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