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|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "unicpriv.h"
#define CHK_GR94(b) ( (uint8_t) 0xa0 < (uint8_t) (b) && (uint8_t) (b) < (uint8_t) 0xff )
#define CHK_GR94_2Byte(b1,b2) (CHK_GR94(b1) && CHK_GR94(b2))
/*=================================================================================
=================================================================================*/
typedef int (*uSubScannerFunc) (unsigned char* in, uint16_t* out);
/*=================================================================================
=================================================================================*/
typedef int (*uScannerFunc) (
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uScan(
uScanClassID scanClass,
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
#define uSubScanner(sub,in,out) (* m_subscanner[sub])((in),(out))
int uCheckAndScanAlways1Byte(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScanAlways2Byte(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScanAlways2ByteShiftGR(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScanAlways2ByteGR128(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uScanShift(
uShiftInTable *shift,
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScan2ByteGRPrefix8F(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScan2ByteGRPrefix8EA2(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScan2ByteGRPrefix8EA3(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScan2ByteGRPrefix8EA4(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScan2ByteGRPrefix8EA5(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScan2ByteGRPrefix8EA6(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScan2ByteGRPrefix8EA7(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCnSAlways8BytesDecomposedHangul(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScanJohabHangul(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScanJohabSymbol(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uCheckAndScan4BytesGB18030(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
);
int uScanAlways2Byte(
unsigned char* in,
uint16_t* out
);
int uScanAlways2ByteShiftGR(
unsigned char* in,
uint16_t* out
);
int uScanAlways1Byte(
unsigned char* in,
uint16_t* out
);
int uScanAlways1BytePrefix8E(
unsigned char* in,
uint16_t* out
);
/*=================================================================================
=================================================================================*/
const uScannerFunc m_scanner[uNumOfCharsetType] =
{
uCheckAndScanAlways1Byte,
uCheckAndScanAlways2Byte,
uCheckAndScanAlways2ByteShiftGR,
uCheckAndScan2ByteGRPrefix8F,
uCheckAndScan2ByteGRPrefix8EA2,
uCheckAndScan2ByteGRPrefix8EA3,
uCheckAndScan2ByteGRPrefix8EA4,
uCheckAndScan2ByteGRPrefix8EA5,
uCheckAndScan2ByteGRPrefix8EA6,
uCheckAndScan2ByteGRPrefix8EA7,
uCnSAlways8BytesDecomposedHangul,
uCheckAndScanJohabHangul,
uCheckAndScanJohabSymbol,
uCheckAndScan4BytesGB18030,
uCheckAndScanAlways2ByteGR128
};
/*=================================================================================
=================================================================================*/
const uSubScannerFunc m_subscanner[uNumOfCharType] =
{
uScanAlways1Byte,
uScanAlways2Byte,
uScanAlways2ByteShiftGR,
uScanAlways1BytePrefix8E
};
/*=================================================================================
=================================================================================*/
int uScan(
uScanClassID scanClass,
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
return (* m_scanner[scanClass]) (state,in,out,inbuflen,inscanlen);
}
/*=================================================================================
=================================================================================*/
int uScanAlways1Byte(
unsigned char* in,
uint16_t* out
)
{
*out = (uint16_t) in[0];
return 1;
}
/*=================================================================================
=================================================================================*/
int uScanAlways2Byte(
unsigned char* in,
uint16_t* out
)
{
*out = (uint16_t) (( in[0] << 8) | (in[1]));
return 1;
}
/*=================================================================================
=================================================================================*/
int uScanAlways2ByteShiftGR(
unsigned char* in,
uint16_t* out
)
{
*out = (uint16_t) ((( in[0] << 8) | (in[1])) & 0x7F7F);
return 1;
}
/*=================================================================================
=================================================================================*/
int uScanAlways1BytePrefix8E(
unsigned char* in,
uint16_t* out
)
{
*out = (uint16_t) in[1];
return 1;
}
/*=================================================================================
=================================================================================*/
int uCheckAndScanAlways1Byte(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
/* Don't check inlen. The caller should ensure it is larger than 0 */
*inscanlen = 1;
*out = (uint16_t) in[0];
return 1;
}
/*=================================================================================
=================================================================================*/
int uCheckAndScanAlways2Byte(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
if(inbuflen < 2)
return 0;
else
{
*inscanlen = 2;
*out = ((in[0] << 8) | ( in[1])) ;
return 1;
}
}
/*=================================================================================
=================================================================================*/
int uCheckAndScanAlways2ByteShiftGR(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
/*
* Both bytes should be in the range of [0xa1,0xfe] for 94x94 character sets
* invoked on GR. No encoding implemented in Mozilla uses 96x96 char. sets.
* Only 2nd byte range needs to be checked because
* 1st byte is checked before calling this in nsUnicodeDecoerHelper.cpp
*/
if(inbuflen < 2) /* will lead to NS_OK_UDEC_MOREINPUT */
return 0;
else if (! CHK_GR94(in[1]))
{
*inscanlen = 2;
*out = 0xFF; /* for 2-byte table, uMap() is guaranteed to fail for 0xFF. */
return 1;
}
else
{
*inscanlen = 2;
*out = (((in[0] << 8) | ( in[1])) & 0x7F7F);
return 1;
}
}
/*=================================================================================
=================================================================================*/
int uCheckAndScanAlways2ByteGR128(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
/*
* The first byte should be in [0xa1,0xfe]
* and the second byte in [0x41,0xfe]
* Used by CP949 -> Unicode converter.
* Only 2nd byte range needs to be checked because
* 1st byte is checked before calling this in nsUnicodeDecoderHelper.cpp
*/
if(inbuflen < 2) /* will lead to NS_OK_UDEC_MOREINPUT */
return 0;
else if (in[1] < 0x41) /* 2nd byte range check */
{
*inscanlen = 2;
*out = 0xFF; /* for 2-byte table, uMap() is guaranteed to fail for 0xFF. */
return 1;
}
else
{
*inscanlen = 2;
*out = (in[0] << 8) | in[1];
return 1;
}
}
/*=================================================================================
=================================================================================*/
int uScanShift(
uShiftInTable *shift,
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
int16_t i;
const uShiftInCell* cell = &(shift->shiftcell[0]);
int16_t itemnum = shift->numOfItem;
for(i=0;i<itemnum;i++)
{
if( ( in[0] >= cell[i].shiftin_Min) &&
( in[0] <= cell[i].shiftin_Max))
{
if(inbuflen < cell[i].reserveLen)
return 0;
else
{
*inscanlen = cell[i].reserveLen;
return (uSubScanner(cell[i].classID,in,out));
}
}
}
return 0;
}
/*=================================================================================
=================================================================================*/
int uCheckAndScan2ByteGRPrefix8F(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
if((inbuflen < 3) ||(in[0] != 0x8F))
return 0;
else if (! CHK_GR94(in[1])) /* 2nd byte range check */
{
*inscanlen = 2;
*out = 0xFF; /* for 2-byte table, uMap() is guaranteed to fail for 0xFF. */
return 1;
}
else if (! CHK_GR94(in[2])) /* 3rd byte range check */
{
*inscanlen = 3;
*out = 0xFF; /* for 2-byte table, uMap() is guaranteed to fail for 0xFF. */
return 1;
}
else
{
*inscanlen = 3;
*out = (((in[1] << 8) | ( in[2])) & 0x7F7F);
return 1;
}
}
/*=================================================================================
=================================================================================*/
/* Macro definition to use for uCheckAndScan2ByteGRPrefix8EAX()
* where X is 2,3,4,5,6,7
*/
#define CNS_8EAX_4BYTE(PREFIX) \
if((inbuflen < 4) || (in[0] != 0x8E)) \
return 0; \
else if((in[1] != (PREFIX))) \
{ \
*inscanlen = 2; \
*out = 0xFF; \
return 1; \
} \
else if(! CHK_GR94(in[2])) \
{ \
*inscanlen = 3; \
*out = 0xFF; \
return 1; \
} \
else if(! CHK_GR94(in[3])) \
{ \
*inscanlen = 4; \
*out = 0xFF; \
return 1; \
} \
else \
{ \
*inscanlen = 4; \
*out = (((in[2] << 8) | ( in[3])) & 0x7F7F); \
return 1; \
}
int uCheckAndScan2ByteGRPrefix8EA2(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
CNS_8EAX_4BYTE(0xA2)
}
/*=================================================================================
=================================================================================*/
int uCheckAndScan2ByteGRPrefix8EA3(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
CNS_8EAX_4BYTE(0xA3)
}
/*=================================================================================
=================================================================================*/
int uCheckAndScan2ByteGRPrefix8EA4(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
CNS_8EAX_4BYTE(0xA4)
}
/*=================================================================================
=================================================================================*/
int uCheckAndScan2ByteGRPrefix8EA5(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
CNS_8EAX_4BYTE(0xA5)
}
/*=================================================================================
=================================================================================*/
int uCheckAndScan2ByteGRPrefix8EA6(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
CNS_8EAX_4BYTE(0xA6)
}
/*=================================================================================
=================================================================================*/
int uCheckAndScan2ByteGRPrefix8EA7(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
CNS_8EAX_4BYTE(0xA7)
}
/*=================================================================================
=================================================================================*/
#define SBase 0xAC00
#define SCount 11172
#define LCount 19
#define VCount 21
#define TCount 28
#define NCount (VCount * TCount)
int uCnSAlways8BytesDecomposedHangul(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
uint16_t LIndex, VIndex, TIndex;
/* no 8 bytes, not in a4 range, or the first 2 byte are not a4d4 */
if((inbuflen < 8) || (0xa4 != in[0]) || (0xd4 != in[1]) ||
(0xa4 != in[2] ) || (0xa4 != in[4]) || (0xa4 != in[6]))
return 0;
/* Compute LIndex */
if((in[3] < 0xa1) || (in[3] > 0xbe)) { /* illegal leading consonant */
return 0;
}
else {
static const uint8_t lMap[] = {
/* A1 A2 A3 A4 A5 A6 A7 */
0, 1,0xff, 2,0xff,0xff, 3,
/* A8 A9 AA AB AC AD AE AF */
4, 5,0xff,0xff,0xff,0xff,0xff,0xff,
/* B0 B1 B2 B3 B4 B5 B6 B7 */
0xff, 6, 7, 8,0xff, 9, 10, 11,
/* B8 B9 BA BB BC BD BE */
12, 13, 14, 15, 16, 17, 18
};
LIndex = lMap[in[3] - 0xa1];
if(0xff == (0xff & LIndex))
return 0;
}
/* Compute VIndex */
if((in[5] < 0xbf) || (in[5] > 0xd3)) { /* illegal medial vowel */
return 0;
}
else {
VIndex = in[5] - 0xbf;
}
/* Compute TIndex */
if(0xd4 == in[7])
{
TIndex = 0;
}
else if((in[7] < 0xa1) || (in[7] > 0xbe)) {/* illegal trailing consonant */
return 0;
}
else {
static const uint8_t tMap[] = {
/* A1 A2 A3 A4 A5 A6 A7 */
1, 2, 3, 4, 5, 6, 7,
/* A8 A9 AA AB AC AD AE AF */
0xff, 8, 9, 10, 11, 12, 13, 14,
/* B0 B1 B2 B3 B4 B5 B6 B7 */
15, 16, 17,0xff, 18, 19, 20, 21,
/* B8 B9 BA BB BC BD BE */
22,0xff, 23, 24, 25, 26, 27
};
TIndex = tMap[in[7] - 0xa1];
if(0xff == (0xff & TIndex))
return 0;
}
*inscanlen = 8;
/* the following line is from Unicode 2.0 page 3-13 item 5 */
*out = ( LIndex * VCount + VIndex) * TCount + TIndex + SBase;
return 1;
}
/*=================================================================================
=================================================================================*/
int uCheckAndScanJohabHangul(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
/* since we don't have code to convert Johab to Unicode right now *
* make this part of code #if 0 to save space until we fully test it */
if(inbuflen < 2)
return 0;
else {
/*
* See Table 4-45 Johab Encoding's Five-Bit Binary Patterns in page 183
* of "CJKV Information Processing" for details
*/
static const uint8_t lMap[32]={ /* totaly 19 */
0xff,0xff,0, 1, 2, 3, 4, 5, /* 0-7 */
6, 7, 8, 9, 10, 11, 12, 13, /* 8-15 */
14, 15, 16, 17, 18, 0xff,0xff,0xff, /* 16-23 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff /* 24-31 */
};
static const uint8_t vMap[32]={ /* totaly 21 */
0xff,0xff,0xff,0, 1, 2, 3, 4, /* 0-7 */
0xff,0xff,5, 6, 7, 8, 9, 10, /* 8-15 */
0xff,0xff,11, 12, 13, 14, 15, 16, /* 16-23 */
0xff,0xff,17, 18, 19, 20, 0xff,0xff /* 24-31 */
};
static const uint8_t tMap[32]={ /* totaly 29 */
0xff,0, 1, 2, 3, 4, 5, 6, /* 0-7 */
7, 8, 9, 10, 11, 12, 13, 14, /* 8-15 */
15, 16, 0xff,17, 18, 19, 20, 21, /* 16-23 */
22, 23, 24, 25, 26, 27, 0xff,0xff /* 24-31 */
};
uint16_t ch = (in[0] << 8) | in[1];
uint16_t LIndex, VIndex, TIndex;
if(0 == (0x8000 & ch))
return 0;
LIndex=lMap[(ch>>10)& 0x1F];
VIndex=vMap[(ch>>5) & 0x1F];
TIndex=tMap[(ch>>0) & 0x1F];
if((0xff==(LIndex)) ||
(0xff==(VIndex)) ||
(0xff==(TIndex)))
return 0;
/* the following line is from Unicode 2.0 page 3-13 item 5 */
*out = ( LIndex * VCount + VIndex) * TCount + TIndex + SBase;
*inscanlen = 2;
return 1;
}
}
int uCheckAndScanJohabSymbol(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
if(inbuflen < 2)
return 0;
else {
/*
* The following code are based on the Perl code lised under
* "Johab to ISO-2022-KR or EUC-KR Conversion" in page 1014 of
* "CJKV Information Processing" by Ken Lunde <lunde@adobe.com>
*
* sub johab2ks ($) { # Convert Johab to ISO-2022-KR
* my @johab = unpack("C*", $_[0]);
* my ($offset, $d8_off) = (0,0);
* my @out = ();
* while(($hi, $lo) = splice($johab, 0, 2)) {
* $offset = 1 if ($hi > 223 and $hi < 250);
* $d8_off = ($hi == 216 and ($lo > 160 ? 94 : 42));
* push (@out, (((($hi - ($hi < 223 ? 200 : 187)) << 1) -
* ($lo < 161 ? 1 : 0) + $offset) + $d8_off),
* $lo - ($lo < 161 ? ($lo > 126 ? 34 : 16) : 128 ));
* }
* return pack ("C*", @out);
* }
* additional comments from Ken Lunde
* $d8_off = ($hi == 216 and ($lo > 160 ? 94 : 42));
* has three possible return values:
* 0 if $hi is not equal to 216
* 94 if $hi is euqal to 216 and if $lo is greater than 160
* 42 if $hi is euqal to 216 and if $lo is not greater than 160
*/
unsigned char hi = in[0];
unsigned char lo = in[1];
uint16_t offset = (( hi > 223 ) && ( hi < 250)) ? 1 : 0;
uint16_t d8_off = 0;
if(216 == hi) {
if( lo > 160)
d8_off = 94;
else
d8_off = 42;
}
*out = (((((hi - ((hi < 223) ? 200 : 187)) << 1) -
(lo < 161 ? 1 : 0) + offset) + d8_off) << 8 ) |
(lo - ((lo < 161) ? ((lo > 126) ? 34 : 16) :
128));
*inscanlen = 2;
return 1;
}
}
int uCheckAndScan4BytesGB18030(
int32_t* state,
unsigned char *in,
uint16_t *out,
uint32_t inbuflen,
uint32_t* inscanlen
)
{
uint32_t data;
if(inbuflen < 4)
return 0;
if((in[0] < 0x81 ) || (0xfe < in[0]))
return 0;
if((in[1] < 0x30 ) || (0x39 < in[1]))
return 0;
if((in[2] < 0x81 ) || (0xfe < in[2]))
return 0;
if((in[3] < 0x30 ) || (0x39 < in[3]))
return 0;
data = (((((in[0] - 0x81) * 10 + (in[1] - 0x30)) * 126) +
(in[2] - 0x81)) * 10 ) + (in[3] - 0x30);
*inscanlen = 4;
*out = (data < 0x00010000) ? data : 0xFFFD;
return 1;
}
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