/* -*- Mode: C++; tab-width: 2; 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 "nsUnicodeToISO2022JP.h"
#include "nsUCVJADll.h"
#include "nsUnicodeEncodeHelper.h"
//----------------------------------------------------------------------
// Global functions and data [declaration]
// Basic mapping from Hankaku to Zenkaku
// Nigori and Maru are taken care of outside this basic mapping
static const char16_t gBasicMapping[0x40] =
{
// 0xff60
0xff60,0x3002,0x300c,0x300d,0x3001,0x30fb,0x30f2,0x30a1,
// 0xff68
0x30a3,0x30a5,0x30a7,0x30a9,0x30e3,0x30e5,0x30e7,0x30c3,
// 0xff70
0x30fc,0x30a2,0x30a4,0x30a6,0x30a8,0x30aa,0x30ab,0x30ad,
// 0xff78
0x30af,0x30b1,0x30b3,0x30b5,0x30b7,0x30b9,0x30bb,0x30bd,
// 0xff80
0x30bf,0x30c1,0x30c4,0x30c6,0x30c8,0x30ca,0x30cb,0x30cc,
// 0xff88
0x30cd,0x30ce,0x30cf,0x30d2,0x30d5,0x30d8,0x30db,0x30de,
// 0xff90
0x30df,0x30e0,0x30e1,0x30e2,0x30e4,0x30e6,0x30e8,0x30e9,
// 0xff98
0x30ea,0x30eb,0x30ec,0x30ed,0x30ef,0x30f3,0x309b,0x309c
};
// Do we need to check for Nigori for the next unicode ?
#define NEED_TO_CHECK_NIGORI(u) (((0xff76<=(u))&&((u)<=0xff84))||((0xff8a<=(u))&&((u)<=0xff8e)))
// Do we need to check for Maru for the next unicode ?
#define NEED_TO_CHECK_MARU(u) ((0xff8a<=(u))&&((u)<=0xff8e))
// The unicode is in Katakana Hankaku block
#define IS_HANKAKU(u) ((0xff61 <= (u)) && ((u) <= 0xff9f))
#define IS_NIGORI(u) (0xff9e == (u))
#define IS_MARU(u) (0xff9f == (u))
#define NIGORI_MODIFIER 1
#define MARU_MODIFIER 2
static const uint16_t g_ufAsciiMapping [] = {
0x0001, 0x0004, 0x0005, 0x0008, 0x0000, 0x0000, 0x007F, 0x0000
};
#define SIZE_OF_ISO2022JP_TABLES 5
static const uint16_t * g_ufMappingTables[SIZE_OF_ISO2022JP_TABLES] = {
g_ufAsciiMapping, // ASCII ISOREG 6
g_uf0201GLMapping, // JIS X 0201-1976 ISOREG 14
g_uf0208Mapping, // JIS X 0208-1983 ISOREG 87
g_uf0208extMapping, // JIS X 0208 - cp932 ext
g_uf0208Mapping, // JIS X 0208-1978 ISOREG 42
};
static const uScanClassID g_ufScanClassIDs[SIZE_OF_ISO2022JP_TABLES] = {
u1ByteCharset, // ASCII ISOREG 6
u1ByteCharset, // JIS X 0201-1976 ISOREG 14
u2BytesCharset, // JIS X 0208-1983 ISOREG 87
u2BytesCharset, // JIS X 0208- cp932 ext
u2BytesCharset, // JIS X 0208-1978 ISOREG 42
};
#define JIS_X_208_INDEX 2
//----------------------------------------------------------------------
// Class nsUnicodeToISO2022JP [implementation]
// worst case max length:
// 1 2 3 4 5 6 7 8
// ESC $ B XX XX ESC ( B
nsUnicodeToISO2022JP::nsUnicodeToISO2022JP()
: nsEncoderSupport(8)
{
Reset();
}
nsUnicodeToISO2022JP::~nsUnicodeToISO2022JP()
{
}
nsresult nsUnicodeToISO2022JP::ChangeCharset(int32_t aCharset,
char * aDest,
int32_t * aDestLength)
{
// both 2 and 3 generate the same escape sequence. 2 is for
// the standard JISx0208 table, and 3 is for theCP932 extensions
// therefore, we treat them as the same one.
if(((2 == aCharset) && ( 3 == mCharset)) ||
((3 == aCharset) && ( 2 == mCharset)) )
{
mCharset = aCharset;
}
if(aCharset == mCharset)
{
*aDestLength = 0;
return NS_OK;
}
if (*aDestLength < 3) {
*aDestLength = 0;
return NS_OK_UENC_MOREOUTPUT;
}
switch (aCharset) {
case 0: // ASCII ISOREG 6
aDest[0] = 0x1b;
aDest[1] = '(';
aDest[2] = 'B';
break;
case 1: // JIS X 0201-1976 ("Roman" set) ISOREG 14
aDest[0] = 0x1b;
aDest[1] = '(';
aDest[2] = 'J';
break;
case 2: // JIS X 0208-1983 ISOREG 87
case 3: // JIS X 0208-1983
// we currently use this for CP932 ext
aDest[0] = 0x1b;
aDest[1] = '$';
aDest[2] = 'B';
break;
case 4: // JIS X 0201-1978 ISOREG 87-
// we currently do not have a diff mapping for it.
aDest[0] = 0x1b;
aDest[1] = '$';
aDest[2] = '@';
break;
}
mCharset = aCharset;
*aDestLength = 3;
return NS_OK;
}
nsresult nsUnicodeToISO2022JP::ConvertHankaku(const char16_t * aSrc,
int32_t * aSrcLength,
char * aDest,
int32_t * aDestLength)
{
nsresult res = NS_OK;
const char16_t * src = aSrc;
const char16_t * srcEnd = aSrc + *aSrcLength;
char * dest = aDest;
char * destEnd = aDest + *aDestLength;
char16_t srcChar, tempChar;
int32_t bcr, bcw;
bcw = destEnd - dest;
res = ChangeCharset(JIS_X_208_INDEX, dest, &bcw);
dest += bcw;
if (res != NS_OK) {
return res;
}
while (src < srcEnd) {
srcChar = *src;
if (!IS_HANKAKU(srcChar)) {
break;
}
++src;
tempChar = gBasicMapping[(srcChar) - 0xff60];
if (src < srcEnd) {
// if the character could take a modifier, and the next char
// is a modifier, modify it and eat one char16_t
if (NEED_TO_CHECK_NIGORI(srcChar) && IS_NIGORI(*src)) {
tempChar += NIGORI_MODIFIER;
++src;
} else if (NEED_TO_CHECK_MARU(srcChar) && IS_MARU(*src)) {
tempChar += MARU_MODIFIER;
++src;
}
}
bcr = 1;
bcw = destEnd - dest;
res = nsUnicodeEncodeHelper::ConvertByTable(
&tempChar, &bcr, dest, &bcw, g_ufScanClassIDs[JIS_X_208_INDEX],
nullptr, (uMappingTable *) g_ufMappingTables[JIS_X_208_INDEX]);
dest += bcw;
if (res != NS_OK)
break;
}
*aDestLength = dest - aDest;
*aSrcLength = src - aSrc;
return res;
}
//----------------------------------------------------------------------
// Subclassing of nsTableEncoderSupport class [implementation]
NS_IMETHODIMP nsUnicodeToISO2022JP::ConvertNoBuffNoErr(
const char16_t * aSrc,
int32_t * aSrcLength,
char * aDest,
int32_t * aDestLength)
{
nsresult res = NS_OK;
const char16_t * src = aSrc;
const char16_t * srcEnd = aSrc + *aSrcLength;
char * dest = aDest;
char * destEnd = aDest + *aDestLength;
int32_t bcr, bcw;
int32_t i;
while (src < srcEnd) {
for (i=0; i< SIZE_OF_ISO2022JP_TABLES ; i++) {
bcr = 1;
bcw = destEnd - dest;
res = nsUnicodeEncodeHelper::ConvertByTable(src, &bcr, dest, &bcw,
g_ufScanClassIDs[i], nullptr,
(uMappingTable *) g_ufMappingTables[i]);
if (res != NS_ERROR_UENC_NOMAPPING) break;
}
if ( i>= SIZE_OF_ISO2022JP_TABLES) {
if (IS_HANKAKU(*src)) {
bcr = srcEnd - src;
bcw = destEnd - dest;
res = ConvertHankaku(src, &bcr, dest, &bcw);
dest += bcw;
src += bcr;
if (res == NS_OK) continue;
} else {
res = NS_ERROR_UENC_NOMAPPING;
src++;
}
}
if (res != NS_OK) break;
bcw = destEnd - dest;
res = ChangeCharset(i, dest, &bcw);
dest += bcw;
if (res != NS_OK) break;
bcr = srcEnd - src;
bcw = destEnd - dest;
res = nsUnicodeEncodeHelper::ConvertByTable(src, &bcr, dest, &bcw,
g_ufScanClassIDs[i], nullptr,
(uMappingTable *) g_ufMappingTables[i]);
src += bcr;
dest += bcw;
if ((res != NS_OK) && (res != NS_ERROR_UENC_NOMAPPING)) break;
if (res == NS_ERROR_UENC_NOMAPPING) src--;
}
*aSrcLength = src - aSrc;
*aDestLength = dest - aDest;
return res;
}
NS_IMETHODIMP nsUnicodeToISO2022JP::FinishNoBuff(char * aDest,
int32_t * aDestLength)
{
ChangeCharset(0, aDest, aDestLength);
return NS_OK;
}
NS_IMETHODIMP nsUnicodeToISO2022JP::Reset()
{
mCharset = 0;
return nsEncoderSupport::Reset();
}