47 lines
860 B
C
47 lines
860 B
C
/*
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* Make a hexdump copy of C string
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*
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* Copyright (c) 2016-2018 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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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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hexdump_memdup(const char *src, size_t len)
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{
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size_t dst_size = 3 * len + 2;
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assert(dst_size > 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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const unsigned char *usrc = (const unsigned char *) src;
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size_t i;
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for (i = 0; i < len; ++i) {
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unsigned int c = usrc[i];
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*(p++) = ' ';
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if (i == 8)
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*(p++) = ' ';
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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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const char *
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hexdump_strdup(const char *src)
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{
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return hexdump_memdup(src, strlen(src));
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}
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