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