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annotate lib/memcasecmp.c @ 583:3647a9e59ad1

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author Jim Meyering <jim@meyering.net>
date Wed, 10 Apr 1996 03:29:05 +0000
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children 21fe6b0a7865
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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583
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1 #ifdef HAVE_CONFIG_H
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2 # include <config.h>
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3 #endif
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4
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5 #include <sys/types.h>
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6 #include <ctype.h>
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7
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8 #if _LIBC || STDC_HEADERS
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9 # define TOLOWER(c) tolower (c)
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10 #else
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11 # define TOLOWER(c) (ISUPPER (c) ? tolower (c) : (c))
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12 #endif
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13
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14 #include "memcasecmp.h"
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15
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16 /* Like memcmp, but ignore differences in case. */
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17
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18 int
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19 memcasecmp (const void *vs1, const void *vs2, size_t n)
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20 {
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21 unsigned int i;
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22 unsigned char *s1 = (unsigned char *) vs1;
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23 unsigned char *s2 = (unsigned char *) vs2;
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24 for (i = 0; i < n; i++)
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25 {
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26 unsigned char u1 = *s1++;
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27 unsigned char u2 = *s2++;
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28 if (TOLOWER (u1) != TOLOWER (u2))
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29 return TOLOWER (u1) - TOLOWER (u2);
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30 }
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31 return 0;
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32 }