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

1 files changed, 141 insertions, 0 deletions

diff --git a/libksieve/parser/utf8validator.cpp b/libksieve/parser/utf8validator.cpp
new file mode 100644
index 000000000..248a1f5e9
--- /dev/null
+++ b/libksieve/parser/utf8validator.cpp
@@ -0,0 +1,141 @@
+/*  -*- 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;
+}