Merge remote branch 'refs/remotes/svn/trunk' into svn
[bitcoinplatinum.git] / strlcpy.h
blobdc0560b30a246d5fdc352818f5b6544c3921fd44
1 /*
2 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 * Copy src to string dst of size siz. At most siz-1 characters
19 * will be copied. Always NUL terminates (unless siz == 0).
20 * Returns strlen(src); if retval >= siz, truncation occurred.
22 inline size_t strlcpy(char *dst, const char *src, size_t siz)
24 char *d = dst;
25 const char *s = src;
26 size_t n = siz;
28 /* Copy as many bytes as will fit */
29 if (n != 0)
31 while (--n != 0)
33 if ((*d++ = *s++) == '\0')
34 break;
38 /* Not enough room in dst, add NUL and traverse rest of src */
39 if (n == 0)
41 if (siz != 0)
42 *d = '\0'; /* NUL-terminate dst */
43 while (*s++)
47 return(s - src - 1); /* count does not include NUL */
51 * Appends src to string dst of size siz (unlike strncat, siz is the
52 * full size of dst, not space left). At most siz-1 characters
53 * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
54 * Returns strlen(src) + MIN(siz, strlen(initial dst)).
55 * If retval >= siz, truncation occurred.
57 inline size_t strlcat(char *dst, const char *src, size_t siz)
59 char *d = dst;
60 const char *s = src;
61 size_t n = siz;
62 size_t dlen;
64 /* Find the end of dst and adjust bytes left but don't go past end */
65 while (n-- != 0 && *d != '\0')
66 d++;
67 dlen = d - dst;
68 n = siz - dlen;
70 if (n == 0)
71 return(dlen + strlen(s));
72 while (*s != '\0')
74 if (n != 1)
76 *d++ = *s;
77 n--;
79 s++;
81 *d = '\0';
83 return(dlen + (s - src)); /* count does not include NUL */