Annotation of mandoc/compat.c, Revision 1.1
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:
! 22: #ifdef __linux__
! 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: /*
! 61: * Copy src to string dst of size siz. At most siz-1 characters
! 62: * will be copied. Always NUL terminates (unless siz == 0).
! 63: * Returns strlen(src); if retval >= siz, truncation occurred.
! 64: */
! 65: size_t
! 66: strlcpy(char *dst, const char *src, size_t siz)
! 67: {
! 68: char *d = dst;
! 69: const char *s = src;
! 70: size_t n = siz;
! 71:
! 72: /* Copy as many bytes as will fit */
! 73: if (n != 0) {
! 74: while (--n != 0) {
! 75: if ((*d++ = *s++) == '\0')
! 76: break;
! 77: }
! 78: }
! 79:
! 80: /* Not enough room in dst, add NUL and traverse rest of src */
! 81: if (n == 0) {
! 82: if (siz != 0)
! 83: *d = '\0'; /* NUL-terminate dst */
! 84: while (*s++)
! 85: ;
! 86: }
! 87:
! 88: return(s - src - 1); /* count does not include NUL */
! 89: }
! 90: #endif /*__linux__*/
CVSweb