1 /* 2 * Copyright (c) 1998, 1999 Kungliga Tekniska H�gskolan 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 #ifdef HAVE_CONFIG_H 35 #include <config.h> 36 RCSID("$Id: strcollect.c,v 1.1 2000/01/09 10:57:43 assar Exp $"); 37 #endif 38 39 #include <stdarg.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <errno.h> 43 #include <roken.h> 44 45 enum { initial = 10, increment = 5 }; 46 47 static char ** 48 sub (char **argv, int i, int argc, va_list *ap) 49 { 50 do { 51 if(i == argc) { 52 /* realloc argv */ 53 char **tmp = realloc(argv, (argc + increment) * sizeof(*argv)); 54 if(tmp == NULL) { 55 free(argv); 56 errno = ENOMEM; 57 return NULL; 58 } 59 argv = tmp; 60 argc += increment; 61 } 62 argv[i++] = va_arg(*ap, char*); 63 } while(argv[i - 1] != NULL); 64 return argv; 65 } 66 67 /* 68 * return a malloced vector of pointers to the strings in `ap' 69 * terminated by NULL. 70 */ 71 72 char ** 73 vstrcollect(va_list *ap) 74 { 75 return sub (NULL, 0, 0, ap); 76 } 77 78 /* 79 * 80 */ 81 82 char ** 83 strcollect(char *first, ...) 84 { 85 va_list ap; 86 char **ret = malloc (initial * sizeof(char *)); 87 88 if (ret == NULL) 89 return ret; 90 91 ret[0] = first; 92 va_start(ap, first); 93 ret = sub (ret, 1, initial, &ap); 94 va_end(ap); 95 return ret; 96 } 97