Convert-UUlib/uulib/fptools.c

/*
 * fptools.c, some helper functions for getcgi.c and uu(en|de)view
 *
 * Distributed under the terms of the GNU General Public License.
 * Use and be happy.
 */

#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 = "$Id$";

/*
 * 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
 */

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

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

#ifndef FP_strnicmp
int TOOLEXPORT
_FP_strnicmp (const char *str1, const 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;
}
#endif

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.
 */

#ifndef FP_stristr
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;
}
#endif

/*
 * 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 || !*string)
    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).
 */
/* (schmorp) the buffer is always written to, and no LF is stored at the end */
/* also, if the buffer is too short, the remaining line is skipped */
char * TOOLEXPORT
_FP_fgets (char *buf, int n, FILE *stream)
{
  char *ptr = buf;
  char *end = buf + n - 1;

  /* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
  if (n <= 0)
    return 0;

  for (;;)
    {
      int c = FP_fgetc (stream);

      if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
        {
          /* ctlchar */

          if (c == '\012')
            /* LF, nothing following */
            break;
          else if (c == '\015')
            {
              /* CR, possibly CRLF, skip following LF */
              c = FP_fgetc (stream);

              if (c != '\012') /* CR LF? */
                ungetc (c, stream);

              break;
            }
          else if (c == EOF)
            {
              *ptr = 0;
              return 0;
            }
        }

      *ptr = c;
      ptr += ptr < end; /* this is hopefully branch-free, and fast */
    }

  *ptr = 0;
  return buf;
}

/*
 * 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;
}
#ifndef HAVE_MKSTEMP
/*
 * tempnam is not ANSI, but tmpnam is. Ignore the prefix here.
 */

char * TOOLEXPORT
_FP_tempnam (char *dir, char *pfx)
{
  return _FP_strdup (tmpnam (NULL));
}
#endif /* HAVE_MKSTEMP */
Revision:	1.12
Committed:	Fri Feb 14 08:02:26 2020 UTC (4 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-1_71, rel-1_7, rel-1_62
Changes since 1.11:	+30 -29 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* fptools.c, some helper functions for getcgi.c and uu(en\|de)view
3	*
4	* Distributed under the terms of the GNU General Public License.
5	* Use and be happy.
6	*/
7
8	#ifdef HAVE_CONFIG_H
9	#include "config.h"
10	#endif
11
12	#ifdef SYSTEM_WINDLL
13	#include <windows.h>
14	#endif
15	#ifdef SYSTEM_OS2
16	#include <os2.h>
17	#endif
18
19	/*
20	* This file provides replacements for some handy functions that aren't
21	* available on all systems, like most of the <string.h> functions. They
22	* should behave exactly as their counterparts. There are also extensions
23	* that aren't portable at all (like strirstr etc.).
24	* The proper behaviour in a configure script is as follows:
25	* AC_CHECK_FUNC(strrchr,AC_DEFINE(strrchr,_FP_strrchr))
26	* This way, the (probably less efficient) replacements will only be used
27	* where it is not provided by the default libraries. Be aware that this
28	* does not work with replacements that just shadow wrong behaviour (like
29	* _FP_free) or provide extended functionality (FP_gets).
30	* The above is not used in the uuenview/uudeview configuration script,
31	* since both only use the replacement functions in non-performance-cri-
32	* tical sections (except for _FP_tempnam and FP_strerror, where some
33	* functionality of the original would be lost).
34	*/
35
36	#include <stdio.h>
37	#include <ctype.h>
38
39	#ifdef STDC_HEADERS
40	#include <stdlib.h>
41	#include <string.h>
42	#endif
43	#ifdef HAVE_MALLOC_H
44	#include <malloc.h>
45	#endif
46	#ifdef HAVE_UNISTD_H
47	#include <unistd.h>
48	#endif
49	#ifdef HAVE_MEMORY_H
50	#include <memory.h>
51	#endif
52
53	#include <fptools.h>
54
55	#if 0
56	#ifdef SYSTEM_WINDLL
57	BOOL _export WINAPI
58	DllEntryPoint (HINSTANCE hInstance, DWORD seginfo,
59	LPVOID lpCmdLine)
60	{
61	/* Don't do anything, so just return true */
62	return TRUE;
63	}
64	#endif
65	#endif
66
67	char * fptools_id = "$Id$";
68
69	/*
70	* some versions of free can't handle a NULL pointer properly
71	* (ANSI says, free ignores a NULL pointer, but some machines
72	* prefer to SIGSEGV on it)
73	*/
74
75	void TOOLEXPORT
76	_FP_free (void *ptr)
77	{
78	if (ptr) free (ptr);
79	}
80
81	/*
82	* This is non-standard, so I'm defining my own
83	*/
84
85	char * TOOLEXPORT
86	_FP_strdup (char *string)
87	{
88	char *result;
89
90	if (string == NULL)
91	return NULL;
92
93	if ((result = (char *) malloc (strlen (string) + 1)) == NULL)
94	return NULL;
95
96	strcpy (result, string);
97	return result;
98	}
99
100	/*
101	* limited-length string copy. this function behaves differently from
102	* the original in that the dest string is always terminated with a
103	* NULL character.
104	*/
105
106	char * TOOLEXPORT
107	_FP_strncpy (char dest, char src, int length)
108	{
109	char *odest=dest;
110	if (src == NULL \|\| dest == NULL \|\| length-- <= 0)
111	return dest;
112
113	while (length-- && *src)
114	dest++ = src++;
115
116	*dest++ = '\0';
117	return odest;
118	}
119
120	/*
121	* duplicate a memory area
122	*/
123
124	void * TOOLEXPORT
125	_FP_memdup (void *ptr, int len)
126	{
127	void *result;
128
129	if (ptr == NULL)
130	return NULL;
131
132	if ((result = malloc (len)) == NULL)
133	return NULL;
134
135	memcpy (result, ptr, len);
136	return result;
137	}
138
139	/*
140	* case-insensitive compare
141	*/
142
143	#ifndef FP_stricmp
144	int TOOLEXPORT
145	_FP_stricmp (const char str1, const 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	#endif
159
160	#ifndef FP_strnicmp
161	int TOOLEXPORT
162	_FP_strnicmp (const char str1, const char str2, int count)
163	{
164	if (str1==NULL \|\| str2==NULL)
165	return -1;
166
167	while (*str1 && count) {
168	if (tolower(str1) != tolower(str2))
169	break;
170	str1++;
171	str2++;
172	count--;
173	}
174	return count ? (tolower (str1) - tolower (str2)) : 0;
175	}
176	#endif
177
178	char * TOOLEXPORT
179	_FP_strpbrk (char str, char accept)
180	{
181	char *ptr;
182
183	if (str == NULL)
184	return NULL;
185	if (accept == NULL \|\| *accept == '\0')
186	return str;
187
188	for (; *str; str++)
189	for (ptr=accept; *ptr; ptr++)
190	if (str == ptr)
191	return str;
192
193	return NULL;
194	}
195
196	/*
197	* autoconf also complains about this one
198	*/
199
200	char * TOOLEXPORT
201	_FP_strtok (char str1, char str2)
202	{
203	static char *optr;
204	char *ptr;
205
206	if (str2 == NULL)
207	return NULL;
208
209	if (str1) {
210	optr = str1;
211	}
212	else {
213	if (*optr == '\0')
214	return NULL;
215	}
216
217	while (optr && strchr (str2, optr)) /* look for beginning of token */
218	optr++;
219
220	if (optr == '\0') / no token found */
221	return NULL;
222
223	ptr = optr;
224	while (optr && strchr (str2, optr) == NULL) /* look for end of token */
225	optr++;
226
227	if (*optr) {
228	*optr++ = '\0';
229	}
230	return ptr;
231	}
232
233	/*
234	* case insensitive strstr.
235	*/
236
237	#ifndef FP_stristr
238	char * TOOLEXPORT
239	_FP_stristr (char str1, char str2)
240	{
241	char ptr1, ptr2;
242
243	if (str1==NULL)
244	return NULL;
245	if (str2==NULL)
246	return str1;
247
248	while (*(ptr1=str1)) {
249	for (ptr2=str2;
250	ptr1 && ptr2 && tolower(ptr1)==tolower(ptr2);
251	ptr1++, ptr2++)
252	/* empty loop */ ;
253
254	if (*ptr2 == '\0')
255	return str1;
256	str1++;
257	}
258	return NULL;
259	}
260	#endif
261
262	/*
263	* Nice fake of the real (non-standard) one
264	*/
265
266	char * TOOLEXPORT
267	_FP_strrstr (char ptr, char str)
268	{
269	char found=NULL, new, *iter=ptr;
270
271	if (ptr==NULL \|\| str==NULL)
272	return NULL;
273
274	if (*str == '\0')
275	return ptr;
276
277	while ((new = _FP_strstr (iter, str)) != NULL) {
278	found = new;
279	iter = new + 1;
280	}
281	return found;
282	}
283
284	char * TOOLEXPORT
285	_FP_strirstr (char ptr, char str)
286	{
287	char found=NULL, iter=ptr, *new;
288
289	if (ptr==NULL \|\| str==NULL)
290	return NULL;
291	if (*str == '\0')
292	return ptr;
293
294	while ((new = _FP_stristr (iter, str)) != NULL) {
295	found = new;
296	iter = new + 1;
297	}
298	return found;
299	}
300
301	/*
302	* convert whole string to case
303	*/
304
305	char * TOOLEXPORT
306	_FP_stoupper (char *input)
307	{
308	char *iter = input;
309
310	if (input == NULL)
311	return NULL;
312
313	while (*iter) {
314	iter = toupper (iter);
315	iter++;
316	}
317	return input;
318	}
319
320	char * TOOLEXPORT
321	_FP_stolower (char *input)
322	{
323	char *iter = input;
324
325	if (input == NULL)
326	return NULL;
327
328	while (*iter) {
329	iter = tolower (iter);
330	iter++;
331	}
332	return input;
333	}
334
335	/*
336	* string matching with wildcards
337	*/
338
339	int TOOLEXPORT
340	_FP_strmatch (char string, char pattern)
341	{
342	char p1 = string, p2 = pattern;
343
344	if (pattern==NULL \|\| string==NULL)
345	return 0;
346
347	while (p1 && p2) {
348	if (*p2 == '?') {
349	p1++; p2++;
350	}
351	else if (p2 == '') {
352	if (*++p2 == '\0')
353	return 1;
354	while (p1 && p1 != *p2)
355	p1++;
356	}
357	else if (p1 == p2) {
358	p1++; p2++;
359	}
360	else
361	return 0;
362	}
363	if (p1 \|\| p2)
364	return 0;
365
366	return 1;
367	}
368
369	char * TOOLEXPORT
370	_FP_strrchr (char *string, int tc)
371	{
372	char *ptr;
373
374	if (string == NULL \|\| !*string)
375	return NULL;
376
377	ptr = string + strlen (string) - 1;
378
379	while (ptr != string && *ptr != tc)
380	ptr--;
381
382	if (*ptr == tc)
383	return ptr;
384
385	return NULL;
386	}
387
388	/*
389	* strip directory information from a filename. Works only on DOS and
390	* Unix systems so far ...
391	*/
392
393	char * TOOLEXPORT
394	_FP_cutdir (char *filename)
395	{
396	char *ptr;
397
398	if (filename == NULL)
399	return NULL;
400
401	if ((ptr = _FP_strrchr (filename, '/')) != NULL)
402	ptr++;
403	else if ((ptr = _FP_strrchr (filename, '\\')) != NULL)
404	ptr++;
405	else
406	ptr = filename;
407
408	return ptr;
409	}
410
411	/*
412	* My own fgets function. It handles all kinds of line terminators
413	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
414	*/
415	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
416	/* also, if the buffer is too short, the remaining line is skipped */
417	char * TOOLEXPORT
418	_FP_fgets (char buf, int n, FILE stream)
419	{
420	char *ptr = buf;
421	char *end = buf + n - 1;
422
423	/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
424	if (n <= 0)
425	return 0;
426
427	for (;;)
428	{
429	int c = FP_fgetc (stream);
430
431	if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
432	{
433	/* ctlchar */
434
435	if (c == '\012')
436	/* LF, nothing following */
437	break;
438	else if (c == '\015')
439	{
440	/* CR, possibly CRLF, skip following LF */
441	c = FP_fgetc (stream);
442
443	if (c != '\012') /* CR LF? */
444	ungetc (c, stream);
445
446	break;
447	}
448	else if (c == EOF)
449	{
450	*ptr = 0;
451	return 0;
452	}
453	}
454
455	*ptr = c;
456	ptr += ptr < end; /* this is hopefully branch-free, and fast */
457	}
458
459	*ptr = 0;
460	return buf;
461	}
462
463	/*
464	* A replacement strerror function that just returns the error code
465	*/
466
467	char * TOOLEXPORT
468	_FP_strerror (int errcode)
469	{
470	static char number[8];
471
472	sprintf (number, "%03d", errcode);
473
474	return number;
475	}
476	#ifndef HAVE_MKSTEMP
477	/*
478	* tempnam is not ANSI, but tmpnam is. Ignore the prefix here.
479	*/
480
481	char * TOOLEXPORT
482	_FP_tempnam (char dir, char pfx)
483	{
484	return _FP_strdup (tmpnam (NULL));
485	}
486	#endif /* HAVE_MKSTEMP */