trunk/src/irc_string.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2021 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"


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

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

  return false;
}

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;
}

/** 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:	9857
Committed:	Fri Jan 1 04:43:22 2021 UTC (4 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	5431 byte(s)
Log Message:	- Bump copyright years
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2021 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	bool
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 false;
43	}
44	else if (IsMWildChar(*p))
45	return true;
46	}
47
48	return false;
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	/** Fill a vector of tokens from a delimited input list.
67	* Empty tokens (when \a token occurs at the start or end of \a list,
68	* or when \a token occurs adjacent to itself) are ignored. When
69	* \a size tokens have been written to \a vector, the rest of the
70	* string is ignored.
71	* \param names Input buffer.
72	* \param token Delimiter used to split \a list.
73	* \param vector Output vector.
74	* \param size Maximum number of elements to put in \a vector.
75	* \return Number of elements written to \a vector.
76	*/
77	unsigned int
78	token_vector(char names, char token, char vector[], unsigned int size)
79	{
80	unsigned int count = 0;
81	char *start = names;
82
83	assert(names);
84	assert(vector);
85	assert(size > 1);
86
87	vector[count++] = start;
88
89	for (char *end = strchr(start, token); end;
90	end = strchr(start, token))
91	{
92	*end++ = '\0';
93	start = end;
94
95	if (*start)
96	{
97	vector[count++] = start;
98
99	if (count < size)
100	continue;
101	}
102
103	break;
104	}
105
106	return count;
107	}
108
109	/* libio_basename()
110	*
111	* input - i.e. "/usr/local/ircd/modules/m_whois.so"
112	* output - i.e. "m_whois.so"
113	* side effects - this will be overwritten on subsequent calls
114	*/
115	const char *
116	libio_basename(const char *path)
117	{
118	const char *s;
119
120	if ((s = strrchr(path, '/')) == NULL)
121	s = path;
122	else
123	s++;
124
125	return s;
126	}
127
128	/* $OpenBSD: strlcat.c,v 1.18 2016/10/16 17:37:39 dtucker Exp $ */
129	/* $OpenBSD: strlcpy.c,v 1.15 2016/10/16 17:37:39 dtucker Exp $ */
130	/*
131	* Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
132	*
133	* Permission to use, copy, modify, and distribute this software for any
134	* purpose with or without fee is hereby granted, provided that the above
135	* copyright notice and this permission notice appear in all copies.
136	*
137	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
138	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
139	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
140	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
141	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
142	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
143	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
144	*/
145
146	#ifndef HAVE_STRLCAT
147	/*
148	* Appends src to string dst of size dsize (unlike strncat, dsize is the
149	* full size of dst, not space left). At most dsize-1 characters
150	* will be copied. Always NUL terminates (unless dsize <= strlen(dst)).
151	* Returns strlen(src) + MIN(dsize, strlen(initial dst)).
152	* If retval >= dsize, truncation occurred.
153	*/
154	size_t
155	strlcat(char dst, const char src, size_t dsize)
156	{
157	const char *odst = dst;
158	const char *osrc = src;
159	size_t n = dsize;
160	size_t dlen;
161
162	/* Find the end of dst and adjust bytes left but don't go past end. */
163	while (n-- != 0 && *dst != '\0')
164	dst++;
165
166	dlen = dst - odst;
167	n = dsize - dlen;
168
169	if (n-- == 0)
170	return dlen + strlen(src);
171
172	while (*src != '\0')
173	{
174	if (n != 0)
175	{
176	dst++ = src;
177	n--;
178	}
179
180	src++;
181	}
182
183	*dst = '\0';
184
185	return dlen + (src - osrc); /* count does not include NUL */
186	}
187	#endif
188
189	#ifndef HAVE_STRLCPY
190	/*
191	* Copy string src to buffer dst of size dsize. At most dsize-1
192	* chars will be copied. Always NUL terminates (unless dsize == 0).
193	* Returns strlen(src); if retval >= dsize, truncation occurred.
194	*/
195	size_t
196	strlcpy(char dst, const char src, size_t dsize)
197	{
198	const char *osrc = src;
199	size_t nleft = dsize;
200
201	/* Copy as many bytes as will fit. */
202	if (nleft != 0)
203	{
204	while (--nleft != 0)
205	{
206	if ((dst++ = src++) == '\0')
207	break;
208	}
209	}
210
211	/* Not enough room in dst, add NUL and traverse rest of src. */
212	if (nleft == 0)
213	{
214	if (dsize != 0)
215	dst = '\0'; / NUL-terminate dst */
216
217	while (*src++)
218	;
219	}
220
221	return src - osrc - 1; /* count does not include NUL */
222	}
223	#endif