1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/***
*memicmp.c - compare memory, ignore case
*
* Copyright (c) 1988-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _memicmp() - compare two blocks of memory for lexical
* order. Case is ignored in the comparison.
*
*Revision History:
* 05-31-89 JCR C version created.
* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
* copyright. Also, fixed compiler warnings.
* 10-01-90 GJF New-style function declarator. Also, rewrote expr. to
* avoid using cast as an lvalue.
* 01-17-91 GJF ANSI naming.
* 10-11-91 GJF Bug fix! Comparison of final bytes must use unsigned
* chars.
* 06-28-94 SRW Rewrite to use same ANSI specific tolower logic as x86
* assembler version is i386\memicmp.asm
*
*******************************************************************************/
#include <cruntime.h>
#include <ctype.h>
#include <string.h>
/***
*int _memicmp(first, last, count) - compare two blocks of memory, ignore case
*
*Purpose:
* Compares count bytes of the two blocks of memory stored at first
* and last. The characters are converted to lowercase before
* comparing (not permanently), so case is ignored in the search.
*
*Entry:
* char *first, *last - memory buffers to compare
* unsigned count - maximum length to compare
*
*Exit:
* returns < 0 if first < last
* returns 0 if first == last
* returns > 0 if first > last
*
*Uses:
*
*Exceptions:
*
*******************************************************************************/
int _CALLTYPE1 _memicmp (
const void * first,
const void * last,
unsigned int count
)
{
unsigned char f,l;
if (count) do {
f = *((const char *)first)++;
l = *((const char *)last)++;
if (f != l) {
if (f>='A' && f<='Z') {
f = f - 'A' + 'a';
}
if (l>='A' && l<='Z') {
l = l - 'A' + 'a';
}
if (f!=l) {
return f-l;
}
}
}
while (--count);
return 0;
}
|
