1                 : /*
       2                 :  * Copyright (c) 1998, 1999 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 <string.h>
      39                 : #include <errno.h>
      40                 : #include "roken.h"
      41                 : 
      42                 : enum { initial = 10, increment = 5 };
      43                 : 
      44                 : static char **
      45                 : sub (char **argv, int i, int argc, va_list *ap)
      46               0 : {
      47                 :     do {
      48               0 :         if(i == argc) {
      49                 :             /* realloc argv */
      50               0 :             char **tmp = realloc(argv, (argc + increment) * sizeof(*argv));
      51               0 :             if(tmp == NULL) {
      52               0 :                 free(argv);
      53               0 :                 errno = ENOMEM;
      54               0 :                 return NULL;
      55                 :             }
      56               0 :             argv  = tmp;
      57               0 :             argc += increment;
      58                 :         }
      59               0 :         argv[i++] = va_arg(*ap, char*);
      60               0 :     } while(argv[i - 1] != NULL);
      61               0 :     return argv;
      62                 : }
      63                 : 
      64                 : /*
      65                 :  * return a malloced vector of pointers to the strings in `ap'
      66                 :  * terminated by NULL.
      67                 :  */
      68                 : 
      69                 : ROKEN_LIB_FUNCTION char ** ROKEN_LIB_CALL
      70                 : vstrcollect(va_list *ap)
      71               0 : {
      72               0 :     return sub (NULL, 0, 0, ap);
      73                 : }
      74                 : 
      75                 : /*
      76                 :  *
      77                 :  */
      78                 : 
      79                 : ROKEN_LIB_FUNCTION char ** ROKEN_LIB_CALL
      80                 : strcollect(char *first, ...)
      81               0 : {
      82                 :     va_list ap;
      83               0 :     char **ret = malloc (initial * sizeof(char *));
      84                 : 
      85               0 :     if (ret == NULL)
      86               0 :         return ret;
      87                 : 
      88               0 :     ret[0] = first;
      89               0 :     va_start(ap, first);
      90               0 :     ret = sub (ret, 1, initial, &ap);
      91               0 :     va_end(ap);
      92               0 :     return ret;
      93                 : }