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   if (!m_istream)
  48     return 0;
  49
  50   Read(buf, 4);
  51
  52   return (unsigned long)buf[0] |
  53          ((unsigned long)buf[1] << 8) |
  54          ((unsigned long)buf[2] << 16) |
  55          ((unsigned long)buf[3] << 24);
  56 }
  57
  58 unsigned short wxDataInputStream::Read16()
  59 {
  60   char buf[2];
  61
  62   if (!m_istream)
  63     return 0;
  64
  65   Read(buf, 2);
  66
  67   return (unsigned short)buf[0] |
  68          ((unsigned short)buf[1] << 8);
  69 }
  70
  71 unsigned char wxDataInputStream::Read8()
  72 {
  73   char buf;
  74
  75   if (!m_istream)
  76     return 0;
  77
  78   Read(&buf, 1);
  79   return (unsigned char)buf;
  80 }
  81
  82 // Must be at global scope for VC++ 5
  83 extern "C" double ConvertFromIeeeExtended(const unsigned char *bytes);
  84
  85 double wxDataInputStream::ReadDouble()
  86 {
  87 #if USE_APPLE_IEEE
  88   char buf[10];
  89
  90   if (!m_istream)
  91     return 0.0;
  92
  93   Read(buf, 10);
  94   return ConvertFromIeeeExtended((unsigned char *)buf);
  95 #else
  96   return 0.0;
  97 #endif
  98 }
  99
 100 wxString wxDataInputStream::ReadLine()
 101 {
 102   char i_strg[255];
 103
 104   if (!m_istream)
 105     return "";
 106
 107   // TODO: Implement ReadLine
 108   return i_strg;
 109 }
 110
 111 wxString wxDataInputStream::ReadString()
 112 {
 113   wxString wx_string;
 114   char *string;
 115   unsigned long len;
 116
 117   if (!m_istream)
 118     return "";
 119
 120   len = Read32();
 121   string = new char[len+1];
 122
 123   Read(string, len);
 124
 125   string[len] = 0;
 126   wx_string = string;
 127   delete string;
 128
 129   return wx_string;
 130 }
 131
 132 wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 133  : wxFilterOutputStream(s)
 134 {
 135 }
 136
 137 void wxDataOutputStream::Write32(unsigned long i)
 138 {
 139   char buf[4];
 140
 141   if (!m_ostream)
 142     return;
 143
 144   buf[0] = i & 0xff;
 145   buf[1] = (i >> 8) & 0xff;
 146   buf[2] = (i >> 16) & 0xff;
 147   buf[3] = (i >> 24) & 0xff;
 148   Write(buf, 4);
 149 }
 150
 151 void wxDataOutputStream::Write16(unsigned short i)
 152 {
 153   char buf[2];
 154
 155   if (!m_ostream)
 156     return;
 157
 158   buf[0] = i & 0xff;
 159   buf[1] = (i >> 8) & 0xff;
 160   Write(buf, 2);
 161 }
 162
 163 void wxDataOutputStream::Write8(unsigned char i)
 164 {
 165   if (!m_ostream)
 166     return;
 167
 168   Write(&i, 1);
 169 }
 170
 171 void wxDataOutputStream::WriteLine(const wxString& line)
 172 {
 173 #ifdef __WXMSW__
 174   wxString tmp_string = line + "\r\n";
 175 #else
 176   wxString tmp_string = line + '\n';
 177 #endif
 178
 179   if (!m_ostream)
 180     return;
 181
 182   Write((const char *) tmp_string, tmp_string.Length());
 183 }
 184
 185 void wxDataOutputStream::WriteString(const wxString& string)
 186 {
 187   if (!m_ostream)
 188     return;
 189
 190   Write32(string.Length());
 191   Write((const char *) string, string.Length());
 192 }
 193
 194 // Must be at global scope for VC++ 5
 195 extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);
 196
 197 void wxDataOutputStream::WriteDouble(double d)
 198 {
 199   char buf[10];
 200
 201   if (!m_ostream)
 202     return;
 203
 204 #if USE_APPLE_IEEE
 205   ConvertToIeeeExtended(d, (unsigned char *)buf);
 206 #else
 207 #       pragma warning "wxDataStream::WriteDouble() not using IeeeExtended - will not work!"
 208  buf[0] = '\0';
 209 #endif
 210   Write(buf, 10);
 211 }