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