8.1.0beta2/src/irc_string.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  irc_string.c: IRC string functions.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

#include "config.h"
#ifdef HAVE_LIBPCRE
#include <pcre.h>
#endif

#include "stdinc.h"
#include "irc_string.h"


int
has_wildcards(const char *s)
{
  char c;

  while ((c = *s++))
    if (IsMWildChar(c))
      return 1;

  return 0;
}

/*
 * myctime - This is like standard ctime()-function, but it zaps away
 *   the newline from the end of that string. Also, it takes
 *   the time value as parameter, instead of pointer to it.
 *   Note that it is necessary to copy the string to alternate
 *   buffer (who knows how ctime() implements it, maybe it statically
 *   has newline there and never 'refreshes' it -- zapping that
 *   might break things in other places...)
 *
 *
 * Thu Nov 24 18:22:48 1986 
 */
const char *
myctime(time_t value)
{
  static char buf[32];
  char *p;

  strlcpy(buf, ctime(&value), sizeof(buf));

  if ((p = strchr(buf, '\n')) != NULL)
    *p = '\0';
  return buf;
}

/*
 * strip_tabs(dst, src, length)
 *
 *   Copies src to dst, while converting all \t (tabs) into spaces.
 */
void
strip_tabs(char *dest, const char *src, size_t len)
{
  char *d = dest;

  /* Sanity check; we don't want anything nasty... */
  assert(dest != NULL);
  assert(src  != NULL);
  assert(len > 0);

  for (; --len && *src; ++src)
    *d++ = *src == '\t' ? ' ' : *src;

  *d = '\0'; /* NUL terminate, thanks and goodbye */
}

/*
 * strtoken - walk through a string of tokens, using a set of separators
 *   argv 9/90
 *
 */
#ifndef HAVE_STRTOK_R

char *
strtoken(char** save, char* str, const char* fs)
{
  char* pos = *save;  /* keep last position across calls */
  char* tmp;

  if (str)
    pos = str;    /* new string scan */

  while (pos && *pos && strchr(fs, *pos) != NULL)
    ++pos;        /* skip leading separators */

  if (!pos || !*pos)
    return (pos = *save = NULL);   /* string contains only sep's */

  tmp = pos;       /* now, keep position of the token */

  while (*pos && strchr(fs, *pos) == NULL)
    ++pos;       /* skip content of the token */

  if (*pos)
    *pos++ = '\0';    /* remove first sep after the token */
  else
    pos = NULL;    /* end of string */

  *save = pos;
  return tmp;
}
#endif /* !HAVE_STRTOK_R */

/* libio_basename()
 *
 * input        - i.e. "/usr/local/ircd/modules/m_whois.so"
 * output       - i.e. "m_whois.so"
 * side effects - this will be overwritten on subsequent calls
 */
const char *
libio_basename(const char *path)
{
  const char *s;

  if ((s = strrchr(path, '/')) == NULL)
    s = path;
  else
    s++;

  return s;
}

/*
 * strlcat and strlcpy were ripped from openssh 2.5.1p2
 * They had the following Copyright info: 
 *
 *
 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright    
 *    notice, this list of conditions and the following disclaimer in the  
 *    documentation and/or other materials provided with the distribution. 
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef HAVE_STRLCAT
size_t
strlcat(char *dst, const char *src, size_t siz)
{
  char *d = dst;
  const char *s = src;
  size_t n = siz, dlen;

  while (n-- != 0 && *d != '\0')
    d++;

  dlen = d - dst;
  n    = siz - dlen;

  if (n == 0)
    return dlen + strlen(s);

  while (*s != '\0')
  {
    if (n != 1)
    {
      *d++ = *s;
      n--;
    }

    s++;
  }

  *d = '\0';
  return dlen + (s - src); /* count does not include NUL */
}
#endif

#ifndef HAVE_STRLCPY
size_t
strlcpy(char *dst, const char *src, size_t siz)
{
  char *d = dst;
  const char *s = src;
  size_t n = siz;

  /* Copy as many bytes as will fit */
  if (n != 0 && --n != 0)
  {
    do
    {
      if ((*d++ = *s++) == 0)
        break;
    } while (--n != 0);
  }

  /* Not enough room in dst, add NUL and traverse rest of src */
  if (n == 0)
  {
    if (siz != 0)
      *d = '\0'; /* NUL-terminate dst */
    while (*s++)
      ;
  }

  return s - src - 1; /* count does not include NUL */
}
#endif

#ifdef HAVE_LIBPCRE
void *
ircd_pcre_compile(const char *pattern, const char **errptr)
{
  int erroroffset = 0;
  int options = PCRE_EXTRA;

  assert(pattern);

  return pcre_compile(pattern, options, errptr, &erroroffset, NULL);
}

int
ircd_pcre_exec(const void *code, const char *subject)
{
  assert(code && subject);

  return pcre_exec(code, NULL, subject, strlen(subject), 0, 0, NULL, 0) < 0;
}
#endif
Revision:	1801
Committed:	Mon Apr 1 11:54:07 2013 UTC (13 years, 3 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid/trunk/src/irc_string.c*
File size:	6395 byte(s)
Log Message:	- myctime(): replaced strcpy() with strlcpy()
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* irc_string.c: IRC string functions.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25	michael	1009	#include "config.h"
26			#ifdef HAVE_LIBPCRE
27			#include <pcre.h>
28			#endif
29
30	adx	30	#include "stdinc.h"
31			#include "irc_string.h"
32
33
34	michael	1400	int
35			has_wildcards(const char *s)
36			{
37			char c;
38
39			while ((c = *s++))
40			if (IsMWildChar(c))
41			return 1;
42
43			return 0;
44			}
45
46	adx	30	/*
47			* myctime - This is like standard ctime()-function, but it zaps away
48			* the newline from the end of that string. Also, it takes
49			* the time value as parameter, instead of pointer to it.
50			* Note that it is necessary to copy the string to alternate
51			* buffer (who knows how ctime() implements it, maybe it statically
52			* has newline there and never 'refreshes' it -- zapping that
53			* might break things in other places...)
54			*
55			*
56			* Thu Nov 24 18:22:48 1986
57			*/
58			const char *
59			myctime(time_t value)
60			{
61			static char buf[32];
62			char *p;
63
64	michael	1801	strlcpy(buf, ctime(&value), sizeof(buf));
65	adx	30
66			if ((p = strchr(buf, '\n')) != NULL)
67			*p = '\0';
68			return buf;
69			}
70
71			/*
72			* strip_tabs(dst, src, length)
73			*
74			* Copies src to dst, while converting all \t (tabs) into spaces.
75			*/
76			void
77			strip_tabs(char dest, const char src, size_t len)
78			{
79			char *d = dest;
80
81			/* Sanity check; we don't want anything nasty... */
82			assert(dest != NULL);
83			assert(src != NULL);
84			assert(len > 0);
85
86			for (; --len && *src; ++src)
87			d++ = src == '\t' ? ' ' : *src;
88
89			d = '\0'; / NUL terminate, thanks and goodbye */
90			}
91
92			/*
93			* strtoken - walk through a string of tokens, using a set of separators
94			* argv 9/90
95			*
96			*/
97			#ifndef HAVE_STRTOK_R
98
99			char *
100			strtoken(char** save, char* str, const char* fs)
101			{
102			char* pos = save; / keep last position across calls */
103			char* tmp;
104
105			if (str)
106			pos = str; /* new string scan */
107
108			while (pos && pos && strchr(fs, pos) != NULL)
109			++pos; /* skip leading separators */
110
111			if (!pos \|\| !*pos)
112			return (pos = save = NULL); / string contains only sep's */
113
114			tmp = pos; /* now, keep position of the token */
115
116			while (pos && strchr(fs, pos) == NULL)
117			++pos; /* skip content of the token */
118
119			if (*pos)
120			pos++ = '\0'; / remove first sep after the token */
121			else
122			pos = NULL; /* end of string */
123
124			*save = pos;
125			return tmp;
126			}
127			#endif /* !HAVE_STRTOK_R */
128
129	michael	978	/* libio_basename()
130	adx	30	*
131			* input - i.e. "/usr/local/ircd/modules/m_whois.so"
132			* output - i.e. "m_whois.so"
133			* side effects - this will be overwritten on subsequent calls
134			*/
135	michael	978	const char *
136			libio_basename(const char *path)
137	adx	30	{
138	michael	978	const char *s;
139	adx	30
140			if ((s = strrchr(path, '/')) == NULL)
141			s = path;
142			else
143			s++;
144
145			return s;
146			}
147
148			/*
149			* strlcat and strlcpy were ripped from openssh 2.5.1p2
150			* They had the following Copyright info:
151			*
152			*
153			* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
154			* All rights reserved.
155			*
156			* Redistribution and use in source and binary forms, with or without
157			* modification, are permitted provided that the following conditions
158			* are met:
159			* 1. Redistributions of source code must retain the above copyright
160			* notice, this list of conditions and the following disclaimer.
161			* 2. Redistributions in binary form must reproduce the above copyright
162			* notice, this list of conditions and the following disclaimer in the
163			* documentation and/or other materials provided with the distribution.
164			* 3. The name of the author may not be used to endorse or promote products
165			* derived from this software without specific prior written permission.
166			*
167			* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
168			* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
169			* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
170			* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
171			* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
172			* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
173			* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
174			* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
175			* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
176			* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
177			*/
178
179			#ifndef HAVE_STRLCAT
180			size_t
181			strlcat(char dst, const char src, size_t siz)
182			{
183			char *d = dst;
184			const char *s = src;
185			size_t n = siz, dlen;
186
187			while (n-- != 0 && *d != '\0')
188			d++;
189
190			dlen = d - dst;
191			n = siz - dlen;
192
193			if (n == 0)
194	michael	1122	return dlen + strlen(s);
195	adx	30
196			while (*s != '\0')
197			{
198			if (n != 1)
199			{
200			d++ = s;
201			n--;
202			}
203
204			s++;
205			}
206
207			*d = '\0';
208			return dlen + (s - src); /* count does not include NUL */
209			}
210			#endif
211
212			#ifndef HAVE_STRLCPY
213			size_t
214			strlcpy(char dst, const char src, size_t siz)
215			{
216			char *d = dst;
217			const char *s = src;
218			size_t n = siz;
219
220			/* Copy as many bytes as will fit */
221			if (n != 0 && --n != 0)
222			{
223			do
224			{
225			if ((d++ = s++) == 0)
226			break;
227			} while (--n != 0);
228			}
229
230			/* Not enough room in dst, add NUL and traverse rest of src */
231			if (n == 0)
232			{
233			if (siz != 0)
234			d = '\0'; / NUL-terminate dst */
235			while (*s++)
236			;
237			}
238
239			return s - src - 1; /* count does not include NUL */
240			}
241			#endif
242
243	michael	1009	#ifdef HAVE_LIBPCRE
244			void *
245	adx	30	ircd_pcre_compile(const char pattern, const char *errptr)
246			{
247			int erroroffset = 0;
248			int options = PCRE_EXTRA;
249
250			assert(pattern);
251
252			return pcre_compile(pattern, options, errptr, &erroroffset, NULL);
253			}
254
255			int
256	michael	1009	ircd_pcre_exec(const void code, const char subject)
257	adx	30	{
258			assert(code && subject);
259
260			return pcre_exec(code, NULL, subject, strlen(subject), 0, 0, NULL, 0) < 0;
261			}
262	michael	1009	#endif