Wince下GB（国标字符）和Unicode的相互转换方法

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