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