ircd-hybrid-8/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"
#include "sprintf_irc.h"


/*
 * 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;

  strcpy(buf, ctime(&value));

  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:	1156
Committed:	Tue Aug 9 20:29:20 2011 UTC (14 years, 11 months ago) by michael
Content type:	text/x-csrc
File size:	6283 byte(s)
Log Message:	- create ircd-hybrid-8 "branch"
#	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			#include "sprintf_irc.h"
33
34
35			/*
36			* myctime - This is like standard ctime()-function, but it zaps away
37			* the newline from the end of that string. Also, it takes
38			* the time value as parameter, instead of pointer to it.
39			* Note that it is necessary to copy the string to alternate
40			* buffer (who knows how ctime() implements it, maybe it statically
41			* has newline there and never 'refreshes' it -- zapping that
42			* might break things in other places...)
43			*
44			*
45			* Thu Nov 24 18:22:48 1986
46			*/
47			const char *
48			myctime(time_t value)
49			{
50			static char buf[32];
51			char *p;
52
53			strcpy(buf, ctime(&value));
54
55			if ((p = strchr(buf, '\n')) != NULL)
56			*p = '\0';
57			return buf;
58			}
59
60			/*
61			* strip_tabs(dst, src, length)
62			*
63			* Copies src to dst, while converting all \t (tabs) into spaces.
64			*/
65			void
66			strip_tabs(char dest, const char src, size_t len)
67			{
68			char *d = dest;
69
70			/* Sanity check; we don't want anything nasty... */
71			assert(dest != NULL);
72			assert(src != NULL);
73			assert(len > 0);
74
75			for (; --len && *src; ++src)
76			d++ = src == '\t' ? ' ' : *src;
77
78			d = '\0'; / NUL terminate, thanks and goodbye */
79			}
80
81			/*
82			* strtoken - walk through a string of tokens, using a set of separators
83			* argv 9/90
84			*
85			*/
86			#ifndef HAVE_STRTOK_R
87
88			char *
89			strtoken(char** save, char* str, const char* fs)
90			{
91			char* pos = save; / keep last position across calls */
92			char* tmp;
93
94			if (str)
95			pos = str; /* new string scan */
96
97			while (pos && pos && strchr(fs, pos) != NULL)
98			++pos; /* skip leading separators */
99
100			if (!pos \|\| !*pos)
101			return (pos = save = NULL); / string contains only sep's */
102
103			tmp = pos; /* now, keep position of the token */
104
105			while (pos && strchr(fs, pos) == NULL)
106			++pos; /* skip content of the token */
107
108			if (*pos)
109			pos++ = '\0'; / remove first sep after the token */
110			else
111			pos = NULL; /* end of string */
112
113			*save = pos;
114			return tmp;
115			}
116			#endif /* !HAVE_STRTOK_R */
117
118	michael	978	/* libio_basename()
119	adx	30	*
120			* input - i.e. "/usr/local/ircd/modules/m_whois.so"
121			* output - i.e. "m_whois.so"
122			* side effects - this will be overwritten on subsequent calls
123			*/
124	michael	978	const char *
125			libio_basename(const char *path)
126	adx	30	{
127	michael	978	const char *s;
128	adx	30
129			if ((s = strrchr(path, '/')) == NULL)
130			s = path;
131			else
132			s++;
133
134			return s;
135			}
136
137			/*
138			* strlcat and strlcpy were ripped from openssh 2.5.1p2
139			* They had the following Copyright info:
140			*
141			*
142			* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
143			* All rights reserved.
144			*
145			* Redistribution and use in source and binary forms, with or without
146			* modification, are permitted provided that the following conditions
147			* are met:
148			* 1. Redistributions of source code must retain the above copyright
149			* notice, this list of conditions and the following disclaimer.
150			* 2. Redistributions in binary form must reproduce the above copyright
151			* notice, this list of conditions and the following disclaimer in the
152			* documentation and/or other materials provided with the distribution.
153			* 3. The name of the author may not be used to endorse or promote products
154			* derived from this software without specific prior written permission.
155			*
156			* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
157			* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
158			* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
159			* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
160			* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
161			* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
162			* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
163			* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
164			* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
165			* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
166			*/
167
168			#ifndef HAVE_STRLCAT
169			size_t
170			strlcat(char dst, const char src, size_t siz)
171			{
172			char *d = dst;
173			const char *s = src;
174			size_t n = siz, dlen;
175
176			while (n-- != 0 && *d != '\0')
177			d++;
178
179			dlen = d - dst;
180			n = siz - dlen;
181
182			if (n == 0)
183	michael	1122	return dlen + strlen(s);
184	adx	30
185			while (*s != '\0')
186			{
187			if (n != 1)
188			{
189			d++ = s;
190			n--;
191			}
192
193			s++;
194			}
195
196			*d = '\0';
197			return dlen + (s - src); /* count does not include NUL */
198			}
199			#endif
200
201			#ifndef HAVE_STRLCPY
202			size_t
203			strlcpy(char dst, const char src, size_t siz)
204			{
205			char *d = dst;
206			const char *s = src;
207			size_t n = siz;
208
209			/* Copy as many bytes as will fit */
210			if (n != 0 && --n != 0)
211			{
212			do
213			{
214			if ((d++ = s++) == 0)
215			break;
216			} while (--n != 0);
217			}
218
219			/* Not enough room in dst, add NUL and traverse rest of src */
220			if (n == 0)
221			{
222			if (siz != 0)
223			d = '\0'; / NUL-terminate dst */
224			while (*s++)
225			;
226			}
227
228			return s - src - 1; /* count does not include NUL */
229			}
230			#endif
231
232	michael	1009	#ifdef HAVE_LIBPCRE
233			void *
234	adx	30	ircd_pcre_compile(const char pattern, const char *errptr)
235			{
236			int erroroffset = 0;
237			int options = PCRE_EXTRA;
238
239			assert(pattern);
240
241			return pcre_compile(pattern, options, errptr, &erroroffset, NULL);
242			}
243
244			int
245	michael	1009	ircd_pcre_exec(const void code, const char subject)
246	adx	30	{
247			assert(code && subject);
248
249			return pcre_exec(code, NULL, subject, strlen(subject), 0, 0, NULL, 0) < 0;
250			}
251	michael	1009	#endif