File indexing completed on 2024-04-28 03:53:03

 /*  -*- C++ -*-
     SPDX-FileCopyrightText: 1998 Netscape Communications Corporation <developer@mozilla.org>
 
     SPDX-License-Identifier: MIT
 */
 
 #include "nsEscCharsetProber.h"
 
 namespace kencodingprober
 {
 nsEscCharSetProber::nsEscCharSetProber(void)
 {
     mCodingSM[0] = new nsCodingStateMachine(&HZSMModel);
     mCodingSM[1] = new nsCodingStateMachine(&ISO2022CNSMModel);
     mCodingSM[2] = new nsCodingStateMachine(&ISO2022JPSMModel);
     mCodingSM[3] = new nsCodingStateMachine(&ISO2022KRSMModel);
     mActiveSM = NUM_OF_ESC_CHARSETS;
     mState = eDetecting;
     mDetectedCharset = nullptr;
 }
 
 nsEscCharSetProber::~nsEscCharSetProber(void)
 {
     for (unsigned int i = 0; i < NUM_OF_ESC_CHARSETS; i++) {
         delete mCodingSM[i];
     }
 }
 
 void nsEscCharSetProber::Reset(void)
 {
     mState = eDetecting;
     for (unsigned int i = 0; i < NUM_OF_ESC_CHARSETS; i++) {
         mCodingSM[i]->Reset();
     }
     mActiveSM = NUM_OF_ESC_CHARSETS;
     mDetectedCharset = nullptr;
 }
 
 nsProbingState nsEscCharSetProber::HandleData(const char *aBuf, unsigned int aLen)
 {
     nsSMState codingState;
     int j;
     unsigned int i;
 
     for (i = 0; i < aLen && mState == eDetecting; i++) {
         for (j = mActiveSM - 1; j >= 0; j--) {
             // byte is feed to all active state machine
             codingState = mCodingSM[j]->NextState(aBuf[i]);
             if (codingState == eError) {
                 // got negative answer for this state machine, make it inactive
                 mActiveSM--;
                 if (mActiveSM == 0) {
                     mState = eNotMe;
                     return mState;
                 } else if (j != (int)mActiveSM) {
                     nsCodingStateMachine *t;
                     t = mCodingSM[mActiveSM];
                     mCodingSM[mActiveSM] = mCodingSM[j];
                     mCodingSM[j] = t;
                 }
             } else if (codingState == eItsMe) {
                 mState = eFoundIt;
                 mDetectedCharset = mCodingSM[j]->GetCodingStateMachine();
                 return mState;
             }
         }
     }
 
     return mState;
 }
 }