release/src/router/flac/src/flac/local_string_utils.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  */
   3
   4 #if HAVE_CONFIG_H
   5 #  include <config.h>
   6 #endif
   7
   8 #include <string.h>
   9
  10 #include "utils.h"
  11 #include "local_string_utils.h"
  12
  13 /*      $OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $
  14  *
  15  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
  16  *
  17  * Permission to use, copy, modify, and distribute this software for any
  18  * purpose with or without fee is hereby granted, provided that the above
  19  * copyright notice and this permission notice appear in all copies.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  22  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  23  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  24  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  25  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  26  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  27  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  28  *
  29  *
  30  * Copy src to string dst of size siz.  At most siz-1 characters
  31  * will be copied.  Always NUL terminates (unless siz == 0).
  32  * Returns strlen(src); if retval >= siz, truncation occurred.
  33  */
  34 size_t
  35 flac__strlcpy(char *dst, const char *src, size_t siz)
  36 {
  37         register char *d = dst;
  38         register const char *s = src;
  39         register size_t n = siz;
  40
  41         /* Copy as many bytes as will fit */
  42         if (n != 0 && --n != 0) {
  43                 do {
  44                         if ((*d++ = *s++) == 0)
  45                                 break;
  46                 } while (--n != 0);
  47         }
  48
  49         /* Not enough room in dst, add NUL and traverse rest of src */
  50         if (n == 0) {
  51                 if (siz != 0)
  52                         *d = '\0';              /* NUL-terminate dst */
  53                 while (*s++)
  54                         ;
  55         }
  56
  57         return(s - src - 1);    /* count does not include NUL */
  58 }
  59
  60 /*      $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $
  61  *
  62  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
  63  *
  64  * Permission to use, copy, modify, and distribute this software for any
  65  * purpose with or without fee is hereby granted, provided that the above
  66  * copyright notice and this permission notice appear in all copies.
  67  *
  68  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  69  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  70  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  71  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  72  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  73  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  74  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  75  *
  76  *
  77  * Appends src to string dst of size siz (unlike strncat, siz is the
  78  * full size of dst, not space left).  At most siz-1 characters
  79  * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
  80  * Returns strlen(src) + MIN(siz, strlen(initial dst)).
  81  * If retval >= siz, truncation occurred.
  82  */
  83 size_t
  84 flac__strlcat(char *dst, const char *src, size_t siz)
  85 {
  86         register char *d = dst;
  87         register const char *s = src;
  88         register size_t n = siz;
  89         size_t dlen;
  90
  91         /* Find the end of dst and adjust bytes left but don't go past end */
  92         while (n-- != 0 && *d != '\0')
  93                 d++;
  94         dlen = d - dst;
  95         n = siz - dlen;
  96
  97         if (n == 0)
  98                 return(dlen + strlen(s));
  99         while (*s != '\0') {
 100                 if (n != 1) {
 101                         *d++ = *s;
 102                         n--;
 103                 }
 104                 s++;
 105         }
 106         *d = '\0';
 107
 108         return(dlen + (s - src));       /* count does not include NUL */
 109 }