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 { 52 if (p->str) { 53 free(p->str); 54 p->str = NULL; 55 } 56 free(p); 57 } 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 { 66 va_list ap; 67 char *str, *str2; 68 int len; 69 70 if (p == NULL) { 71 p = malloc(sizeof(*p)); 72 if (p == NULL) 73 return NULL; 74 p->str = NULL; 75 p->len = 0; 76 } 77 va_start(ap, fmt); 78 len = vasprintf(&str, fmt, ap); 79 va_end(ap); 80 if (str == NULL) { 81 rk_strpoolfree(p); 82 return NULL; 83 } 84 str2 = realloc(p->str, len + p->len + 1); 85 if (str2 == NULL) { 86 rk_strpoolfree(p); 87 return NULL; 88 } 89 p->str = str2; 90 memcpy(p->str + p->len, str, len + 1); 91 p->len += len; 92 free(str); 93 return p; 94 } 95 96 /* 97 * 98 */ 99 100 ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL 101 rk_strpoolcollect(struct rk_strpool *p) 102 { 103 char *str; 104 if (p == NULL) 105 return strdup(""); 106 str = p->str; 107 p->str = NULL; 108 free(p); 109 return str; 110 } 111