summaryrefslogtreecommitdiffstats
path: root/khtml/misc/decoder.cpp
diff options
context:
space:
mode:
authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commitce4a32fe52ef09d8f5ff1dd22c001110902b60a2 (patch)
tree5ac38a06f3dde268dc7927dc155896926aaf7012 /khtml/misc/decoder.cpp
downloadtdelibs-ce4a32fe52ef09d8f5ff1dd22c001110902b60a2.tar.gz
tdelibs-ce4a32fe52ef09d8f5ff1dd22c001110902b60a2.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'khtml/misc/decoder.cpp')
-rw-r--r--khtml/misc/decoder.cpp790
1 files changed, 790 insertions, 0 deletions
diff --git a/khtml/misc/decoder.cpp b/khtml/misc/decoder.cpp
new file mode 100644
index 000000000..56f68b429
--- /dev/null
+++ b/khtml/misc/decoder.cpp
@@ -0,0 +1,790 @@
+/*
+ This file is part of the KDE libraries
+
+ Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ Copyright (C) 2003 Dirk Mueller (mueller@kde.org)
+ Copyright (C) 2003 Apple Computer, Inc.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+//----------------------------------------------------------------------------
+//
+// KDE HTML Widget -- decoder for input stream
+
+#undef DECODE_DEBUG
+//#define DECODE_DEBUG
+
+#include <assert.h>
+
+#include "decoder.h"
+#include "guess_ja.h"
+
+using namespace khtml;
+
+#include "htmlhashes.h"
+
+#include <qregexp.h>
+#include <qtextcodec.h>
+
+#include <kglobal.h>
+#include <kcharsets.h>
+
+#include <ctype.h>
+#include <kdebug.h>
+#include <klocale.h>
+
+
+
+Decoder::Decoder()
+{
+ // latin1
+ m_codec = QTextCodec::codecForMib(4);
+ m_decoder = m_codec->makeDecoder();
+ enc = 0;
+ m_type = DefaultEncoding;
+ body = false;
+ beginning = true;
+ visualRTL = false;
+ m_autoDetectLanguage = SemiautomaticDetection;
+ kc = NULL;
+}
+
+Decoder::~Decoder()
+{
+ delete m_decoder;
+ if (kc)
+ delete kc;
+}
+
+void Decoder::setEncoding(const char *_encoding, EncodingType type)
+{
+#ifdef DECODE_DEBUG
+ kdDebug(6005) << "setEncoding " << _encoding << " " << type << endl;
+#endif
+ enc = _encoding;
+#ifdef DECODE_DEBUG
+ kdDebug(6005) << "old encoding is:" << m_codec->name() << endl;
+#endif
+ enc = enc.lower();
+#ifdef DECODE_DEBUG
+ kdDebug(6005) << "requesting:" << enc << endl;
+#endif
+ if(enc.isNull() || enc.isEmpty())
+ return;
+
+#ifdef APPLE_CHANGES
+ QTextCodec *codec = (type == EncodingFromMetaTag || type == EncodingFromXMLHeader)
+ ? QTextCodec::codecForNameEightBitOnly(enc)
+ : QTextCodec::codecForName(enc);
+ if (codec) {
+ enc = codec->name();
+ visualRTL = codec->usesVisualOrdering();
+ }
+#else
+ if(enc == "visual") // hebrew visually ordered
+ enc = "iso8859-8";
+ bool b;
+ QTextCodec *codec = KGlobal::charsets()->codecForName(enc, b);
+ if (!b)
+ codec = 0;
+
+ if (type == EncodingFromMetaTag || type == EncodingFromXMLHeader) {
+ //Sometimes the codec specified is absurd, i.e. UTF-16 despite
+ //us decoding a meta tag as ASCII. In that case, ignore it.
+ if (codec &&
+ (codec->mibEnum() == 1000)) //UTF16 or similar.
+ codec = 0;
+ }
+
+ if (codec && codec->mibEnum() == 11) {
+ //We do NOT want to use Qt's QHebrewCodec, since it tries to reorder itself.
+ codec = QTextCodec::codecForName("iso8859-8-i");
+
+ // visually ordered unless one of the following
+ if( !(enc == "iso-8859-8-i" || enc == "iso_8859-8-i"
+ || enc == "csiso88598i" || enc == "logical") )
+ visualRTL = true;
+ }
+#endif
+
+ if( codec ) { // in case the codec didn't exist, we keep the old one (fixes some sites specifying invalid codecs)
+ m_codec = codec;
+ m_type = type;
+ delete m_decoder;
+ m_decoder = m_codec->makeDecoder();
+ }
+
+#ifdef DECODE_DEBUG
+ kdDebug(6005) << "Decoder::encoding used is" << m_codec->name() << endl;
+#endif
+}
+
+const char *Decoder::encoding() const
+{
+ return enc;
+}
+
+// Other browsers allow comments in the head section, so we need to also.
+// It's important not to look for tags inside the comments.
+static void skipComment(const char *&ptr, const char *pEnd)
+{
+ const char *p = ptr;
+ // Allow <!-->; other browsers do.
+ if (*p == '>') {
+ p++;
+ } else {
+ while (p != pEnd) {
+ if (*p == '-') {
+ // This is the real end of comment, "-->".
+ if (p[1] == '-' && p[2] == '>') {
+ p += 3;
+ break;
+ }
+ // This is the incorrect end of comment that other browsers allow, "--!>".
+ if (p[1] == '-' && p[2] == '!' && p[3] == '>') {
+ p += 4;
+ break;
+ }
+ }
+ p++;
+ }
+ }
+ ptr = p;
+}
+
+// Returns the position of the encoding string.
+static int findXMLEncoding(const QCString &str, int &encodingLength)
+{
+ int len = str.length();
+
+ int pos = str.find("encoding");
+ if (pos == -1)
+ return -1;
+ pos += 8;
+
+ // Skip spaces and stray control characters.
+ while (pos < len && str[pos] <= ' ')
+ ++pos;
+
+ //Bail out if nothing after
+ if (pos >= len)
+ return -1;
+
+ // Skip equals sign.
+ if (str[pos] != '=')
+ return -1;
+ ++pos;
+
+ // Skip spaces and stray control characters.
+ while (pos < len && str[pos] <= ' ')
+ ++pos;
+
+ //Bail out if nothing after
+ if (pos >= len)
+ return -1;
+
+ // Skip quotation mark.
+ char quoteMark = str[pos];
+ if (quoteMark != '"' && quoteMark != '\'')
+ return -1;
+ ++pos;
+
+ // Find the trailing quotation mark.
+ int end = pos;
+ while (end < len && str[end] != quoteMark)
+ ++end;
+
+ if (end >= len)
+ return -1;
+
+ encodingLength = end - pos;
+ return pos;
+}
+
+QString Decoder::decode(const char *data, int len)
+{
+ // Check for UTF-16 or UTF-8 BOM mark at the beginning, which is a sure sign of a Unicode encoding.
+ int bufferLength = buffer.length();
+ const int maximumBOMLength = 10;
+ if (beginning && bufferLength + len >= maximumBOMLength) {
+ // If the user has chosen utf16 we still need to auto-detect the endianness
+ if ((m_type != UserChosenEncoding) || (m_codec->mibEnum() == 1000)) {
+ // Extract the first three bytes.
+ // Handle the case where some of bytes are already in the buffer.
+ const uchar *udata = (const uchar *)data;
+ uchar c1 = bufferLength >= 1 ? (uchar)buffer[0] : *udata++;
+ uchar c2 = bufferLength >= 2 ? (uchar)buffer[1] : *udata++;
+ uchar c3 = bufferLength >= 3 ? (uchar)buffer[2] : *udata++;
+
+ // Check for the BOM
+ const char *autoDetectedEncoding;
+ if ((c1 == 0xFE && c2 == 0xFF) || (c1 == 0xFF && c2 == 0xFE)) {
+ autoDetectedEncoding = "ISO-10646-UCS-2";
+ } else if (c1 == 0xEF && c2 == 0xBB && c3 == 0xBF) {
+ autoDetectedEncoding = "UTF-8";
+ } else if (c1 == 0x00 || c2 == 0x00) {
+ uchar c4 = bufferLength >= 4 ? (uchar)buffer[3] : *udata++;
+ uchar c5 = bufferLength >= 5 ? (uchar)buffer[4] : *udata++;
+ uchar c6 = bufferLength >= 6 ? (uchar)buffer[5] : *udata++;
+ uchar c7 = bufferLength >= 7 ? (uchar)buffer[6] : *udata++;
+ uchar c8 = bufferLength >= 8 ? (uchar)buffer[7] : *udata++;
+ uchar c9 = bufferLength >= 9 ? (uchar)buffer[8] : *udata++;
+ uchar c10 = bufferLength >= 10 ? (uchar)buffer[9] : *udata++;
+ int nul_count_even = (c2 != 0) + (c4 != 0) + (c6 != 0) + (c8 != 0) + (c10 != 0);
+ int nul_count_odd = (c1 != 0) + (c3 != 0) + (c5 != 0) + (c7 != 0) + (c9 != 0);
+ if ((nul_count_even == 0 && nul_count_odd == 5) ||
+ (nul_count_even == 5 && nul_count_odd == 0))
+ autoDetectedEncoding = "ISO-10646-UCS-2";
+ else
+ autoDetectedEncoding = 0;
+ } else {
+ autoDetectedEncoding = 0;
+ }
+
+ // If we found a BOM, use the encoding it implies.
+ if (autoDetectedEncoding != 0) {
+ m_type = AutoDetectedEncoding;
+ m_codec = QTextCodec::codecForName(autoDetectedEncoding);
+ assert(m_codec);
+ enc = m_codec->name();
+ delete m_decoder;
+ m_decoder = m_codec->makeDecoder();
+ if (m_codec->mibEnum() == 1000 && c2 == 0x00)
+ {
+ // utf16LE, we need to put the decoder in LE mode
+ char reverseUtf16[3] = {0xFF, 0xFE, 0x00};
+ m_decoder->toUnicode(reverseUtf16, 2);
+ }
+ }
+ }
+ beginning = false;
+ }
+
+ // this is not completely efficient, since the function might go
+ // through the html head several times...
+
+ bool lookForMetaTag = m_type == DefaultEncoding && !body;
+
+ if (lookForMetaTag) {
+#ifdef DECODE_DEBUG
+ kdDebug(6005) << "looking for charset definition" << endl;
+#endif
+ { // extra level of braces to keep indenting matching original for better diff'ing
+#ifdef APPLE_CHANGES
+ buffer.append(data, len);
+#else
+ if(m_codec->mibEnum() != 1000) { // utf16
+ // replace '\0' by spaces, for buggy pages
+ char *d = const_cast<char *>(data);
+ int i = len - 1;
+ while(i >= 0) {
+ if(d[i] == 0) d[i] = ' ';
+ i--;
+ }
+ }
+ buffer += QCString(data, len+1);
+#endif
+ // we still don't have an encoding, and are in the head
+ // the following tags are allowed in <head>:
+ // SCRIPT|STYLE|META|LINK|OBJECT|TITLE|BASE
+ int invalid = 0; // invalid head tag count
+#ifdef APPLE_CHANGES
+ const char *ptr = buffer.latin1();
+ const char *pEnd = ptr + buffer.length();
+#else
+ const char *ptr = buffer.data();
+ const char *pEnd = ptr + buffer.length();
+#endif
+ while(ptr != pEnd)
+ {
+ if(*ptr == '<') {
+ bool end = false;
+ ptr++;
+
+ // Handle comments.
+ if (ptr[0] == '!' && ptr[1] == '-' && ptr[2] == '-') {
+ ptr += 3;
+ skipComment(ptr, pEnd);
+ continue;
+ }
+
+ // Handle XML header, which can have encoding in it.
+ if (ptr[0] == '?' && ptr[1] == 'x' && ptr[2] == 'm' && ptr[3] == 'l') {
+ const char *end = ptr;
+ while (*end != '>' && *end != '\0') end++;
+ if (*end == '\0')
+ break;
+ QCString str(ptr, end - ptr + 1); //+1 as it must include the \0 terminator
+ int len;
+ int pos = findXMLEncoding(str, len);
+ if (pos != -1) {
+ setEncoding(str.mid(pos, len), EncodingFromXMLHeader);
+ if (m_type == EncodingFromXMLHeader)
+ goto found;
+ }
+ }
+
+ if(*ptr == '/') ptr++, end=true;
+ char tmp[20];
+ int len = 0;
+ while (
+ ((*ptr >= 'a') && (*ptr <= 'z') ||
+ (*ptr >= 'A') && (*ptr <= 'Z') ||
+ (*ptr >= '0') && (*ptr <= '9'))
+ && len < 19 )
+ {
+ tmp[len] = tolower( *ptr );
+ ptr++;
+ len++;
+ }
+ tmp[len] = 0;
+ int id = khtml::getTagID(tmp, len);
+ if(end) id += ID_CLOSE_TAG;
+
+ switch( id ) {
+ case ID_META:
+ {
+ // found a meta tag...
+ //ptr += 5;
+ const char * end = ptr;
+ while(*end != '>' && *end != '\0') end++;
+ if ( *end == '\0' ) break;
+ QCString str( ptr, (end-ptr)+1);
+ str = str.lower();
+ int pos = 0;
+ //if( (pos = str.find("http-equiv", pos)) == -1) break;
+ //if( (pos = str.find("content-type", pos)) == -1) break;
+ while( pos < ( int ) str.length() ) {
+ if( (pos = str.find("charset", pos)) == -1) break;
+ pos += 7;
+ // skip whitespace..
+ while( pos < (int)str.length() && str[pos] <= ' ' ) pos++;
+ if ( pos == ( int )str.length()) break;
+ if ( str[pos++] != '=' ) continue;
+ while ( pos < ( int )str.length() &&
+ ( str[pos] <= ' ' ) || str[pos] == '=' || str[pos] == '"' || str[pos] == '\'')
+ pos++;
+
+ // end ?
+ if ( pos == ( int )str.length() ) break;
+ uint endpos = pos;
+ while( endpos < str.length() &&
+ (str[endpos] != ' ' && str[endpos] != '"' && str[endpos] != '\''
+ && str[endpos] != ';' && str[endpos] != '>') )
+ endpos++;
+ enc = str.mid(pos, endpos-pos);
+#ifdef DECODE_DEBUG
+ kdDebug( 6005 ) << "Decoder: found charset: " << enc.data() << endl;
+#endif
+ setEncoding(enc, EncodingFromMetaTag);
+ if( m_type == EncodingFromMetaTag ) goto found;
+
+ if ( endpos >= str.length() || str[endpos] == '/' || str[endpos] == '>' ) break;
+
+ pos = endpos + 1;
+ }
+ }
+ case ID_SCRIPT:
+ case (ID_SCRIPT+ID_CLOSE_TAG):
+ case ID_NOSCRIPT:
+ case (ID_NOSCRIPT+ID_CLOSE_TAG):
+ case ID_STYLE:
+ case (ID_STYLE+ID_CLOSE_TAG):
+ case ID_LINK:
+ case (ID_LINK+ID_CLOSE_TAG):
+ case ID_OBJECT:
+ case (ID_OBJECT+ID_CLOSE_TAG):
+ case ID_TITLE:
+ case (ID_TITLE+ID_CLOSE_TAG):
+ case ID_BASE:
+ case (ID_BASE+ID_CLOSE_TAG):
+ case ID_HTML:
+ case ID_HEAD:
+ case 0:
+ case (0 + ID_CLOSE_TAG ):
+ break;
+ case ID_BODY:
+ case (ID_HEAD+ID_CLOSE_TAG):
+ body = true;
+#ifdef DECODE_DEBUG
+ kdDebug( 6005 ) << "Decoder: no charset found. Id=" << id << endl;
+#endif
+ goto found;
+ default:
+ // Invalid tag in head. Let's be a little tolerant
+ invalid++;
+ if (invalid > 2) {
+ body = true;
+#ifdef DECODE_DEBUG
+ kdDebug( 6005 ) << "Decoder: no charset found. Id=" << id << endl;
+#endif
+ goto found;
+ }
+ }
+ }
+ else
+ ptr++;
+ }
+ if (invalid > 0) {
+ body = true;
+ goto found;
+ }
+ return QString::null;
+ }
+ }
+
+ found:
+ if (m_type == DefaultEncoding)
+ {
+#ifdef DECODE_DEBUG
+ kdDebug( 6005 ) << "Decoder: use auto-detect (" << strlen(data) << ")" << endl;
+#endif
+
+ switch ( m_autoDetectLanguage) {
+ case Decoder::Arabic:
+ enc = automaticDetectionForArabic( (const unsigned char*) data, len );
+ break;
+ case Decoder::Baltic:
+ enc = automaticDetectionForBaltic( (const unsigned char*) data, len );
+ break;
+ case Decoder::CentralEuropean:
+ enc = automaticDetectionForCentralEuropean( (const unsigned char*) data, len );
+ break;
+ case Decoder::Russian:
+ case Decoder::Ukrainian:
+ enc = automaticDetectionForCyrillic( (const unsigned char*) data, len, m_autoDetectLanguage );
+ break;
+ case Decoder::Greek:
+ enc = automaticDetectionForGreek( (const unsigned char*) data, len );
+ break;
+ case Decoder::Hebrew:
+ enc = automaticDetectionForHebrew( (const unsigned char*) data, len );
+ break;
+ case Decoder::Japanese:
+ enc = automaticDetectionForJapanese( (const unsigned char*) data, len );
+ break;
+ case Decoder::Turkish:
+ enc = automaticDetectionForTurkish( (const unsigned char*) data, len );
+ break;
+ case Decoder::WesternEuropean:
+ enc = automaticDetectionForWesternEuropean( (const unsigned char*) data, len );
+ break;
+ case Decoder::SemiautomaticDetection:
+ case Decoder::Chinese:
+ case Decoder::Korean:
+ case Decoder::Thai:
+ case Decoder::Unicode:
+ // huh. somethings broken in this code ### FIXME
+ enc = 0; //Reset invalid codec we tried, so we get back to latin1 fallback.
+ break;
+ }
+
+#ifdef DECODE_DEBUG
+ kdDebug( 6005 ) << "Decoder: auto detect encoding is " << enc.data() << endl;
+#endif
+ if ( !enc.isEmpty() )
+ setEncoding( enc.data(), AutoDetectedEncoding);
+ }
+
+
+ // if we still haven't found an encoding latin1 will be used...
+ // this is according to HTML4.0 specs
+ if (!m_codec)
+ {
+ if(enc.isEmpty()) enc = "iso8859-1";
+ m_codec = QTextCodec::codecForName(enc);
+ // be sure not to crash
+ if(!m_codec) {
+ m_codec = QTextCodec::codecForMib(4);
+ enc = "iso8859-1";
+ }
+ delete m_decoder;
+ m_decoder = m_codec->makeDecoder();
+ }
+ QString out;
+
+ if(!buffer.isEmpty() && enc != "ISO-10646-UCS-2") {
+ out = m_decoder->toUnicode(buffer, buffer.length());
+ buffer = "";
+ } else {
+ if(m_codec->mibEnum() != 1000) // utf16
+ {
+ // ### hack for a bug in QTextCodec. It cut's the input stream
+ // in case there are \0 in it. ZDNET has them inside... :-(
+ char *d = const_cast<char *>(data);
+ int i = len - 1;
+ while(i >= 0) {
+ if(*(d+i) == 0) *(d+i) = ' ';
+ i--;
+ }
+ }
+ out = m_decoder->toUnicode(data, len);
+ }
+
+ return out;
+}
+
+QString Decoder::flush() const
+{
+ return m_decoder->toUnicode(buffer, buffer.length());
+}
+
+QCString Decoder::automaticDetectionForArabic( const unsigned char* ptr, int size )
+{
+ for ( int i = 0; i < size; ++i ) {
+ if ( ( ptr[ i ] >= 0x80 && ptr[ i ] <= 0x9F ) || ptr[ i ] == 0xA1 || ptr[ i ] == 0xA2 || ptr[ i ] == 0xA3
+ || ( ptr[ i ] >= 0xA5 && ptr[ i ] <= 0xAB ) || ( ptr[ i ] >= 0xAE && ptr[ i ] <= 0xBA )
+ || ptr[ i ] == 0xBC || ptr[ i ] == 0xBD || ptr[ i ] == 0xBE || ptr[ i ] == 0xC0
+ || ( ptr[ i ] >= 0xDB && ptr[ i ] <= 0xDF ) || ( ptr[ i ] >= 0xF3 ) ) {
+ return "cp1256";
+ }
+ }
+
+ return "iso-8859-6";
+}
+
+QCString Decoder::automaticDetectionForBaltic( const unsigned char* ptr, int size )
+{
+ for ( int i = 0; i < size; ++i ) {
+ if ( ( ptr[ i ] >= 0x80 && ptr[ i ] <= 0x9E ) )
+ return "cp1257";
+
+ if ( ptr[ i ] == 0xA1 || ptr[ i ] == 0xA5 )
+ return "iso-8859-13";
+ }
+
+ return "iso-8859-13";
+}
+
+QCString Decoder::automaticDetectionForCentralEuropean(const unsigned char* ptr, int size )
+{
+ QCString charset = QCString();
+ for ( int i = 0; i < size; ++i ) {
+ if ( ptr[ i ] >= 0x80 && ptr[ i ] <= 0x9F ) {
+ if ( ptr[ i ] == 0x81 || ptr[ i ] == 0x83 || ptr[ i ] == 0x90 || ptr[ i ] == 0x98 )
+ return "ibm852";
+
+ if ( i + 1 > size )
+ return "cp1250";
+ else { // maybe ibm852 ?
+ charset = "cp1250";
+ continue;
+ }
+ }
+ if ( ptr[ i ] == 0xA5 || ptr[ i ] == 0xAE || ptr[ i ] == 0xBE || ptr[ i ] == 0xC3 || ptr[ i ] == 0xD0 || ptr[ i ] == 0xE3 || ptr[ i ] == 0xF0 ) {
+ if ( i + 1 > size )
+ return "iso-8859-2";
+ else { // maybe ibm852 ?
+ if ( charset.isNull() )
+ charset = "iso-8859-2";
+ continue;
+ }
+ }
+ }
+
+ if ( charset.isNull() )
+ charset = "iso-8859-3";
+
+ return charset.data();
+}
+
+QCString Decoder::automaticDetectionForCyrillic( const unsigned char* ptr, int size, AutoDetectLanguage _language )
+{
+ int koi_st=0;
+ int cp1251_st=0;
+
+// int koi_na=0;
+// int cp1251_na=0;
+
+ int koi_o_capital=0;
+ int koi_o=0;
+ int cp1251_o_capital=0;
+ int cp1251_o=0;
+
+ int koi_a_capital=0;
+ int koi_a=0;
+ int cp1251_a_capital=0;
+ int cp1251_a=0;
+
+ int koi_i_capital=0;
+ int koi_i=0;
+ int cp1251_i_capital=0;
+ int cp1251_i=0;
+
+ int cp1251_small_range=0;
+ int koi_small_range=0;
+ int ibm866_small_range=0;
+
+ int i;
+ for (i=1; (i<size) && (cp1251_small_range+koi_small_range<1000) ;++i)
+ {
+ if (ptr[i]>0xdf)
+ {
+ ++cp1251_small_range;
+
+ if (ptr[i]==0xee)//small o
+ ++cp1251_o;
+ else if (ptr[i]==0xe0)//small a
+ ++cp1251_a;
+ else if (ptr[i]==0xe8)//small i
+ ++cp1251_i;
+ else if (ptr[i]==0xf2 && ptr[i-1]==0xf1)//small st
+ ++cp1251_st;
+
+ else if (ptr[i]==0xef)
+ ++koi_o_capital;
+ else if (ptr[i]==0xe1)
+ ++koi_a_capital;
+ else if (ptr[i]==0xe9)
+ ++koi_i_capital;
+
+ }
+ else if (ptr[i]>0xbf)
+ {
+ ++koi_small_range;
+
+ if (ptr[i]==0xcf)//small o
+ ++koi_o;
+ else if (ptr[i]==0xc1)//small a
+ ++koi_a;
+ else if (ptr[i]==0xc9)//small i
+ ++koi_i;
+ else if (ptr[i]==0xd4 && ptr[i-1]==0xd3)//small st
+ ++koi_st;
+
+ else if (ptr[i]==0xce)
+ ++cp1251_o_capital;
+ else if (ptr[i]==0xc0)
+ ++cp1251_a_capital;
+ else if (ptr[i]==0xc8)
+ ++cp1251_i_capital;
+ }
+ else if (ptr[i]>0x9f && ptr[i]<0xaf) //first 16 letterz is 60%
+ ++ibm866_small_range;
+
+ }
+
+ if (ibm866_small_range>cp1251_small_range+koi_small_range)
+ return "ibm866"; //hehe this is a rare case :)
+
+ QCString koi_string = "koi8-u";
+ QCString cp1251_string = "cp1251";
+
+ if (cp1251_st==0 && koi_st>1)
+ return koi_string;
+ if (koi_st==0 && cp1251_st>1)
+ return cp1251_string;
+
+ if (cp1251_st>0 && koi_st>0)
+ {
+ if (cp1251_st/koi_st>2)
+ return cp1251_string;
+ else if (koi_st/cp1251_st>2)
+ return koi_string;
+ }
+
+ if (cp1251_a>koi_a && cp1251_o>koi_o && cp1251_i>koi_i)
+ return cp1251_string;
+ if (koi_a>cp1251_a && koi_o>cp1251_o && koi_i>cp1251_i)
+ return koi_string;
+
+ if (cp1251_a_capital>koi_a_capital && cp1251_o_capital>koi_o_capital && cp1251_i_capital>koi_i_capital)
+ return cp1251_string;
+ if (koi_a_capital>cp1251_a_capital && koi_o_capital>cp1251_o_capital && koi_i_capital>cp1251_i_capital)
+ return koi_string;
+
+ //fallback...
+ if (cp1251_small_range>koi_small_range)
+ return cp1251_string;
+ else
+ return koi_string;
+
+}
+
+QCString Decoder::automaticDetectionForGreek( const unsigned char* ptr, int size )
+{
+ for ( int i = 0; i < size; ++i ) {
+ if ( ptr[ i ] == 0x80 || ( ptr[ i ] >= 0x82 && ptr[ i ] <= 0x87 ) || ptr[ i ] == 0x89 || ptr[ i ] == 0x8B
+ || ( ptr[ i ] >= 0x91 && ptr[ i ] <= 0x97 ) || ptr[ i ] == 0x99 || ptr[ i ] == 0x9B || ptr[ i ] == 0xA4
+ || ptr[ i ] == 0xA5 || ptr[ i ] == 0xAE ) {
+ return "cp1253";
+ }
+ }
+
+ return "iso-8859-7";
+}
+
+QCString Decoder::automaticDetectionForHebrew( const unsigned char* ptr, int size )
+{
+ for ( int i = 0; i < size; ++i ) {
+ if ( ptr[ i ] == 0x80 || ( ptr[ i ] >= 0x82 && ptr[ i ] <= 0x89 ) || ptr[ i ] == 0x8B
+ || ( ptr[ i ] >= 0x91 && ptr[ i ] <= 0x99 ) || ptr[ i ] == 0x9B || ptr[ i ] == 0xA1 || ( ptr[ i ] >= 0xBF && ptr[ i ] <= 0xC9 )
+ || ( ptr[ i ] >= 0xCB && ptr[ i ] <= 0xD8 ) ) {
+ return "cp1255";
+ }
+
+ if ( ptr[ i ] == 0xDF )
+ return "iso-8859-8-i";
+ }
+
+ return "iso-8859-8-i";
+}
+
+QCString Decoder::automaticDetectionForJapanese( const unsigned char* ptr, int size )
+{
+ if (!kc)
+ kc = new JapaneseCode();
+
+ switch ( kc->guess_jp( (const char*)ptr, size ) ) {
+ case JapaneseCode::JIS:
+ return "jis7";
+ case JapaneseCode::EUC:
+ return "eucjp";
+ case JapaneseCode::SJIS:
+ return "sjis";
+ case JapaneseCode::UTF8:
+ return "utf8";
+ default:
+ break;
+ }
+
+ return "";
+}
+
+QCString Decoder::automaticDetectionForTurkish( const unsigned char* ptr, int size )
+{
+ for ( int i = 0; i < size; ++i ) {
+ if ( ptr[ i ] == 0x80 || ( ptr[ i ] >= 0x82 && ptr[ i ] <= 0x8C ) || ( ptr[ i ] >= 0x91 && ptr[ i ] <= 0x9C ) || ptr[ i ] == 0x9F ) {
+ return "cp1254";
+ }
+ }
+
+ return "iso-8859-9";
+}
+
+QCString Decoder::automaticDetectionForWesternEuropean( const unsigned char* ptr, int size )
+{
+ for ( int i = 0; i < size; ++i ) {
+ if ( ptr[ i ] >= 0x80 && ptr[ i ] <= 0x9F )
+ return "cp1252";
+ }
+
+ return "iso-8859-1"; //"iso-8859-15"; Which better at default ?
+}
+
+
+// -----------------------------------------------------------------------------
+#undef DECODE_DEBUG