crypto/external/bsd/heimdal/dist/lib/roken/strpool.c

   1 /*      $NetBSD: strpool.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $    */
   2
   3 /*
   4  * Copyright (c) 2005 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <config.h>
  37
  38 #include <stdarg.h>
  39 #include <stdlib.h>
  40 #include <krb5/roken.h>
  41
  42 struct rk_strpool {
  43     char *str;
  44     size_t len;
  45 };
  46
  47 /*
  48  *
  49  */
  50
  51 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
  52 rk_strpoolfree(struct rk_strpool *p)
  53 {
  54     if (p->str) {
  55         free(p->str);
  56         p->str = NULL;
  57     }
  58     free(p);
  59 }
  60
  61 /*
  62  *
  63  */
  64
  65 ROKEN_LIB_FUNCTION struct rk_strpool * ROKEN_LIB_CALL
  66 rk_strpoolprintf(struct rk_strpool *p, const char *fmt, ...)
  67 {
  68     va_list ap;
  69     char *str, *str2;
  70     int len;
  71
  72     if (p == NULL) {
  73         p = malloc(sizeof(*p));
  74         if (p == NULL)
  75             return NULL;
  76         p->str = NULL;
  77         p->len = 0;
  78     }
  79     va_start(ap, fmt);
  80     len = vasprintf(&str, fmt, ap);
  81     va_end(ap);
  82     if (str == NULL) {
  83         rk_strpoolfree(p);
  84         return NULL;
  85     }
  86     str2 = realloc(p->str, len + p->len + 1);
  87     if (str2 == NULL) {
  88         rk_strpoolfree(p);
  89         return NULL;
  90     }
  91     p->str = str2;
  92     memcpy(p->str + p->len, str, len + 1);
  93     p->len += len;
  94     free(str);
  95     return p;
  96 }
  97
  98 /*
  99  *
 100  */
 101
 102 ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
 103 rk_strpoolcollect(struct rk_strpool *p)
 104 {
 105     char *str;
 106     if (p == NULL)
 107         return strdup("");
 108     str = p->str;
 109     p->str = NULL;
 110     free(p);
 111     return str;
 112 }