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 *
#	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	root	1.16	int d;
165
166			if (!str1 \|\| !str2)
167	root	1.1	return -1;
168
169	root	1.16	while (count--) {
170			if (!*str1)
171			return -1;
172
173			d = tolower (str1) - tolower (str2);
174			if (d)
175			return d;
176
177	root	1.1	str1++;
178			str2++;
179			}
180	root	1.16
181			return 0;
182	root	1.1	}
183	root	1.10	#endif
184	root	1.1
185	root	1.14	int TOOLEXPORT
186			FP_strnicmp_fast (const char str1, const char str2, int count)
187			{
188	root	1.15	if (!str1 \|\| !str2)
189	root	1.14	return -1;
190
191	root	1.16	while (count--) {
192			if (!*str1)
193			return -1;
194
195	root	1.14	if ((str1 ^ str2) & 0xdf)
196	root	1.16	return (str1 & 0xdf) - (str2 & 0xdf);
197	root	1.14
198			str1++;
199			str2++;
200			}
201
202	root	1.16	return 0;
203	root	1.14	}
204
205	root	1.1	char * TOOLEXPORT
206	root	1.13	FP_strpbrk (char str, char accept)
207	root	1.1	{
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	root	1.13	FP_strtok (char str1, char str2)
229	root	1.1	{
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	root	1.10	#ifndef FP_stristr
265	root	1.1	char * TOOLEXPORT
266	root	1.13	FP_stristr (char str1, char str2)
267	root	1.1	{
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	root	1.10	#endif
288	root	1.1
289			/*
290			* Nice fake of the real (non-standard) one
291			*/
292
293			char * TOOLEXPORT
294	root	1.15	FP_strrstr (const char ptr, const char str)
295	root	1.1	{
296	root	1.15	const char found=NULL, new, *iter=ptr;
297	root	1.1
298			if (ptr==NULL \|\| str==NULL)
299			return NULL;
300
301			if (*str == '\0')
302	root	1.15	return (char *)ptr;
303	root	1.1
304	root	1.13	while ((new = FP_strstr (iter, str)) != NULL) {
305	root	1.1	found = new;
306			iter = new + 1;
307			}
308	root	1.15
309			return (char *)found;
310	root	1.1	}
311
312			char * TOOLEXPORT
313	root	1.13	FP_strirstr (char ptr, char str)
314	root	1.1	{
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	root	1.13	while ((new = FP_stristr (iter, str)) != NULL) {
323	root	1.1	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	root	1.13	FP_stoupper (char *input)
335	root	1.1	{
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	root	1.13	FP_stolower (char *input)
350	root	1.1	{
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	root	1.13	FP_strmatch (char string, char pattern)
369	root	1.1	{
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	root	1.14	FP_strrchr (const char *string, int tc)
399	root	1.1	{
400	root	1.14	const char *ptr;
401	root	1.1
402	root	1.7	if (string == NULL \|\| !*string)
403	root	1.1	return NULL;
404
405			ptr = string + strlen (string) - 1;
406
407			while (ptr != string && *ptr != tc)
408			ptr--;
409
410			if (*ptr == tc)
411	root	1.14	return (char *)ptr;
412	root	1.1
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	root	1.13	FP_cutdir (char *filename)
423	root	1.1	{
424			char *ptr;
425
426			if (filename == NULL)
427			return NULL;
428
429	root	1.13	if ((ptr = FP_strrchr (filename, '/')) != NULL)
430	root	1.1	ptr++;
431	root	1.13	else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
432	root	1.1	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	root	1.9	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
442	root	1.1	*/
443	root	1.9	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
444	root	1.12	/* also, if the buffer is too short, the remaining line is skipped */
445	root	1.1	char * TOOLEXPORT
446	root	1.13	FP_fgets (char buf, int n, FILE stream)
447	root	1.1	{
448	root	1.12	char *ptr = buf;
449			char *end = buf + n - 1;
450	root	1.6
451			/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
452			if (n <= 0)
453	root	1.12	return 0;
454	root	1.1
455	root	1.9	for (;;)
456			{
457	root	1.13	int c = FP_getc (stream);
458	root	1.9
459	root	1.12	if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
460	root	1.9	{
461	root	1.12	/* ctlchar */
462	root	1.9
463	root	1.12	if (c == '\012')
464			/* LF, nothing following */
465			break;
466			else if (c == '\015')
467			{
468			/* CR, possibly CRLF, skip following LF */
469	root	1.13	c = FP_getc (stream);
470	root	1.12
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	root	1.9	}
482	root	1.1
483	root	1.12	*ptr = c;
484			ptr += ptr < end; /* this is hopefully branch-free, and fast */
485	root	1.1	}
486	root	1.12
487			*ptr = 0;
488			return buf;
489	root	1.1	}
490
491			/*
492			* A replacement strerror function that just returns the error code
493			*/
494
495			char * TOOLEXPORT
496	root	1.13	FP_strerror (int errcode)
497	root	1.1	{
498			static char number[8];
499
500			sprintf (number, "%03d", errcode);
501
502			return number;
503			}
504	root	1.3	#ifndef HAVE_MKSTEMP
505	root	1.1	/*
506			* tempnam is not ANSI, but tmpnam is. Ignore the prefix here.
507			*/
508
509			char * TOOLEXPORT
510	root	1.13	FP_tempnam (char dir, char pfx)
511	root	1.1	{
512	root	1.13	return FP_strdup (tmpnam (NULL));
513	root	1.1	}
514	root	1.3	#endif /* HAVE_MKSTEMP */