1 files changed, 113 insertions, 0 deletions
diff --git a/khexedit/lib/codecs/khexadecimalbytecodec.cpp b/khexedit/lib/codecs/khexadecimalbytecodec.cpp
new file mode 100644
index 0000000..7072464
--- /dev/null
+++ b/khexedit/lib/codecs/khexadecimalbytecodec.cpp
@@ -0,0 +1,113 @@
+/***************************************************************************
+                          khexadecimalbytecodec.cpp  -  description
+                             -------------------
+    begin                : Mo Nov 29 2004
+    copyright            : (C) 2004 by Friedrich W. H. Kossebau
+    email                : Friedrich.W.H@Kossebau.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License version 2 as published by the Free Software Foundation.       *
+ *                                                                         *
+ ***************************************************************************/
+
+
+// lib specific
+#include "khexadecimalbytecodec.h"
+
+using namespace KHE;
+
+
+static const QChar BigDigit[16] =
+{ '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' };
+static const QChar SmallDigit[16] =
+{ '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' };
+
+
+KHexadecimalByteCodec::KHexadecimalByteCodec( bool S ) : Digit( S?SmallDigit:BigDigit ) {}
+
+bool KHexadecimalByteCodec::setSmallDigits( bool S )
+{
+  bool Change = ( S && Digit == BigDigit );
+  Digit = S?SmallDigit:BigDigit;
+  return Change;
+}
+
+bool KHexadecimalByteCodec::smallDigits() const { return Digit != BigDigit; }
+
+
+void KHexadecimalByteCodec::encode( QString &Digits, unsigned int Pos, unsigned char Char ) const
+{
+  Digits.at(Pos++) = Digit[Char>>4];
+  Digits.at(Pos) = Digit[Char&0x0F];
+}
+
+void KHexadecimalByteCodec::encodeShort( QString &Digits, unsigned int Pos, unsigned char Char ) const
+{
+  unsigned char C;
+  if( (C = (Char>>4)) )
+    Digits.at(Pos++) = Digit[C];
+  Digits.at(Pos) = Digit[Char&0x0F];
+}
+
+
+static inline bool isValidBigDigit( unsigned char Digit )
+{
+  return (Digit >= 'A' && Digit <= 'F');
+}
+
+static inline bool isValidSmallDigit( unsigned char Digit )
+{
+  return (Digit >= 'a' && Digit <= 'f');
+}
+
+static inline bool isValidDecimalDigit( unsigned char Digit )
+{
+  return Digit >= '0' && Digit <= '9';
+}
+
+
+bool KHexadecimalByteCodec::isValidDigit( unsigned char Digit ) const
+{
+  return isValidDecimalDigit(Digit) || isValidBigDigit(Digit) || isValidSmallDigit(Digit);
+}
+
+bool KHexadecimalByteCodec::turnToValue( unsigned char *Digit ) const
+{
+  if( isValidDecimalDigit(*Digit) )
+    *Digit -= '0';
+  else if( isValidBigDigit(*Digit) )
+    *Digit -= 'A' - 10;
+  else if( isValidSmallDigit(*Digit) )
+    *Digit -= 'a' - 10;
+  else
+    return false;
+
+  return true;
+}
+
+bool KHexadecimalByteCodec::appendDigit( unsigned char *Byte, unsigned char Digit ) const
+{
+  if( turnToValue(&Digit) )
+  {
+    unsigned char B = *Byte;
+    if( B < 16 )
+    {
+      B <<= 4;
+      B += Digit;
+      *Byte = B;
+      return true;
+    }
+  }
+  return false;
+}
+
+
+
+void KHexadecimalByteCodec::removeLastDigit( unsigned char *Byte ) const
+{
+  *Byte >>= 4;
+}