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 (20 months, 1 week ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.20:	+0 -6 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			#include <stdlib.h>
39			#include <string.h>
40	root	1.20
41	root	1.1	#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	root	1.13	FP_free (void *ptr)
67	root	1.1	{
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	root	1.13	FP_strdup (char *string)
77	root	1.1	{
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	root	1.13	FP_strncpy (char dest, char src, int length)
98	root	1.1	{
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	root	1.14	FP_memdup (const void *ptr, int len)
116	root	1.1	{
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	root	1.10	#ifndef FP_stricmp
134	root	1.1	int TOOLEXPORT
135	root	1.13	FP_stricmp (const char str1, const char str2)
136	root	1.1	{
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	root	1.10	#endif
149	root	1.1
150	root	1.10	#ifndef FP_strnicmp
151	root	1.1	int TOOLEXPORT
152	root	1.13	FP_strnicmp (const char str1, const char str2, int count)
153	root	1.1	{
154	root	1.16	int d;
155
156			if (!str1 \|\| !str2)
157	root	1.1	return -1;
158
159	root	1.16	while (count--) {
160			if (!*str1)
161			return -1;
162
163			d = tolower (str1) - tolower (str2);
164			if (d)
165			return d;
166
167	root	1.1	str1++;
168			str2++;
169			}
170	root	1.16
171			return 0;
172	root	1.1	}
173	root	1.10	#endif
174	root	1.1
175	root	1.14	int TOOLEXPORT
176			FP_strnicmp_fast (const char str1, const char str2, int count)
177			{
178	root	1.15	if (!str1 \|\| !str2)
179	root	1.14	return -1;
180
181	root	1.16	while (count--) {
182			if (!*str1)
183			return -1;
184
185	root	1.14	if ((str1 ^ str2) & 0xdf)
186	root	1.16	return (str1 & 0xdf) - (str2 & 0xdf);
187	root	1.14
188			str1++;
189			str2++;
190			}
191
192	root	1.16	return 0;
193	root	1.14	}
194
195	root	1.1	char * TOOLEXPORT
196	root	1.13	FP_strpbrk (char str, char accept)
197	root	1.1	{
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	root	1.13	FP_strtok (char str1, char str2)
219	root	1.1	{
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	root	1.10	#ifndef FP_stristr
255	root	1.1	char * TOOLEXPORT
256	root	1.13	FP_stristr (char str1, char str2)
257	root	1.1	{
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	root	1.10	#endif
278	root	1.1
279			/*
280			* Nice fake of the real (non-standard) one
281			*/
282
283			char * TOOLEXPORT
284	root	1.15	FP_strrstr (const char ptr, const char str)
285	root	1.1	{
286	root	1.15	const char found=NULL, new, *iter=ptr;
287	root	1.1
288			if (ptr==NULL \|\| str==NULL)
289			return NULL;
290
291			if (*str == '\0')
292	root	1.15	return (char *)ptr;
293	root	1.1
294	root	1.13	while ((new = FP_strstr (iter, str)) != NULL) {
295	root	1.1	found = new;
296			iter = new + 1;
297			}
298	root	1.15
299			return (char *)found;
300	root	1.1	}
301
302			char * TOOLEXPORT
303	root	1.13	FP_strirstr (char ptr, char str)
304	root	1.1	{
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	root	1.13	while ((new = FP_stristr (iter, str)) != NULL) {
313	root	1.1	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	root	1.13	FP_stoupper (char *input)
325	root	1.1	{
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	root	1.13	FP_stolower (char *input)
340	root	1.1	{
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	root	1.13	FP_strmatch (char string, char pattern)
359	root	1.1	{
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	root	1.14	FP_strrchr (const char *string, int tc)
389	root	1.1	{
390	root	1.14	const char *ptr;
391	root	1.1
392	root	1.7	if (string == NULL \|\| !*string)
393	root	1.1	return NULL;
394
395			ptr = string + strlen (string) - 1;
396
397			while (ptr != string && *ptr != tc)
398			ptr--;
399
400			if (*ptr == tc)
401	root	1.14	return (char *)ptr;
402	root	1.1
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	root	1.13	FP_cutdir (char *filename)
413	root	1.1	{
414			char *ptr;
415
416			if (filename == NULL)
417			return NULL;
418
419	root	1.13	if ((ptr = FP_strrchr (filename, '/')) != NULL)
420	root	1.1	ptr++;
421	root	1.13	else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
422	root	1.1	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	root	1.9	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
432	root	1.1	*/
433	root	1.9	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
434	root	1.12	/* also, if the buffer is too short, the remaining line is skipped */
435	root	1.18	ecb_hot char * TOOLEXPORT
436	root	1.13	FP_fgets (char buf, int n, FILE stream)
437	root	1.1	{
438	root	1.12	char *ptr = buf;
439			char *end = buf + n - 1;
440	root	1.6
441			/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
442			if (n <= 0)
443	root	1.12	return 0;
444	root	1.1
445	root	1.9	for (;;)
446			{
447	root	1.13	int c = FP_getc (stream);
448	root	1.9
449	root	1.12	if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
450	root	1.9	{
451	root	1.12	/* ctlchar */
452	root	1.9
453	root	1.12	if (c == '\012')
454			/* LF, nothing following */
455			break;
456			else if (c == '\015')
457			{
458			/* CR, possibly CRLF, skip following LF */
459	root	1.13	c = FP_getc (stream);
460	root	1.12
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	root	1.9	}
472	root	1.1
473	root	1.12	*ptr = c;
474			ptr += ptr < end; /* this is hopefully branch-free, and fast */
475	root	1.1	}
476	root	1.12
477			*ptr = 0;
478			return buf;
479	root	1.1	}
480