src/common/datstrm.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        datstrm.cpp
   3 // Purpose:     Data stream classes
   4 // Author:      Guilhem Lavaux
   5 // Modified by:
   6 // Created:     28/06/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Guilhem Lavaux
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "datstrm.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/defs.h"
  25 #endif
  26
  27 #include "wx/datstrm.h"
  28
  29 /*
  30 #if !USE_SHARED_LIBRARY
  31 IMPLEMENT_CLASS(wxDataInputStream, wxFilterInputStream)
  32 IMPLEMENT_CLASS(wxDataOutputStream, wxFilterOutputStream)
  33 #endif
  34 */
  35
  36 wxDataInputStream::wxDataInputStream(wxInputStream& s)
  37   : wxFilterInputStream(s)
  38 {
  39 }
  40
  41 wxDataInputStream::~wxDataInputStream()
  42 {
  43 }
  44
  45 unsigned long wxDataInputStream::Read32()
  46 {
  47   char buf[4];
  48
  49   Read(buf, 4);
  50
  51   return (unsigned long)buf[0] |
  52          ((unsigned long)buf[1] << 8) |
  53          ((unsigned long)buf[2] << 16) |
  54          ((unsigned long)buf[3] << 24);
  55 }
  56
  57 unsigned short wxDataInputStream::Read16()
  58 {
  59   char buf[2];
  60
  61   Read(buf, 2);
  62
  63   return (unsigned short)buf[0] |
  64          ((unsigned short)buf[1] << 8);
  65 }
  66
  67 unsigned char wxDataInputStream::Read8()
  68 {
  69   char buf;
  70
  71   Read(&buf, 1);
  72   return (unsigned char)buf;
  73 }
  74
  75 // Must be at global scope for VC++ 5
  76 extern "C" double ConvertFromIeeeExtended(const unsigned char *bytes);
  77
  78 double wxDataInputStream::ReadDouble()
  79 {
  80 #if USE_APPLE_IEEE
  81   char buf[10];
  82
  83   Read(buf, 10);
  84   return ConvertFromIeeeExtended((unsigned char *)buf);
  85 #else
  86   return 0.0;
  87 #endif
  88 }
  89
  90 wxString wxDataInputStream::ReadLine()
  91 {
  92   char i_strg[255];
  93
  94   // TODO: Implement ReadLine
  95   return i_strg;
  96 }
  97
  98 wxString wxDataInputStream::ReadString()
  99 {
 100   wxString wx_string;
 101   char *string;
 102   unsigned long len;
 103
 104   len = Read32();
 105   string = new char[len+1];
 106
 107   Read(string, len);
 108
 109   string[len] = 0;
 110   wx_string = string;
 111   delete string;
 112
 113   return wx_string;
 114 }
 115
 116 wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 117  : wxFilterOutputStream(s)
 118 {
 119 }
 120
 121 wxDataOutputStream::~wxDataOutputStream()
 122 {
 123 }
 124
 125 void wxDataOutputStream::Write32(unsigned long i)
 126 {
 127   char buf[4];
 128
 129   buf[0] = i & 0xff;
 130   buf[1] = (i >> 8) & 0xff;
 131   buf[2] = (i >> 16) & 0xff;
 132   buf[3] = (i >> 24) & 0xff;
 133   Write(buf, 4);
 134 }
 135
 136 void wxDataOutputStream::Write16(unsigned short i)
 137 {
 138   char buf[2];
 139
 140   buf[0] = i & 0xff;
 141   buf[1] = (i >> 8) & 0xff;
 142   Write(buf, 2);
 143 }
 144
 145 void wxDataOutputStream::Write8(unsigned char i)
 146 {
 147   Write(&i, 1);
 148 }
 149
 150 void wxDataOutputStream::WriteLine(const wxString& line)
 151 {
 152 #ifdef __WXMSW__
 153   wxString tmp_string = line + "\r\n";
 154 #else
 155   wxString tmp_string = line + '\n';
 156 #endif
 157
 158   Write((const char *) tmp_string, tmp_string.Length());
 159 }
 160
 161 void wxDataOutputStream::WriteString(const wxString& string)
 162 {
 163   Write32(string.Length());
 164   Write((const char *) string, string.Length());
 165 }
 166
 167 // Must be at global scope for VC++ 5
 168 extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);
 169
 170 void wxDataOutputStream::WriteDouble(double d)
 171 {
 172   char buf[10];
 173
 174 #if USE_APPLE_IEEE
 175   ConvertToIeeeExtended(d, (unsigned char *)buf);
 176 #else
 177 #       pragma warning "wxDataStream::WriteDouble() not using IeeeExtended - will not work!"
 178  buf[0] = '\0';
 179 #endif
 180   Write(buf, 10);
 181 }