59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/*
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* Make a hexquoted copy of a string
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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const char *
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hexquote_strndup(const char *src, const size_t src_len)
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{
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const size_t dst_size = 4 * src_len + 1;
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assert(dst_size > src_len);
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char *dst = malloc(dst_size);
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if (!dst)
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perror_msg_and_fail("malloc(%zu)", dst_size);
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char *p = dst;
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size_t i;
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for (i = 0; i < src_len; ++i) {
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unsigned int c = ((const unsigned char *) src)[i];
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*(p++) = '\\';
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*(p++) = 'x';
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*(p++) = "0123456789abcdef"[c >> 4];
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*(p++) = "0123456789abcdef"[c & 0xf];
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}
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*p = '\0';
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return dst;
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}
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