/* This source code was extracted from the Q8 package created and placed in the PUBLIC DOMAIN by Doug Gwyn <gwyn@arl.mil> last edit: 1999/11/05 gwyn@arl.mil Implements subclause 7.24 of ISO/IEC 9899:1999 (E). It supports an encoding where all char codes are mapped to the *same* code values within a wchar_t or wint_t, so long as no other wchar_t codes are used by the program. */ #include <wchar.h> int wmemcmp(s1, s2, n) register const wchar_t *s1; register const wchar_t *s2; size_t n; { if ( n == 0 || s1 == s2 ) return 0; /* even for NULL pointers */ if ( (s1 != NULL) != (s2 != NULL) ) return s2 == NULL ? 1 : -1; /* robust */ for ( ; n > 0; ++s1, ++s2, --n ) if ( *s1 != *s2 ) return *s1 - *s2; return 0; }