mtool.cpp

这是一个用BREW和VC++开发的暴力摩托游戏,与大家一同分享.

#include "MTool.h"

int CMTool::BytesToIntLittleEndian(const byte *buf, int length) {
/*
//	buf : 箭磊啊 little endian栏肺 扁废登绢 乐绰 官捞呈府狼 矫累 林家.
//	length : 箭磊狼 辨捞
//	return value : 函券等 搬苞蔼
*/
	int r = 0, i;

	for ( i = 0 ; i < length; ++i ) {
		r += ( buf[i] & 0xff ) << ( i * 8 );
	}

	return r;
}

void CMTool::IntToBytesLittleEndian(int n, byte *buf, int BufferLen) {
/*
//	n : 镜妨绰 箭磊
//	buf : 箭磊啊 little endian栏肺 扁废瞪 官捞呈府狼 矫累 林家.
//	bufferLen : buf 俊辑何磐 啊侩 啊瓷茄 农扁
*/
	int i;
	int toI;

	if ( BufferLen == -1 ) {
		toI = getByteSize(n);
	} else {
		toI = BufferLen;
	}

	i = 0;
	
	while( true ) {
		buf[i] = (byte)(n & 0xff);
		n = n >> 8;
		i++;
		if ( i == toI )
			break;
	}
}

int CMTool::getByteSize(int n) {
	int r = 0;
	
	do {
		r++;
		n = n >> 8;
	} while ( n != 0 );
	
	return r;
}

uint32 CMTool::ntohl(uint32 n) {
	//return ( ( n & 0xff ) << 24 ) + ( ( n & 0xff00) << 16 ) + ( ( n & 0xff0000) >> 8 ) + ( ( n & 0xff000000 ) >> 24 );
	return ( ( n & 0xff ) << 24 ) + ( ( n & 0xff00) << 8 ) + ( ( n & 0xff0000) >> 8 ) + ( ( n & 0xff000000 ) >> 24 );
}


int CMTool::atoi(const byte *buf, int len) {
	int i;
	int tot = 0;
	int n = 1;
	int s = 0;

	if ( buf[0] == '-' )
		s = 1;

	for ( i = len-1; i >= s; --i ) {
		tot += (buf[i]-'0')*n;
		n *= 10;
	}

	return (s==0? tot: -tot);
}