Annotation of mandoc/compat.c, Revision 1.5
1.1 kristaps 1: /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
2:
3: /*
4: * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
1.5 ! kristaps 18: #ifdef HAVE_CONFIG_H
! 19: #include "config.h"
! 20: #endif
1.1 kristaps 21:
22: #include <sys/types.h>
23: #include <string.h>
24:
1.5 ! kristaps 25: int dummy; /* To prevent an empty object file */
1.1 kristaps 26:
1.5 ! kristaps 27: #ifndef HAVE_STRLCAT
1.1 kristaps 28: /*
29: * Appends src to string dst of size siz (unlike strncat, siz is the
30: * full size of dst, not space left). At most siz-1 characters
31: * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
32: * Returns strlen(src) + MIN(siz, strlen(initial dst)).
33: * If retval >= siz, truncation occurred.
34: */
35: size_t
36: strlcat(char *dst, const char *src, size_t siz)
37: {
38: char *d = dst;
39: const char *s = src;
40: size_t n = siz;
41: size_t dlen;
42:
43: /* Find the end of dst and adjust bytes left but don't go past end */
44: while (n-- != 0 && *d != '\0')
45: d++;
46: dlen = d - dst;
47: n = siz - dlen;
48:
49: if (n == 0)
50: return(dlen + strlen(s));
51: while (*s != '\0') {
52: if (n != 1) {
53: *d++ = *s;
54: n--;
55: }
56: s++;
57: }
58: *d = '\0';
59:
60: return(dlen + (s - src)); /* count does not include NUL */
61: }
1.5 ! kristaps 62: #endif
1.1 kristaps 63:
1.5 ! kristaps 64: #ifndef HAVE_STRLCPY
1.1 kristaps 65: /*
66: * Copy src to string dst of size siz. At most siz-1 characters
67: * will be copied. Always NUL terminates (unless siz == 0).
68: * Returns strlen(src); if retval >= siz, truncation occurred.
69: */
70: size_t
71: strlcpy(char *dst, const char *src, size_t siz)
72: {
73: char *d = dst;
74: const char *s = src;
75: size_t n = siz;
76:
77: /* Copy as many bytes as will fit */
78: if (n != 0) {
79: while (--n != 0) {
80: if ((*d++ = *s++) == '\0')
81: break;
82: }
83: }
84:
85: /* Not enough room in dst, add NUL and traverse rest of src */
86: if (n == 0) {
87: if (siz != 0)
88: *d = '\0'; /* NUL-terminate dst */
89: while (*s++)
90: ;
91: }
92:
93: return(s - src - 1); /* count does not include NUL */
94: }
1.4 kristaps 95: #endif
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