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

/*
 * 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 */
ecb_hot 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;
}

Revision:	1.19
Committed:	Sat Sep 24 06:02:04 2022 UTC (20 months, 1 week ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.18:	+0 -2 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	/*
68	* some versions of free can't handle a NULL pointer properly
69	* (ANSI says, free ignores a NULL pointer, but some machines
70	* prefer to SIGSEGV on it)
71	*/
72
73	void TOOLEXPORT
74	FP_free (void *ptr)
75	{
76	if (ptr) free (ptr);
77	}
78
79	/*
80	* This is non-standard, so I'm defining my own
81	*/
82
83	char * TOOLEXPORT
84	FP_strdup (char *string)
85	{
86	char *result;
87
88	if (string == NULL)
89	return NULL;
90
91	if ((result = (char *) malloc (strlen (string) + 1)) == NULL)
92	return NULL;
93
94	strcpy (result, string);
95	return result;
96	}
97
98	/*
99	* limited-length string copy. this function behaves differently from
100	* the original in that the dest string is always terminated with a
101	* NULL character.
102	*/
103
104	char * TOOLEXPORT
105	FP_strncpy (char dest, char src, int length)
106	{
107	char *odest=dest;
108	if (src == NULL \|\| dest == NULL \|\| length-- <= 0)
109	return dest;
110
111	while (length-- && *src)
112	dest++ = src++;
113
114	*dest++ = '\0';
115	return odest;
116	}
117
118	/*
119	* duplicate a memory area
120	*/
121
122	void * TOOLEXPORT
123	FP_memdup (const void *ptr, int len)
124	{
125	void *result;
126
127	if (ptr == NULL)
128	return NULL;
129
130	if ((result = malloc (len)) == NULL)
131	return NULL;
132
133	memcpy (result, ptr, len);
134	return result;
135	}
136
137	/*
138	* case-insensitive compare
139	*/
140
141	#ifndef FP_stricmp
142	int TOOLEXPORT
143	FP_stricmp (const char str1, const char str2)
144	{
145	if (str1==NULL \|\| str2==NULL)
146	return -1;
147
148	while (*str1) {
149	if (tolower(str1) != tolower(str2))
150	break;
151	str1++;
152	str2++;
153	}
154	return (tolower (str1) - tolower (str2));
155	}
156	#endif
157
158	#ifndef FP_strnicmp
159	int TOOLEXPORT
160	FP_strnicmp (const char str1, const char str2, int count)
161	{
162	int d;
163
164	if (!str1 \|\| !str2)
165	return -1;
166
167	while (count--) {
168	if (!*str1)
169	return -1;
170
171	d = tolower (str1) - tolower (str2);
172	if (d)
173	return d;
174
175	str1++;
176	str2++;
177	}
178
179	return 0;
180	}
181	#endif
182
183	int TOOLEXPORT
184	FP_strnicmp_fast (const char str1, const char str2, int count)
185	{
186	if (!str1 \|\| !str2)
187	return -1;
188
189	while (count--) {
190	if (!*str1)
191	return -1;
192
193	if ((str1 ^ str2) & 0xdf)
194	return (str1 & 0xdf) - (str2 & 0xdf);
195
196	str1++;
197	str2++;
198	}
199
200	return 0;
201	}
202
203	char * TOOLEXPORT
204	FP_strpbrk (char str, char accept)
205	{
206	char *ptr;
207
208	if (str == NULL)
209	return NULL;
210	if (accept == NULL \|\| *accept == '\0')
211	return str;
212
213	for (; *str; str++)
214	for (ptr=accept; *ptr; ptr++)
215	if (str == ptr)
216	return str;
217
218	return NULL;
219	}
220
221	/*
222	* autoconf also complains about this one
223	*/
224
225	char * TOOLEXPORT
226	FP_strtok (char str1, char str2)
227	{
228	static char *optr;
229	char *ptr;
230
231	if (str2 == NULL)
232	return NULL;
233
234	if (str1) {
235	optr = str1;
236	}
237	else {
238	if (*optr == '\0')
239	return NULL;
240	}
241
242	while (optr && strchr (str2, optr)) /* look for beginning of token */
243	optr++;
244
245	if (optr == '\0') / no token found */
246	return NULL;
247
248	ptr = optr;
249	while (optr && strchr (str2, optr) == NULL) /* look for end of token */
250	optr++;
251
252	if (*optr) {
253	*optr++ = '\0';
254	}
255	return ptr;
256	}
257
258	/*
259	* case insensitive strstr.
260	*/
261
262	#ifndef FP_stristr
263	char * TOOLEXPORT
264	FP_stristr (char str1, char str2)
265	{
266	char ptr1, ptr2;
267
268	if (str1==NULL)
269	return NULL;
270	if (str2==NULL)
271	return str1;
272
273	while (*(ptr1=str1)) {
274	for (ptr2=str2;
275	ptr1 && ptr2 && tolower(ptr1)==tolower(ptr2);
276	ptr1++, ptr2++)
277	/* empty loop */ ;
278
279	if (*ptr2 == '\0')
280	return str1;
281	str1++;
282	}
283	return NULL;
284	}
285	#endif
286
287	/*
288	* Nice fake of the real (non-standard) one
289	*/
290
291	char * TOOLEXPORT
292	FP_strrstr (const char ptr, const char str)
293	{
294	const char found=NULL, new, *iter=ptr;
295
296	if (ptr==NULL \|\| str==NULL)
297	return NULL;
298
299	if (*str == '\0')
300	return (char *)ptr;
301
302	while ((new = FP_strstr (iter, str)) != NULL) {
303	found = new;
304	iter = new + 1;
305	}
306
307	return (char *)found;
308	}
309
310	char * TOOLEXPORT
311	FP_strirstr (char ptr, char str)
312	{
313	char found=NULL, iter=ptr, *new;
314
315	if (ptr==NULL \|\| str==NULL)
316	return NULL;
317	if (*str == '\0')
318	return ptr;
319
320	while ((new = FP_stristr (iter, str)) != NULL) {
321	found = new;
322	iter = new + 1;
323	}
324	return found;
325	}
326
327	/*
328	* convert whole string to case
329	*/
330
331	char * TOOLEXPORT
332	FP_stoupper (char *input)
333	{
334	char *iter = input;
335
336	if (input == NULL)
337	return NULL;
338
339	while (*iter) {
340	iter = toupper (iter);
341	iter++;
342	}
343	return input;
344	}
345
346	char * TOOLEXPORT
347	FP_stolower (char *input)
348	{
349	char *iter = input;
350
351	if (input == NULL)
352	return NULL;
353
354	while (*iter) {
355	iter = tolower (iter);
356	iter++;
357	}
358	return input;
359	}
360
361	/*
362	* string matching with wildcards
363	*/
364
365	int TOOLEXPORT
366	FP_strmatch (char string, char pattern)
367	{
368	char p1 = string, p2 = pattern;
369
370	if (pattern==NULL \|\| string==NULL)
371	return 0;
372
373	while (p1 && p2) {
374	if (*p2 == '?') {
375	p1++; p2++;
376	}
377	else if (p2 == '') {
378	if (*++p2 == '\0')
379	return 1;
380	while (p1 && p1 != *p2)
381	p1++;
382	}
383	else if (p1 == p2) {
384	p1++; p2++;
385	}
386	else
387	return 0;
388	}
389	if (p1 \|\| p2)
390	return 0;
391
392	return 1;
393	}
394
395	char * TOOLEXPORT
396	FP_strrchr (const char *string, int tc)
397	{
398	const char *ptr;
399
400	if (string == NULL \|\| !*string)
401	return NULL;
402
403	ptr = string + strlen (string) - 1;
404
405	while (ptr != string && *ptr != tc)
406	ptr--;
407
408	if (*ptr == tc)
409	return (char *)ptr;
410
411	return NULL;
412	}
413
414	/*
415	* strip directory information from a filename. Works only on DOS and
416	* Unix systems so far ...
417	*/
418
419	char * TOOLEXPORT
420	FP_cutdir (char *filename)
421	{
422	char *ptr;
423
424	if (filename == NULL)
425	return NULL;
426
427	if ((ptr = FP_strrchr (filename, '/')) != NULL)
428	ptr++;
429	else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
430	ptr++;
431	else
432	ptr = filename;
433
434	return ptr;
435	}
436
437	/*
438	* My own fgets function. It handles all kinds of line terminators
439	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
440	*/
441	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
442	/* also, if the buffer is too short, the remaining line is skipped */
443	ecb_hot char * TOOLEXPORT
444	FP_fgets (char buf, int n, FILE stream)
445	{
446	char *ptr = buf;
447	char *end = buf + n - 1;
448
449	/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
450	if (n <= 0)
451	return 0;
452
453	for (;;)
454	{
455	int c = FP_getc (stream);
456
457	if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
458	{
459	/* ctlchar */
460
461	if (c == '\012')
462	/* LF, nothing following */
463	break;
464	else if (c == '\015')
465	{
466	/* CR, possibly CRLF, skip following LF */
467	c = FP_getc (stream);
468
469	if (c != '\012') /* CR LF? */
470	ungetc (c, stream);
471
472	break;
473	}
474	else if (c == EOF)
475	{
476	*ptr = 0;
477	return 0;
478	}
479	}
480
481	*ptr = c;
482	ptr += ptr < end; /* this is hopefully branch-free, and fast */
483	}
484
485	*ptr = 0;
486	return buf;
487	}
488