datstrm.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        datstrm.cpp
// Purpose:     Data stream classes
// Author:      Guilhem Lavaux
// Modified by: Mickael Gilabert
// Created:     28/06/98
// RCS-ID:      $Id: datstrm.cpp,v 1.47 2005/07/22 17:04:39 ABX Exp $
// Copyright:   (c) Guilhem Lavaux
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "datstrm.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
  #pragma hdrstop
#endif

#if wxUSE_STREAMS

#include "wx/datstrm.h"

// ---------------------------------------------------------------------------
// wxDataInputStream
// ---------------------------------------------------------------------------

#if wxUSE_UNICODE
wxDataInputStream::wxDataInputStream(wxInputStream& s, wxMBConv& conv)
  : m_input(&s), m_be_order(false), m_conv(conv)
#else
wxDataInputStream::wxDataInputStream(wxInputStream& s)
  : m_input(&s), m_be_order(false)
#endif
{
}

wxUint64 wxDataInputStream::Read64()
{
  wxUint64 i64;

  m_input->Read(&i64, 8);

  if (m_be_order)
    return wxUINT64_SWAP_ON_LE(i64);
  else
    return wxUINT64_SWAP_ON_BE(i64);
}

wxUint32 wxDataInputStream::Read32()
{
  wxUint32 i32;

  m_input->Read(&i32, 4);

  if (m_be_order)
    return wxUINT32_SWAP_ON_LE(i32);
  else
    return wxUINT32_SWAP_ON_BE(i32);
}

wxUint16 wxDataInputStream::Read16()
{
  wxUint16 i16;

  m_input->Read(&i16, 2);

  if (m_be_order)
    return wxUINT16_SWAP_ON_LE(i16);
  else
    return wxUINT16_SWAP_ON_BE(i16);
}

wxUint8 wxDataInputStream::Read8()
{
  wxUint8 buf;

  m_input->Read(&buf, 1);
  return (wxUint8)buf;
}

// Must be at global scope for VC++ 5
extern "C" double ConvertFromIeeeExtended(const unsigned char *bytes);

double wxDataInputStream::ReadDouble()
{
#if wxUSE_APPLE_IEEE
  char buf[10];

  m_input->Read(buf, 10);
  return ConvertFromIeeeExtended((unsigned char *)buf);
#else
  return 0.0;
#endif
}

wxString wxDataInputStream::ReadString()
{
  size_t len;

  len = Read32();

  if (len > 0)
  {
#if wxUSE_UNICODE
    wxCharBuffer tmp(len + 1);
    m_input->Read(tmp.data(), len);
    tmp.data()[len] = '\0';
    wxString ret(m_conv.cMB2WX(tmp.data()));
#else
    wxString ret;
    m_input->Read( wxStringBuffer(ret, len), len);
#endif
    return ret;
  }
  else
    return wxEmptyString;
}

void wxDataInputStream::Read64(wxUint64 *buffer, size_t size)
{
  m_input->Read(buffer, size * 8);

  if (m_be_order)
  {
    for (wxUint32 i=0; i<size; i++)
    {
      wxUint64 v = wxUINT64_SWAP_ON_LE(*buffer);
      *(buffer++) = v;
    }
  }
  else
  {
    for (wxUint32 i=0; i<size; i++)
    {
      wxUint64 v = wxUINT64_SWAP_ON_BE(*buffer);
      *(buffer++) = v;
    }
  }
}

void wxDataInputStream::Read32(wxUint32 *buffer, size_t size)
{
    m_input->Read(buffer, size * 4);

    if (m_be_order)
    {
        for (wxUint32 i=0; i<size; i++)
        {
            wxUint32 v = wxUINT32_SWAP_ON_LE(*buffer);
            *(buffer++) = v;
        }
    }
    else
    {
        for (wxUint32 i=0; i<size; i++)
        {
            wxUint32 v = wxUINT32_SWAP_ON_BE(*buffer);
            *(buffer++) = v;
        }
    }
}

void wxDataInputStream::Read16(wxUint16 *buffer, size_t size)
{
  m_input->Read(buffer, size * 2);

  if (m_be_order)
  {
    for (wxUint32 i=0; i<size; i++)
    {
      wxUint16 v = wxUINT16_SWAP_ON_LE(*buffer);
      *(buffer++) = v;
    }
  }
  else
  {
    for (wxUint32 i=0; i<size; i++)
    {
      wxUint16 v = wxUINT16_SWAP_ON_BE(*buffer);
      *(buffer++) = v;
    }
  }
}

void wxDataInputStream::Read8(wxUint8 *buffer, size_t size)
{
  m_input->Read(buffer, size);
}

void wxDataInputStream::ReadDouble(double *buffer, size_t size)
{
  for (wxUint32 i=0; i<size; i++)
  {
    *(buffer++) = ReadDouble();
  }
}

wxDataInputStream& wxDataInputStream::operator>>(wxString& s)
{
  s = ReadString();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(wxInt8& c)
{
  c = (wxInt8)Read8();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(wxInt16& i)
{
  i = (wxInt16)Read16();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(wxInt32& i)
{
  i = (wxInt32)Read32();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(wxUint8& c)
{
  c = Read8();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(wxUint16& i)
{
  i = Read16();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(wxUint32& i)
{
  i = Read32();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(wxUint64& i)
{
  i = Read64();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(double& i)
{
  i = ReadDouble();
  return *this;
}

wxDataInputStream& wxDataInputStream::operator>>(float& f)
{
  f = (float)ReadDouble();
  return *this;
}

// ---------------------------------------------------------------------------
// wxDataOutputStream
// ---------------------------------------------------------------------------

#if wxUSE_UNICODE
wxDataOutputStream::wxDataOutputStream(wxOutputStream& s, wxMBConv& conv)
  : m_output(&s), m_be_order(false), m_conv(conv)
#else
wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
  : m_output(&s), m_be_order(false)
#endif
{
}

void wxDataOutputStream::Write64(wxUint64 i)
{
  wxUint64 i64;

  if (m_be_order)
    i64 = wxUINT64_SWAP_ON_LE(i);
  else
    i64 = wxUINT64_SWAP_ON_BE(i);
  m_output->Write(&i64, 8);
}

void wxDataOutputStream::Write32(wxUint32 i)
{
  wxUint32 i32;

  if (m_be_order)
    i32 = wxUINT32_SWAP_ON_LE(i);
  else
    i32 = wxUINT32_SWAP_ON_BE(i);
  m_output->Write(&i32, 4);
}

void wxDataOutputStream::Write16(wxUint16 i)
{
  wxUint16 i16;

  if (m_be_order)
    i16 = wxUINT16_SWAP_ON_LE(i);
  else
    i16 = wxUINT16_SWAP_ON_BE(i);

  m_output->Write(&i16, 2);
}

void wxDataOutputStream::Write8(wxUint8 i)
{
  m_output->Write(&i, 1);
}

void wxDataOutputStream::WriteString(const wxString& string)
{
#if wxUSE_UNICODE
  const wxWX2MBbuf buf = string.mb_str(m_conv);
#else
  const wxWX2MBbuf buf = string.mb_str();
#endif
  size_t len = strlen(buf);
  Write32(len);
  if (len > 0)
      m_output->Write(buf, len);
}

// Must be at global scope for VC++ 5
extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);

void wxDataOutputStream::WriteDouble(double d)
{
  char buf[10];

#if wxUSE_APPLE_IEEE
  ConvertToIeeeExtended(d, (unsigned char *)buf);
#else
#if !defined(__VMS__) && !defined(__GNUG__)
# pragma warning "wxDataOutputStream::WriteDouble() not using IeeeExtended - will not work!"
#endif
   buf[0] = '\0';
#endif
  m_output->Write(buf, 10);
}

void wxDataOutputStream::Write64(const wxUint64 *buffer, size_t size)
{
  if (m_be_order)
  {
    for (wxUint32 i=0; i<size ;i++)
    {
      wxUint64 i64 = wxUINT64_SWAP_ON_LE(*buffer);
      buffer++;
      m_output->Write(&i64, 8);
    }
  }
  else
  {
    for (wxUint32 i=0; i<size ;i++)
    {
      wxUint64 i64 = wxUINT64_SWAP_ON_BE(*buffer);
      buffer++;
      m_output->Write(&i64, 8);
    }
  }
}

void wxDataOutputStream::Write32(const wxUint32 *buffer, size_t size)
{
  if (m_be_order)
  {
    for (wxUint32 i=0; i<size ;i++)
    {
      wxUint32 i32 = wxUINT32_SWAP_ON_LE(*buffer);
      buffer++;
      m_output->Write(&i32, 4);
    }
  }
  else
  {
    for (wxUint32 i=0; i<size ;i++)
    {
      wxUint32 i32 = wxUINT32_SWAP_ON_BE(*buffer);
      buffer++;
      m_output->Write(&i32, 4);
    }
  }
}

void wxDataOutputStream::Write16(const wxUint16 *buffer, size_t size)
{
  if (m_be_order)
  {
    for (wxUint32 i=0; i<size ;i++)
    {
      wxUint16 i16 = wxUINT16_SWAP_ON_LE(*buffer);
      buffer++;
      m_output->Write(&i16, 2);
    }
  }
  else
  {
    for (wxUint32 i=0; i<size ;i++)
    {
      wxUint16 i16 = wxUINT16_SWAP_ON_BE(*buffer);
      buffer++;
      m_output->Write(&i16, 2);
    }
  }
}

void wxDataOutputStream::Write8(const wxUint8 *buffer, size_t size)
{
  m_output->Write(buffer, size);
}

void wxDataOutputStream::WriteDouble(const double *buffer, size_t size)
{
  for (wxUint32 i=0; i<size; i++)
  {
    WriteDouble(*(buffer++));
  }
}

wxDataOutputStream& wxDataOutputStream::operator<<(const wxChar *string)
{
  Write32(wxStrlen(string));
  m_output->Write((const char *)string, wxStrlen(string)*sizeof(wxChar));
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(const wxString& string)
{
  WriteString(string);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(wxInt8 c)
{
  Write8((wxUint8)c);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(wxInt16 i)
{
  Write16((wxUint16)i);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(wxInt32 i)
{
  Write32((wxUint32)i);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(wxUint8 c)
{
  Write8(c);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(wxUint16 i)
{
  Write16(i);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(wxUint32 i)
{
  Write32(i);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(wxUint64 i)
{
  Write64(i);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(double f)
{
  WriteDouble(f);
  return *this;
}

wxDataOutputStream& wxDataOutputStream::operator<<(float f)
{
  WriteDouble((double)f);
  return *this;
}

#endif
  // wxUSE_STREAMS