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