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 #if wxUSE_STREAMS
  24
  25 #include "wx/datstrm.h"
  26
  27 // ---------------------------------------------------------------------------
  28 // wxDataInputStream
  29 // ---------------------------------------------------------------------------
  30
  31 wxDataInputStream::wxDataInputStream(wxInputStream& s)
  32   : wxFilterInputStream(s)
  33 {
  34 }
  35
  36 wxDataInputStream::~wxDataInputStream()
  37 {
  38 }
  39
  40 unsigned long wxDataInputStream::Read32()
  41 {
  42   char buf[4];
  43
  44   Read(buf, 4);
  45
  46   return (unsigned long)buf[0] |
  47          ((unsigned long)buf[1] << 8) |
  48          ((unsigned long)buf[2] << 16) |
  49          ((unsigned long)buf[3] << 24);
  50 }
  51
  52 unsigned short wxDataInputStream::Read16()
  53 {
  54   char buf[2];
  55
  56   Read(buf, 2);
  57
  58   return (unsigned short)buf[0] |
  59          ((unsigned short)buf[1] << 8);
  60 }
  61
  62 unsigned char wxDataInputStream::Read8()
  63 {
  64   char buf;
  65
  66   Read(&buf, 1);
  67   return (unsigned char)buf;
  68 }
  69
  70 // Must be at global scope for VC++ 5
  71 extern "C" double ConvertFromIeeeExtended(const unsigned char *bytes);
  72
  73 double wxDataInputStream::ReadDouble()
  74 {
  75 #if wxUSE_APPLE_IEEE
  76   char buf[10];
  77
  78   Read(buf, 10);
  79   return ConvertFromIeeeExtended((unsigned char *)buf);
  80 #else
  81   return 0.0;
  82 #endif
  83 }
  84
  85 wxString wxDataInputStream::ReadLine()
  86 {
  87   char c, last_endl = 0;
  88   bool end_line = FALSE;
  89   wxString line;
  90
  91   while (!end_line) {
  92     c = GetC();
  93     if (LastError() != wxStream_NOERROR)
  94       break;
  95
  96     switch (c) {
  97     case '\n':
  98       end_line = TRUE;
  99       break;
 100     case '\r':
 101       last_endl = '\r';
 102       break;
 103     default:
 104       if (last_endl == '\r') {
 105         end_line = TRUE;
 106         InputStreamBuffer()->WriteBack(c);
 107         break;
 108       }
 109       line += c;
 110       break;
 111     }
 112   }
 113   return line;
 114 }
 115
 116 wxString wxDataInputStream::ReadString()
 117 {
 118   wxString wx_string;
 119   char *string;
 120   unsigned long len;
 121
 122   len = Read32();
 123   string = new char[len+1];
 124
 125   Read(string, len);
 126
 127   string[len] = 0;
 128   wx_string = string;
 129   delete string;
 130
 131   return wx_string;
 132 }
 133
 134 // ---------------------------------------------------------------------------
 135 // wxDataOutputStream
 136 // ---------------------------------------------------------------------------
 137
 138 wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 139  : wxFilterOutputStream(s)
 140 {
 141 }
 142
 143 wxDataOutputStream::~wxDataOutputStream()
 144 {
 145 }
 146
 147 void wxDataOutputStream::Write32(unsigned long i)
 148 {
 149   char buf[4];
 150
 151   buf[0] = i & 0xff;
 152   buf[1] = (i >> 8) & 0xff;
 153   buf[2] = (i >> 16) & 0xff;
 154   buf[3] = (i >> 24) & 0xff;
 155   Write(buf, 4);
 156 }
 157
 158 void wxDataOutputStream::Write16(unsigned short i)
 159 {
 160   char buf[2];
 161
 162   buf[0] = i & 0xff;
 163   buf[1] = (i >> 8) & 0xff;
 164   Write(buf, 2);
 165 }
 166
 167 void wxDataOutputStream::Write8(unsigned char i)
 168 {
 169   Write(&i, 1);
 170 }
 171
 172 void wxDataOutputStream::WriteLine(const wxString& line)
 173 {
 174 #ifdef __WXMSW__
 175   wxString tmp_string = line + _T("\r\n");
 176 #else
 177   wxString tmp_string = line + _T('\n');
 178 #endif
 179
 180   Write((const wxChar *) tmp_string, tmp_string.Length()*sizeof(wxChar));
 181 }
 182
 183 void wxDataOutputStream::WriteString(const wxString& string)
 184 {
 185   Write32(string.Length());
 186   Write((const wxChar *) string, string.Length()*sizeof(wxChar));
 187 }
 188
 189 // Must be at global scope for VC++ 5
 190 extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);
 191
 192 void wxDataOutputStream::WriteDouble(double d)
 193 {
 194   char buf[10];
 195
 196 #if wxUSE_APPLE_IEEE
 197   ConvertToIeeeExtended(d, (unsigned char *)buf);
 198 #else
 199 #  pragma warning "wxDataOutputStream::WriteDouble() not using IeeeExtended - will not work!"
 200  buf[0] = '\0';
 201 #endif
 202   Write(buf, 10);
 203 }
 204
 205 #endif
 206   // wxUSE_STREAMS
 207