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), m_be_order(FALSE)
  33 {
  34 }
  35
  36 wxDataInputStream::~wxDataInputStream()
  37 {
  38 }
  39
  40 wxUint32 wxDataInputStream::Read32()
  41 {
  42   wxUint32 i32;
  43
  44   m_input->Read(&i32, 4);
  45
  46   if (m_be_order)
  47     return wxUINT32_SWAP_ON_LE(i32);
  48   else
  49     return wxUINT32_SWAP_ON_BE(i32);
  50 }
  51
  52 wxUint16 wxDataInputStream::Read16()
  53 {
  54   wxUint16 i16;
  55
  56   m_input->Read(&i16, 2);
  57
  58   if (m_be_order)
  59     return wxUINT16_SWAP_ON_LE(i16);
  60   else
  61     return wxUINT16_SWAP_ON_BE(i16);
  62 }
  63
  64 wxUint8 wxDataInputStream::Read8()
  65 {
  66   wxUint8 buf;
  67
  68   m_input->Read(&buf, 1);
  69   return (wxUint8)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   m_input->Read(buf, 10);
  81   return ConvertFromIeeeExtended((unsigned char *)buf);
  82 #else
  83   return 0.0;
  84 #endif
  85 }
  86
  87 wxString wxDataInputStream::ReadString()
  88 {
  89   size_t len;
  90
  91   len = Read32();
  92
  93   if (len > 0)
  94   {
  95 #if wxUSE_UNICODE
  96     char *tmp = new char[len + 1];
  97     m_input->Read(tmp, len);
  98     tmp[len] = 0;
  99     wxString s(tmp);
 100     delete[] tmp;
 101 #else
 102     wxString s;
 103     m_input->Read(s.GetWriteBuf(len), len);
 104     s.UngetWriteBuf();
 105 #endif
 106     return s;
 107   }
 108   else
 109     return wxEmptyString;
 110 }
 111
 112 wxDataInputStream& wxDataInputStream::operator>>(wxString& s)
 113 {
 114   s = ReadString();
 115   return *this;
 116 }
 117
 118 wxDataInputStream& wxDataInputStream::operator>>(wxInt8& c)
 119 {
 120   c = (wxInt8)Read8();
 121   return *this;
 122 }
 123
 124 wxDataInputStream& wxDataInputStream::operator>>(wxInt16& i)
 125 {
 126   i = (wxInt16)Read16();
 127   return *this;
 128 }
 129
 130 wxDataInputStream& wxDataInputStream::operator>>(wxInt32& i)
 131 {
 132   i = (wxInt32)Read32();
 133   return *this;
 134 }
 135
 136 wxDataInputStream& wxDataInputStream::operator>>(wxUint8& c)
 137 {
 138   c = Read8();
 139   return *this;
 140 }
 141
 142 wxDataInputStream& wxDataInputStream::operator>>(wxUint16& i)
 143 {
 144   i = Read16();
 145   return *this;
 146 }
 147
 148 wxDataInputStream& wxDataInputStream::operator>>(wxUint32& i)
 149 {
 150   i = Read32();
 151   return *this;
 152 }
 153
 154 wxDataInputStream& wxDataInputStream::operator>>(double& i)
 155 {
 156   i = ReadDouble();
 157   return *this;
 158 }
 159
 160 wxDataInputStream& wxDataInputStream::operator>>(float& f)
 161 {
 162   f = (float)ReadDouble();
 163   return *this;
 164 }
 165
 166 // ---------------------------------------------------------------------------
 167 // wxDataOutputStream
 168 // ---------------------------------------------------------------------------
 169
 170 wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 171   : m_output(&s), m_be_order(FALSE)
 172 {
 173 }
 174
 175 wxDataOutputStream::~wxDataOutputStream()
 176 {
 177 }
 178
 179 void wxDataOutputStream::Write32(wxUint32 i)
 180 {
 181   wxUint32 i32;
 182
 183   if (m_be_order)
 184     i32 = wxUINT32_SWAP_ON_LE(i);
 185   else
 186     i32 = wxUINT32_SWAP_ON_BE(i);
 187   m_output->Write(&i32, 4);
 188 }
 189
 190 void wxDataOutputStream::Write16(wxUint16 i)
 191 {
 192   wxUint16 i16;
 193
 194   if (m_be_order)
 195     i16 = wxUINT16_SWAP_ON_LE(i);
 196   else
 197     i16 = wxUINT16_SWAP_ON_BE(i);
 198
 199   m_output->Write(&i16, 2);
 200 }
 201
 202 void wxDataOutputStream::Write8(wxUint8 i)
 203 {
 204   m_output->Write(&i, 1);
 205 }
 206
 207 void wxDataOutputStream::WriteString(const wxString& string)
 208 {
 209   const wxWX2MBbuf buf = string.mb_str();
 210   Write32(string.Len());
 211   if (string.Len() > 0)
 212       m_output->Write(buf, string.Len());
 213 }
 214
 215 // Must be at global scope for VC++ 5
 216 extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);
 217
 218 void wxDataOutputStream::WriteDouble(double d)
 219 {
 220   char buf[10];
 221
 222 #if wxUSE_APPLE_IEEE
 223   ConvertToIeeeExtended(d, (unsigned char *)buf);
 224 #else
 225 #ifndef __VMS__
 226 # pragma warning "wxDataOutputStream::WriteDouble() not using IeeeExtended - will not work!"
 227 #endif
 228    buf[0] = '\0';
 229 #endif
 230   m_output->Write(buf, 10);
 231 }
 232
 233 wxDataOutputStream& wxDataOutputStream::operator<<(const wxChar *string)
 234 {
 235   Write32(wxStrlen(string));
 236   m_output->Write((const char *)string, wxStrlen(string)*sizeof(wxChar));
 237   return *this;
 238 }
 239
 240 wxDataOutputStream& wxDataOutputStream::operator<<(const wxString& string)
 241 {
 242   WriteString(string);
 243   return *this;
 244 }
 245
 246 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt8 c)
 247 {
 248   Write8((wxUint8)c);
 249   return *this;
 250 }
 251
 252 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt16 i)
 253 {
 254   Write16((wxUint16)i);
 255   return *this;
 256 }
 257
 258 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt32 i)
 259 {
 260   Write32((wxUint32)i);
 261   return *this;
 262 }
 263
 264 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint8 c)
 265 {
 266   Write8(c);
 267   return *this;
 268 }
 269
 270 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint16 i)
 271 {
 272   Write16(i);
 273   return *this;
 274 }
 275
 276 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint32 i)
 277 {
 278   Write32(i);
 279   return *this;
 280 }
 281
 282 wxDataOutputStream& wxDataOutputStream::operator<<(double f)
 283 {
 284   WriteDouble(f);
 285   return *this;
 286 }
 287
 288 wxDataOutputStream& wxDataOutputStream::operator<<(float f)
 289 {
 290   WriteDouble((double)f);
 291   return *this;
 292 }
 293
 294 #endif
 295   // wxUSE_STREAMS
 296