src/common/txtstrm.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        txtstrm.cpp
   3 // Purpose:     Text 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 licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "txtstrm.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/txtstrm.h"
  26 #include <ctype.h>
  27
  28
  29 // ----------------------------------------------------------------------------
  30 // constants
  31 // ----------------------------------------------------------------------------
  32
  33 // Unix: "\n"
  34 // Dos:  "\r\n"
  35 // Mac:  "\r"
  36
  37 // ----------------------------------------------------------------------------
  38 // wxTextInputStream
  39 // ----------------------------------------------------------------------------
  40
  41 #if wxUSE_UNICODE
  42 wxTextInputStream::wxTextInputStream(wxInputStream &s, const wxString &sep, wxMBConv& conv)
  43   : m_input(s), m_separators(sep), m_conv(conv)
  44 {
  45     memset((void*)m_lastBytes, 0, 10);
  46 }
  47 #else
  48 wxTextInputStream::wxTextInputStream(wxInputStream &s, const wxString &sep)
  49   : m_input(s), m_separators(sep)
  50 {
  51     memset((void*)m_lastBytes, 0, 10);
  52 }
  53 #endif
  54
  55 wxTextInputStream::~wxTextInputStream()
  56 {
  57 }
  58
  59 void wxTextInputStream::UngetLast()
  60 {
  61     size_t byteCount = 0;
  62     while(m_lastBytes[byteCount]) // pseudo ANSI strlen (even for Unicode!)
  63         byteCount++;
  64     m_input.Ungetch(m_lastBytes, byteCount);
  65     memset((void*)m_lastBytes, 0, 10);
  66 }
  67
  68 wxChar wxTextInputStream::NextChar()
  69 {
  70 #if wxUSE_UNICODE
  71     wxChar wbuf[2];
  72     memset((void*)m_lastBytes, 0, 10);
  73     for(size_t inlen = 0; inlen < 9; inlen++)
  74     {
  75         // actually read the next character
  76         m_lastBytes[inlen] = m_input.GetC();
  77
  78         if(m_input.LastRead() <= 0)
  79             return wxEOT;
  80
  81         int retlen = (int) m_conv.MB2WC(wbuf, m_lastBytes, 2); // returns -1 for failure
  82         if(retlen >= 0) // res == 0 could happen for '\0' char
  83             return wbuf[0];
  84     }
  85     // there should be no encoding which requires more than nine bytes for one character...
  86     return wxEOT;
  87 #else
  88     m_lastBytes[0] = m_input.GetC();
  89
  90     if(m_input.LastRead() <= 0)
  91         return wxEOT;
  92
  93     return m_lastBytes[0];
  94 #endif
  95
  96 }
  97
  98 wxChar wxTextInputStream::NextNonSeparators()
  99 {
 100     for (;;)
 101     {
 102         wxChar c = NextChar();
 103         if (c == wxEOT) return (wxChar) 0;
 104
 105         if (c != wxT('\n') &&
 106             c != wxT('\r') &&
 107             !m_separators.Contains(c))
 108           return c;
 109     }
 110
 111 }
 112
 113 bool wxTextInputStream::EatEOL(const wxChar &c)
 114 {
 115     if (c == wxT('\n')) return true; // eat on UNIX
 116
 117     if (c == wxT('\r')) // eat on both Mac and DOS
 118     {
 119         wxChar c2 = NextChar();
 120         if(c2 == wxEOT) return true; // end of stream reached, had enough :-)
 121
 122         if (c2 != wxT('\n')) UngetLast(); // Don't eat on Mac
 123         return true;
 124     }
 125
 126     return false;
 127 }
 128
 129 wxUint32 wxTextInputStream::Read32(int base)
 130 {
 131     wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
 132     if(!m_input) return 0;
 133
 134     wxString word = ReadWord();
 135     if(word.IsEmpty())
 136         return 0;
 137     return wxStrtoul(word.c_str(), 0, base);
 138 }
 139
 140 wxUint16 wxTextInputStream::Read16(int base)
 141 {
 142     return (wxUint16)Read32(base);
 143 }
 144
 145 wxUint8 wxTextInputStream::Read8(int base)
 146 {
 147     return (wxUint8)Read32(base);
 148 }
 149
 150 wxInt32 wxTextInputStream::Read32S(int base)
 151 {
 152     wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
 153     if(!m_input) return 0;
 154
 155     wxString word = ReadWord();
 156     if(word.IsEmpty())
 157         return 0;
 158     return wxStrtol(word.c_str(), 0, base);
 159 }
 160
 161 wxInt16 wxTextInputStream::Read16S(int base)
 162 {
 163     return (wxInt16)Read32S(base);
 164 }
 165
 166 wxInt8 wxTextInputStream::Read8S(int base)
 167 {
 168     return (wxInt8)Read32S(base);
 169 }
 170
 171 double wxTextInputStream::ReadDouble()
 172 {
 173     if(!m_input) return 0;
 174     wxString word = ReadWord();
 175     if(word.IsEmpty())
 176         return 0;
 177     return wxStrtod(word.c_str(), 0);
 178 }
 179
 180 wxString wxTextInputStream::ReadString()
 181 {
 182     return ReadLine();
 183 }
 184
 185 wxString wxTextInputStream::ReadLine()
 186 {
 187     wxString line;
 188
 189     while ( !m_input.Eof() )
 190     {
 191         wxChar c = NextChar();
 192         if(c == wxEOT)
 193             break;
 194
 195         if ( !m_input )
 196             break;
 197
 198         if (EatEOL(c))
 199             break;
 200
 201         line += c;
 202     }
 203
 204     return line;
 205 }
 206
 207 wxString wxTextInputStream::ReadWord()
 208 {
 209     wxString word;
 210
 211     if ( !m_input )
 212         return word;
 213
 214     wxChar c = NextNonSeparators();
 215     if ( !c )
 216         return word;
 217
 218     word += c;
 219
 220     while ( !m_input.Eof() )
 221     {
 222         c = NextChar();
 223         if(c == wxEOT)
 224             break;
 225
 226         if (m_separators.Contains(c))
 227             break;
 228
 229         if (EatEOL(c))
 230             break;
 231
 232         word += c;
 233     }
 234
 235     return word;
 236 }
 237
 238 wxTextInputStream& wxTextInputStream::operator>>(wxString& word)
 239 {
 240     word = ReadWord();
 241     return *this;
 242 }
 243
 244 wxTextInputStream& wxTextInputStream::operator>>(char& c)
 245 {
 246     c = m_input.GetC();
 247     if(m_input.LastRead() <= 0) c = 0;
 248
 249     if (EatEOL(c))
 250         c = '\n';
 251
 252     return *this;
 253 }
 254
 255 wxTextInputStream& wxTextInputStream::operator>>(wxInt16& i)
 256 {
 257     i = (wxInt16)Read16();
 258     return *this;
 259 }
 260
 261 wxTextInputStream& wxTextInputStream::operator>>(wxInt32& i)
 262 {
 263     i = (wxInt32)Read32();
 264     return *this;
 265 }
 266
 267 wxTextInputStream& wxTextInputStream::operator>>(wxUint16& i)
 268 {
 269     i = Read16();
 270     return *this;
 271 }
 272
 273 wxTextInputStream& wxTextInputStream::operator>>(wxUint32& i)
 274 {
 275     i = Read32();
 276     return *this;
 277 }
 278
 279 wxTextInputStream& wxTextInputStream::operator>>(double& i)
 280 {
 281     i = ReadDouble();
 282     return *this;
 283 }
 284
 285 wxTextInputStream& wxTextInputStream::operator>>(float& f)
 286 {
 287     f = (float)ReadDouble();
 288     return *this;
 289 }
 290
 291
 292
 293 #if wxUSE_UNICODE
 294 wxTextOutputStream::wxTextOutputStream(wxOutputStream& s, wxEOL mode, wxMBConv& conv)
 295   : m_output(s), m_conv(conv)
 296 #else
 297 wxTextOutputStream::wxTextOutputStream(wxOutputStream& s, wxEOL mode)
 298   : m_output(s)
 299 #endif
 300 {
 301     m_mode = mode;
 302     if (m_mode == wxEOL_NATIVE)
 303     {
 304 #if defined(__WXMSW__) || defined(__WXPM__)
 305         m_mode = wxEOL_DOS;
 306 #elif defined(__WXMAC__) && !defined(__DARWIN__)
 307         m_mode = wxEOL_MAC;
 308 #else
 309         m_mode = wxEOL_UNIX;
 310 #endif
 311     }
 312 }
 313
 314 wxTextOutputStream::~wxTextOutputStream()
 315 {
 316 }
 317
 318 void wxTextOutputStream::SetMode(wxEOL mode)
 319 {
 320     m_mode = mode;
 321     if (m_mode == wxEOL_NATIVE)
 322     {
 323 #if defined(__WXMSW__) || defined(__WXPM__)
 324         m_mode = wxEOL_DOS;
 325 #elif defined(__WXMAC__) && !defined(__DARWIN__)
 326         m_mode = wxEOL_MAC;
 327 #else
 328         m_mode = wxEOL_UNIX;
 329 #endif
 330     }
 331 }
 332
 333 void wxTextOutputStream::Write32(wxUint32 i)
 334 {
 335     wxString str;
 336     str.Printf(wxT("%u"), i);
 337
 338     WriteString(str);
 339 }
 340
 341 void wxTextOutputStream::Write16(wxUint16 i)
 342 {
 343     wxString str;
 344     str.Printf(wxT("%u"), i);
 345
 346     WriteString(str);
 347 }
 348
 349 void wxTextOutputStream::Write8(wxUint8 i)
 350 {
 351     wxString str;
 352     str.Printf(wxT("%u"), i);
 353
 354     WriteString(str);
 355 }
 356
 357 void wxTextOutputStream::WriteDouble(double d)
 358 {
 359     wxString str;
 360
 361     str.Printf(wxT("%f"), d);
 362     WriteString(str);
 363 }
 364
 365 void wxTextOutputStream::WriteString(const wxString& string)
 366 {
 367     size_t len = string.length();
 368
 369     wxString out;
 370     out.reserve(len);
 371
 372     for ( size_t i = 0; i < len; i++ )
 373     {
 374         const wxChar c = string[i];
 375         if ( c == wxT('\n') )
 376         {
 377             switch ( m_mode )
 378             {
 379                 case wxEOL_DOS:
 380                     out << _T("\r\n");
 381                     continue;
 382
 383                 case wxEOL_MAC:
 384                     out << _T('\r');
 385                     continue;
 386
 387                 default:
 388                     wxFAIL_MSG( _T("unknown EOL mode in wxTextOutputStream") );
 389                     // fall through
 390
 391                 case wxEOL_UNIX:
 392                     // don't treat '\n' specially
 393                     ;
 394             }
 395         }
 396
 397         out << c;
 398    }
 399
 400     // We must not write the trailing NULL here
 401 #if wxUSE_UNICODE
 402     wxCharBuffer buffer = m_conv.cWC2MB( out );
 403     m_output.Write( (const char*) buffer, strlen( (const char*) buffer ) );
 404 #else
 405     m_output.Write(out.c_str(), out.length() );
 406 #endif
 407 }
 408
 409 wxTextOutputStream& wxTextOutputStream::operator<<(const wxChar *string)
 410 {
 411     WriteString( wxString(string) );
 412     return *this;
 413 }
 414
 415 wxTextOutputStream& wxTextOutputStream::operator<<(const wxString& string)
 416 {
 417     WriteString( string );
 418     return *this;
 419 }
 420
 421 wxTextOutputStream& wxTextOutputStream::operator<<(char c)
 422 {
 423     WriteString( wxString::FromAscii(c) );
 424
 425     return *this;
 426 }
 427
 428 #if wxUSE_UNICODE && wxWCHAR_T_IS_REAL_TYPE
 429
 430 wxTextOutputStream& wxTextOutputStream::operator<<(wchar_t wc)
 431 {
 432     WriteString( wxString(&wc, m_conv, 1) );
 433
 434     return *this;
 435 }
 436
 437 #endif // wxUSE_UNICODE
 438
 439 wxTextOutputStream& wxTextOutputStream::operator<<(wxInt16 c)
 440 {
 441     wxString str;
 442     str.Printf(wxT("%d"), (signed int)c);
 443     WriteString(str);
 444
 445     return *this;
 446 }
 447
 448 wxTextOutputStream& wxTextOutputStream::operator<<(wxInt32 c)
 449 {
 450     wxString str;
 451     str.Printf(wxT("%ld"), (signed long)c);
 452     WriteString(str);
 453
 454     return *this;
 455 }
 456
 457 wxTextOutputStream& wxTextOutputStream::operator<<(wxUint16 c)
 458 {
 459     wxString str;
 460     str.Printf(wxT("%u"), (unsigned int)c);
 461     WriteString(str);
 462
 463     return *this;
 464 }
 465
 466 wxTextOutputStream& wxTextOutputStream::operator<<(wxUint32 c)
 467 {
 468     wxString str;
 469     str.Printf(wxT("%lu"), (unsigned long)c);
 470     WriteString(str);
 471
 472     return *this;
 473 }
 474
 475 wxTextOutputStream &wxTextOutputStream::operator<<(double f)
 476 {
 477     WriteDouble(f);
 478     return *this;
 479 }
 480
 481 wxTextOutputStream& wxTextOutputStream::operator<<(float f)
 482 {
 483     WriteDouble((double)f);
 484     return *this;
 485 }
 486
 487 wxTextOutputStream &endl( wxTextOutputStream &stream )
 488 {
 489     return stream << wxT('\n');
 490 }
 491
 492 #endif
 493   // wxUSE_STREAMS