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_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

/*
 * 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:	1.20
Committed:	Sat Sep 24 06:05:03 2022 UTC (20 months, 1 week ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.19:	+1 -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	1.13	* 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_MALLOC_H
42			#include <malloc.h>
43			#endif
44			#ifdef HAVE_UNISTD_H
45			#include <unistd.h>
46			#endif
47			#ifdef HAVE_MEMORY_H
48			#include <memory.h>
49			#endif
50
51			#include <fptools.h>
52
53			#if 0
54			#ifdef SYSTEM_WINDLL
55			BOOL _export WINAPI
56			DllEntryPoint (HINSTANCE hInstance, DWORD seginfo,
57			LPVOID lpCmdLine)
58			{
59			/* Don't do anything, so just return true */
60			return TRUE;
61			}
62			#endif
63			#endif
64
65			/*
66			* some versions of free can't handle a NULL pointer properly
67			* (ANSI says, free ignores a NULL pointer, but some machines
68			* prefer to SIGSEGV on it)
69			*/
70
71			void TOOLEXPORT
72	root	1.13	FP_free (void *ptr)
73	root	1.1	{
74			if (ptr) free (ptr);
75			}
76
77			/*
78			* This is non-standard, so I'm defining my own
79			*/
80
81			char * TOOLEXPORT
82	root	1.13	FP_strdup (char *string)
83	root	1.1	{
84			char *result;
85
86			if (string == NULL)
87			return NULL;
88
89			if ((result = (char *) malloc (strlen (string) + 1)) == NULL)
90			return NULL;
91
92			strcpy (result, string);
93			return result;
94			}
95
96			/*
97			* limited-length string copy. this function behaves differently from
98			* the original in that the dest string is always terminated with a
99			* NULL character.
100			*/
101
102			char * TOOLEXPORT
103	root	1.13	FP_strncpy (char dest, char src, int length)
104	root	1.1	{
105			char *odest=dest;
106			if (src == NULL \|\| dest == NULL \|\| length-- <= 0)
107			return dest;
108
109			while (length-- && *src)
110			dest++ = src++;
111
112			*dest++ = '\0';
113			return odest;
114			}
115
116			/*
117			* duplicate a memory area
118			*/
119
120			void * TOOLEXPORT
121	root	1.14	FP_memdup (const void *ptr, int len)
122	root	1.1	{
123			void *result;
124
125			if (ptr == NULL)
126			return NULL;
127
128			if ((result = malloc (len)) == NULL)
129			return NULL;
130
131			memcpy (result, ptr, len);
132			return result;
133			}
134
135			/*
136			* case-insensitive compare
137			*/
138
139	root	1.10	#ifndef FP_stricmp
140	root	1.1	int TOOLEXPORT
141	root	1.13	FP_stricmp (const char str1, const char str2)
142	root	1.1	{
143			if (str1==NULL \|\| str2==NULL)
144			return -1;
145
146			while (*str1) {
147			if (tolower(str1) != tolower(str2))
148			break;
149			str1++;
150			str2++;
151			}
152			return (tolower (str1) - tolower (str2));
153			}
154	root	1.10	#endif
155	root	1.1
156	root	1.10	#ifndef FP_strnicmp
157	root	1.1	int TOOLEXPORT
158	root	1.13	FP_strnicmp (const char str1, const char str2, int count)
159	root	1.1	{
160	root	1.16	int d;
161
162			if (!str1 \|\| !str2)
163	root	1.1	return -1;
164
165	root	1.16	while (count--) {
166			if (!*str1)
167			return -1;
168
169			d = tolower (str1) - tolower (str2);
170			if (d)
171			return d;
172
173	root	1.1	str1++;
174			str2++;
175			}
176	root	1.16
177			return 0;
178	root	1.1	}
179	root	1.10	#endif
180	root	1.1
181	root	1.14	int TOOLEXPORT
182			FP_strnicmp_fast (const char str1, const char str2, int count)
183			{
184	root	1.15	if (!str1 \|\| !str2)
185	root	1.14	return -1;
186
187	root	1.16	while (count--) {
188			if (!*str1)
189			return -1;
190
191	root	1.14	if ((str1 ^ str2) & 0xdf)
192	root	1.16	return (str1 & 0xdf) - (str2 & 0xdf);
193	root	1.14
194			str1++;
195			str2++;
196			}
197
198	root	1.16	return 0;
199	root	1.14	}
200
201	root	1.1	char * TOOLEXPORT
202	root	1.13	FP_strpbrk (char str, char accept)
203	root	1.1	{
204			char *ptr;
205
206			if (str == NULL)
207			return NULL;
208			if (accept == NULL \|\| *accept == '\0')
209			return str;
210
211			for (; *str; str++)
212			for (ptr=accept; *ptr; ptr++)
213			if (str == ptr)
214			return str;
215
216			return NULL;
217			}
218
219			/*
220			* autoconf also complains about this one
221			*/
222
223			char * TOOLEXPORT
224	root	1.13	FP_strtok (char str1, char str2)
225	root	1.1	{
226			static char *optr;
227			char *ptr;
228
229			if (str2 == NULL)
230			return NULL;
231
232			if (str1) {
233			optr = str1;
234			}
235			else {
236			if (*optr == '\0')
237			return NULL;
238			}
239
240			while (optr && strchr (str2, optr)) /* look for beginning of token */
241			optr++;
242
243			if (optr == '\0') / no token found */
244			return NULL;
245
246			ptr = optr;
247			while (optr && strchr (str2, optr) == NULL) /* look for end of token */
248			optr++;
249
250			if (*optr) {
251			*optr++ = '\0';
252			}
253			return ptr;
254			}
255
256			/*
257			* case insensitive strstr.
258			*/
259
260	root	1.10	#ifndef FP_stristr
261	root	1.1	char * TOOLEXPORT
262	root	1.13	FP_stristr (char str1, char str2)
263	root	1.1	{
264			char ptr1, ptr2;
265
266			if (str1==NULL)
267			return NULL;
268			if (str2==NULL)
269			return str1;
270
271			while (*(ptr1=str1)) {
272			for (ptr2=str2;
273			ptr1 && ptr2 && tolower(ptr1)==tolower(ptr2);
274			ptr1++, ptr2++)
275			/* empty loop */ ;
276
277			if (*ptr2 == '\0')
278			return str1;
279			str1++;
280			}
281			return NULL;
282			}
283	root	1.10	#endif
284	root	1.1
285			/*
286			* Nice fake of the real (non-standard) one
287			*/
288
289			char * TOOLEXPORT
290	root	1.15	FP_strrstr (const char ptr, const char str)
291	root	1.1	{
292	root	1.15	const char found=NULL, new, *iter=ptr;
293	root	1.1
294			if (ptr==NULL \|\| str==NULL)
295			return NULL;
296
297			if (*str == '\0')
298	root	1.15	return (char *)ptr;
299	root	1.1
300	root	1.13	while ((new = FP_strstr (iter, str)) != NULL) {
301	root	1.1	found = new;
302			iter = new + 1;
303			}
304	root	1.15
305			return (char *)found;
306	root	1.1	}
307
308			char * TOOLEXPORT
309	root	1.13	FP_strirstr (char ptr, char str)
310	root	1.1	{
311			char found=NULL, iter=ptr, *new;
312
313			if (ptr==NULL \|\| str==NULL)
314			return NULL;
315			if (*str == '\0')
316			return ptr;
317
318	root	1.13	while ((new = FP_stristr (iter, str)) != NULL) {
319	root	1.1	found = new;
320			iter = new + 1;
321			}
322			return found;
323			}
324
325			/*
326			* convert whole string to case
327			*/
328
329			char * TOOLEXPORT
330	root	1.13	FP_stoupper (char *input)
331	root	1.1	{
332			char *iter = input;
333
334			if (input == NULL)
335			return NULL;
336
337			while (*iter) {
338			iter = toupper (iter);
339			iter++;
340			}
341			return input;
342			}
343
344			char * TOOLEXPORT
345	root	1.13	FP_stolower (char *input)
346	root	1.1	{
347			char *iter = input;
348
349			if (input == NULL)
350			return NULL;
351
352			while (*iter) {
353			iter = tolower (iter);
354			iter++;
355			}
356			return input;
357			}
358
359			/*
360			* string matching with wildcards
361			*/
362
363			int TOOLEXPORT
364	root	1.13	FP_strmatch (char string, char pattern)
365	root	1.1	{
366			char p1 = string, p2 = pattern;
367
368			if (pattern==NULL \|\| string==NULL)
369			return 0;
370
371			while (p1 && p2) {
372			if (*p2 == '?') {
373			p1++; p2++;
374			}
375			else if (p2 == '') {
376			if (*++p2 == '\0')
377			return 1;
378			while (p1 && p1 != *p2)
379			p1++;
380			}
381			else if (p1 == p2) {
382			p1++; p2++;
383			}
384			else
385			return 0;
386			}
387			if (p1 \|\| p2)
388			return 0;
389
390			return 1;
391			}
392
393			char * TOOLEXPORT
394	root	1.14	FP_strrchr (const char *string, int tc)
395	root	1.1	{
396	root	1.14	const char *ptr;
397	root	1.1
398	root	1.7	if (string == NULL \|\| !*string)
399	root	1.1	return NULL;
400
401			ptr = string + strlen (string) - 1;
402
403			while (ptr != string && *ptr != tc)
404			ptr--;
405
406			if (*ptr == tc)
407	root	1.14	return (char *)ptr;
408	root	1.1
409			return NULL;
410			}
411
412			/*
413			* strip directory information from a filename. Works only on DOS and
414			* Unix systems so far ...
415			*/
416
417			char * TOOLEXPORT
418	root	1.13	FP_cutdir (char *filename)
419	root	1.1	{
420			char *ptr;
421
422			if (filename == NULL)
423			return NULL;
424
425	root	1.13	if ((ptr = FP_strrchr (filename, '/')) != NULL)
426	root	1.1	ptr++;
427	root	1.13	else if ((ptr = FP_strrchr (filename, '\\')) != NULL)
428	root	1.1	ptr++;
429			else
430			ptr = filename;
431
432			return ptr;
433			}
434
435			/*
436			* My own fgets function. It handles all kinds of line terminators
437	root	1.9	* properly: LF (Unix), CRLF (DOS) and CR (Mac).
438	root	1.1	*/
439	root	1.9	/* (schmorp) the buffer is always written to, and no LF is stored at the end */
440	root	1.12	/* also, if the buffer is too short, the remaining line is skipped */
441	root	1.18	ecb_hot char * TOOLEXPORT
442	root	1.13	FP_fgets (char buf, int n, FILE stream)
443	root	1.1	{
444	root	1.12	char *ptr = buf;
445			char *end = buf + n - 1;
446	root	1.6
447			/* shield against buffer overflows caused by "255 - bytes_left"-kind of bugs when bytes_left > 255 */
448			if (n <= 0)
449	root	1.12	return 0;
450	root	1.1
451	root	1.9	for (;;)
452			{
453	root	1.13	int c = FP_getc (stream);
454	root	1.9
455	root	1.12	if (ecb_expect_false (c <= '\015')) /* EOF is < 0x20, too */
456	root	1.9	{
457	root	1.12	/* ctlchar */
458	root	1.9
459	root	1.12	if (c == '\012')
460			/* LF, nothing following */
461			break;
462			else if (c == '\015')
463			{
464			/* CR, possibly CRLF, skip following LF */
465	root	1.13	c = FP_getc (stream);
466	root	1.12
467			if (c != '\012') /* CR LF? */
468			ungetc (c, stream);
469
470			break;
471			}
472			else if (c == EOF)
473			{
474			*ptr = 0;
475			return 0;
476			}
477	root	1.9	}
478	root	1.1
479	root	1.12	*ptr = c;
480			ptr += ptr < end; /* this is hopefully branch-free, and fast */
481	root	1.1	}
482	root	1.12
483			*ptr = 0;
484			return buf;
485	root	1.1	}
486