Strncasecmp.java

/*
This file is part of jpcsp.

Jpcsp is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Jpcsp is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Jpcsp.  If not, see <http://www.gnu.org/licenses/>.
 */
package jpcsp.Allegrex.compiler.nativeCode;

import jpcsp.memory.IMemoryReader;
import jpcsp.memory.MemoryReader;

/**
 * @author gid15
 *
 */
public class Strncasecmp extends AbstractNativeCodeSequence {
	static public void call() {
		int src1Addr = getGprA0();
		int src2Addr = getGprA1();
		int n = getGprA2();

		if (n > 0) {
			IMemoryReader memoryReader1 = MemoryReader.getMemoryReader(src1Addr, n, 1);
			IMemoryReader memoryReader2 = MemoryReader.getMemoryReader(src2Addr, n, 1);

			if (memoryReader1 != null && memoryReader2 != null) {
				for (int i = 0; i < n; i++) {
					int c1 = toLowerCase[memoryReader1.readNext()];
					int c2 = toLowerCase[memoryReader2.readNext()];
					if (c1 != c2) {
						setGprV0(c1 - c2);
						return;
					} else if (c1 == 0) {
						// c1 == 0 and c2 == 0
						break;
					}
				}
			}
		}

		setGprV0(0);
	}
}