f_unicode.c

S3C2410 USB Mass storage 源码.

#include "f_system.h" 

#ifdef _READ_SD_

#include "gb2u_table.h"
#include "gbk2uni.h"



#ifndef GB2312_CODE
#define GB2312_CODE
#endif

#ifndef GBK_CODE
#define GBK_CODE
#endif
/*
u16 MX_Big5ToUnicode(u16 big5)
{
	u16 c1, c2;
	u32 offset;
	u16 unicode;

	c1 = (big5>>8)&0x00FF;
	c2 = big5&0x00FF;
	c2 -= (c2>=0xA1?(0xA1-0x3F):0x40);
	offset = ((c1-0x81)*157+c2)*2;
	unicode = (((u16)(BtoU[offset+1]))<<8)+(u16)(BtoU[offset]);
	return unicode;
}

u16 MX_UnicodeToBig5(u16 unicode)
{
	u32 offset;
	u16 big5;

	if(unicode>0x80)
	{
		offset = unicode*2;
		big5 = (((u16)(UtoB[offset+1]))<<8)+(u16)(UtoB[offset]);
	}else{
		big5 = unicode;
	}
	return big5;
}

void MX_UniStrToBig5Str(u16 *unistr, u8 *big5str)
{
	u16 i,j;
	u16 big5;
	
	i=0;
	j=0;
	while(unistr[i]!=0x0000)
	{
		big5=MX_UnicodeToBig5(unistr[i]);
		if(big5 > 0x80)
		{
			big5str[j]=(big5>>8)&0xFF;
			big5str[j+1]=(big5&0xFF);
			j+=2;
		}else{
			big5str[j]=(u8)big5;
			j++;
		}
		i++;
	}
	big5str[j]=0x00;
}

void  MX_Big5StrToUniStr(u8 *big5str, u16 *unistr)
{
	u16 i,j;
	u16 uni;

	i=0;
	j=0;
	while(big5str[i]!=0x00)
	{
		if(big5str[i]<0x80)
		{
			unistr[j]=(u16)big5str[i];
			i++;
			j++;
		}else{
			uni = (((u16)(big5str[i]))<<8)+(u16)(big5str[i+1]);
			unistr[j]=MX_Big5ToUnicode(uni);
			i+=2;
			j++;
		}
	}
	unistr[j]=0x0000;
}
*/

u16 F_GB2312ToUnicode(u16 gb2312)
{
	u32 offset;
	u16 unicode=0;
#ifdef GBK_CODE
	if(gb2312<=0x00FF)
	{
		unicode=gb2312;
	}
	else
	{
		for(offset=0; offset<GBKTableSize; offset++)
		{
			if(gb2312 == gbk2uni_table[offset][0])
			{
				break;
			}
		}
		//if(offset==6768)
		if(offset==21791)//Modified by Amy 20080103
		{
			return 0;
		}
		else
		{
			unicode = gbk2uni_table[offset][1];
		}
	}
	return unicode;
#else
	if(gb2312<=0x00FF)
	{
		unicode=gb2312;
	}
	else
	{
		for(offset=0; offset<GB2312TableSize; offset++)
	{
			if(gb2312 == gb2u_table[offset][1])
		{
			break;
		}
		}
		if(offset==6768)
		{
			mdt_printf("Can not find gb2312...\n");
			return 0;
		}
		else
		{
			unicode = gb2u_table[offset][0];
		}
	}
	//mdt_printf("1.BtoU[%d]=%x\n",offset-1, gb2u_table[offset-1]);
	//mdt_printf("2.BtoU[%d]=%x\n",offset-1, unicode);
	return unicode;
#endif
}

u16 F_UnicodeToGB2312(u16 unicode)
{
	u32 offset;
	u16 gb2312;

#ifdef GBK_CODE
	if(unicode<=0x00FF)
	{
		gb2312=unicode;
	}
	else
	{
		for(offset=0; offset<GBKTableSize; offset++)
		{
			if(unicode == gbk2uni_table[offset][1])
			{
				break;
			}
		}
		//if(offset==6768)
		if(offset==21791)//Modified by Amy 20080103
		{
			return 0;
		}
		else
		{
			gb2312 = gbk2uni_table[offset][0];
		}
	}
	return gb2312;
#else
	if(unicode<=0x00FF)
	{
		gb2312=unicode;
//		mdt_printf("ASCII: %c\n", unicode);
	}
	else
	{
		for(offset=0; offset<GB2312TableSize; offset++)
		{
			if(unicode == gb2u_table[offset][0])
		{
			break;
		}
		}
		if(offset==6768)
		{
			mdt_printf("Can not find Unicode...\n");
			return 0;
		}
		else
		{
			gb2312 = gb2u_table[offset][1];
		}
	}
//	mdt_printf("gb2312=%x\n", gb2312);
	return gb2312;
#endif
}

void F_UniStrToGB2312Str(u16 *unistr, u8 *gb2312str)
{
	u16 i,j;
	u16 gb2312;
	
	i=0;
	j=0;
	while(unistr[i]!=0x0000)
	{
		//mdt_printf("unistr[%d]=%x,unistr[%d]=%x\n",i,unistr[i],i+1,unistr[i+1]);
		gb2312=F_UnicodeToGB2312(unistr[i]);
		if(gb2312 > 0x80)
		{
			gb2312str[j]=(gb2312>>8)&0xFF;
			gb2312str[j+1]=(gb2312&0xFF);
			j+=2;
		}else{
			gb2312str[j]=(u8)gb2312;
			j++;
		}
		i++;
	}
	//mdt_printf("i=%d,j=%d,Big5=%x,%x,%x,%x\n",i,j,big5str[0], big5str[1], big5str[2],big5str[3]);
	gb2312str[j]=0x00;
}

void  F_GB2312StrToUniStr(u8 *gb2312str, u16 *unistr)
{
	u16 i,j;
	u16 uni;

	i=0;
	j=0;
	while(gb2312str[i]!=0x00)
	{
		if(gb2312str[i]<0x80)
		{
			unistr[j]=(u16)gb2312str[i];
			i++;
			j++;
		}else{
			uni = MDT_2xU8_To_1xU16(gb2312str[i], gb2312str[i+1]);
			unistr[j]=F_GB2312ToUnicode(uni);
			i+=2;
			j++;
		}
	}
	unistr[j]=0x0000;		//Denny 2006-12-08
}

#endif /* _READ_SD_ */