Line data    Source code

       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; /* strlen() of str */
      43             :     size_t sz;  /* Allocated size */
      44             : };
      45             : 
      46             : /*
      47             :  *
      48             :  */
      49             : 
      50             : ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
      51           0 : rk_strpoolfree(struct rk_strpool *p)
      52             : {
      53           0 :     if (p && p->str) {
      54           0 :         free(p->str);
      55           0 :         p->str = NULL;
      56             :     }
      57           0 :     free(p);
      58           0 : }
      59             : 
      60             : /*
      61             :  *
      62             :  */
      63             : 
      64             : ROKEN_LIB_FUNCTION struct rk_strpool * ROKEN_LIB_CALL
      65     1446788 : rk_strpoolprintf(struct rk_strpool *p, const char *fmt, ...)
      66             : {
      67             :     va_list ap;
      68             :     char *str;
      69             :     int len;
      70             : 
      71     1446788 :     va_start(ap, fmt);
      72     1446788 :     len = vasprintf(&str, fmt, ap);
      73     1446788 :     va_end(ap);
      74     1446788 :     if (str == NULL)
      75           0 :         return rk_strpoolfree(p), NULL;
      76             : 
      77     1446788 :     if (p == NULL) {
      78      151502 :         if ((p = malloc(sizeof(*p))) == NULL)
      79           0 :             return free(str), NULL;
      80      151502 :         p->str = str;
      81      151502 :         p->len = p->sz = len;
      82      151502 :         return p;
      83             :     } /* else grow the buffer and append `str', but don't grow too fast */
      84             : 
      85     1295286 :     if (len + p->len + 1 > p->sz) {
      86      418198 :         size_t sz = p->len + len + 9 + (p->sz >> 2);
      87             :         char *str2;
      88             : 
      89      418198 :         if ((str2 = realloc(p->str, sz)) == NULL)
      90           0 :             return rk_strpoolfree(p), NULL;
      91      418198 :         p->str = str2;
      92      418198 :         p->sz = sz;
      93             :     }
      94     1295286 :     memcpy(p->str + p->len, str, len + 1);
      95     1295286 :     p->len += len;
      96     1295286 :     free(str);
      97     1295286 :     return p;
      98             : }
      99             : 
     100             : /*
     101             :  *
     102             :  */
     103             : 
     104             : ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
     105      151502 : rk_strpoolcollect(struct rk_strpool *p)
     106             : {
     107             :     char *str;
     108      151502 :     if (p == NULL)
     109           0 :         return strdup("");
     110      151502 :     str = p->str;
     111      151502 :     p->str = NULL;
     112      151502 :     free(p);
     113      151502 :     return str;
     114             : }