1 /* 2 * Copyright (c) 1995, 1996, 1997 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 "roken.h" 37 38 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 39 roken_concat (char *s, size_t len, ...) 40 { 41 int ret; 42 va_list args; 43 44 va_start(args, len); 45 ret = roken_vconcat (s, len, args); 46 va_end(args); 47 return ret; 48 } 49 50 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 51 roken_vconcat (char *s, size_t len, va_list args) 52 { 53 const char *a; 54 55 while ((a = va_arg(args, const char*))) { 56 size_t n = strlen (a); 57 58 if (n >= len) 59 return -1; 60 memcpy (s, a, n); 61 s += n; 62 len -= n; 63 } 64 *s = '\0'; 65 return 0; 66 } 67 68 ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL 69 roken_vmconcat (char **s, size_t max_len, va_list args) 70 { 71 const char *a; 72 char *p, *q; 73 size_t len = 0; 74 *s = NULL; 75 p = malloc(1); 76 if(p == NULL) 77 return 0; 78 len = 1; 79 while ((a = va_arg(args, const char*))) { 80 size_t n = strlen (a); 81 82 if(max_len && len + n > max_len){ 83 free(p); 84 return 0; 85 } 86 q = realloc(p, len + n); 87 if(q == NULL){ 88 free(p); 89 return 0; 90 } 91 p = q; 92 memcpy (p + len - 1, a, n); 93 len += n; 94 } 95 p[len - 1] = '\0'; 96 *s = p; 97 return len; 98 } 99 100 ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL 101 roken_mconcat (char **s, size_t max_len, ...) 102 { 103 size_t ret; 104 va_list args; 105 106 va_start(args, max_len); 107 ret = roken_vmconcat (s, max_len, args); 108 va_end(args); 109 return ret; 110 } 111