path: root/zap/src/strcmp.c

/*
	Copyright 2022 Gabriel Jensen.
	This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
	If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/

#include <zap/priv.h>

#include <zap/mem.h>

#include <stdint.h>

int_least8_t zap_strcmp(char const * const _lstr,char const * const _rstr) {
	unsigned char const * lpos = (unsigned char const *)_lstr;
	unsigned char const * rpos = (unsigned char const *)_rstr;
	for (;;++lpos,++rpos) {
		unsigned char const lchr = *lpos;
		unsigned char const rchr = *rpos;
		sus_likely   (lchr != rchr)               {return lchr < rchr ? INT_LEAST8_MIN : INT_LEAST8_MAX;}
		sus_unlikely (lchr == (unsigned char)0x0) {return 0x0;}
	}
	sus_unreach();
}