annotate mupdf-source/thirdparty/jbig2dec/memcmp.c @ 46:7ee69f120f19 default tip

>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
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1 /* Copyright (C) 2001-2023 Artifex Software, Inc.
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2 All Rights Reserved.
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4 This software is provided AS-IS with no warranty, either express or
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5 implied.
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7 This software is distributed under license and may not be copied,
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8 modified or distributed except as expressly authorized under the terms
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9 of the license contained in the file LICENSE in this distribution.
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11 Refer to licensing information at http://www.artifex.com or contact
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12 Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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13 CA 94129, USA, for further information.
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14 */
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16 /*
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17 jbig2dec
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18 */
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20 #ifdef HAVE_CONFIG_H
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21 #include "config.h"
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22 #endif
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24 #include <stddef.h>
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26 /* replacement for broken memcmp() */
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28 /*
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29 * compares two byte strings 'a' and 'b', both assumed to be 'len' bytes long
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30 * returns zero if the two strings are identical, otherwise returns -1 or 1
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31 * depending on the relative magnitude of the first differing elements,
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32 * considered as unsigned chars
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33 */
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35 int
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36 memcmp(const void *b1, const void *b2, size_t len)
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37 {
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38 unsigned char *a, *b;
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39 size_t i;
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41 a = (unsigned char *)b1;
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42 b = (unsigned char *)b2;
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43 for (i = 0; i < len; i++) {
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44 if (*a != *b) {
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45 /* strings differ */
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46 return (*a < *b) ? -1 : 1;
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47 }
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48 a++;
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49 b++;
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50 }
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52 /* strings match */
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53 return 0;
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54 }