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gecko/intl/uconv/ucvcn/nsISO2022CNToUnicode.cpp

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ervin Yan <ervin.yan@sun.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsISO2022CNToUnicode.h"
#include "nsUCSupport.h"
#include "nsICharsetConverterManager.h"
#include "nsIServiceManager.h"
static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
NS_IMETHODIMP nsISO2022CNToUnicode::GB2312_To_Unicode(unsigned char *aSrc, PRInt32 aSrcLength, PRUnichar * aDest, PRInt32 * aDestLength)
{
nsresult rv;
if(!mGB2312_Decoder) {
// creating a delegate converter (GB2312)
nsCOMPtr<nsICharsetConverterManager> ccm =
do_GetService(kCharsetConverterManagerCID, &rv);
if(NS_FAILED(rv))
return NS_ERROR_UNEXPECTED;
rv = ccm->GetUnicodeDecoderRaw("GB2312", getter_AddRefs(mGB2312_Decoder));
if(NS_FAILED(rv))
return NS_ERROR_UNEXPECTED;
}
if(!mGB2312_Decoder) // failed creating a delegate converter
return NS_ERROR_UNEXPECTED;
rv = mGB2312_Decoder->Convert((const char *)aSrc, &aSrcLength, aDest, aDestLength);
return rv;
}
NS_IMETHODIMP nsISO2022CNToUnicode::EUCTW_To_Unicode(unsigned char *aSrc, PRInt32 aSrcLength, PRUnichar * aDest, PRInt32 * aDestLength)
{
nsresult rv;
if(!mEUCTW_Decoder) {
// creating a delegate converter (x-euc-tw)
nsCOMPtr<nsICharsetConverterManager> ccm =
do_GetService(kCharsetConverterManagerCID, &rv);
if(NS_FAILED(rv))
return NS_ERROR_UNEXPECTED;
rv = ccm->GetUnicodeDecoderRaw("x-euc-tw", getter_AddRefs(mEUCTW_Decoder));
if(NS_FAILED(rv))
return NS_ERROR_UNEXPECTED;
}
if(!mEUCTW_Decoder) // failed creating a delegate converter
return NS_ERROR_UNEXPECTED;
rv = mEUCTW_Decoder->Convert((const char *)aSrc, &aSrcLength, aDest, aDestLength);
return(rv);
}
NS_IMETHODIMP nsISO2022CNToUnicode::Convert(const char * aSrc, PRInt32 * aSrcLen, PRUnichar * aDest, PRInt32 * aDestLen)
{
const unsigned char * srcEnd = (unsigned char *)aSrc + *aSrcLen;
const unsigned char * src = (unsigned char *) aSrc;
PRUnichar* destEnd = aDest + *aDestLen;
PRUnichar* dest = aDest;
nsresult rv;
PRInt32 aLen;
while ((src < srcEnd))
{
switch (mState)
{
case eState_ASCII:
if(ESC == *src) {
mState = eState_ESC;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_ESC: // ESC
if('$' == *src) {
mState = eState_ESC_24;
} else {
if (CHECK_OVERRUN(dest, destEnd, 2))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_ESC_24: // ESC $
if(')' == *src) {
mState = eState_ESC_24_29;
} else if('*' == *src) {
mState = eState_ESC_24_2A;
} else if('+' == *src) {
mState = eState_ESC_24_2B;
} else {
if (CHECK_OVERRUN(dest, destEnd, 3))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_ESC_24_29: // ESC $ )
if('A' == *src) {
mState = eState_ESC_24_29_A;
} else if('G' == *src) {
mState = eState_ESC_24_29_G;
} else {
if (CHECK_OVERRUN(dest, destEnd, 4))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) ')';
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_ESC_24_29_A: // ESC $ ) A
if(SO == *src) {
mState = eState_GB2312_1980;
mRunLength = 0;
} else {
if (CHECK_OVERRUN(dest, destEnd, 5))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) ')';
*dest++ = (PRUnichar) 'A';
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_GB2312_1980: // ESC $ ) A SO
if(SI == *src) { // Shift-In (SI)
mState = eState_ESC_24_29_A_SO_SI;
if (mRunLength == 0) {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = 0xFFFD;
}
mRunLength = 0;
} else if(ESC == *src) {
mState = eState_ESC;
} else {
if(0x20 < *src && *src < 0x7f) {
mData = *src;
mState = eState_GB2312_1980_2ndbyte;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
}
}
break;
case eState_GB2312_1980_2ndbyte: // ESC $ ) A SO
if(0x20 < *src && *src < 0x7f) {
unsigned char gb[2];
PRInt32 gbLen = 2;
gb[0] = mData | 0x80;
gb[1] = *src | 0x80;
aLen = destEnd - dest;
rv = GB2312_To_Unicode(gb, gbLen, dest, &aLen);
++mRunLength;
if(rv == NS_OK_UDEC_MOREOUTPUT) {
goto error1;
} else if(NS_FAILED(rv)) {
goto error2;
}
dest += aLen;
} else {
if (CHECK_OVERRUN(dest, destEnd, 2))
goto error1;
*dest++ = (PRUnichar) mData;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
}
mState = eState_GB2312_1980;
break;
case eState_ESC_24_29_A_SO_SI: // ESC $ ) A SO SI
if(SO == *src) {
mState = eState_GB2312_1980;
mRunLength = 0;
} else if(ESC == *src) {
mState = eState_ESC;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ESC_24_29_A_SO_SI;
}
break;
case eState_ESC_24_29_G: // ESC $ ) G
if(SO == *src) {
mState = eState_CNS11643_1;
mRunLength = 0;
} else {
if (CHECK_OVERRUN(dest, destEnd, 5))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) ')';
*dest++ = (PRUnichar) 'G';
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_CNS11643_1: // ESC $ ) G SO
if(SI == *src) { // Shift-In (SI)
mState = eState_ESC_24_29_G_SO_SI;
if (mRunLength == 0) {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = 0xFFFD;
}
mRunLength = 0;
} else if(ESC == *src) {
mState = eState_ESC;
} else {
if(0x20 < *src && *src < 0x7f) {
mData = *src;
mState = eState_CNS11643_1_2ndbyte;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
}
}
break;
case eState_CNS11643_1_2ndbyte: // ESC $ ) G SO
if(0x20 < *src && *src < 0x7f) {
unsigned char cns[4];
PRInt32 cnsLen = 2;
cns[0] = mData | 0x80;
cns[1] = *src | 0x80;
aLen = destEnd - dest;
rv = EUCTW_To_Unicode(cns, cnsLen, dest, &aLen);
++mRunLength;
if(rv == NS_OK_UDEC_MOREOUTPUT) {
goto error1;
} else if(NS_FAILED(rv)) {
goto error2;
}
dest += aLen;
} else {
if (CHECK_OVERRUN(dest, destEnd, 2))
goto error1;
*dest++ = (PRUnichar) mData;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
}
mState = eState_CNS11643_1;
break;
case eState_ESC_24_29_G_SO_SI: // ESC $ ) G SO SI
if(SO == *src) {
mState = eState_CNS11643_1;
mRunLength = 0;
} else if(ESC == *src) {
mState = eState_ESC;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ESC_24_29_G_SO_SI;
}
break;
case eState_ESC_24_2A: // ESC $ *
if('H' == *src) {
mState = eState_ESC_24_2A_H;
} else {
if (CHECK_OVERRUN(dest, destEnd, 4))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) '*';
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_ESC_24_2A_H: // ESC $ * H
if(ESC == *src) {
mState = eState_ESC_24_2A_H_ESC;
} else {
if (CHECK_OVERRUN(dest, destEnd, 5))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) '*';
*dest++ = (PRUnichar) 'H';
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_ESC_24_2A_H_ESC: // ESC $ * H ESC
if(SS2 == *src) {
mState = eState_CNS11643_2;
mRunLength = 0;
} else if('$' == *src) {
mState = eState_ESC_24;
} else {
if (CHECK_OVERRUN(dest, destEnd, 6))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) '*';
*dest++ = (PRUnichar) 'H';
*dest++ = (PRUnichar) ESC;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_CNS11643_2: // ESC $ * H ESC SS2
if(SI == *src) { // Shift-In (SI)
mState = eState_ESC_24_2A_H_ESC_SS2_SI;
if (mRunLength == 0) {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = 0xFFFD;
}
mRunLength = 0;
} else if(ESC == *src) {
mState = eState_ESC_24_2A_H_ESC;
} else {
if(0x20 < *src && *src < 0x7f) {
mData = *src;
mState = eState_CNS11643_2_2ndbyte;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
}
}
break;
case eState_CNS11643_2_2ndbyte: // ESC $ * H ESC SS2
if(0x20 < *src && *src < 0x7f) {
unsigned char cns[4];
PRInt32 cnsLen = 4;
cns[0] = (unsigned char) MBYTE;
cns[1] = (unsigned char) (PMASK + 2);
cns[2] = mData | 0x80;
cns[3] = *src | 0x80;
aLen = destEnd - dest;
rv = EUCTW_To_Unicode(cns, cnsLen, dest, &aLen);
++mRunLength;
if(rv == NS_OK_UDEC_MOREOUTPUT) {
goto error1;
} else if(NS_FAILED(rv)) {
goto error2;
}
dest += aLen;
} else {
if (CHECK_OVERRUN(dest, destEnd, 2))
goto error1;
*dest++ = (PRUnichar) mData;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
}
mState = eState_CNS11643_2;
break;
case eState_ESC_24_2A_H_ESC_SS2_SI: // ESC $ * H ESC SS2 SI
if(ESC == *src) {
mState = eState_ESC_24_2A_H_ESC_SS2_SI_ESC;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ESC_24_2A_H_ESC_SS2_SI;
}
break;
case eState_ESC_24_2A_H_ESC_SS2_SI_ESC: // ESC $ * H ESC SS2 SI ESC
if(SS2 == *src) {
mState = eState_CNS11643_2;
mRunLength = 0;
} else if('$' == *src) {
mState = eState_ESC_24;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ESC_24_2A_H_ESC_SS2_SI;
}
break;
case eState_ESC_24_2B: // ESC $ +
if('I' <= *src && *src <= 'M') {
mState = eState_ESC_24_2B_I;
mPlaneID = *src - 'I' + 3;
} else {
if (CHECK_OVERRUN(dest, destEnd, 4))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) '+';
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_ESC_24_2B_I: // ESC $ + I
if(ESC == *src) {
mState = eState_ESC_24_2B_I_ESC;
} else {
if (CHECK_OVERRUN(dest, destEnd, 5))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) '+';
*dest++ = (PRUnichar) 'I' + mPlaneID - 3;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_ESC_24_2B_I_ESC: // ESC $ + I ESC
if(SS3 == *src) {
mState = eState_CNS11643_3;
mRunLength = 0;
} else if('$' == *src) {
mState = eState_ESC_24;
} else {
if (CHECK_OVERRUN(dest, destEnd, 6))
goto error1;
*dest++ = (PRUnichar) ESC;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) '+';
*dest++ = (PRUnichar) 'I' + mPlaneID - 3;
*dest++ = (PRUnichar) ESC;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ASCII;
}
break;
case eState_CNS11643_3: // ESC $ + I ESC SS3
if(SI == *src) { // Shift-In (SI)
mState = eState_ESC_24_2B_I_ESC_SS3_SI;
if (mRunLength == 0) {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = 0xFFFD;
}
mRunLength = 0;
} else if(ESC == *src) {
mState = eState_ESC_24_2B_I_ESC;
} else {
if(0x20 < *src && *src < 0x7f) {
mData = *src;
mState = eState_CNS11643_3_2ndbyte;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
}
}
break;
case eState_CNS11643_3_2ndbyte: // ESC $ + I ESC SS3
if(0x20 < *src && *src < 0x7f) {
unsigned char cns[4];
PRInt32 cnsLen = 4;
cns[0] = (unsigned char) MBYTE;
cns[1] = (unsigned char) (PMASK + mPlaneID);
cns[2] = mData | 0x80;
cns[3] = *src | 0x80;
aLen = destEnd - dest;
rv = EUCTW_To_Unicode(cns, cnsLen, dest, &aLen);
++mRunLength;
if(rv == NS_OK_UDEC_MOREOUTPUT) {
goto error1;
} else if(NS_FAILED(rv)) {
goto error2;
}
dest += aLen;
} else {
if (CHECK_OVERRUN(dest, destEnd, 2))
goto error1;
*dest++ = (PRUnichar) mData;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
}
mState = eState_CNS11643_3;
break;
case eState_ESC_24_2B_I_ESC_SS3_SI: // ESC $ + I ESC SS3 SI
if(ESC == *src) {
mState = eState_ESC_24_2B_I_ESC_SS3_SI_ESC;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ESC_24_2B_I_ESC_SS3_SI;
}
break;
case eState_ESC_24_2B_I_ESC_SS3_SI_ESC: // ESC $ + I ESC SS3 SI ESC
if(SS3 == *src) {
mState = eState_CNS11643_3;
mRunLength = 0;
} else if('$' == *src) {
mState = eState_ESC_24;
} else {
if (CHECK_OVERRUN(dest, destEnd, 1))
goto error1;
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
mState = eState_ESC_24_2B_I_ESC_SS3_SI;
}
break;
case eState_ERROR:
NS_NOTREACHED("unhandled case");
goto error2;
} // switch
src++;
}
*aDestLen = dest- aDest;
return NS_OK;
error1:
*aDestLen = dest-aDest;
*aSrcLen = src - (const unsigned char*)aSrc;
return NS_OK_UDEC_MOREOUTPUT;
error2:
*aSrcLen = src - (const unsigned char*)aSrc;
*aDestLen = dest-aDest;
mState = eState_ASCII;
return NS_ERROR_UNEXPECTED;
}
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