trunk/src/irc_string.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2017 ircd-hybrid development team
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

/*! \file irc_string.c
 * \brief IRC string functions.
 * \version $Id$
 */

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


int
has_wildcards(const char *str)
{
  const unsigned char *p = (const unsigned char *)str;

  for (; *p; ++p)
  {
    if (*p == '\\')
    {
      if (*++p == '\0')
        return 0;
    }
    else if (IsMWildChar(*p))
      return 1;
  }

  return 0;
}

const char *
stripws(char *txt)
{
  while (*txt == '\t' || *txt == ' ')
    ++txt;

  char *tmp = txt + strlen(txt) - 1;
  while (tmp >= txt && (*tmp == '\t' || *tmp == ' '))
    --tmp;

  *(tmp + 1) = '\0';

  return txt;
}

/*
 * strtok_r - walk through a string of tokens, using a set of separators
 *   argv 9/90
 *
 */
#ifndef HAVE_STRTOK_R
char *
strtok_r(char *str, const char *fs, char **save)
{
  char *pos = *save;  /* keep last position across calls */
  char *tmp = NULL;

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

  while (pos && *pos && strchr(fs, *pos))
    ++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 */

/** Fill a vector of tokens from a delimited input list.
 * Empty tokens (when \a token occurs at the start or end of \a list,
 * or when \a token occurs adjacent to itself) are ignored.  When
 * \a size tokens have been written to \a vector, the rest of the
 * string is ignored.
 * \param names Input buffer.
 * \param token Delimiter used to split \a list.
 * \param vector Output vector.
 * \param size Maximum number of elements to put in \a vector.
 * \return Number of elements written to \a vector.
 */
unsigned int
token_vector(char *names, char token, char *vector[], unsigned int size)
{
  unsigned int count = 0;
  char *start = names;

  assert(names);
  assert(vector);
  assert(size > 1);

  vector[count++] = start;

  for (char *end = strchr(start, token); end;
             end = strchr(start, token))
  {
    *end++ = '\0';
    start = end;

    if (*start)
    {
      vector[count++] = start;

      if (count < size)
        continue;
    }

    break;
  }

  return count;
}

/* 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;
}

/*    $OpenBSD: strlcat.c,v 1.18 2016/10/16 17:37:39 dtucker Exp $    */
/*    $OpenBSD: strlcpy.c,v 1.15 2016/10/16 17:37:39 dtucker Exp $    */
/*
 * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef HAVE_STRLCAT
/*
 * Appends src to string dst of size dsize (unlike strncat, dsize is the
 * full size of dst, not space left).  At most dsize-1 characters
 * will be copied.  Always NUL terminates (unless dsize <= strlen(dst)).
 * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
 * If retval >= dsize, truncation occurred.
 */
size_t
strlcat(char *dst, const char *src, size_t dsize)
{
  const char *odst = dst;
  const char *osrc = src;
  size_t n = dsize;
  size_t dlen;

  /* Find the end of dst and adjust bytes left but don't go past end. */
  while (n-- != 0 && *dst != '\0')
    dst++;

  dlen = dst - odst;
  n = dsize - dlen;

  if (n-- == 0)
    return dlen + strlen(src);

  while (*src != '\0')
  {
    if (n != 0)
    {
      *dst++ = *src;
      n--;
    }

    src++;
  }

  *dst = '\0';

  return dlen + (src - osrc);  /* count does not include NUL */
}
#endif

#ifndef HAVE_STRLCPY
/*
 * Copy string src to buffer dst of size dsize.  At most dsize-1
 * chars will be copied.  Always NUL terminates (unless dsize == 0).
 * Returns strlen(src); if retval >= dsize, truncation occurred.
 */
size_t
strlcpy(char *dst, const char *src, size_t dsize)
{
  const char *osrc = src;
  size_t nleft = dsize;

  /* Copy as many bytes as will fit. */
  if (nleft != 0)
  {
    while (--nleft != 0)
    {
      if ((*dst++ = *src++) == '\0')
        break;
    }
  }

  /* Not enough room in dst, add NUL and traverse rest of src. */
  if (nleft == 0)
  {
    if (dsize != 0)
      *dst = '\0';  /* NUL-terminate dst */

    while (*src++)
      ;
  }

  return src - osrc - 1;  /* count does not include NUL */
}
#endif
Revision:	8161
Committed:	Sun Apr 9 11:27:54 2017 UTC (9 years, 5 months ago) by michael
Content type:	text/x-csrc
File size:	6240 byte(s)
Error occurred while calculating annotation data.
Log Message:	- irc_string.c: sync strlcpy() and strlcat() with latest versions from openbsd
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2017 ircd-hybrid development team
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	* USA
20	*/
21
22	/*! \file irc_string.c
23	* \brief IRC string functions.
24	* \version $Id$
25	*/
26
27	#include "config.h"
28	#include "stdinc.h"
29	#include "irc_string.h"
30
31
32	int
33	has_wildcards(const char *str)
34	{
35	const unsigned char p = (const unsigned char )str;
36
37	for (; *p; ++p)
38	{
39	if (*p == '\\')
40	{
41	if (*++p == '\0')
42	return 0;
43	}
44	else if (IsMWildChar(*p))
45	return 1;
46	}
47
48	return 0;
49	}
50
51	const char *
52	stripws(char *txt)
53	{
54	while (txt == '\t' \|\| txt == ' ')
55	++txt;
56
57	char *tmp = txt + strlen(txt) - 1;
58	while (tmp >= txt && (tmp == '\t' \|\| tmp == ' '))
59	--tmp;
60
61	*(tmp + 1) = '\0';
62
63	return txt;
64	}
65
66	/*
67	* strtok_r - walk through a string of tokens, using a set of separators
68	* argv 9/90
69	*
70	*/
71	#ifndef HAVE_STRTOK_R
72	char *
73	strtok_r(char str, const char fs, char **save)
74	{
75	char pos = save; /* keep last position across calls */
76	char *tmp = NULL;
77
78	if (str)
79	pos = str; /* new string scan */
80
81	while (pos && pos && strchr(fs, pos))
82	++pos; /* skip leading separators */
83
84	if (!pos \|\| !*pos)
85	return pos = save = NULL; / string contains only sep's */
86
87	tmp = pos; /* now, keep position of the token */
88
89	while (pos && strchr(fs, pos) == NULL)
90	++pos; /* skip content of the token */
91
92	if (*pos)
93	pos++ = '\0'; / remove first sep after the token */
94	else
95	pos = NULL; /* end of string */
96
97	*save = pos;
98	return tmp;
99	}
100	#endif /* !HAVE_STRTOK_R */
101
102	/** Fill a vector of tokens from a delimited input list.
103	* Empty tokens (when \a token occurs at the start or end of \a list,
104	* or when \a token occurs adjacent to itself) are ignored. When
105	* \a size tokens have been written to \a vector, the rest of the
106	* string is ignored.
107	* \param names Input buffer.
108	* \param token Delimiter used to split \a list.
109	* \param vector Output vector.
110	* \param size Maximum number of elements to put in \a vector.
111	* \return Number of elements written to \a vector.
112	*/
113	unsigned int
114	token_vector(char names, char token, char vector[], unsigned int size)
115	{
116	unsigned int count = 0;
117	char *start = names;
118
119	assert(names);
120	assert(vector);
121	assert(size > 1);
122
123	vector[count++] = start;
124
125	for (char *end = strchr(start, token); end;
126	end = strchr(start, token))
127	{
128	*end++ = '\0';
129	start = end;
130
131	if (*start)
132	{
133	vector[count++] = start;
134
135	if (count < size)
136	continue;
137	}
138
139	break;
140	}
141
142	return count;
143	}
144
145	/* libio_basename()
146	*
147	* input - i.e. "/usr/local/ircd/modules/m_whois.so"
148	* output - i.e. "m_whois.so"
149	* side effects - this will be overwritten on subsequent calls
150	*/
151	const char *
152	libio_basename(const char *path)
153	{
154	const char *s;
155
156	if ((s = strrchr(path, '/')) == NULL)
157	s = path;
158	else
159	s++;
160
161	return s;
162	}
163
164	/* $OpenBSD: strlcat.c,v 1.18 2016/10/16 17:37:39 dtucker Exp $ */
165	/* $OpenBSD: strlcpy.c,v 1.15 2016/10/16 17:37:39 dtucker Exp $ */
166	/*
167	* Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
168	*
169	* Permission to use, copy, modify, and distribute this software for any
170	* purpose with or without fee is hereby granted, provided that the above
171	* copyright notice and this permission notice appear in all copies.
172	*
173	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
174	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
175	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
176	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
177	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
178	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
179	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
180	*/
181
182	#ifndef HAVE_STRLCAT
183	/*
184	* Appends src to string dst of size dsize (unlike strncat, dsize is the
185	* full size of dst, not space left). At most dsize-1 characters
186	* will be copied. Always NUL terminates (unless dsize <= strlen(dst)).
187	* Returns strlen(src) + MIN(dsize, strlen(initial dst)).
188	* If retval >= dsize, truncation occurred.
189	*/
190	size_t
191	strlcat(char dst, const char src, size_t dsize)
192	{
193	const char *odst = dst;
194	const char *osrc = src;
195	size_t n = dsize;
196	size_t dlen;
197
198	/* Find the end of dst and adjust bytes left but don't go past end. */
199	while (n-- != 0 && *dst != '\0')
200	dst++;
201
202	dlen = dst - odst;
203	n = dsize - dlen;
204
205	if (n-- == 0)
206	return dlen + strlen(src);
207
208	while (*src != '\0')
209	{
210	if (n != 0)
211	{
212	dst++ = src;
213	n--;
214	}
215
216	src++;
217	}
218
219	*dst = '\0';
220
221	return dlen + (src - osrc); /* count does not include NUL */
222	}
223	#endif
224
225	#ifndef HAVE_STRLCPY
226	/*
227	* Copy string src to buffer dst of size dsize. At most dsize-1
228	* chars will be copied. Always NUL terminates (unless dsize == 0).
229	* Returns strlen(src); if retval >= dsize, truncation occurred.
230	*/
231	size_t
232	strlcpy(char dst, const char src, size_t dsize)
233	{
234	const char *osrc = src;
235	size_t nleft = dsize;
236
237	/* Copy as many bytes as will fit. */
238	if (nleft != 0)
239	{
240	while (--nleft != 0)
241	{
242	if ((dst++ = src++) == '\0')
243	break;
244	}
245	}
246
247	/* Not enough room in dst, add NUL and traverse rest of src. */
248	if (nleft == 0)
249	{
250	if (dsize != 0)
251	dst = '\0'; / NUL-terminate dst */
252
253	while (*src++)
254	;
255	}
256
257	return src - osrc - 1; /* count does not include NUL */
258	}
259	#endif