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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
commit460c52653ab0dcca6f19a4f492ed2c5e4e963ab0 (patch)
tree67208f7c145782a7e90b123b982ca78d88cc2c87 /libksieve/parser/utf8validator.cpp
downloadtdepim-460c52653ab0dcca6f19a4f492ed2c5e4e963ab0.tar.gz
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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/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'libksieve/parser/utf8validator.cpp')
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diff --git a/libksieve/parser/utf8validator.cpp b/libksieve/parser/utf8validator.cpp
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+/* -*- c++ -*-
+ utf8validator.cpp
+
+ This file is part of KSieve,
+ the KDE internet mail/usenet news message filtering library.
+ Copyright (c) 2003 Marc Mutz <mutz@kde.org>
+
+ KSieve is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License, version 2, as
+ published by the Free Software Foundation.
+
+ KSieve 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of this program with any edition of
+ the Qt library by Trolltech AS, Norway (or with modified versions
+ of Qt that use the same license as Qt), and distribute linked
+ combinations including the two. You must obey the GNU General
+ Public License in all respects for all of the code used other than
+ Qt. If you modify this file, you may extend this exception to
+ your version of the file, but you are not obligated to do so. If
+ you do not wish to do so, delete this exception statement from
+ your version.
+*/
+
+#include <impl/utf8validator.h>
+
+#include <qglobal.h>
+#include <qcstring.h>
+
+static inline bool is8Bit( signed char ch ) {
+ return ch < 0;
+}
+
+static inline bool isUtf8TupelIndicator( unsigned char ch ) {
+ return (ch & 0xE0) == 0xC0; // 110x xxxx
+}
+
+static inline bool isUtf8OverlongTupel( unsigned char ch ) {
+ return (ch & 0xFE) == 0xC0;
+}
+
+static inline bool isUtf8TripleIndicator( unsigned char ch ) {
+ return (ch & 0xF0) == 0xE0; // 1110 xxxx
+}
+
+static inline bool isUtf8OverlongTriple( unsigned char ch1, unsigned char ch2 ) {
+ return (ch1 & 0xFF) == 0xE0 && (ch2 & 0xE0) == 0x80 ;
+}
+
+static inline bool isUtf8QuartetIndicator( unsigned char ch ) {
+ return (ch & 0xF8) == 0xF0; // 1111 0xxx
+}
+
+static inline bool isUtf8OverlongQuartet( unsigned char ch1, unsigned char ch2 ) {
+ return (ch1 & 0xFF) == 0xF0 && (ch2 & 0xF0) == 0x80 ;
+}
+
+static inline bool isUtf8QuintetIndicator( unsigned char ch ) {
+ return (ch & 0xFC) == 0xF8; // 1111 10xx
+}
+
+static inline bool isUtf8OverlongQuintet( unsigned char ch1, unsigned char ch2 ) {
+ return (ch1 & 0xFF) == 0xF8 && (ch2 & 0xF8) == 0x80 ;
+}
+
+static inline bool isUtf8SextetIndicator( unsigned char ch ) {
+ return (ch & 0xFE) == 0xFC; // 1111 110x
+}
+
+static inline bool isUtf8OverlongSextet( unsigned char ch1, unsigned char ch2 ) {
+ return (ch1 & 0xFF) == 0xFC && (ch2 & 0xFC) == 0x80 ;
+}
+
+static inline bool isUtf8Continuation( unsigned char ch ) {
+ return (ch & 0xC0) == 0x80;
+}
+
+bool KSieve::isValidUtf8( const char * s, unsigned int len ) {
+ for ( unsigned int i = 0 ; i < len ; ++i ) {
+ const unsigned char ch = s[i];
+ if ( !is8Bit( ch ) )
+ continue;
+ if ( isUtf8TupelIndicator( ch ) ) {
+ if ( len - i < 1 ) // too short
+ return false;
+ if ( isUtf8OverlongTupel( ch ) ) // not minimally encoded
+ return false;
+ if ( !isUtf8Continuation( s[i+1] ) ) // not followed by 10xx xxxx
+ return false;
+ i += 1;
+ } else if ( isUtf8TripleIndicator( ch ) ) {
+ if ( len - i < 2 ) // too short
+ return false;
+ if ( isUtf8OverlongTriple( ch, s[i+1] ) ) // not minimally encoded
+ return false;
+ if ( !isUtf8Continuation( s[i+2] ) ) // not followed by 10xx xxxx
+ return false;
+ i += 2;
+ } else if ( isUtf8QuartetIndicator( ch ) ) {
+ if ( len - i < 3 ) // too short
+ return false;
+ if ( isUtf8OverlongQuartet( ch, s[i+1] ) ) // not minimally encoded
+ return false;
+ if ( !isUtf8Continuation( s[i+2] ) ||
+ !isUtf8Continuation( s[i+3] ) ) // not followed by 2x 10xx xxxx
+ return false;
+ i += 3;
+ } else if ( isUtf8QuintetIndicator( ch ) ) {
+ if ( len - i < 4 ) // too short
+ return false;
+ if ( isUtf8OverlongQuintet( ch, s[i+1] ) ) // not minimally encoded
+ return false;
+ if ( !isUtf8Continuation( s[i+2] ) ||
+ !isUtf8Continuation( s[i+3] ) ||
+ !isUtf8Continuation( s[i+4] ) ) // not followed by 3x 10xx xxxx
+ return false;
+ i += 4;
+ } else if ( isUtf8SextetIndicator( ch ) ) {
+ if ( len - i < 5 ) // too short
+ return false;
+ if ( isUtf8OverlongSextet( ch, s[i+1] ) ) // not minimally encoded
+ return false;
+ if ( !isUtf8Continuation( s[i+2] ) ||
+ !isUtf8Continuation( s[i+3] ) ||
+ !isUtf8Continuation( s[i+4] ) ||
+ !isUtf8Continuation( s[i+5] ) ) // not followed by 4x 10xx xxxx
+ return false;
+ i += 5;
+ } else
+ return false;
+ }
+ return true;
+}