michael@0: /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: 
michael@0: #include "nsEscCharsetProber.h"
michael@0: #include "nsUniversalDetector.h"
michael@0: 
michael@0: nsEscCharSetProber::nsEscCharSetProber(uint32_t aLanguageFilter)
michael@0: {
michael@0:   for (uint32_t i = 0; i < NUM_OF_ESC_CHARSETS; i++)
michael@0:     mCodingSM[i] = nullptr;
michael@0:   if (aLanguageFilter & NS_FILTER_CHINESE_SIMPLIFIED) 
michael@0:   {
michael@0:     mCodingSM[0] = new nsCodingStateMachine(&HZSMModel);
michael@0:     mCodingSM[1] = new nsCodingStateMachine(&ISO2022CNSMModel);
michael@0:   }
michael@0:   if (aLanguageFilter & NS_FILTER_JAPANESE)
michael@0:     mCodingSM[2] = new nsCodingStateMachine(&ISO2022JPSMModel);
michael@0:   if (aLanguageFilter & NS_FILTER_KOREAN)
michael@0:     mCodingSM[3] = new nsCodingStateMachine(&ISO2022KRSMModel);
michael@0:   mActiveSM = NUM_OF_ESC_CHARSETS;
michael@0:   mState = eDetecting;
michael@0:   mDetectedCharset = nullptr;
michael@0: }
michael@0: 
michael@0: nsEscCharSetProber::~nsEscCharSetProber(void)
michael@0: {
michael@0:   for (uint32_t i = 0; i < NUM_OF_ESC_CHARSETS; i++)
michael@0:     delete mCodingSM[i];
michael@0: }
michael@0: 
michael@0: void nsEscCharSetProber::Reset(void)
michael@0: {
michael@0:   mState = eDetecting;
michael@0:   for (uint32_t i = 0; i < NUM_OF_ESC_CHARSETS; i++)
michael@0:     if (mCodingSM[i])
michael@0:       mCodingSM[i]->Reset();
michael@0:   mActiveSM = NUM_OF_ESC_CHARSETS;
michael@0:   mDetectedCharset = nullptr;
michael@0: }
michael@0: 
michael@0: nsProbingState nsEscCharSetProber::HandleData(const char* aBuf, uint32_t aLen)
michael@0: {
michael@0:   nsSMState codingState;
michael@0:   int32_t j;
michael@0:   uint32_t i;
michael@0: 
michael@0:   for ( i = 0; i < aLen && mState == eDetecting; i++)
michael@0:   {
michael@0:     for (j = mActiveSM-1; j>= 0; j--)
michael@0:     {
michael@0:       if (mCodingSM[j])
michael@0:       {
michael@0:         codingState = mCodingSM[j]->NextState(aBuf[i]);
michael@0:         if (codingState == eItsMe)
michael@0:         {
michael@0:           mState = eFoundIt;
michael@0:           mDetectedCharset = mCodingSM[j]->GetCodingStateMachine();
michael@0:           return mState;
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return mState;
michael@0: }
michael@0: