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Annotation of mandoc/xstd.c, Revision 1.2

1.2     ! kristaps    1: /* $Id: xstd.c,v 1.1 2008/12/23 05:30:49 kristaps Exp $ */
1.1       kristaps    2: /*
                      3:  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
                      4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the
                      7:  * above copyright notice and this permission notice appear in all
                      8:  * copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
                     11:  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
                     12:  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
                     13:  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
                     14:  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
                     15:  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
                     16:  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
                     17:  * PERFORMANCE OF THIS SOFTWARE.
                     18:  */
                     19: #include <err.h>
                     20: #include <stdlib.h>
                     21: #include <string.h>
                     22:
                     23: #include "private.h"
                     24:
1.2     ! kristaps   25: #ifdef __linux__
        !            26: extern size_t           strlcat(char *, const char *, size_t);
        !            27: extern size_t           strlcpy(char *, const char *, size_t);
        !            28: #endif
        !            29:
1.1       kristaps   30:
                     31: int
                     32: xstrcmp(const char *p1, const char *p2)
                     33: {
                     34:
                     35:        return(0 == strcmp(p1, p2));
                     36: }
                     37:
                     38:
                     39: int
                     40: xstrlcat(char *dst, const char *src, size_t sz)
                     41: {
                     42:
                     43:        return(strlcat(dst, src, sz) < sz);
                     44: }
                     45:
                     46:
                     47: int
                     48: xstrlcpy(char *dst, const char *src, size_t sz)
                     49: {
                     50:
                     51:        return(strlcpy(dst, src, sz) < sz);
                     52: }
                     53:
                     54:
                     55:
                     56: void *
                     57: xcalloc(size_t num, size_t sz)
                     58: {
                     59:        void            *p;
                     60:
                     61:        if (NULL == (p = calloc(num, sz)))
                     62:                err(EXIT_FAILURE, "calloc");
                     63:        return(p);
                     64: }
                     65:
                     66:
                     67: char *
                     68: xstrdup(const char *p)
                     69: {
                     70:        char            *pp;
                     71:
                     72:        if (NULL == (pp = strdup(p)))
                     73:                err(EXIT_FAILURE, "strdup");
                     74:        return(pp);
                     75: }
                     76:
1.2     ! kristaps   77:
        !            78: #ifdef __linux__
        !            79: /*     $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $      */
        !            80:
        !            81: /*
        !            82:  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
        !            83:  *
        !            84:  * Permission to use, copy, modify, and distribute this software for any
        !            85:  * purpose with or without fee is hereby granted, provided that the above
        !            86:  * copyright notice and this permission notice appear in all copies.
        !            87:  *
        !            88:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            89:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            90:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            91:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            92:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            93:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            94:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            95:  */
        !            96:
        !            97: #include <sys/types.h>
        !            98: #include <string.h>
        !            99:
        !           100:
        !           101: size_t
        !           102: strlcat(char *dst, const char *src, size_t siz)
        !           103: {
        !           104:        char *d = dst;
        !           105:        const char *s = src;
        !           106:        size_t n = siz;
        !           107:        size_t dlen;
        !           108:
        !           109:        /* Find the end of dst and adjust bytes left but don't go past end */
        !           110:        while (n-- != 0 && *d != '\0')
        !           111:                d++;
        !           112:        dlen = d - dst;
        !           113:        n = siz - dlen;
        !           114:
        !           115:        if (n == 0)
        !           116:                return(dlen + strlen(s));
        !           117:        while (*s != '\0') {
        !           118:                if (n != 1) {
        !           119:                        *d++ = *s;
        !           120:                        n--;
        !           121:                }
        !           122:                s++;
        !           123:        }
        !           124:        *d = '\0';
        !           125:
        !           126:        return(dlen + (s - src));       /* count does not include NUL */
        !           127: }
        !           128:
        !           129:
        !           130: size_t
        !           131: strlcpy(char *dst, const char *src, size_t siz)
        !           132: {
        !           133:        char *d = dst;
        !           134:        const char *s = src;
        !           135:        size_t n = siz;
        !           136:
        !           137:        /* Copy as many bytes as will fit */
        !           138:        if (n != 0) {
        !           139:                while (--n != 0) {
        !           140:                        if ((*d++ = *s++) == '\0')
        !           141:                                break;
        !           142:                }
        !           143:        }
        !           144:
        !           145:        /* Not enough room in dst, add NUL and traverse rest of src */
        !           146:        if (n == 0) {
        !           147:                if (siz != 0)
        !           148:                        *d = '\0';              /* NUL-terminate dst */
        !           149:                while (*s++)
        !           150:                        ;
        !           151:        }
        !           152:
        !           153:        return(s - src - 1);    /* count does not include NUL */
        !           154: }
        !           155: #endif