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gecko-dev/intl/uconv/util/ugen.c

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/* -*- 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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#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 uCheckAndGenAlways2ByteSwap(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGenAlways4Byte(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGenAlways4ByteSwap(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA3(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA4(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA5(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA6(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA7(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCheckAndGenAlways1ByteShiftGL(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCnGAlways8BytesComposedHangul(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uCnGAlways8BytesGLComposedHangul(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
);
PRIVATE PRBool uGenComposedHangulCommon(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen,
PRUint8 mask
);
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,
uCheckAndGenAlways2ByteSwap,
uCheckAndGenAlways4Byte,
uCheckAndGenAlways4ByteSwap,
uCheckAndGen2ByteGRPrefix8EA3,
uCheckAndGen2ByteGRPrefix8EA4,
uCheckAndGen2ByteGRPrefix8EA5,
uCheckAndGen2ByteGRPrefix8EA6,
uCheckAndGen2ByteGRPrefix8EA7,
uCheckAndGenAlways1ByteShiftGL,
uCnGAlways8BytesComposedHangul,
uCnGAlways8BytesGLComposedHangul
};
/*=================================================================================
=================================================================================*/
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 */
/* Oops, I don't agree. Code changed to check every time. [CATA] */
if(outbuflen < 1)
return PR_FALSE;
else
{
*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;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGenAlways2ByteSwap(
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 & 0xff;
out[1] = ((in >> 8 ) & 0xff);
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGenAlways4Byte(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
if(outbuflen < 4)
return PR_FALSE;
else
{
*outlen = 4;
out[0] = out[1] = 0x00;
out[2] = ((in >> 8 ) & 0xff);
out[3] = in & 0xff;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGenAlways4ByteSwap(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
if(outbuflen < 4)
return PR_FALSE;
else
{
*outlen = 4;
out[0] = ((in >> 8 ) & 0xff);
out[1] = in & 0xff;
out[2] = out[3] = 0x00;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA3( 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] = 0xA3;
out[2] = ((in >> 8 ) & 0xff) | 0x80;
out[3] = (in & 0xff) | 0x80;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA4( 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] = 0xA4;
out[2] = ((in >> 8 ) & 0xff) | 0x80;
out[3] = (in & 0xff) | 0x80;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA5( 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] = 0xA5;
out[2] = ((in >> 8 ) & 0xff) | 0x80;
out[3] = (in & 0xff) | 0x80;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA6( 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] = 0xA6;
out[2] = ((in >> 8 ) & 0xff) | 0x80;
out[3] = (in & 0xff) | 0x80;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGen2ByteGRPrefix8EA7( 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] = 0xA7;
out[2] = ((in >> 8 ) & 0xff) | 0x80;
out[3] = (in & 0xff) | 0x80;
return PR_TRUE;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uCheckAndGenAlways1ByteShiftGL(
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 */
/* Oops, I don't agree. Code changed to check every time. [CATA] */
if(outbuflen < 1)
return PR_FALSE;
else
{
*outlen = 1;
out[0] = in & 0x7f;
return PR_TRUE;
}
}
#define SBase 0xAC00
#define LCount 19
#define VCount 21
#define TCount 28
#define NCount (VCount * TCount)
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uGenComposedHangulCommon(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen,
PRUint8 mask
)
{
if(outbuflen < 8)
return PR_FALSE;
else
{
static PRUint8 lMap[LCount] = {
0xa1, 0xa2, 0xa4, 0xa7, 0xa8, 0xa9, 0xb1, 0xb2, 0xb3, 0xb5,
0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe
};
static PRUint8 tMap[TCount] = {
0xd4, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa9, 0xaa,
0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb4, 0xb5,
0xb6, 0xb7, 0xb8, 0xba, 0xbb, 0xbc, 0xbd, 0xbe
};
PRUint16 SIndex, LIndex, VIndex, TIndex;
/* the following line are copy from Unicode 2.0 page 3-13 */
/* item 1 of Hangul Syllabel Decomposition */
SIndex = in - SBase;
/* the following lines are copy from Unicode 2.0 page 3-14 */
/* item 2 of Hangul Syllabel Decomposition w/ modification */
LIndex = SIndex / NCount;
VIndex = (SIndex % NCount) / TCount;
TIndex = SIndex % TCount;
*outlen = 8;
out[0] = out[2] = out[4] = out[6] = (0xa4 & mask);
out[1] = 0xd4 & mask;
out[3] = lMap[LIndex] & mask;
out[5] = (VIndex + 0xbf) & mask;
out[7] = tMap[TIndex] & mask;
return PR_TRUE;
}
}
PRIVATE PRBool uCnGAlways8BytesComposedHangul(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
return uGenComposedHangulCommon(shift,state,in,out,outbuflen,outlen,0xff);
}
PRIVATE PRBool uCnGAlways8BytesGLComposedHangul(
uShiftTable *shift,
PRInt32* state,
PRUint16 in,
unsigned char* out,
PRUint32 outbuflen,
PRUint32* outlen
)
{
return uGenComposedHangulCommon(shift,state,in,out,outbuflen,outlen,0x7f);
}
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