rxvt-unicode/src/strings.C

/*--------------------------------*-C-*---------------------------------*
 * File:        strings.c
 *----------------------------------------------------------------------*
 * $Id: strings.C,v 1.4 2004/02/01 01:34:41 pcg Exp $
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 1997-2001 Geoff Wing <gcw@pobox.com>
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------*/

#include "../config.h"          /* NECESSARY */
#include "rxvt.h"               /* NECESSARY */
#include "strings.intpro"       /* PROTOS for internal routines */

#ifndef NO_STRINGS
/*----------------------------------------------------------------------*/
/*
 * a replacement for strcasecmp () to avoid linking an entire library.
 * Mark Olesen added this in 2.15 but for which OS & library? - Geoff Wing
 */
int
strcasecmp (const char *s1, const char *s2)
{
  for ( ; tolower (*s1) == tolower (*s2); s1++, s2++)
    if (!*s1)
      return 0;
  return (int) (tolower (*s1) - tolower (*s2));
}

int
strncasecmp (const char *s1, const char *s2, size_t n)
{
  for ( ; n-- && (tolower (*s1) == tolower (*s2)); s1++, s2++)
    if (!*s1)
      return 0;
  if (n == 0)
    return 0;
  return (int) (tolower (*s1) - tolower (*s2));
}

char           *
strcpy (char *d, const char *s)
{
  char          *r = d;

  for ( ; (*r++ = *s++) != '\0'; ) ;
  return d;
}

char           *
strncpy (char *d, const char *s, size_t len)
{
  char          *r = d;

  if (len)
    for ( ; len; len--)
      if ((*r++ = *s++) == '\0')
        {
          for ( ; --len; )
            *r++ = '\0';
          break;
        }
  return d;
}

int
strcmp (const char *s1, const char *s2)
{
  for ( ; (*s1 == *s2++); )
    if (*s1++ == '\0')
      return 0;
  return (int) ((unsigned char) *s1 - (unsigned char) *--s2);
}

int
strncmp (const char *s1, const char *s2, size_t len)
{
  if (len)
    {
      for ( ; len-- && (*s1++ == *s2++); ) ;
      if (++len)
        return (int) ((unsigned char) *--s1 - (unsigned char) *--s2);
    }
  return 0;
}

char           *
strcat (char *s1, const char *s2)
{
  char           *r = s1;

  if (*r != '\0')
    for ( ; *++r != '\0'; ) ;
  for ( ; (*r++ = *s2++) != '\0'; ) ;

  return s1;
}

char           *
strncat (char *s1, const char *s2, size_t len)
{
  char           *r = s1;

  if (*r != '\0')
    for ( ; *++r != '\0'; ) ;
  for ( ; len-- && ((*r++ = *s2++) != '\0'); ) ;
  *r = '\0';

  return s1;
}

size_t
strlen (const char *s)
{
  size_t         len = 0;

  for ( ; *s++ != '\0'; len++) ;
  return len;
}

char           *
strdup (const char *s)
{
  size_t         len = STRLEN (s) + 1;
  char          *c;

  if ((c = malloc (len)) != NULL)
    MEMCPY (c, s, len);
  return c;
}

char           *
index (const char *s, int c)
{
  return STRCHR (s, c);
}

char           *
strchr (const char *s, int c)
{
  char          *p = NULL;

  for (;;)
    {
      if (*s == (char)c)
        {
          p = (char *)s;
          break;
        }
      if (*s++ == '\0')
        break;
    }
  return p;

}

char           *
rindex (const char *s, int c)
{
  return STRRCHR (s, c);
}

char           *
strrchr (const char *s, int c)
{
  char          *p = NULL;

  for (;;)
    {
      if (*s == (char)c)
        p = (char *)s;
      if (*s++ == '\0')
        break;
    }
  return p;
}

void           *
memcpy (void *s1, const void *s2, size_t len)
{
  /* has extra stack and time but less code space */
  return MEMMOVE (s1, s2, len);
}

/*--------------------------------------------------------------------------*
 * Possibly faster memmove () by Geoff Wing <mason@primenet.com.au>
 *--------------------------------------------------------------------------*/
void           *
memmove (void *d, const void *s, size_t len)
{
  u_intp_t        i;
  unsigned char  *dst = (unsigned char *)d;
  const unsigned char *src = (const unsigned char *)s;

  if (len && d != s)
    {
      if ((u_intp_t)d < (u_intp_t)s)
        {
          /* forwards */
          i = (- (u_intp_t)dst) & (SIZEOF_INT_P - 1);
          if (len >= 16 && i == ((- (u_intp_t)src) & (SIZEOF_INT_P - 1)))
            {
              /* speed up since src & dst are offset correctly */
              len -= (size_t)i;
              for ( ; i--; )
                *dst++ = *src++;
              for (i = (u_intp_t) (len / SIZEOF_INT_P); i--; )
                * ((u_intp_t *)dst)++ = * ((const u_intp_t *)src)++;
              len &= (SIZEOF_INT_P - 1);
            }
          for ( ; len--; )
            *dst++ = *src++;
        }
      else
        {
          /* backwards */
          dst += len;
          src += len;
          i = ((u_intp_t)dst) & (SIZEOF_INT_P - 1);
          if (len >= 16 && i == (((u_intp_t)src) & (SIZEOF_INT_P - 1)))
            {
              /* speed up since src & dst are offset correctly */
              len -= (size_t)i;
              for ( ; i--; )
                *--dst = *--src;
              for (i = (u_intp_t) (len / SIZEOF_INT_P); i--; )
                *-- ((u_intp_t *)dst) = *-- ((const u_intp_t *)src);
              len &= (SIZEOF_INT_P - 1);
            }
          for ( ; len--; )
            *--dst = *--src;
        }
    }
  return d;
}

/*--------------------------------------------------------------------------*
 * Possibly faster memset () by Geoff Wing <mason@primenet.com.au>
 * presumptions:
 *   1) intp_t write the best
 *   2) SIZEOF_INT_P == power of 2
 *--------------------------------------------------------------------------*/

void
bzero (void *b, size_t len)
{
  MEMSET (b, 0, len);
}

void           *
memset (void *p, int c1, size_t len)
{
  u_intp_t        i, val;
  unsigned char   c = (unsigned char) c1;
  unsigned char  *lp = (unsigned char *) p;

  if (len)
    {
      if (len >= 16)
        { /* < 16 probably not worth all the calculations */
          /* write out preceding characters so we align on an integer boundary */
          if ((i = ((- (u_intp_t)p) & (SIZEOF_INT_P - 1))))
            {
              len -= (size_t)i;
              for (; i--;)
                *lp++ = c;
            }

          /* do the fast writing */
          val = (c << 8) + c;
#if SIZEOF_INT_P >= 4
          val |= (val << 16);
#endif
#if SIZEOF_INT_P >= 8
          val |= (val << 32);
#endif
#if SIZEOF_INT_P == 16
          val |= (val << 64);
#endif
          for (i = (u_intp_t) (len / SIZEOF_INT_P); i--;)
            * ((u_intp_t *)lp)++ = val;
          len &= (SIZEOF_INT_P - 1);
        }
      /* write trailing characters */
      for (; len--;)
        *lp++ = c;
    }
  return p;
}
#endif
/*----------------------- end-of-file (C source) -----------------------*/
Revision:	1.5
Committed:	Fri Feb 13 12:16:21 2004 UTC (22 years, 8 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_1_0, rel-2_4, rel-2_5, rel-2_2, rel-2_3, rel-2_0, rel-1-9, rxvt-2-0, rel-1_9, rel-2_7
Changes since 1.4:	+42 -42 lines
Log Message:	* empty log message *
#	Content
1	/---------------------------------C----------------------------------
2	* File: strings.c
3	----------------------------------------------------------------------
4	* $Id: strings.C,v 1.4 2004/02/01 01:34:41 pcg Exp $
5	*
6	* All portions of code are copyright by their respective author/s.
7	* Copyright (c) 1997-2001 Geoff Wing <gcw@pobox.com>
8	*
9	* This program is free software; you can redistribute it and/or modify
10	* it under the terms of the GNU General Public License as published by
11	* the Free Software Foundation; either version 2 of the License, or
12	* (at your option) any later version.
13	*
14	* This program is distributed in the hope that it will be useful,
15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17	* GNU General Public License for more details.
18	*
19	* You should have received a copy of the GNU General Public License
20	* along with this program; if not, write to the Free Software
21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22	----------------------------------------------------------------------/
23
24	#include "../config.h" /* NECESSARY */
25	#include "rxvt.h" /* NECESSARY */
26	#include "strings.intpro" /* PROTOS for internal routines */
27
28	#ifndef NO_STRINGS
29	/----------------------------------------------------------------------/
30	/*
31	* a replacement for strcasecmp () to avoid linking an entire library.
32	* Mark Olesen added this in 2.15 but for which OS & library? - Geoff Wing
33	*/
34	int
35	strcasecmp (const char s1, const char s2)
36	{
37	for ( ; tolower (s1) == tolower (s2); s1++, s2++)
38	if (!*s1)
39	return 0;
40	return (int) (tolower (s1) - tolower (s2));
41	}
42
43	int
44	strncasecmp (const char s1, const char s2, size_t n)
45	{
46	for ( ; n-- && (tolower (s1) == tolower (s2)); s1++, s2++)
47	if (!*s1)
48	return 0;
49	if (n == 0)
50	return 0;
51	return (int) (tolower (s1) - tolower (s2));
52	}
53
54	char *
55	strcpy (char d, const char s)
56	{
57	char *r = d;
58
59	for ( ; (r++ = s++) != '\0'; ) ;
60	return d;
61	}
62
63	char *
64	strncpy (char d, const char s, size_t len)
65	{
66	char *r = d;
67
68	if (len)
69	for ( ; len; len--)
70	if ((r++ = s++) == '\0')
71	{
72	for ( ; --len; )
73	*r++ = '\0';
74	break;
75	}
76	return d;
77	}
78
79	int
80	strcmp (const char s1, const char s2)
81	{
82	for ( ; (s1 == s2++); )
83	if (*s1++ == '\0')
84	return 0;
85	return (int) ((unsigned char) s1 - (unsigned char) --s2);
86	}
87
88	int
89	strncmp (const char s1, const char s2, size_t len)
90	{
91	if (len)
92	{
93	for ( ; len-- && (s1++ == s2++); ) ;
94	if (++len)
95	return (int) ((unsigned char) --s1 - (unsigned char) --s2);
96	}
97	return 0;
98	}
99
100	char *
101	strcat (char s1, const char s2)
102	{
103	char *r = s1;
104
105	if (*r != '\0')
106	for ( ; *++r != '\0'; ) ;
107	for ( ; (r++ = s2++) != '\0'; ) ;
108
109	return s1;
110	}
111
112	char *
113	strncat (char s1, const char s2, size_t len)
114	{
115	char *r = s1;
116
117	if (*r != '\0')
118	for ( ; *++r != '\0'; ) ;
119	for ( ; len-- && ((r++ = s2++) != '\0'); ) ;
120	*r = '\0';
121
122	return s1;
123	}
124
125	size_t
126	strlen (const char *s)
127	{
128	size_t len = 0;
129
130	for ( ; *s++ != '\0'; len++) ;
131	return len;
132	}
133
134	char *
135	strdup (const char *s)
136	{
137	size_t len = STRLEN (s) + 1;
138	char *c;
139
140	if ((c = malloc (len)) != NULL)
141	MEMCPY (c, s, len);
142	return c;
143	}
144
145	char *
146	index (const char *s, int c)
147	{
148	return STRCHR (s, c);
149	}
150
151	char *
152	strchr (const char *s, int c)
153	{
154	char *p = NULL;
155
156	for (;;)
157	{
158	if (*s == (char)c)
159	{
160	p = (char *)s;
161	break;
162	}
163	if (*s++ == '\0')
164	break;
165	}
166	return p;
167
168	}
169
170	char *
171	rindex (const char *s, int c)
172	{
173	return STRRCHR (s, c);
174	}
175
176	char *
177	strrchr (const char *s, int c)
178	{
179	char *p = NULL;
180
181	for (;;)
182	{
183	if (*s == (char)c)
184	p = (char *)s;
185	if (*s++ == '\0')
186	break;
187	}
188	return p;
189	}
190
191	void *
192	memcpy (void s1, const void s2, size_t len)
193	{
194	/* has extra stack and time but less code space */
195	return MEMMOVE (s1, s2, len);
196	}
197
198	/--------------------------------------------------------------------------
199	* Possibly faster memmove () by Geoff Wing <mason@primenet.com.au>
200	--------------------------------------------------------------------------/
201	void *
202	memmove (void d, const void s, size_t len)
203	{
204	u_intp_t i;
205	unsigned char dst = (unsigned char )d;
206	const unsigned char src = (const unsigned char )s;
207
208	if (len && d != s)
209	{
210	if ((u_intp_t)d < (u_intp_t)s)
211	{
212	/* forwards */
213	i = (- (u_intp_t)dst) & (SIZEOF_INT_P - 1);
214	if (len >= 16 && i == ((- (u_intp_t)src) & (SIZEOF_INT_P - 1)))
215	{
216	/* speed up since src & dst are offset correctly */
217	len -= (size_t)i;
218	for ( ; i--; )
219	dst++ = src++;
220	for (i = (u_intp_t) (len / SIZEOF_INT_P); i--; )
221	* ((u_intp_t )dst)++ = ((const u_intp_t *)src)++;
222	len &= (SIZEOF_INT_P - 1);
223	}
224	for ( ; len--; )
225	dst++ = src++;
226	}
227	else
228	{
229	/* backwards */
230	dst += len;
231	src += len;
232	i = ((u_intp_t)dst) & (SIZEOF_INT_P - 1);
233	if (len >= 16 && i == (((u_intp_t)src) & (SIZEOF_INT_P - 1)))
234	{
235	/* speed up since src & dst are offset correctly */
236	len -= (size_t)i;
237	for ( ; i--; )
238	--dst = --src;
239	for (i = (u_intp_t) (len / SIZEOF_INT_P); i--; )
240	-- ((u_intp_t )dst) = -- ((const u_intp_t )src);
241	len &= (SIZEOF_INT_P - 1);
242	}
243	for ( ; len--; )
244	--dst = --src;
245	}
246	}
247	return d;
248	}
249
250	/--------------------------------------------------------------------------
251	* Possibly faster memset () by Geoff Wing <mason@primenet.com.au>
252	* presumptions:
253	* 1) intp_t write the best
254	* 2) SIZEOF_INT_P == power of 2
255	--------------------------------------------------------------------------/
256
257	void
258	bzero (void *b, size_t len)
259	{
260	MEMSET (b, 0, len);
261	}
262
263	void *
264	memset (void *p, int c1, size_t len)
265	{
266	u_intp_t i, val;
267	unsigned char c = (unsigned char) c1;
268	unsigned char lp = (unsigned char ) p;
269
270	if (len)
271	{
272	if (len >= 16)
273	{ /* < 16 probably not worth all the calculations */
274	/* write out preceding characters so we align on an integer boundary */
275	if ((i = ((- (u_intp_t)p) & (SIZEOF_INT_P - 1))))
276	{
277	len -= (size_t)i;
278	for (; i--;)
279	*lp++ = c;
280	}
281
282	/* do the fast writing */
283	val = (c << 8) + c;
284	#if SIZEOF_INT_P >= 4
285	val \|= (val << 16);
286	#endif
287	#if SIZEOF_INT_P >= 8
288	val \|= (val << 32);
289	#endif
290	#if SIZEOF_INT_P == 16
291	val \|= (val << 64);
292	#endif
293	for (i = (u_intp_t) (len / SIZEOF_INT_P); i--;)
294	* ((u_intp_t *)lp)++ = val;
295	len &= (SIZEOF_INT_P - 1);
296	}
297	/* write trailing characters */
298	for (; len--;)
299	*lp++ = c;
300	}
301	return p;
302	}
303	#endif
304	/----------------------- end-of-file (C source) -----------------------/