xstd.c

   1 /* $Id: xstd.c,v 1.10 2009/03/16 22:19:19 kristaps Exp $ */
   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 <assert.h>
  20 #include <err.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "private.h"
  25
  26 /*
  27  * Contains wrappers for common functions to simplify their general
  28  * usage throughout this codebase.
  29  */
  30
  31 int
  32 xstrcmp(const char *p1, const char *p2)
  33 {
  34
  35         return(0 == strcmp(p1, p2));
  36 }
  37
  38 int
  39 xstrlcat(char *dst, const char *src, size_t sz)
  40 {
  41
  42         return(strlcat(dst, src, sz) < sz);
  43 }
  44
  45 int
  46 xstrlcpy(char *dst, const char *src, size_t sz)
  47 {
  48
  49         return(strlcpy(dst, src, sz) < sz);
  50 }
  51
  52 void *
  53 xrealloc(void *ptr, size_t sz)
  54 {
  55         void            *p;
  56
  57         if (NULL == (p = realloc(ptr, sz)))
  58                 err(EXIT_FAILURE, "realloc");
  59         return(p);
  60 }
  61
  62 void *
  63 xcalloc(size_t num, size_t sz)
  64 {
  65         void            *p;
  66
  67         if (NULL == (p = calloc(num, sz)))
  68                 err(EXIT_FAILURE, "calloc");
  69         return(p);
  70 }
  71
  72 char *
  73 xstrdup(const char *p)
  74 {
  75         char            *pp;
  76
  77         if (NULL == (pp = strdup(p)))
  78                 err(EXIT_FAILURE, "strdup");
  79         return(pp);
  80 }
  81
  82 int
  83 xstrlcpys(char *buf, const struct mdoc_node *n, size_t sz)
  84 {
  85         char             *p;
  86
  87         assert(sz > 0);
  88         assert(buf);
  89         *buf = 0;
  90
  91         for ( ; n; n = n->next) {
  92                 assert(MDOC_TEXT == n->type);
  93                 p = n->string;
  94                 if ( ! xstrlcat(buf, p, sz))
  95                         return(0);
  96                 if (n->next && ! xstrlcat(buf, " ", sz))
  97                         return(0);
  98         }
  99
 100         return(1);
 101 }