1 files changed, 111 insertions, 0 deletions
diff --git a/kdvi/bigEndianByteReader.cpp b/kdvi/bigEndianByteReader.cpp
new file mode 100644
index 00000000..63d11f83
--- /dev/null
+++ b/kdvi/bigEndianByteReader.cpp
@@ -0,0 +1,111 @@
+// bigEndianByteReader.cpp
+//
+// Part of KDVI - A DVI previewer for the KDE desktop environemt 
+//
+// (C) 2003 Stefan Kebekus
+// Distributed under the GPL
+
+#include <config.h>
+
+#include <kdebug.h>
+
+#include "bigEndianByteReader.h"
+#include "dvi.h"
+
+//#define DEBUG_ENDIANREADER
+
+Q_UINT8 bigEndianByteReader::readUINT8()
+{
+  // This check saveguards us against segmentation fault. It is also
+  // necessary for virtual fonts, which do not end whith EOP.
+  if (command_pointer >= end_pointer) {
+#ifdef DEBUG_ENDIANREADER
+    kdError(4300) << "bigEndianByteReader::readUINT8() tried to read past end of data chunk" << endl;
+    kdError(4300) << "end_pointer     = " << end_pointer << endl;
+    kdError(4300) << "command_pointer = " << command_pointer << endl;
+#endif
+    return EOP;
+  }
+
+  return *(command_pointer++);
+}
+
+Q_UINT16 bigEndianByteReader::readUINT16()
+{
+  // This check saveguards us against segmentation fault. It is also
+  // necessary for virtual fonts, which do not end whith EOP.
+  if (command_pointer >= end_pointer)
+    return EOP;
+
+  Q_UINT16 a;
+  a = *(command_pointer++);
+  a = (a << 8) | *(command_pointer++);
+  return a;
+}
+
+Q_UINT32 bigEndianByteReader::readUINT32()
+{
+  // This check saveguards us against segmentation fault. It is also
+  // necessary for virtual fonts, which do not end whith EOP.
+  if (command_pointer >= end_pointer)
+    return EOP;
+
+  Q_UINT32 a;
+  a = *(command_pointer++);
+  a = (a << 8) | *(command_pointer++);
+  a = (a << 8) | *(command_pointer++);
+  a = (a << 8) | *(command_pointer++);
+  return a;
+}
+
+void bigEndianByteReader::writeUINT32(Q_UINT32 a)
+{
+  // This check saveguards us against segmentation fault. It is also
+  // necessary for virtual fonts, which do not end whith EOP.
+  if (command_pointer >= end_pointer)
+    return;
+
+  command_pointer[3] = (Q_UINT8)(a & 0xFF);
+  a = a >> 8;
+  command_pointer[2] = (Q_UINT8)(a & 0xFF);
+  a = a >> 8;
+  command_pointer[1] = (Q_UINT8)(a & 0xFF);
+  a = a >> 8;
+  command_pointer[0] = (Q_UINT8)(a & 0xFF);
+
+  command_pointer += 4;
+  return;
+}
+
+Q_UINT32 bigEndianByteReader::readUINT(Q_UINT8 size)
+{
+  // This check saveguards us against segmentation fault. It is also
+  // necessary for virtual fonts, which do not end whith EOP.
+  if (command_pointer >= end_pointer)
+    return EOP;
+
+  Q_UINT32 a = 0;
+  while (size > 0) { 
+    a = (a << 8) + *(command_pointer++);
+    size--;
+  }
+  return a;
+}
+
+Q_INT32 bigEndianByteReader::readINT(Q_UINT8 length)
+{
+  // This check saveguards us against segmentation fault. It is also
+  // necessary for virtual fonts, which do not end whith EOP.
+  if (command_pointer >= end_pointer)
+    return EOP;
+
+  Q_INT32 a = *(command_pointer++);
+
+  if (a & 0x80)
+    a -= 0x100;
+
+  while ((--length) > 0)
+    a = (a << 8) | *(command_pointer++);
+
+  return a;
+}