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gecko/intl/uconv/ucvcn/nsISO2022CNToUnicode.cpp
Ehsan Akhgari e55dbc5e2e Bug 921472 - Minimize the #includes in intl/; r=smontagu 
--HG--
extra : rebase_source : 09da2f7e2e4602e2572a64f45828a660aefe5ec2
2013-09-27 12:45:04 -04:00

579 lines
17 KiB
C++
Raw Blame History

/* -*- 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 "nsISO2022CNToUnicode.h"
#include "nsUCSupport.h"
#include "nsICharsetConverterManager.h"
#include "nsServiceManagerUtils.h"
static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
NS_IMETHODIMP nsISO2022CNToUnicode::GB2312_To_Unicode(unsigned char *aSrc, int32_t aSrcLength, PRUnichar * aDest, int32_t * 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, int32_t aSrcLength, PRUnichar * aDest, int32_t * 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, int32_t * aSrcLen, PRUnichar * aDest, int32_t * 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;
int32_t 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];
int32_t 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];
int32_t 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];
int32_t 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];
int32_t 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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