1 /* $NetBSD: strcollect.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 1999 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 <string.h> 41 #include <errno.h> 42 #include <krb5/roken.h> 43 44 enum { initial = 10, increment = 5 }; 45 46 static char ** 47 sub (char **argv, int i, int argc, va_list *ap) 48 { 49 do { 50 if(i == argc) { 51 /* realloc argv */ 52 char **tmp = realloc(argv, (argc + increment) * sizeof(*argv)); 53 if(tmp == NULL) { 54 free(argv); 55 errno = ENOMEM; 56 return NULL; 57 } 58 argv = tmp; 59 argc += increment; 60 } 61 argv[i++] = va_arg(*ap, char*); 62 } while(argv[i - 1] != NULL); 63 return argv; 64 } 65 66 /* 67 * return a malloced vector of pointers to the strings in `ap' 68 * terminated by NULL. 69 */ 70 71 ROKEN_LIB_FUNCTION char ** ROKEN_LIB_CALL 72 vstrcollect(va_list *ap) 73 { 74 return sub (NULL, 0, 0, ap); 75 } 76 77 /* 78 * 79 */ 80 81 ROKEN_LIB_FUNCTION char ** ROKEN_LIB_CALL 82 strcollect(char *first, ...) 83 { 84 va_list ap; 85 char **ret = malloc (initial * sizeof(char *)); 86 87 if (ret == NULL) 88 return ret; 89 90 ret[0] = first; 91 va_start(ap, first); 92 ret = sub (ret, 1, initial, &ap); 93 va_end(ap); 94 return ret; 95 } 96