root/axscript/DataIO.cpp

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DEFINITIONS

This source file includes following definitions.
  1. ReadBoolean
  2. ReadU8
  3. ReadU16
  4. ReadU32
  5. ReadFloat
  6. ReadDouble
  7. ReadUTFBytes
  8. ReadUTF
  9. ReadByteArray
  10. CheckEOF
  11. ThrowEOFError
  12. ThrowMemoryError
  13. ThrowRangeError
  14. WriteBoolean
  15. WriteU8
  16. WriteU16
  17. WriteU32
  18. WriteFloat
  19. WriteDouble
  20. WriteUTF
  21. WriteUTFBytes
  22. WriteByteArray

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
 * Adobe System Incorporated.
 * Portions created by the Initial Developer are Copyright (C) 2004-2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Adobe AS3 Team
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */


#include "axtam.h"
namespace axtam {
        class ByteArrayObject;
        class ByteArray;
}
#include "DataIO.h"
#include "ByteArrayGlue.h"
#include "DomainClass.h"


namespace axtam
{
    #define M_ERROR_CLASS(class_id) ((ErrorClass*)m_toplevel->getPlayerClass(avmplus::NativeID::abcclass_##class_id))
        
        bool DataInput::ReadBoolean()
        {
                U8 value;               

                Read(&value, 1);
                return value != 0;
        }

        U8 DataInput::ReadU8()
        {
                U8 value;

                Read(&value, 1);
                return value;
        }

        unsigned short DataInput::ReadU16()
        {
                unsigned short value;

                Read(&value, 2);
                ConvertU16(value);
                return value;
        }
        
        uint32 DataInput::ReadU32()
        {
                uint32 value;
                Read(&value, 4);
                ConvertU32(value);
                return value;
        }

        float DataInput::ReadFloat()
        {
                union {
                        uint32 u;
                        float f;
                };
                u = ReadU32();
                return f;
        }

        double DataInput::ReadDouble()
        {
                double value;
                Read(&value, 8);
                ConvertU64((uint64&)value);
                return value;
        }

        String* DataInput::ReadUTFBytes(uint32 length)
        {
                CheckEOF(length);
                
                char *buffer = new char[length+1];
                if (!buffer) {
                        ThrowMemoryError();
                }

                Read(buffer, length);
                buffer[length] = 0;
                
                String *out = m_toplevel->core()->newString(buffer);
                delete [] buffer;
                
                return out;
        }
        
        String* DataInput::ReadUTF()
        {
                return ReadUTFBytes(ReadU16());
        }

        void DataInput::ReadByteArray(ByteArray& buffer,
                                                                  uint32 offset,
                                                                  uint32 count)
        {
                uint32 available = Available();
                
                if (count == 0) {
                        count = available;
                }
                
                if (count > available) {
                        ThrowEOFError();
                }

                // Grow the buffer if necessary
                if (offset + count >= buffer.GetLength()) {
                        buffer.SetLength(offset + count);
                }

                Read(buffer.GetBuffer() + offset, count);
        }

        void DataInput::CheckEOF(uint32 count)
        {
                if (Available() < count) {
                        ThrowEOFError();
                }
        }

        void DataInput::ThrowEOFError()
        {
                m_toplevel->throwError(kEndOfFileError);
        }

        void DataInput::ThrowMemoryError()
        {
                m_toplevel->throwError(kOutOfMemoryError);
        }
        
        //
        // DataOutput
        //

        void DataOutput::ThrowRangeError()
        {
                m_toplevel->throwRangeError(kInvalidRangeError);
        }
        
        void DataOutput::WriteBoolean(bool value)
        {
                WriteU8(value ? 1 : 0);
        }

        void DataOutput::WriteU8(U8 value)
        {
                Write(&value, 1);
        }

        void DataOutput::WriteU16(unsigned short value)
        {
                ConvertU16(value);
                Write(&value, 2);
        }

        void DataOutput::WriteU32(uint32 value)
        {
                ConvertU32(value);
                Write(&value, 4);
        }
        
        void DataOutput::WriteFloat(float value)
        {
                WriteU32(*((uint32*)&value));
        }

        void DataOutput::WriteDouble(double value)
        {
                ConvertU64((uint64&)value);
                Write(&value, 8);
        }

        void DataOutput::WriteUTF(String *str)
        {
                UTF8String* utf8 = str->toUTF8String();
                uint32 length = utf8->length();
                if (length > 65535) {
                        ThrowRangeError();
                }
                WriteU16((unsigned short)length);
                Write(utf8->c_str(), length*sizeof(char));
        }

        void DataOutput::WriteUTFBytes(String *str)
        {
                UTF8String* utf8 = str->toUTF8String();
                int len = utf8->length();
                Write(utf8->c_str(), len*sizeof(char));
        }
        
        void DataOutput::WriteByteArray(ByteArray& buffer,
                                                                        uint32 offset,
                                                                        uint32 count)
        {
                if (buffer.GetLength() < offset)
                        offset = buffer.GetLength();

                if (count == 0) {
                        count = buffer.GetLength()-offset;
                }

                if (count > buffer.GetLength()-offset) {
                        ThrowRangeError();
                }
                        
                if (count > 0) {
                        Write(buffer.GetBuffer()+offset, count);
                }
        }
}



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