diff options
Diffstat (limited to 'src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp')
| -rw-r--r-- | src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp b/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp new file mode 100644 index 0000000..e5b6ba6 --- /dev/null +++ b/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp @@ -0,0 +1,240 @@ +/* -*- 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 Universal charset detector code. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 2001 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Shy Shalom <shooshX@gmail.com> + * + * Alternatively, the contents of this file may be used under the terms of + * either 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 <stdio.h> +#include "prmem.h" + +#include "nsSBCharSetProber.h" +#include "nsSBCSGroupProber.h" + +#include "nsHebrewProber.h" + +nsSBCSGroupProber::nsSBCSGroupProber() +{ + mProbers[0] = new nsSingleByteCharSetProber(&Win1251Model); + mProbers[1] = new nsSingleByteCharSetProber(&Koi8rModel); + mProbers[2] = new nsSingleByteCharSetProber(&Latin5Model); + mProbers[3] = new nsSingleByteCharSetProber(&MacCyrillicModel); + mProbers[4] = new nsSingleByteCharSetProber(&Ibm866Model); + mProbers[5] = new nsSingleByteCharSetProber(&Ibm855Model); + mProbers[6] = new nsSingleByteCharSetProber(&ISO_8859_7greekModel); + mProbers[7] = new nsSingleByteCharSetProber(&WINDOWS_1253greekModel); + mProbers[8] = new nsSingleByteCharSetProber(&Latin5BulgarianModel); + mProbers[9] = new nsSingleByteCharSetProber(&Win1251BulgarianModel); + mProbers[10] = new nsSingleByteCharSetProber(&TIS620ThaiModel); + + nsHebrewProber *hebprober = new nsHebrewProber(); + // Notice: Any change in these indexes - 10,11,12 must be reflected + // in the code below as well. + mProbers[11] = hebprober; + mProbers[12] = new nsSingleByteCharSetProber(&Win1255Model, PR_FALSE, hebprober); // Logical Hebrew + mProbers[13] = new nsSingleByteCharSetProber(&Win1255Model, PR_TRUE, hebprober); // Visual Hebrew + // Tell the Hebrew prober about the logical and visual probers + if (mProbers[11] && mProbers[12] && mProbers[13]) // all are not null + { + hebprober->SetModelProbers(mProbers[12], mProbers[13]); + } + else // One or more is null. avoid any Hebrew probing, null them all + { + for (PRUint32 i = 11; i <= 13; ++i) + { + delete mProbers[i]; + mProbers[i] = 0; + } + } + + mProbers[14] = new nsSingleByteCharSetProber(&Latin2HungarianModel); + mProbers[15] = new nsSingleByteCharSetProber(&Win1250HungarianModel); + mProbers[16] = new nsSingleByteCharSetProber(&WINDOWS_1252frenchModel); + mProbers[17] = new nsSingleByteCharSetProber(&WINDOWS_1252germanModel); + mProbers[18] = new nsSingleByteCharSetProber(&WINDOWS_1252swedishModel); + mProbers[19] = new nsSingleByteCharSetProber(&ISO_8859_9turkishModel); + mProbers[20] = new nsSingleByteCharSetProber(&WINDOWS_1252finnishModel); + mProbers[21] = new nsSingleByteCharSetProber(&windows_1252spanishModel); + mProbers[22] = new nsSingleByteCharSetProber(&iso_8859_2czechModel); + mProbers[23] = new nsSingleByteCharSetProber(&iso_8859_2polishModel); + + Reset(); +} + +nsSBCSGroupProber::~nsSBCSGroupProber() +{ + for (PRUint32 i = 0; i < NUM_OF_SBCS_PROBERS; i++) + { + delete mProbers[i]; + } +} + + +const char* nsSBCSGroupProber::GetCharSetName() +{ + //if we have no answer yet + if (mBestGuess == -1) + { + GetConfidence(); + //no charset seems positive + if (mBestGuess == -1) + //we will use default. + mBestGuess = 0; + } + return mProbers[mBestGuess]->GetCharSetName(); +} + +void nsSBCSGroupProber::Reset(void) +{ + mActiveNum = 0; + for (PRUint32 i = 0; i < NUM_OF_SBCS_PROBERS; i++) + { + if (mProbers[i]) // not null + { + mProbers[i]->Reset(); + mIsActive[i] = PR_TRUE; + ++mActiveNum; + } + else + mIsActive[i] = PR_FALSE; + } + mBestGuess = -1; + mState = eDetecting; +} + + +nsProbingState nsSBCSGroupProber::HandleData(const char* aBuf, PRUint32 aLen) +{ + nsProbingState st; + PRUint32 i; + char *newBuf1 = 0; + PRUint32 newLen1 = 0; + char *newBuf2 = 0; + PRUint32 newLen2 = 0; + + if (!FilterWithoutEnglishLetters(aBuf, aLen, &newBuf1, newLen1)) + goto done; + if (!FilterWithEnglishLetters(aBuf, aLen, &newBuf2, newLen2)) + goto done; + + if (newLen1 == 0) + goto done; // Nothing to see here, move on. + + for (i = 0; i < NUM_OF_SBCS_PROBERS; i++) + { + if (!mIsActive[i]) + continue; + if (mProbers[i]->KeepEnglishLetters()) { + st = mProbers[i]->HandleData(newBuf2, newLen2); + } + else + { + st = mProbers[i]->HandleData(newBuf1, newLen1); + } + if (st == eFoundIt) + { + mBestGuess = i; + mState = eFoundIt; + break; + } + else if (st == eNotMe) + { + mIsActive[i] = PR_FALSE; + mActiveNum--; + if (mActiveNum <= 0) + { + mState = eNotMe; + break; + } + } + } + +done: + PR_FREEIF(newBuf1); + PR_FREEIF(newBuf2); + + return mState; +} + +float nsSBCSGroupProber::GetConfidence(void) +{ + PRUint32 i; + float bestConf = 0.0, cf; + + switch (mState) + { + case eFoundIt: + return (float)0.99; //sure yes + case eNotMe: + return (float)0.01; //sure no + default: + for (i = 0; i < NUM_OF_SBCS_PROBERS; i++) + { + if (!mIsActive[i]) + continue; + cf = mProbers[i]->GetConfidence(); + if (bestConf < cf) + { + bestConf = cf; + mBestGuess = i; + } + } + } + return bestConf; +} + +#ifdef DEBUG_chardet +void nsSBCSGroupProber::DumpStatus() +{ + PRUint32 i; + float cf; + + cf = GetConfidence(); + printf(" SBCS Group Prober --------begin status \r\n"); + for (i = 0; i < NUM_OF_SBCS_PROBERS; i++) + { + if (!mIsActive[i]) + printf(" inactive: [%s] [%s](i.e. confidence is too low).\r\n", + mProbers[i]? mProbers[i]->GetCharSetName() : "UNSET", + mProbers[i]? mProbers[i]->GetLangName() : "UNSET" + ); + else + mProbers[i]->DumpStatus(); + } + printf(" SBCS Group found best match [%s] [%s] confidence %f.\r\n", + mProbers[mBestGuess]->GetCharSetName(), + mProbers[mBestGuess]->GetLangName(), + cf); +} +#endif |