pjs/intl/uconv/util/ugen.c

381 строка
9.7 KiB
C
Исходник Обычный вид История

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "unicpriv.h"
/*=================================================================================
=================================================================================*/
typedef PRBool (*uSubGeneratorFunc) (PRUint16 in, unsigned char* out);
/*=================================================================================
=================================================================================*/
typedef PRBool (*uGeneratorFunc) (
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
MODULE_PRIVATE PRBool uGenerate(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
#define uSubGennerator(sub,in,out) (* m_subgenerator[sub])((in),(out))
PRIVATE PRBool uCheckAndGenAlways1Byte(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGenAlways2Byte(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGenAlways2ByteShiftGR(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGenByTable(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8F(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA2(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uGenAlways2Byte(
PRUint16 in,
unsigned char* out
);
PRIVATE PRBool uGenAlways2ByteShiftGR(
PRUint16 in,
unsigned char* out
);
PRIVATE PRBool uGenAlways1Byte(
PRUint16 in,
unsigned char* out
);
PRIVATE PRBool uGenAlways1BytePrefix8E(
PRUint16 in,
unsigned char* out
);
PRIVATE PRBool uGenAlways2ByteUTF8(
PRUint16 in,
unsigned char* out
);
PRIVATE PRBool uGenAlways3ByteUTF8(
PRUint16 in,
unsigned char* out
);
/*=================================================================================
=================================================================================*/
PRIVATE uGeneratorFunc m_generator[uNumOfCharsetType] =
{
uCheckAndGenAlways1Byte,
uCheckAndGenAlways2Byte,
uCheckAndGenByTable,
uCheckAndGenAlways2ByteShiftGR,
uCheckAndGen2ByteGRPrefix8F,
uCheckAndGen2ByteGRPrefix8EA2,
};
/*=================================================================================
=================================================================================*/
PRIVATE uSubGeneratorFunc m_subgenerator[uNumOfCharType] =
{
uGenAlways1Byte,
uGenAlways2Byte,
uGenAlways2ByteShiftGR,
uGenAlways1BytePrefix8E,
uGenAlways2ByteUTF8,
uGenAlways3ByteUTF8
};
/*=================================================================================
=================================================================================*/
MODULE_PRIVATE PRBool uGenerate(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
return (* m_generator[shift->classID]) (shift,state,in,out,outbuflen,outlen);
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uGenAlways1Byte(
PRUint16 in,
unsigned char* out
)
{
out[0] = (unsigned char)in;
return PR_TRUE;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uGenAlways2Byte(
PRUint16 in,
unsigned char* out
)
{
out[0] = (unsigned char)((in >> 8) & 0xff);
out[1] = (unsigned char)(in & 0xff);
return PR_TRUE;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uGenAlways2ByteShiftGR(
PRUint16 in,
unsigned char* out
)
{
out[0] = (unsigned char)(((in >> 8) & 0xff) | 0x80);
out[1] = (unsigned char)((in & 0xff) | 0x80);
return PR_TRUE;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uGenAlways1BytePrefix8E(
PRUint16 in,
unsigned char* out
)
{
out[0] = 0x8E;
out[1] = (unsigned char)(in & 0xff);
return PR_TRUE;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uGenAlways2ByteUTF8(
PRUint16 in,
unsigned char* out
)
{
out[0] = (unsigned char)(0xC0 | (( in >> 6 ) & 0x1F));
out[1] = (unsigned char)(0x80 | (( in ) & 0x3F));
return PR_TRUE;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uGenAlways3ByteUTF8(
PRUint16 in,
unsigned char* out
)
{
out[0] = (unsigned char)(0xE0 | (( in >> 12 ) & 0x0F));
out[1] = (unsigned char)(0x80 | (( in >> 6 ) & 0x3F));
out[2] = (unsigned char)(0x80 | (( in ) & 0x3F));
return PR_TRUE;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGenAlways1Byte(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
/* Don't check inlen. The caller should ensure it is larger than 0 */
*outlen = 1;
out[0] = in & 0xff;
return PR_TRUE;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGenAlways2Byte(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
if(outbuflen < 2)
return PR_FALSE;
else
{
*outlen = 2;
out[0] = ((in >> 8 ) & 0xff);
out[1] = in & 0xff;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGenAlways2ByteShiftGR(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
if(outbuflen < 2)
return PR_FALSE;
else
{
*outlen = 2;
out[0] = ((in >> 8 ) & 0xff) | 0x80;
out[1] = (in & 0xff) | 0x80;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGenByTable(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
PRInt16 i;
uShiftCell* cell = &(shift->shiftcell[0]);
PRInt16 itemnum = shift->numOfItem;
unsigned char inH, inL;
inH = (in >> 8) & 0xff;
inL = (in & 0xff );
for(i=0;i<itemnum;i++)
{
if( ( inL >= cell[i].shiftout.MinLB) &&
( inL <= cell[i].shiftout.MaxLB) &&
( inH >= cell[i].shiftout.MinHB) &&
( inH <= cell[i].shiftout.MaxHB) )
{
if(outbuflen < cell[i].reserveLen)
return PR_FALSE;
else
{
*outlen = cell[i].reserveLen;
return (uSubGennerator(cell[i].classID,in,out));
}
}
}
return PR_FALSE;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8F( uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
if(outbuflen < 3)
return PR_FALSE;
else
{
*outlen = 3;
out[0] = 0x8F;
out[1] = ((in >> 8 ) & 0xff) | 0x80;
out[2] = (in & 0xff) | 0x80;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA2( uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
if(outbuflen < 4)
return PR_FALSE;
else
{
*outlen = 4;
out[0] = 0x8E;
out[1] = 0xA2;
out[2] = ((in >> 8 ) & 0xff) | 0x80;
out[3] = (in & 0xff) | 0x80;
return PR_TRUE;
}
}