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 (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

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

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

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

  while ((new = _FP_strstr (iter, str)) != NULL) {
    found = new;
    iter  = new + 1;
  }
  return 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 (char *string, int tc)
{
  char *ptr;

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

  ptr = string + strlen (string) - 1;

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

  if (*ptr == tc)
    return 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 */
char * TOOLEXPORT
_FP_fgets (char *buf, int n, FILE *stream)
{
  static char format[64];
  static int format_n = 0;
  int res;
  int c;

  /* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
  if (n <= 0)
    return NULL;

  if (format_n != n)
    {
      sprintf (format, "%%%d[^\015\012]", n - 1);
      format_n = n;
    }

  *buf = 0; /* fscanf return s0 on empty lines */
  res = fscanf (stream, format, buf);

  if (res == EOF)
    return 0; /* an error occured */

  /* skip line endings */
  for (;;)
    {
      c = _FP_fgetc (stream);

      if (c == '\012') /* LF */
        return buf;
      else if (c == '\015') /* CR */
        {
          c = _FP_fgetc (stream);
          if (c != '\012') /* CR LF? */
            ungetc (c, stream);

          return buf;
        }
      else if (c == EOF)
        return 0; /* error */

      /* skip remaining line */
    }
}

/*
 * 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:	1.11
Committed:	Sun Feb 9 15:06:43 2020 UTC (4 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.10:	+2 -3 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	1.5	* 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	1.5	* _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	1.5	* 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	1.5	_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	1.5	_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	1.5	_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	1.5	_FP_memdup (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	1.11	_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	1.11	_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			char * TOOLEXPORT
179	root	1.5	_FP_strpbrk (char str, char accept)
180	root	1.1	{
181			char *ptr;
182
183			if (str == NULL)
184			return NULL;
185			if (accept == NULL \|\| *accept == '\0')
186			return str;
187
188			for (; *str; str++)
189			for (ptr=accept; *ptr; ptr++)
190			if (str == ptr)
191			return str;
192
193			return NULL;
194			}
195
196			/*
197			* autoconf also complains about this one
198			*/
199
200			char * TOOLEXPORT
201	root	1.5	_FP_strtok (char str1, char str2)
202	root	1.1	{
203			static char *optr;
204			char *ptr;
205
206			if (str2 == NULL)
207			return NULL;
208
209			if (str1) {
210			optr = str1;
211			}
212			else {
213			if (*optr == '\0')
214			return NULL;
215			}
216
217			while (optr && strchr (str2, optr)) /* look for beginning of token */
218			optr++;
219
220			if (optr == '\0') / no token found */
221			return NULL;
222
223			ptr = optr;
224			while (optr && strchr (str2, optr) == NULL) /* look for end of token */
225			optr++;
226
227			if (*optr) {
228			*optr++ = '\0';
229			}
230			return ptr;
231			}
232
233			/*
234			* case insensitive strstr.
235			*/
236
237	root	1.10	#ifndef FP_stristr
238	root	1.1	char * TOOLEXPORT
239	root	1.5	_FP_stristr (char str1, char str2)
240	root	1.1	{
241			char ptr1, ptr2;
242
243			if (str1==NULL)
244			return NULL;
245			if (str2==NULL)
246			return str1;
247
248			while (*(ptr1=str1)) {
249			for (ptr2=str2;
250			ptr1 && ptr2 && tolower(ptr1)==tolower(ptr2);
251			ptr1++, ptr2++)
252			/* empty loop */ ;
253
254			if (*ptr2 == '\0')
255			return str1;
256			str1++;
257			}
258			return NULL;
259			}
260	root	1.10	#endif
261	root	1.1
262			/*
263			* Nice fake of the real (non-standard) one
264			*/
265
266			char * TOOLEXPORT
267	root	1.5	_FP_strrstr (char ptr, char str)
268	root	1.1	{
269			char found=NULL, new, *iter=ptr;
270
271			if (ptr==NULL \|\| str==NULL)
272			return NULL;
273
274			if (*str == '\0')
275			return ptr;
276
277	root	1.5	while ((new = _FP_strstr (iter, str)) != NULL) {
278	root	1.1	found = new;
279			iter = new + 1;
280			}
281			return found;
282			}
283
284			char * TOOLEXPORT
285	root	1.5	_FP_strirstr (char ptr, char str)
286	root	1.1	{
287			char found=NULL, iter=ptr, *new;
288
289			if (ptr==NULL \|\| str==NULL)
290			return NULL;
291			if (*str == '\0')
292			return ptr;
293
294	root	1.5	while ((new = _FP_stristr (iter, str)) != NULL) {
295	root	1.1	found = new;
296			iter = new + 1;
297			}
298			return found;
299			}
300
301			/*
302			* convert whole string to case
303			*/
304
305			char * TOOLEXPORT
306	root	1.5	_FP_stoupper (char *input)
307	root	1.1	{
308			char *iter = input;
309
310			if (input == NULL)
311			return NULL;
312
313			while (*iter) {
314			iter = toupper (iter);
315			iter++;
316			}
317			return input;
318			}
319
320			char * TOOLEXPORT
321	root	1.5	_FP_stolower (char *input)
322	root	1.1	{
323			char *iter = input;
324
325			if (input == NULL)
326			return NULL;
327
328			while (*iter) {
329			iter = tolower (iter);
330			iter++;
331			}
332			return input;
333			}
334
335			/*
336			* string matching with wildcards
337			*/
338
339			int TOOLEXPORT
340	root	1.5	_FP_strmatch (char string, char pattern)
341	root	1.1	{
342			char p1 = string, p2 = pattern;
343
344			if (pattern==NULL \|\| string==NULL)
345			return 0;
346
347			while (p1 && p2) {
348			if (*p2 == '?') {
349			p1++; p2++;
350			}
351			else if (p2 == '') {
352			if (*++p2 == '\0')
353			return 1;
354			while (p1 && p1 != *p2)
355			p1++;
356			}
357			else if (p1 == p2) {
358			p1++; p2++;
359			}
360			else
361			return 0;
362			}
363			if (p1 \|\| p2)
364			return 0;
365
366			return 1;
367			}
368
369			char * TOOLEXPORT
370	root	1.5	_FP_strrchr (char *string, int tc)
371	root	1.1	{
372			char *ptr;
373
374	root	1.7	if (string == NULL \|\| !*string)
375	root	1.1	return NULL;
376
377			ptr = string + strlen (string) - 1;
378
379			while (ptr != string && *ptr != tc)
380			ptr--;
381
382			if (*ptr == tc)
383			return ptr;
384
385			return NULL;
386			}
387
388			/*
389			* strip directory information from a filename. Works only on DOS and
390			* Unix systems so far ...
391			*/
392
393			char * TOOLEXPORT
394	root	1.5	_FP_cutdir (char *filename)
395	root	1.1	{
396			char *ptr;
397
398			if (filename == NULL)
399			return NULL;
400
401	root	1.5	if ((ptr = _FP_strrchr (filename, '/')) != NULL)
402	root	1.1	ptr++;
403	root	1.5	else if ((ptr = _FP_strrchr (filename, '\\')) != NULL)
404	root	1.1	ptr++;
405			else
406			ptr = filename;
407
408			return ptr;
409			}
410
411			/*
412			* My own fgets function. It handles all kinds of line terminators
413	root	1.9	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
414	root	1.1	*/
415	root	1.9	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
416	root	1.1	char * TOOLEXPORT
417	root	1.5	_FP_fgets (char buf, int n, FILE stream)
418	root	1.1	{
419	root	1.9	static char format[64];
420			static int format_n = 0;
421			int res;
422	root	1.1	int c;
423	root	1.6
424			/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
425			if (n <= 0)
426			return NULL;
427	root	1.1
428	root	1.9	if (format_n != n)
429			{
430			sprintf (format, "%%%d[^\015\012]", n - 1);
431			format_n = n;
432			}
433
434			buf = 0; / fscanf return s0 on empty lines */
435			res = fscanf (stream, format, buf);
436
437			if (res == EOF)
438			return 0; /* an error occured */
439
440	root	1.10	/* skip line endings */
441	root	1.9	for (;;)
442			{
443			c = _FP_fgetc (stream);
444
445			if (c == '\012') /* LF */
446			return buf;
447			else if (c == '\015') /* CR */
448			{
449			c = _FP_fgetc (stream);
450			if (c != '\012') /* CR LF? */
451			ungetc (c, stream);
452
453			return buf;
454			}
455			else if (c == EOF)
456			return 0; /* error */
457	root	1.1
458	root	1.9	/* skip remaining line */
459	root	1.1	}
460			}
461
462			/*
463			* A replacement strerror function that just returns the error code
464			*/
465
466			char * TOOLEXPORT
467	root	1.5	_FP_strerror (int errcode)
468	root	1.1	{
469			static char number[8];
470
471			sprintf (number, "%03d", errcode);
472
473			return number;
474			}
475	root	1.3	#ifndef HAVE_MKSTEMP
476	root	1.1	/*
477			* tempnam is not ANSI, but tmpnam is. Ignore the prefix here.
478			*/
479
480			char * TOOLEXPORT
481	root	1.5	_FP_tempnam (char dir, char pfx)
482	root	1.1	{
483	root	1.5	return _FP_strdup (tmpnam (NULL));
484	root	1.1	}
485	root	1.3	#endif /* HAVE_MKSTEMP */