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   wxString s;
  90   size_t len;
  91
  92   len = Read32();
  93
  94   m_input->Read(s.GetWriteBuf(len), len);
  95   s.UngetWriteBuf();
  96
  97   return s;
  98 }
  99
 100 wxDataInputStream& wxDataInputStream::operator>>(wxString& s)
 101 {
 102   s = ReadString();
 103   return *this;
 104 }
 105
 106 wxDataInputStream& wxDataInputStream::operator>>(wxInt8& c)
 107 {
 108   c = (wxInt8)Read8();
 109   return *this;
 110 }
 111
 112 wxDataInputStream& wxDataInputStream::operator>>(wxInt16& i)
 113 {
 114   i = (wxInt16)Read16();
 115   return *this;
 116 }
 117
 118 wxDataInputStream& wxDataInputStream::operator>>(wxInt32& i)
 119 {
 120   i = (wxInt32)Read32();
 121   return *this;
 122 }
 123
 124 wxDataInputStream& wxDataInputStream::operator>>(wxUint8& c)
 125 {
 126   c = Read8();
 127   return *this;
 128 }
 129
 130 wxDataInputStream& wxDataInputStream::operator>>(wxUint16& i)
 131 {
 132   i = Read16();
 133   return *this;
 134 }
 135
 136 wxDataInputStream& wxDataInputStream::operator>>(wxUint32& i)
 137 {
 138   i = Read32();
 139   return *this;
 140 }
 141
 142 wxDataInputStream& wxDataInputStream::operator>>(double& i)
 143 {
 144   i = ReadDouble();
 145   return *this;
 146 }
 147
 148 wxDataInputStream& wxDataInputStream::operator>>(float& f)
 149 {
 150   f = (float)ReadDouble();
 151   return *this;
 152 }
 153
 154 // ---------------------------------------------------------------------------
 155 // wxDataOutputStream
 156 // ---------------------------------------------------------------------------
 157
 158 wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 159   : m_output(&s), m_be_order(FALSE)
 160 {
 161 }
 162
 163 wxDataOutputStream::~wxDataOutputStream()
 164 {
 165 }
 166
 167 void wxDataOutputStream::Write32(wxUint32 i)
 168 {
 169   wxUint32 i32;
 170
 171   if (m_be_order)
 172     i32 = wxUINT32_SWAP_ON_LE(i);
 173   else
 174     i32 = wxUINT32_SWAP_ON_BE(i);
 175   m_output->Write(&i32, 4);
 176 }
 177
 178 void wxDataOutputStream::Write16(wxUint16 i)
 179 {
 180   wxUint16 i16;
 181
 182   if (m_be_order)
 183     i16 = wxUINT16_SWAP_ON_LE(i);
 184   else
 185     i16 = wxUINT16_SWAP_ON_BE(i);
 186
 187   m_output->Write(&i16, 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   const wxWX2MBbuf buf = string.mb_str();
 198   Write32(string.Length());
 199   m_output->Write(buf, string.Len());
 200 }
 201
 202 // Must be at global scope for VC++ 5
 203 extern "C" void ConvertToIeeeExtended(double num, unsigned char *bytes);
 204
 205 void wxDataOutputStream::WriteDouble(double d)
 206 {
 207   char buf[10];
 208
 209 #if wxUSE_APPLE_IEEE
 210   ConvertToIeeeExtended(d, (unsigned char *)buf);
 211 #else
 212 #ifndef __VMS__
 213 # pragma warning "wxDataOutputStream::WriteDouble() not using IeeeExtended - will not work!"
 214 #endif
 215    buf[0] = '\0';
 216 #endif
 217   m_output->Write(buf, 10);
 218 }
 219
 220 wxDataOutputStream& wxDataOutputStream::operator<<(const wxChar *string)
 221 {
 222   Write32(wxStrlen(string));
 223   m_output->Write((const char *)string, wxStrlen(string)*sizeof(wxChar));
 224   return *this;
 225 }
 226
 227 wxDataOutputStream& wxDataOutputStream::operator<<(wxString& string)
 228 {
 229   WriteString(string);
 230   return *this;
 231 }
 232
 233 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt8 c)
 234 {
 235   Write8((wxUint8)c);
 236   return *this;
 237 }
 238
 239 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt16 i)
 240 {
 241   Write16((wxUint16)i);
 242   return *this;
 243 }
 244
 245 wxDataOutputStream& wxDataOutputStream::operator<<(wxInt32 i)
 246 {
 247   Write32((wxUint32)i);
 248   return *this;
 249 }
 250
 251 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint8 c)
 252 {
 253   Write8(c);
 254   return *this;
 255 }
 256
 257 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint16 i)
 258 {
 259   Write16(i);
 260   return *this;
 261 }
 262
 263 wxDataOutputStream& wxDataOutputStream::operator<<(wxUint32 i)
 264 {
 265   Write32(i);
 266   return *this;
 267 }
 268
 269 wxDataOutputStream& wxDataOutputStream::operator<<(double f)
 270 {
 271   WriteDouble(f);
 272   return *this;
 273 }
 274
 275 wxDataOutputStream& wxDataOutputStream::operator<<(float f)
 276 {
 277   WriteDouble((double)f);
 278   return *this;
 279 }
 280
 281 #endif
 282   // wxUSE_STREAMS
 283