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109 lines
1.8 KiB
C
109 lines
1.8 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* FILE: lib/sdk/crt/mbstring/mbsncmp.c
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* PURPOSE: Compares two strings to a maximum of n bytes or characters
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* PROGRAMER: Ariadne
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* UPDATE HISTORY:
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* 12/04/99: Created
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*/
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#include <mbstring.h>
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/*
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* @implemented
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*/
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int _mbsncmp(const unsigned char *str1, const unsigned char *str2, size_t n)
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{
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unsigned char *s1 = (unsigned char *)str1;
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unsigned char *s2 = (unsigned char *)str2;
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unsigned short *short_s1, *short_s2;
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int l1, l2;
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if (n == 0)
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return 0;
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do {
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if (*s1 == 0)
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break;
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l1 = _ismbblead(*s1);
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l2 = _ismbblead(*s2);
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if ( !l1 && !l2 ) {
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if (*s1 != *s2)
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return *s1 - *s2;
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else {
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s1 += 1;
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s2 += 1;
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n--;
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}
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}
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else if ( l1 && l2 ){
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short_s1 = (unsigned short *)s1;
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short_s2 = (unsigned short *)s2;
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if ( *short_s1 != *short_s2 )
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return *short_s1 - *short_s2;
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else {
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s1 += 2;
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s2 += 2;
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n--;
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}
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}
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else
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return *s1 - *s2;
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} while (n > 0);
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return 0;
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}
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/*
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* @implemented
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*/
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int _mbsnbcmp(const unsigned char *str1, const unsigned char *str2, size_t n)
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{
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unsigned char *s1 = (unsigned char *)str1;
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unsigned char *s2 = (unsigned char *)str2;
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unsigned short *short_s1, *short_s2;
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int l1, l2;
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if (n == 0)
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return 0;
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do {
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if (*s1 == 0)
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break;
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l1 = _ismbblead(*s1);
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l2 = _ismbblead(*s2);
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if ( !l1 && !l2 ) {
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if (*s1 != *s2)
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return *s1 - *s2;
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else {
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s1 += 1;
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s2 += 1;
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n--;
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}
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}
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else if ( l1 && l2 ){
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short_s1 = (unsigned short *)s1;
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short_s2 = (unsigned short *)s2;
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if ( *short_s1 != *short_s2 )
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return *short_s1 - *short_s2;
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else {
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s1 += 2;
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s2 += 2;
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n-=2;
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}
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}
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else
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return *s1 - *s2;
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} while (n > 0);
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return 0;
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}
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