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   : m_input(&s)
  33 {
  34 }
  35
  36 wxDataInputStream::~wxDataInputStream()
  37 {
  38 }
  39
  40 wxUint32 wxDataInputStream::Read32()
  41 {
  42   char buf[4];
  43
  44   m_input->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   m_input->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   m_input->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   m_input->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   m_input->Read(string, len);
  95
  96   string[len] = 0;
  97   wx_string = string;
  98   delete string;
  99
 100   return wx_string;
 101 }
 102
 103 wxDataInputStream& wxDataInputStream::operator>>(wxString& s)
 104 {
 105   s = ReadString();
 106   return *this;
 107 }
 108
 109 wxDataInputStream& wxDataInputStream::operator>>(wxInt8& c)
 110 {
 111   c = (wxInt8)Read8();
 112   return *this;
 113 }
 114
 115 wxDataInputStream& wxDataInputStream::operator>>(wxInt16& i)
 116 {
 117   i = (wxInt16)Read16();
 118   return *this;
 119 }
 120
 121 wxDataInputStream& wxDataInputStream::operator>>(wxInt32& i)
 122 {
 123   i = (wxInt32)Read32();
 124   return *this;
 125 }
 126
 127 wxDataInputStream& wxDataInputStream::operator>>(wxUint8& c)
 128 {
 129   c = Read8();
 130   return *this;
 131 }
 132
 133 wxDataInputStream& wxDataInputStream::operator>>(wxUint16& i)
 134 {
 135   i = Read16();
 136   return *this;
 137 }
 138
 139 wxDataInputStream& wxDataInputStream::operator>>(wxUint32& i)
 140 {
 141   i = Read32();
 142   return *this;
 143 }
 144
 145 wxDataInputStream& wxDataInputStream::operator>>(double& i)
 146 {
 147   i = ReadDouble();
 148   return *this;
 149 }
 150
 151 wxDataInputStream& wxDataInputStream::operator>>(float& f)
 152 {
 153   f = (float)ReadDouble();
 154   return *this;
 155 }
 156
 157 // ---------------------------------------------------------------------------
 158 // wxDataOutputStream
 159 // ---------------------------------------------------------------------------
 160
 161 wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 162   : m_output(&s)
 163 {
 164 }
 165
 166 wxDataOutputStream::~wxDataOutputStream()
 167 {
 168 }
 169
 170 void wxDataOutputStream::Write32(wxUint32 i)
 171 {
 172   char buf[4];
 173
 174   buf[0] = i & 0xff;
 175   buf[1] = (i >> 8) & 0xff;
 176   buf[2] = (i >> 16) & 0xff;
 177   buf[3] = (i >> 24) & 0xff;
 178   m_output->Write(buf, 4);
 179 }
 180
 181 void wxDataOutputStream::Write16(wxUint16 i)
 182 {
 183   char buf[2];
 184
 185   buf[0] = i & 0xff;
 186   buf[1] = (i >> 8) & 0xff;
 187   m_output->Write(buf, 2);
 188 }
 189
 190 void wxDataOutputStream::Write8(wxUint8 i)
 191 {
 192   m_output->Write(&i, 1);
 193 }
 194
 195 void wxDataOutputStream::WriteString(const wxString& string)
 196 {
 197   Write32(string.Length());
 198   m_output->Write((const wxChar *) string, string.Length()*sizeof(wxChar));
 199 }
 200
 201 // Must be at global scope for VC++ 5
 202 extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);
 203
 204 void wxDataOutputStream::WriteDouble(double d)
 205 {
 206   char buf[10];
 207
 208 #if wxUSE_APPLE_IEEE
 209   ConvertToIeeeExtended(d, (unsigned char *)buf);
 210 #else
 211 #  pragma warning "wxDataOutputStream::WriteDouble() not using IeeeExtended - will not work!"
 212  buf[0] = '\0';
 213 #endif
 214   m_output->Write(buf, 10);
 215 }
 216
 217 wxDataOutputStream& wxDataOutputStream::operator<<(const wxChar *string)
 218 {
 219   Write32(wxStrlen(string));
 220   m_output->Write((const char *)string, wxStrlen(string)*sizeof(wxChar));
 221   return *this;
 222 }
 223
 224 wxDataOutputStream& wxDataOutputStream::operator<<(wxString& string)
 225 {
 226   WriteString(string);
 227   return *this;
 228 }
 229
 230 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt8 c)
 231 {
 232   Write8((wxUint8)c);
 233   return *this;
 234 }
 235
 236 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt16 i)
 237 {
 238   Write16((wxUint16)i);
 239   return *this;
 240 }
 241
 242 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt32 i)
 243 {
 244   Write32((wxUint32)i);
 245   return *this;
 246 }
 247
 248 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint8 c)
 249 {
 250   Write8(c);
 251   return *this;
 252 }
 253
 254 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint16 i)
 255 {
 256   Write16(i);
 257   return *this;
 258 }
 259
 260 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint32 i)
 261 {
 262   Write32(i);
 263   return *this;
 264 }
 265
 266 wxDataOutputStream& wxDataOutputStream::operator<<(double f)
 267 {
 268   WriteDouble(f);
 269   return *this;
 270 }
 271
 272 wxDataOutputStream& wxDataOutputStream::operator<<(float f)
 273 {
 274   WriteDouble((double)f);
 275   return *this;
 276 }
 277
 278 #endif
 279   // wxUSE_STREAMS
 280