Annotation of mandoc/compat.c, Revision 1.4
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: */
18:
19: #include <sys/types.h>
20: #include <string.h>
21:
1.4 ! kristaps 22: #ifdef __linux__
1.1 kristaps 23:
24: /*
25: * Appends src to string dst of size siz (unlike strncat, siz is the
26: * full size of dst, not space left). At most siz-1 characters
27: * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
28: * Returns strlen(src) + MIN(siz, strlen(initial dst)).
29: * If retval >= siz, truncation occurred.
30: */
31: size_t
32: strlcat(char *dst, const char *src, size_t siz)
33: {
34: char *d = dst;
35: const char *s = src;
36: size_t n = siz;
37: size_t dlen;
38:
39: /* Find the end of dst and adjust bytes left but don't go past end */
40: while (n-- != 0 && *d != '\0')
41: d++;
42: dlen = d - dst;
43: n = siz - dlen;
44:
45: if (n == 0)
46: return(dlen + strlen(s));
47: while (*s != '\0') {
48: if (n != 1) {
49: *d++ = *s;
50: n--;
51: }
52: s++;
53: }
54: *d = '\0';
55:
56: return(dlen + (s - src)); /* count does not include NUL */
57: }
58:
59: /*
60: * Copy src to string dst of size siz. At most siz-1 characters
61: * will be copied. Always NUL terminates (unless siz == 0).
62: * Returns strlen(src); if retval >= siz, truncation occurred.
63: */
64: size_t
65: strlcpy(char *dst, const char *src, size_t siz)
66: {
67: char *d = dst;
68: const char *s = src;
69: size_t n = siz;
70:
71: /* Copy as many bytes as will fit */
72: if (n != 0) {
73: while (--n != 0) {
74: if ((*d++ = *s++) == '\0')
75: break;
76: }
77: }
78:
79: /* Not enough room in dst, add NUL and traverse rest of src */
80: if (n == 0) {
81: if (siz != 0)
82: *d = '\0'; /* NUL-terminate dst */
83: while (*s++)
84: ;
85: }
86:
87: return(s - src - 1); /* count does not include NUL */
88: }
1.2 kristaps 89:
1.4 ! kristaps 90: #endif
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