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     switch (c) {
  94     case '\n':
  95       end_line = TRUE;
  96       break;
  97     case '\r':
  98       last_endl = '\r';
  99       break;
 100     default:
 101       if (last_endl == '\r') {
 102         end_line = TRUE;
 103         InputStreamBuffer()->WriteBack(c);
 104         break;
 105       }
 106       line += c;
 107       break;
 108     }
 109   }
 110   return line;
 111 }
 112
 113 wxString wxDataInputStream::ReadString()
 114 {
 115   wxString wx_string;
 116   char *string;
 117   unsigned long len;
 118
 119   len = Read32();
 120   string = new char[len+1];
 121
 122   Read(string, len);
 123
 124   string[len] = 0;
 125   wx_string = string;
 126   delete string;
 127
 128   return wx_string;
 129 }
 130
 131 // ---------------------------------------------------------------------------
 132 // wxDataOutputStream
 133 // ---------------------------------------------------------------------------
 134
 135 wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 136  : wxFilterOutputStream(s)
 137 {
 138 }
 139
 140 wxDataOutputStream::~wxDataOutputStream()
 141 {
 142 }
 143
 144 void wxDataOutputStream::Write32(unsigned long i)
 145 {
 146   char buf[4];
 147
 148   buf[0] = i & 0xff;
 149   buf[1] = (i >> 8) & 0xff;
 150   buf[2] = (i >> 16) & 0xff;
 151   buf[3] = (i >> 24) & 0xff;
 152   Write(buf, 4);
 153 }
 154
 155 void wxDataOutputStream::Write16(unsigned short i)
 156 {
 157   char buf[2];
 158
 159   buf[0] = i & 0xff;
 160   buf[1] = (i >> 8) & 0xff;
 161   Write(buf, 2);
 162 }
 163
 164 void wxDataOutputStream::Write8(unsigned char i)
 165 {
 166   Write(&i, 1);
 167 }
 168
 169 void wxDataOutputStream::WriteLine(const wxString& line)
 170 {
 171 #ifdef __WXMSW__
 172   wxString tmp_string = line + _T("\r\n");
 173 #else
 174   wxString tmp_string = line + _T('\n');
 175 #endif
 176
 177   Write((const wxChar *) tmp_string, tmp_string.Length()*sizeof(wxChar));
 178 }
 179
 180 void wxDataOutputStream::WriteString(const wxString& string)
 181 {
 182   Write32(string.Length());
 183   Write((const wxChar *) string, string.Length()*sizeof(wxChar));
 184 }
 185
 186 // Must be at global scope for VC++ 5
 187 extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);
 188
 189 void wxDataOutputStream::WriteDouble(double d)
 190 {
 191   char buf[10];
 192
 193 #if wxUSE_APPLE_IEEE
 194   ConvertToIeeeExtended(d, (unsigned char *)buf);
 195 #else
 196 #  pragma warning "wxDataOutputStream::WriteDouble() not using IeeeExtended - will not work!"
 197  buf[0] = '\0';
 198 #endif
 199   Write(buf, 10);
 200 }
 201
 202 #endif
 203   // wxUSE_STREAMS
 204