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#include <corecrt_internal_mbstring.h>#include <locale.h>#include <string.h>
#pragma warning(disable:__WARNING_POTENTIAL_BUFFER_OVERFLOW_NULLTERMINATED) // 26018
/**** _mbscmp - Compare MBCS strings**Purpose:* Compares two strings in ordinal order. * Single byte strings are compared byte-by-byte* Double byte strings are compared by character* (basically ensuring that double byte sequences are higher than single byte)* UTF-8 is compared byte-by-byte, which work since its the same as character order.**Entry:* char *s1, *s2 = strings to compare**WARNING:* No validation for improper UTF-8 strings, mixed up lead/trail byte orders are not defined.**Exit:* Returns <0 if s1 < s2* Returns 0 if s1 == s2* Returns >0 if s1 > s2* Returns _NLSCMPERROR is something went wrong**Exceptions:* Input parameters are validated. Refer to the validation section of the function.********************************************************************************/
extern "C" int __cdecl _mbscmp_l( const unsigned char *s1, const unsigned char *s2, _locale_t plocinfo ){ unsigned short c1, c2; _LocaleUpdate _loc_update(plocinfo);
/* validation section */ _VALIDATE_RETURN(s1 != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(s2 != nullptr, EINVAL, _NLSCMPERROR); if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0) return strcmp((const char *)s1, (const char *)s2);
for (;;) {
c1 = *s1++; if ( _ismbblead_l(c1, _loc_update.GetLocaleT()) ) c1 = ( (*s1 == '\0') ? 0 : ((c1<<8) | *s1++) );
c2 = *s2++; if ( _ismbblead_l(c2, _loc_update.GetLocaleT()) ) c2 = ( (*s2 == '\0') ? 0 : ((c2<<8) | *s2++) );
if (c1 != c2) return (c1 > c2) ? 1 : -1;
if (c1 == 0) return 0;
}}
extern "C" int (__cdecl _mbscmp)( const unsigned char *s1, const unsigned char *s2 ){ return _mbscmp_l(s1, s2, nullptr);}