学步园

wince下字符都是unicode编码，做项目使用的XML也需要是unicode字符，而项目中显示屏LCD是GB字符，使用的时候就存在两者的转换问题经过google后，发现这种转换只能通过查表的形式进行，把unicode和GB码对应的字符做成二维码表，然后查找获取。GB字符总共21791，查找采用了二分法查找。

1、unicode转换成GB

//函数功能是unicode转成GB，码表需要按unicode进行排序！

unsigned short  UnicodeTOGBK(unsigned short unicode)
{
	int low=0,high=TotalGBKNum-1,mid;
	while(low <= high)
	{
		
		mid = (low+high)/2;	
		int x=GBK2UNICODETBL[mid][1];
		if(GBK2UNICODETBL[mid][1] == unicode)
			return GBK2UNICODETBL[mid][0];		
		if(GBK2UNICODETBL[mid][1]>unicode)
			high=mid-1;
		
		else
			low=mid+1;
	}	
	
	return 0xFFFF;
}

2、GB转成unicode

//函数功能是GB转成unicode，码表需要按GB进行排序！

unsigned int gb2unicode(unsigned short *unicode,unsigned char*gb,int len) 
{ 
    int i,j; 
	
    i=0; 
    for(j=0;i<len;j++) 
    { 
        if ((unsigned char)gb[j]<=0x80) 
        { 
            unicode[j]=(unsigned short)gb[j]; 
            i++; 
        }
        else 
        { 
            unicode[j]=ESM_getValidGBCode(*(unsigned short *)(gb+i)); 
            i+=2; 
        } 
		#ifdef Little2Big_Endian
		reverise_w(&unicode[j]);
    #endif
    } 
    return j*2; 
} 

unsigned short  ESM_getValidGBCode(unsigned short gb)
{
	int low=0,high=TotalGBKNum-1,mid;

	while(low <= high)
	{
		mid = (low+high)/2;
		
		if(GBK2UNICODETBL[mid][0] == gb)
			return GBK2UNICODETBL[mid][1];
			
		if(GBK2UNICODETBL[mid][0]>gb)
			high=mid-1;
			
		else
			low=mid+1;
	}	
	
	return 0xFFFF;
}

对应的码表下载链接：http://download.csdn.net/detail/mjx91282041/4768949