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 wxUint32 wxDataInputStream::Read32()
  41 {
  42   char buf[4];
  43
  44   Read(buf, 4);
  45
  46   return (wxUint32)buf[0] |
  47          ((wxUint32)buf[1] << 8) |
  48          ((wxUint32)buf[2] << 16) |
  49          ((wxUint32)buf[3] << 24);
  50 }
  51
  52 wxUint16 wxDataInputStream::Read16()
  53 {
  54   char buf[2];
  55
  56   Read(buf, 2);
  57
  58   return (wxUint16)buf[0] |
  59          ((wxUint16)buf[1] << 8);
  60 }
  61
  62 wxUint8 wxDataInputStream::Read8()
  63 {
  64   wxUint8 buf;
  65
  66   Read((char *)&buf, 1);
  67   return (wxUint8)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::ReadString()
  86 {
  87   wxString wx_string;
  88   char *string;
  89   unsigned long len;
  90
  91   len = Read32();
  92   string = new char[len+1];
  93
  94   Read(string, len);
  95
  96   string[len] = 0;
  97   wx_string = string;
  98   delete string;
  99
 100   return wx_string;
 101 }
 102
 103 // ---------------------------------------------------------------------------
 104 // wxDataOutputStream
 105 // ---------------------------------------------------------------------------
 106
 107 wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 108  : wxFilterOutputStream(s)
 109 {
 110 }
 111
 112 wxDataOutputStream::~wxDataOutputStream()
 113 {
 114 }
 115
 116 void wxDataOutputStream::Write32(wxUint32 i)
 117 {
 118   char buf[4];
 119
 120   buf[0] = i & 0xff;
 121   buf[1] = (i >> 8) & 0xff;
 122   buf[2] = (i >> 16) & 0xff;
 123   buf[3] = (i >> 24) & 0xff;
 124   Write(buf, 4);
 125 }
 126
 127 void wxDataOutputStream::Write16(wxUint16 i)
 128 {
 129   char buf[2];
 130
 131   buf[0] = i & 0xff;
 132   buf[1] = (i >> 8) & 0xff;
 133   Write(buf, 2);
 134 }
 135
 136 void wxDataOutputStream::Write8(wxUint8 i)
 137 {
 138   Write(&i, 1);
 139 }
 140
 141 void wxDataOutputStream::WriteString(const wxString& string)
 142 {
 143   Write32(string.Length());
 144   Write((const wxChar *) string, string.Length()*sizeof(wxChar));
 145 }
 146
 147 // Must be at global scope for VC++ 5
 148 extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);
 149
 150 void wxDataOutputStream::WriteDouble(double d)
 151 {
 152   char buf[10];
 153
 154 #if wxUSE_APPLE_IEEE
 155   ConvertToIeeeExtended(d, (unsigned char *)buf);
 156 #else
 157 #  pragma warning "wxDataOutputStream::WriteDouble() not using IeeeExtended - will not work!"
 158  buf[0] = '\0';
 159 #endif
 160   Write(buf, 10);
 161 }
 162
 163 #endif
 164   // wxUSE_STREAMS
 165