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 (const 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)
{
  int d;

  if (!str1 || !str2)
    return -1;

  while (count--) {
    if (!*str1)
      return -1;

    d = tolower (*str1) - tolower (*str2);
    if (d)
      return d;

    str1++;
    str2++;
  }

  return 0;
}
#endif

int TOOLEXPORT
FP_strnicmp_fast (const char *str1, const char *str2, int count)
{
  if (!str1 || !str2)
    return -1;

  while (count--) {
    if (!*str1)
      return -1;

    if ((*str1 ^ *str2) & 0xdf)
      return (*str1 & 0xdf) - (*str2 & 0xdf);

    str1++;
    str2++;
  }

  return 0;
}

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

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

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

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

  return (char *)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 (const char *string, int tc)
{
  const char *ptr;

  if (string == NULL || !*string)
    return NULL;

  ptr = string + strlen (string) - 1;

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

  if (*ptr == tc)
    return (char *)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_getc (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_getc (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:	1.16
Committed:	Sat Dec 12 00:44:18 2020 UTC (3 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.15:	+19 -10 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 (const 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	int d;
165
166	if (!str1 \|\| !str2)
167	return -1;
168
169	while (count--) {
170	if (!*str1)
171	return -1;
172
173	d = tolower (str1) - tolower (str2);
174	if (d)
175	return d;
176
177	str1++;
178	str2++;
179	}
180
181	return 0;
182	}
183	#endif
184
185	int TOOLEXPORT
186	FP_strnicmp_fast (const char str1, const char str2, int count)
187	{
188	if (!str1 \|\| !str2)
189	return -1;
190
191	while (count--) {
192	if (!*str1)
193	return -1;
194
195	if ((str1 ^ str2) & 0xdf)
196	return (str1 & 0xdf) - (str2 & 0xdf);
197
198	str1++;
199	str2++;
200	}
201
202	return 0;
203	}
204
205	char * TOOLEXPORT
206	FP_strpbrk (char str, char accept)
207	{
208	char *ptr;
209
210	if (str == NULL)
211	return NULL;
212	if (accept == NULL \|\| *accept == '\0')
213	return str;
214
215	for (; *str; str++)
216	for (ptr=accept; *ptr; ptr++)
217	if (str == ptr)
218	return str;
219
220	return NULL;
221	}
222
223	/*
224	* autoconf also complains about this one
225	*/
226
227	char * TOOLEXPORT
228	FP_strtok (char str1, char str2)
229	{
230	static char *optr;
231	char *ptr;
232
233	if (str2 == NULL)
234	return NULL;
235
236	if (str1) {
237	optr = str1;
238	}
239	else {
240	if (*optr == '\0')
241	return NULL;
242	}
243
244	while (optr && strchr (str2, optr)) /* look for beginning of token */
245	optr++;
246
247	if (optr == '\0') / no token found */
248	return NULL;
249
250	ptr = optr;
251	while (optr && strchr (str2, optr) == NULL) /* look for end of token */
252	optr++;
253
254	if (*optr) {
255	*optr++ = '\0';
256	}
257	return ptr;
258	}
259
260	/*
261	* case insensitive strstr.
262	*/
263
264	#ifndef FP_stristr
265	char * TOOLEXPORT
266	FP_stristr (char str1, char str2)
267	{
268	char ptr1, ptr2;
269
270	if (str1==NULL)
271	return NULL;
272	if (str2==NULL)
273	return str1;
274
275	while (*(ptr1=str1)) {
276	for (ptr2=str2;
277	ptr1 && ptr2 && tolower(ptr1)==tolower(ptr2);
278	ptr1++, ptr2++)
279	/* empty loop */ ;
280
281	if (*ptr2 == '\0')
282	return str1;
283	str1++;
284	}
285	return NULL;
286	}
287	#endif
288
289	/*
290	* Nice fake of the real (non-standard) one
291	*/
292
293	char * TOOLEXPORT
294	FP_strrstr (const char ptr, const char str)
295	{
296	const char found=NULL, new, *iter=ptr;
297
298	if (ptr==NULL \|\| str==NULL)
299	return NULL;
300
301	if (*str == '\0')
302	return (char *)ptr;
303
304	while ((new = FP_strstr (iter, str)) != NULL) {
305	found = new;
306	iter = new + 1;
307	}
308
309	return (char *)found;
310	}
311
312	char * TOOLEXPORT
313	FP_strirstr (char ptr, char str)
314	{
315	char found=NULL, iter=ptr, *new;
316
317	if (ptr==NULL \|\| str==NULL)
318	return NULL;
319	if (*str == '\0')
320	return ptr;
321
322	while ((new = FP_stristr (iter, str)) != NULL) {
323	found = new;
324	iter = new + 1;
325	}
326	return found;
327	}
328
329	/*
330	* convert whole string to case
331	*/
332
333	char * TOOLEXPORT
334	FP_stoupper (char *input)
335	{
336	char *iter = input;
337
338	if (input == NULL)
339	return NULL;
340
341	while (*iter) {
342	iter = toupper (iter);
343	iter++;
344	}
345	return input;
346	}
347
348	char * TOOLEXPORT
349	FP_stolower (char *input)
350	{
351	char *iter = input;
352
353	if (input == NULL)
354	return NULL;
355
356	while (*iter) {
357	iter = tolower (iter);
358	iter++;
359	}
360	return input;
361	}
362
363	/*
364	* string matching with wildcards
365	*/
366
367	int TOOLEXPORT
368	FP_strmatch (char string, char pattern)
369	{
370	char p1 = string, p2 = pattern;
371
372	if (pattern==NULL \|\| string==NULL)
373	return 0;
374
375	while (p1 && p2) {
376	if (*p2 == '?') {
377	p1++; p2++;
378	}
379	else if (p2 == '') {
380	if (*++p2 == '\0')
381	return 1;
382	while (p1 && p1 != *p2)
383	p1++;
384	}
385	else if (p1 == p2) {
386	p1++; p2++;
387	}
388	else
389	return 0;
390	}
391	if (p1 \|\| p2)
392	return 0;
393
394	return 1;
395	}
396
397	char * TOOLEXPORT
398	FP_strrchr (const char *string, int tc)
399	{
400	const char *ptr;
401
402	if (string == NULL \|\| !*string)
403	return NULL;
404
405	ptr = string + strlen (string) - 1;
406
407	while (ptr != string && *ptr != tc)
408	ptr--;
409
410	if (*ptr == tc)
411	return (char *)ptr;
412
413	return NULL;
414	}
415
416	/*
417	* strip directory information from a filename. Works only on DOS and
418	* Unix systems so far ...
419	*/
420
421	char * TOOLEXPORT
422	FP_cutdir (char *filename)
423	{
424	char *ptr;
425
426	if (filename == NULL)
427	return NULL;
428
429	if ((ptr = FP_strrchr (filename, '/')) != NULL)
430	ptr++;
431	else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
432	ptr++;
433	else
434	ptr = filename;
435
436	return ptr;
437	}
438
439	/*
440	* My own fgets function. It handles all kinds of line terminators
441	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
442	*/
443	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
444	/* also, if the buffer is too short, the remaining line is skipped */
445	char * TOOLEXPORT
446	FP_fgets (char buf, int n, FILE stream)
447	{
448	char *ptr = buf;
449	char *end = buf + n - 1;
450
451	/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
452	if (n <= 0)
453	return 0;
454
455	for (;;)
456	{
457	int c = FP_getc (stream);
458
459	if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
460	{
461	/* ctlchar */
462
463	if (c == '\012')
464	/* LF, nothing following */
465	break;
466	else if (c == '\015')
467	{
468	/* CR, possibly CRLF, skip following LF */
469	c = FP_getc (stream);
470
471	if (c != '\012') /* CR LF? */
472	ungetc (c, stream);
473
474	break;
475	}
476	else if (c == EOF)
477	{
478	*ptr = 0;
479	return 0;
480	}
481	}
482
483	*ptr = c;
484	ptr += ptr < end; /* this is hopefully branch-free, and fast */
485	}
486
487	*ptr = 0;
488	return buf;
489	}
490
491	/*
492	* A replacement strerror function that just returns the error code
493	*/
494
495	char * TOOLEXPORT
496	FP_strerror (int errcode)
497	{
498	static char number[8];
499
500	sprintf (number, "%03d", errcode);
501
502	return number;
503	}
504	#ifndef HAVE_MKSTEMP
505	/*
506	* tempnam is not ANSI, but tmpnam is. Ignore the prefix here.
507	*/
508
509	char * TOOLEXPORT
510	FP_tempnam (char dir, char pfx)
511	{
512	return FP_strdup (tmpnam (NULL));
513	}
514	#endif /* HAVE_MKSTEMP */