a NULL pointer, but some machines
73	* prefer to SIGSEGV on it)
74	*/
75
76	void TOOLEXPORT
77	FP_free (void *ptr)
78	{
79	if (ptr) free (ptr);
80	}
81
82	/*
83	* This is non-standard, so I'm defining my own
84	*/
85
86	char * TOOLEXPORT
87	FP_strdup (char *string)
88	{
89	char *result;
90
91	if (string == NULL)
92	return NULL;
93
94	if ((result = (char *) malloc (strlen (string) + 1)) == NULL)
95	return NULL;
96
97	strcpy (result, string);
98	return result;
99	}
100
101	/*
102	* limited-length string copy. this function behaves differently from
103	* the original in that the dest string is always terminated with a
104	* NULL character.
105	*/
106
107	char * TOOLEXPORT
108	FP_strncpy (char dest, char src, int length)
109	{
110	char *odest=dest;
111	if (src == NULL \|\| dest == NULL \|\| length-- <= 0)
112	return dest;
113
114	while (length-- && *src)
115	dest++ = src++;
116
117	*dest++ = '\0';
118	return odest;
119	}
120
121	/*
122	* duplicate a memory area
123	*/
124
125	void * TOOLEXPORT
126	FP_memdup (void *ptr, int len)
127	{
128	void *result;
129
130	if (ptr == NULL)
131	return NULL;
132
133	if ((result = malloc (len)) == NULL)
134	return NULL;
135
136	memcpy (result, ptr, len);
137	return result;
138	}
139
140	/*
141	* case-insensitive compare
142	*/
143
144	int TOOLEXPORT
145	FP_stricmp (char str1, char str2)
146	{
147	if (str1==NULL \|\| str2==NULL)
148	return -1;
149
150	while (*str1) {
151	if (tolower(str1) != tolower(str2))
152	break;
153	str1++;
154	str2++;
155	}
156	return (tolower (str1) - tolower (str2));
157	}
158
159	int TOOLEXPORT
160	FP_strnicmp (char str1, char str2, int count)
161	{
162	if (str1==NULL \|\| str2==NULL)
163	return -1;
164
165	while (*str1 && count) {
166	if (tolower(str1) != tolower(str2))
167	break;
168	str1++;
169	str2++;
170	count--;
171	}
172	return count ? (tolower (str1) - tolower (str2)) : 0;
173	}
174
175	/*
176	* autoconf says this function might be a compatibility problem
177	*/
178
179	char * TOOLEXPORT
180	FP_strstr (char str1, char str2)
181	{
182	char ptr1, ptr2;
183
184	if (str1==NULL)
185	return NULL;
186	if (str2==NULL)
187	return str1;
188
189	while (*(ptr1=str1)) {
190	for (ptr2=str2;
191	ptr1 && ptr2 && ptr1==ptr2;
192	ptr1++, ptr2++)
193	/* empty loop */ ;
194
195	if (*ptr2 == '\0')
196	return str1;
197	str1++;
198	}
199	return NULL;
200	}
201
202	char * TOOLEXPORT
203	FP_strpbrk (char str, char accept)
204	{
205	char *ptr;
206
207	if (str == NULL)
208	return NULL;
209	if (accept == NULL \|\| *accept == '\0')
210	return str;
211
212	for (; *str; str++)
213	for (ptr=accept; *ptr; ptr++)
214	if (str == ptr)
215	return str;
216
217	return NULL;
218	}
219
220	/*
221	* autoconf also complains about this one
222	*/
223
224	char * TOOLEXPORT
225	FP_strtok (char str1, char str2)
226	{
227	static char *optr;
228	char *ptr;
229
230	if (str2 == NULL)
231	return NULL;
232
233	if (str1) {
234	optr = str1;
235	}
236	else {
237	if (*optr == '\0')
238	return NULL;
239	}
240
241	while (optr && strchr (str2, optr)) /* look for beginning of token */
242	optr++;
243
244	if (optr == '\0') / no token found */
245	return NULL;
246
247	ptr = optr;
248	while (optr && strchr (str2, optr) == NULL) /* look for end of token */
249	optr++;
250
251	if (*optr) {
252	*optr++ = '\0';
253	}
254	return ptr;
255	}
256
257	/*
258	* case insensitive strstr.
259	*/
260
261	char * TOOLEXPORT
262	FP_stristr (char str1, char str2)
263	{
264	char ptr1, ptr2;
265
266	if (str1==NULL)
267	return NULL;
268	if (str2==NULL)
269	return str1;
270
271	while (*(ptr1=str1)) {
272	for (ptr2=str2;
273	ptr1 && ptr2 && tolower(ptr1)==tolower(ptr2);
274	ptr1++, ptr2++)
275	/* empty loop */ ;
276
277	if (*ptr2 == '\0')
278	return str1;
279	str1++;
280	}
281	return NULL;
282	}
283
284	/*
285	* Nice fake of the real (non-standard) one
286	*/
287
288	char * TOOLEXPORT
289	FP_strrstr (char ptr, char str)
290	{
291	char found=NULL, new, *iter=ptr;
292
293	if (ptr==NULL \|\| str==NULL)
294	return NULL;
295
296	if (*str == '\0')
297	return ptr;
298
299	while ((new = FP_strstr (iter, str)) != NULL) {
300	found = new;
301	iter = new + 1;
302	}
303	return found;
304	}
305
306	char * TOOLEXPORT
307	FP_strirstr (char ptr, char str)
308	{
309	char found=NULL, iter=ptr, *new;
310
311	if (ptr==NULL \|\| str==NULL)
312	return NULL;
313	if (*str == '\0')
314	return ptr;
315
316	while ((new = FP_stristr (iter, str)) != NULL) {
317	found = new;
318	iter = new + 1;
319	}
320	return found;
321	}
322
323	/*
324	* convert whole string to case
325	*/
326
327	char * TOOLEXPORT
328	FP_stoupper (char *input)
329	{
330	char *iter = input;
331
332	if (input == NULL)
333	return NULL;
334
335	while (*iter) {
336	iter = toupper (iter);
337	iter++;
338	}
339	return input;
340	}
341
342	char * TOOLEXPORT
343	FP_stolower (char *input)
344	{
345	char *iter = input;
346
347	if (input == NULL)
348	return NULL;
349
350	while (*iter) {
351	iter = tolower (iter);
352	iter++;
353	}
354	return input;
355	}
356
357	/*
358	* string matching with wildcards
359	*/
360
361	int TOOLEXPORT
362	FP_strmatch (char string, char pattern)
363	{
364	char p1 = string, p2 = pattern;
365
366	if (pattern==NULL \|\| string==NULL)
367	return 0;
368
369	while (p1 && p2) {
370	if (*p2 == '?') {
371	p1++; p2++;
372	}
373	else if (p2 == '') {
374	if (*++p2 == '\0')
375	return 1;
376	while (p1 && p1 != *p2)
377	p1++;
378	}
379	else if (p1 == p2) {
380	p1++; p2++;
381	}
382	else
383	return 0;
384	}
385	if (p1 \|\| p2)
386	return 0;
387
388	return 1;
389	}
390
391	char * TOOLEXPORT
392	FP_strrchr (char *string, int tc)
393	{
394	char *ptr;
395
396	if (string == NULL)
397	return NULL;
398
399	ptr = string + strlen (string) - 1;
400
401	while (ptr != string && *ptr != tc)
402	ptr--;
403
404	if (*ptr == tc)
405	return ptr;
406
407	return NULL;
408	}
409
410	/*
411	* strip directory information from a filename. Works only on DOS and
412	* Unix systems so far ...
413	*/
414
415	char * TOOLEXPORT
416	FP_cutdir (char *filename)
417	{
418	char *ptr;
419
420	if (filename == NULL)
421	return NULL;
422
423	if ((ptr = FP_strrchr (filename, '/')) != NULL)
424	ptr++;
425	else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
426	ptr++;
427	else
428	ptr = filename;
429
430	return ptr;
431	}
432
433	/*
434	* My own fgets function. It handles all kinds of line terminators
435	* properly: LF (Unix), CRLF (DOS) and CR (Mac). In all cases, the
436	* terminator is replaced by a single LF
437	*/
438
439	char * TOOLEXPORT
440	FP_fgets (char buf, int n, FILE stream)
441	{
442	char *obp = buf;
443	int c;
444
445	if (feof (stream))
446	return NULL;
447
448	while (--n) {
449	if ((c = fgetc (stream)) == EOF) {
450	if (ferror (stream))
451	return NULL;
452	else {
453	if (obp == buf)
454	return NULL;
455	*buf = '\0';
456	return obp;
457	}
458	}
459	if (c == '\015') { /* CR */
460	/*
461	* Peek next character. If it's no LF, push it back.
462	* ungetc(EOF, stream) is handled correctly according
463	* to the manual page
464	*/
465	if ((c = fgetc (stream)) != '\012')
466	if (!feof (stream))
467	ungetc (c, stream);
468	*buf++ = '\012';
469	*buf = '\0';
470	return obp;
471	}
472	else if (c == '\012') { /* LF */
473	*buf++ = '\012';
474	*buf = '\0';
475	return obp;
476	}
477	/*
478	* just another standard character
479	*/
480	*buf++ = c;
481	}
482	/*
483	* n-1 characters already transferred
484	*/
485	*buf = '\0';
486
487	return obp;
488	}
489
490	/*
491	* A replacement strerror function that just returns the error code
492	*/
493
494	char * TOOLEXPORT
495	FP_strerror (int errcode)
496	{
497	static char number[8];
498
499	sprintf (number, "%03d", errcode);
500
501	return number;
502	}
503
504	/*
505	* tempnam is not ANSI, but tmpnam is. Ignore the prefix here.
506	*/
507
508	char * TOOLEXPORT
509	FP_tempnam (char dir, char pfx)
510	{
511	return FP_strdup (tmpnam (NULL));
512	}