1 /* 2 * Make a hexquoted copy of a string 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "tests.h" 31 32 #include <assert.h> 33 #include <stdlib.h> 34 #include <string.h> 35 36 const char * 37 hexquote_strndup(const char *src, const size_t src_len) 38 { 39 const size_t dst_size = 4 * src_len + 1; 40 assert(dst_size > src_len); 41 42 char *dst = malloc(dst_size); 43 if (!dst) 44 perror_msg_and_fail("malloc(%zu)", dst_size); 45 46 char *p = dst; 47 size_t i; 48 for (i = 0; i < src_len; ++i) { 49 unsigned int c = ((const unsigned char *) src)[i]; 50 *(p++) = '\\'; 51 *(p++) = 'x'; 52 *(p++) = "0123456789abcdef"[c >> 4]; 53 *(p++) = "0123456789abcdef"[c & 0xf]; 54 } 55 *p = '\0'; 56 57 return dst; 58 } 59
