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)
{
  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

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

  while (*str1 && count) {
    if ((*str1 ^ *str2) & 0xdf)
      break;

    str1++;
    str2++;
    count--;
  }

  return (*str1 & 0xdf) - (*str2 & 0xdf);
}

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:	1.15
Committed:	Fri Dec 11 21:59:30 2020 UTC (3 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.14:	+6 -5 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	/*
2			* fptools.c, some helper functions for getcgi.c and uu(en\|de)view
3			*
4	root	1.2	* Distributed under the terms of the GNU General Public License.
5			* Use and be happy.
6	root	1.1	*/
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	root	1.13	* AC_CHECK_FUNC(strrchr,AC_DEFINE(strrchr,FP_strrchr))
26	root	1.1	* 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	root	1.13	* FP_free) or provide extended functionality (FP_gets).
30	root	1.1	* The above is not used in the uuenview/uudeview configuration script,
31			* since both only use the replacement functions in non-performance-cri-
32	root	1.13	* tical sections (except for FP_tempnam and FP_strerror, where some
33	root	1.1	* 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	root	1.7	char * fptools_id = "$Id$";
68	root	1.1
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	root	1.13	FP_free (void *ptr)
77	root	1.1	{
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	root	1.13	FP_strdup (char *string)
87	root	1.1	{
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	root	1.13	FP_strncpy (char dest, char src, int length)
108	root	1.1	{
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	root	1.14	FP_memdup (const void *ptr, int len)
126	root	1.1	{
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	root	1.10	#ifndef FP_stricmp
144	root	1.1	int TOOLEXPORT
145	root	1.13	FP_stricmp (const char str1, const char str2)
146	root	1.1	{
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	root	1.10	#endif
159	root	1.1
160	root	1.10	#ifndef FP_strnicmp
161	root	1.1	int TOOLEXPORT
162	root	1.13	FP_strnicmp (const char str1, const char str2, int count)
163	root	1.1	{
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	root	1.10	#endif
177	root	1.1
178	root	1.14	int TOOLEXPORT
179			FP_strnicmp_fast (const char str1, const char str2, int count)
180			{
181	root	1.15	if (!str1 \|\| !str2)
182	root	1.14	return -1;
183
184			while (*str1 && count) {
185			if ((str1 ^ str2) & 0xdf)
186			break;
187
188			str1++;
189			str2++;
190			count--;
191			}
192
193			return (str1 & 0xdf) - (str2 & 0xdf);
194			}
195
196	root	1.1	char * TOOLEXPORT
197	root	1.13	FP_strpbrk (char str, char accept)
198	root	1.1	{
199			char *ptr;
200
201			if (str == NULL)
202			return NULL;
203			if (accept == NULL \|\| *accept == '\0')
204			return str;
205
206			for (; *str; str++)
207			for (ptr=accept; *ptr; ptr++)
208			if (str == ptr)
209			return str;
210
211			return NULL;
212			}
213
214			/*
215			* autoconf also complains about this one
216			*/
217
218			char * TOOLEXPORT
219	root	1.13	FP_strtok (char str1, char str2)
220	root	1.1	{
221			static char *optr;
222			char *ptr;
223
224			if (str2 == NULL)
225			return NULL;
226
227			if (str1) {
228			optr = str1;
229			}
230			else {
231			if (*optr == '\0')
232			return NULL;
233			}
234
235			while (optr && strchr (str2, optr)) /* look for beginning of token */
236			optr++;
237
238			if (optr == '\0') / no token found */
239			return NULL;
240
241			ptr = optr;
242			while (optr && strchr (str2, optr) == NULL) /* look for end of token */
243			optr++;
244
245			if (*optr) {
246			*optr++ = '\0';
247			}
248			return ptr;
249			}
250
251			/*
252			* case insensitive strstr.
253			*/
254
255	root	1.10	#ifndef FP_stristr
256	root	1.1	char * TOOLEXPORT
257	root	1.13	FP_stristr (char str1, char str2)
258	root	1.1	{
259			char ptr1, ptr2;
260
261			if (str1==NULL)
262			return NULL;
263			if (str2==NULL)
264			return str1;
265
266			while (*(ptr1=str1)) {
267			for (ptr2=str2;
268			ptr1 && ptr2 && tolower(ptr1)==tolower(ptr2);
269			ptr1++, ptr2++)
270			/* empty loop */ ;
271
272			if (*ptr2 == '\0')
273			return str1;
274			str1++;
275			}
276			return NULL;
277			}
278	root	1.10	#endif
279	root	1.1
280			/*
281			* Nice fake of the real (non-standard) one
282			*/
283
284			char * TOOLEXPORT
285	root	1.15	FP_strrstr (const char ptr, const char str)
286	root	1.1	{
287	root	1.15	const char found=NULL, new, *iter=ptr;
288	root	1.1
289			if (ptr==NULL \|\| str==NULL)
290			return NULL;
291
292			if (*str == '\0')
293	root	1.15	return (char *)ptr;
294	root	1.1
295	root	1.13	while ((new = FP_strstr (iter, str)) != NULL) {
296	root	1.1	found = new;
297			iter = new + 1;
298			}
299	root	1.15
300			return (char *)found;
301	root	1.1	}
302
303			char * TOOLEXPORT
304	root	1.13	FP_strirstr (char ptr, char str)
305	root	1.1	{
306			char found=NULL, iter=ptr, *new;
307
308			if (ptr==NULL \|\| str==NULL)
309			return NULL;
310			if (*str == '\0')
311			return ptr;
312
313	root	1.13	while ((new = FP_stristr (iter, str)) != NULL) {
314	root	1.1	found = new;
315			iter = new + 1;
316			}
317			return found;
318			}
319
320			/*
321			* convert whole string to case
322			*/
323
324			char * TOOLEXPORT
325	root	1.13	FP_stoupper (char *input)
326	root	1.1	{
327			char *iter = input;
328
329			if (input == NULL)
330			return NULL;
331
332			while (*iter) {
333			iter = toupper (iter);
334			iter++;
335			}
336			return input;
337			}
338
339			char * TOOLEXPORT
340	root	1.13	FP_stolower (char *input)
341	root	1.1	{
342			char *iter = input;
343
344			if (input == NULL)
345			return NULL;
346
347			while (*iter) {
348			iter = tolower (iter);
349			iter++;
350			}
351			return input;
352			}
353
354			/*
355			* string matching with wildcards
356			*/
357
358			int TOOLEXPORT
359	root	1.13	FP_strmatch (char string, char pattern)
360	root	1.1	{
361			char p1 = string, p2 = pattern;
362
363			if (pattern==NULL \|\| string==NULL)
364			return 0;
365
366			while (p1 && p2) {
367			if (*p2 == '?') {
368			p1++; p2++;
369			}
370			else if (p2 == '') {
371			if (*++p2 == '\0')
372			return 1;
373			while (p1 && p1 != *p2)
374			p1++;
375			}
376			else if (p1 == p2) {
377			p1++; p2++;
378			}
379			else
380			return 0;
381			}
382			if (p1 \|\| p2)
383			return 0;
384
385			return 1;
386			}
387
388			char * TOOLEXPORT
389	root	1.14	FP_strrchr (const char *string, int tc)
390	root	1.1	{
391	root	1.14	const char *ptr;
392	root	1.1
393	root	1.7	if (string == NULL \|\| !*string)
394	root	1.1	return NULL;
395
396			ptr = string + strlen (string) - 1;
397
398			while (ptr != string && *ptr != tc)
399			ptr--;
400
401			if (*ptr == tc)
402	root	1.14	return (char *)ptr;
403	root	1.1
404			return NULL;
405			}
406
407			/*
408			* strip directory information from a filename. Works only on DOS and
409			* Unix systems so far ...
410			*/
411
412			char * TOOLEXPORT
413	root	1.13	FP_cutdir (char *filename)
414	root	1.1	{
415			char *ptr;
416
417			if (filename == NULL)
418			return NULL;
419
420	root	1.13	if ((ptr = FP_strrchr (filename, '/')) != NULL)
421	root	1.1	ptr++;
422	root	1.13	else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
423	root	1.1	ptr++;
424			else
425			ptr = filename;
426
427			return ptr;
428			}
429
430			/*
431			* My own fgets function. It handles all kinds of line terminators
432	root	1.9	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
433	root	1.1	*/
434	root	1.9	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
435	root	1.12	/* also, if the buffer is too short, the remaining line is skipped */
436	root	1.1	char * TOOLEXPORT
437	root	1.13	FP_fgets (char buf, int n, FILE stream)
438	root	1.1	{
439	root	1.12	char *ptr = buf;
440			char *end = buf + n - 1;
441	root	1.6
442			/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
443			if (n <= 0)
444	root	1.12	return 0;
445	root	1.1
446	root	1.9	for (;;)
447			{
448	root	1.13	int c = FP_getc (stream);
449	root	1.9
450	root	1.12	if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
451	root	1.9	{
452	root	1.12	/* ctlchar */
453	root	1.9
454	root	1.12	if (c == '\012')
455			/* LF, nothing following */
456			break;
457			else if (c == '\015')
458			{
459			/* CR, possibly CRLF, skip following LF */
460	root	1.13	c = FP_getc (stream);
461	root	1.12
462			if (c != '\012') /* CR LF? */
463			ungetc (c, stream);
464
465			break;
466			}
467			else if (c == EOF)
468			{
469			*ptr = 0;
470			return 0;
471			}
472	root	1.9	}
473	root	1.1
474	root	1.12	*ptr = c;
475			ptr += ptr < end; /* this is hopefully branch-free, and fast */
476	root	1.1	}
477	root	1.12
478			*ptr = 0;
479			return buf;
480	root	1.1	}
481
482			/*
483			* A replacement strerror function that just returns the error code
484			*/
485
486			char * TOOLEXPORT
487	root	1.13	FP_strerror (int errcode)
488	root	1.1	{
489			static char number[8];
490
491			sprintf (number, "%03d", errcode);
492
493			return number;
494			}
495	root	1.3	#ifndef HAVE_MKSTEMP
496	root	1.1	/*
497			* tempnam is not ANSI, but tmpnam is. Ignore the prefix here.
498			*/
499
500			char * TOOLEXPORT
501	root	1.13	FP_tempnam (char dir, char pfx)
502	root	1.1	{
503	root	1.13	return FP_strdup (tmpnam (NULL));
504	root	1.1	}
505	root	1.3	#endif /* HAVE_MKSTEMP */