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91 lines
1.6 KiB
C
91 lines
1.6 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/msvcrt/mbstring/mbsncpy.c
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* PURPOSE: Copies a string 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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unsigned char* _mbsncpy(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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if (n == 0)
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return 0;
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do {
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if (*s2 == 0)
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break;
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if ( !_ismbblead(*s2) ) {
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*s1 = *s2;
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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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else {
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short_s1 = (unsigned short *)s1;
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short_s2 = (unsigned short *)s2;
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*short_s1 = *short_s2;
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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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} while (n > 0);
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return str1;
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}
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/*
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* The _mbsnbcpy function copies count bytes from src to dest. If src is shorter
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* than dest, the string is padded with null characters. If dest is less than or
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* equal to count it is not terminated with a null character.
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*
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* @implemented
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*/
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unsigned char * _mbsnbcpy(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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if (n == 0)
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return 0;
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do {
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if (*s2 == 0) {
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*s1 = *s2;
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break;
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}
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if ( !_ismbblead(*s2) ) {
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*s1 = *s2;
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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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else {
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short_s1 = (unsigned short *)s1;
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short_s2 = (unsigned short *)s2;
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*short_s1 = *short_s2;
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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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} while (n > 0);
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return str1;
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}
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