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>
#include <stdlib.h>
#include <string.h>

#ifdef HAVE_UNISTD_H
#include <unistd.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:	1.21
Committed:	Sat Sep 24 06:22:47 2022 UTC (4 years ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.20:	+0 -6 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	#include <stdlib.h>
39	#include <string.h>
40
41	#ifdef HAVE_UNISTD_H
42	#include <unistd.h>
43	#endif
44
45	#include <fptools.h>
46
47	#if 0
48	#ifdef SYSTEM_WINDLL
49	BOOL _export WINAPI
50	DllEntryPoint (HINSTANCE hInstance, DWORD seginfo,
51	LPVOID lpCmdLine)
52	{
53	/* Don't do anything, so just return true */
54	return TRUE;
55	}
56	#endif
57	#endif
58
59	/*
60	* some versions of free can't handle a NULL pointer properly
61	* (ANSI says, free ignores a NULL pointer, but some machines
62	* prefer to SIGSEGV on it)
63	*/
64
65	void TOOLEXPORT
66	FP_free (void *ptr)
67	{
68	if (ptr) free (ptr);
69	}
70
71	/*
72	* This is non-standard, so I'm defining my own
73	*/
74
75	char * TOOLEXPORT
76	FP_strdup (char *string)
77	{
78	char *result;
79
80	if (string == NULL)
81	return NULL;
82
83	if ((result = (char *) malloc (strlen (string) + 1)) == NULL)
84	return NULL;
85
86	strcpy (result, string);
87	return result;
88	}
89
90	/*
91	* limited-length string copy. this function behaves differently from
92	* the original in that the dest string is always terminated with a
93	* NULL character.
94	*/
95
96	char * TOOLEXPORT
97	FP_strncpy (char dest, char src, int length)
98	{
99	char *odest=dest;
100	if (src == NULL \|\| dest == NULL \|\| length-- <= 0)
101	return dest;
102
103	while (length-- && *src)
104	dest++ = src++;
105
106	*dest++ = '\0';
107	return odest;
108	}
109
110	/*
111	* duplicate a memory area
112	*/
113
114	void * TOOLEXPORT
115	FP_memdup (const void *ptr, int len)
116	{
117	void *result;
118
119	if (ptr == NULL)
120	return NULL;
121
122	if ((result = malloc (len)) == NULL)
123	return NULL;
124
125	memcpy (result, ptr, len);
126	return result;
127	}
128
129	/*
130	* case-insensitive compare
131	*/
132
133	#ifndef FP_stricmp
134	int TOOLEXPORT
135	FP_stricmp (const char str1, const char str2)
136	{
137	if (str1==NULL \|\| str2==NULL)
138	return -1;
139
140	while (*str1) {
141	if (tolower(str1) != tolower(str2))
142	break;
143	str1++;
144	str2++;
145	}
146	return (tolower (str1) - tolower (str2));
147	}
148	#endif
149
150	#ifndef FP_strnicmp
151	int TOOLEXPORT
152	FP_strnicmp (const char str1, const char str2, int count)
153	{
154	int d;
155
156	if (!str1 \|\| !str2)
157	return -1;
158
159	while (count--) {
160	if (!*str1)
161	return -1;
162
163	d = tolower (str1) - tolower (str2);
164	if (d)
165	return d;
166
167	str1++;
168	str2++;
169	}
170
171	return 0;
172	}
173	#endif
174
175	int TOOLEXPORT
176	FP_strnicmp_fast (const char str1, const char str2, int count)
177	{
178	if (!str1 \|\| !str2)
179	return -1;
180
181	while (count--) {
182	if (!*str1)
183	return -1;
184
185	if ((str1 ^ str2) & 0xdf)
186	return (str1 & 0xdf) - (str2 & 0xdf);
187
188	str1++;
189	str2++;
190	}
191
192	return 0;
193	}
194
195	char * TOOLEXPORT
196	FP_strpbrk (char str, char accept)
197	{
198	char *ptr;
199
200	if (str == NULL)
201	return NULL;
202	if (accept == NULL \|\| *accept == '\0')
203	return str;
204
205	for (; *str; str++)
206	for (ptr=accept; *ptr; ptr++)
207	if (str == ptr)
208	return str;
209
210	return NULL;
211	}
212
213	/*
214	* autoconf also complains about this one
215	*/
216
217	char * TOOLEXPORT
218	FP_strtok (char str1, char str2)
219	{
220	static char *optr;
221	char *ptr;
222
223	if (str2 == NULL)
224	return NULL;
225
226	if (str1) {
227	optr = str1;
228	}
229	else {
230	if (*optr == '\0')
231	return NULL;
232	}
233
234	while (optr && strchr (str2, optr)) /* look for beginning of token */
235	optr++;
236
237	if (optr == '\0') / no token found */
238	return NULL;
239
240	ptr = optr;
241	while (optr && strchr (str2, optr) == NULL) /* look for end of token */
242	optr++;
243
244	if (*optr) {
245	*optr++ = '\0';
246	}
247	return ptr;
248	}
249
250	/*
251	* case insensitive strstr.
252	*/
253
254	#ifndef FP_stristr
255	char * TOOLEXPORT
256	FP_stristr (char str1, char str2)
257	{
258	char ptr1, ptr2;
259
260	if (str1==NULL)
261	return NULL;
262	if (str2==NULL)
263	return str1;
264
265	while (*(ptr1=str1)) {
266	for (ptr2=str2;
267	ptr1 && ptr2 && tolower(ptr1)==tolower(ptr2);
268	ptr1++, ptr2++)
269	/* empty loop */ ;
270
271	if (*ptr2 == '\0')
272	return str1;
273	str1++;
274	}
275	return NULL;
276	}
277	#endif
278
279	/*
280	* Nice fake of the real (non-standard) one
281	*/
282
283	char * TOOLEXPORT
284	FP_strrstr (const char ptr, const char str)
285	{
286	const char found=NULL, new, *iter=ptr;
287
288	if (ptr==NULL \|\| str==NULL)
289	return NULL;
290
291	if (*str == '\0')
292	return (char *)ptr;
293
294	while ((new = FP_strstr (iter, str)) != NULL) {
295	found = new;
296	iter = new + 1;
297	}
298
299	return (char *)found;
300	}
301
302	char * TOOLEXPORT
303	FP_strirstr (char ptr, char str)
304	{
305	char found=NULL, iter=ptr, *new;
306
307	if (ptr==NULL \|\| str==NULL)
308	return NULL;
309	if (*str == '\0')
310	return ptr;
311
312	while ((new = FP_stristr (iter, str)) != NULL) {
313	found = new;
314	iter = new + 1;
315	}
316	return found;
317	}
318
319	/*
320	* convert whole string to case
321	*/
322
323	char * TOOLEXPORT
324	FP_stoupper (char *input)
325	{
326	char *iter = input;
327
328	if (input == NULL)
329	return NULL;
330
331	while (*iter) {
332	iter = toupper (iter);
333	iter++;
334	}
335	return input;
336	}
337
338	char * TOOLEXPORT
339	FP_stolower (char *input)
340	{
341	char *iter = input;
342
343	if (input == NULL)
344	return NULL;
345
346	while (*iter) {
347	iter = tolower (iter);
348	iter++;
349	}
350	return input;
351	}
352
353	/*
354	* string matching with wildcards
355	*/
356
357	int TOOLEXPORT
358	FP_strmatch (char string, char pattern)
359	{
360	char p1 = string, p2 = pattern;
361
362	if (pattern==NULL \|\| string==NULL)
363	return 0;
364
365	while (p1 && p2) {
366	if (*p2 == '?') {
367	p1++; p2++;
368	}
369	else if (p2 == '') {
370	if (*++p2 == '\0')
371	return 1;
372	while (p1 && p1 != *p2)
373	p1++;
374	}
375	else if (p1 == p2) {
376	p1++; p2++;
377	}
378	else
379	return 0;
380	}
381	if (p1 \|\| p2)
382	return 0;
383
384	return 1;
385	}
386
387	char * TOOLEXPORT
388	FP_strrchr (const char *string, int tc)
389	{
390	const char *ptr;
391
392	if (string == NULL \|\| !*string)
393	return NULL;
394
395	ptr = string + strlen (string) - 1;
396
397	while (ptr != string && *ptr != tc)
398	ptr--;
399
400	if (*ptr == tc)
401	return (char *)ptr;
402
403	return NULL;
404	}
405
406	/*
407	* strip directory information from a filename. Works only on DOS and
408	* Unix systems so far ...
409	*/
410
411	char * TOOLEXPORT
412	FP_cutdir (char *filename)
413	{
414	char *ptr;
415
416	if (filename == NULL)
417	return NULL;
418
419	if ((ptr = FP_strrchr (filename, '/')) != NULL)
420	ptr++;
421	else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
422	ptr++;
423	else
424	ptr = filename;
425
426	return ptr;
427	}
428
429	/*
430	* My own fgets function. It handles all kinds of line terminators
431	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
432	*/
433	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
434	/* also, if the buffer is too short, the remaining line is skipped */
435	ecb_hot char * TOOLEXPORT
436	FP_fgets (char buf, int n, FILE stream)
437	{
438	char *ptr = buf;
439	char *end = buf + n - 1;
440
441	/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
442	if (n <= 0)
443	return 0;
444
445	for (;;)
446	{
447	int c = FP_getc (stream);
448
449	if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
450	{
451	/* ctlchar */
452
453	if (c == '\012')
454	/* LF, nothing following */
455	break;
456	else if (c == '\015')
457	{
458	/* CR, possibly CRLF, skip following LF */
459	c = FP_getc (stream);
460
461	if (c != '\012') /* CR LF? */
462	ungetc (c, stream);
463
464	break;
465	}
466	else if (c == EOF)
467	{
468	*ptr = 0;
469	return 0;
470	}
471	}
472
473	*ptr = c;
474	ptr += ptr < end; /* this is hopefully branch-free, and fast */
475	}
476
477	*ptr = 0;
478	return buf;
479	}
480