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 license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  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 wxTextInputStream::wxTextInputStream(wxInputStream &s, const wxString &sep)
  42   : m_input(s), m_separators(sep)
  43 {
  44 }
  45
  46 wxTextInputStream::~wxTextInputStream()
  47 {
  48 }
  49
  50 wxChar wxTextInputStream::NextNonSeparators()
  51 {
  52     wxChar c = (wxChar) 0;
  53     for (;;)
  54     {
  55         if (!m_input) return (wxChar) 0;
  56         c = m_input.GetC();
  57
  58         if (c != wxT('\n') &&
  59             c != wxT('\r') &&
  60             !m_separators.Contains(c))
  61           return c;
  62     }
  63
  64 }
  65
  66 bool wxTextInputStream::EatEOL(const wxChar &c)
  67 {
  68     if (c == wxT('\n')) return TRUE; // eat on UNIX
  69
  70     if (c == wxT('\r')) // eat on both Mac and DOS
  71     {
  72         if (!m_input) return TRUE;
  73         wxChar c2 = m_input.GetC();
  74
  75         if (c2 != wxT('\n'))  m_input.Ungetch( c2 ); // Don't eat on Mac
  76         return TRUE;
  77     }
  78
  79     return FALSE;
  80 }
  81
  82 void wxTextInputStream::SkipIfEndOfLine( wxChar c )
  83 {
  84     if (EatEOL(c)) return;
  85     else m_input.Ungetch( c );  // no line terminator
  86 }
  87
  88 wxUint32 wxTextInputStream::Read32()
  89 {
  90     /* I only implemented a simple integer parser */
  91     // VZ: what about using strtol()?? (TODO)
  92
  93     int sign;
  94     wxInt32 i;
  95
  96     if (!m_input) return 0;
  97     int c = NextNonSeparators();
  98     if (c==(wxChar)0) return 0;
  99
 100     i = 0;
 101     if (! (c == wxT('-') || c == wxT('+') || isdigit(c)) )
 102     {
 103         m_input.Ungetch(c);
 104         return 0;
 105     }
 106
 107     if (c == wxT('-'))
 108     {
 109         sign = -1;
 110         c = m_input.GetC();
 111     } else
 112     if (c == wxT('+'))
 113     {
 114         sign = 1;
 115         c = m_input.GetC();
 116     } else
 117     {
 118         sign = 1;
 119     }
 120
 121     while (isdigit(c))
 122     {
 123         i = i*10 + (c - (int)wxT('0'));
 124         c = m_input.GetC();
 125     }
 126
 127     SkipIfEndOfLine( c );
 128
 129     i *= sign;
 130
 131     return (wxUint32)i;
 132 }
 133
 134 wxUint16 wxTextInputStream::Read16()
 135 {
 136     return (wxUint16)Read32();
 137 }
 138
 139 wxUint8 wxTextInputStream::Read8()
 140 {
 141     return (wxUint8)Read32();
 142 }
 143
 144 double wxTextInputStream::ReadDouble()
 145 {
 146     /* I only implemented a simple float parser
 147      * VZ: what about using strtod()?? (TODO)
 148      */
 149
 150     double f;
 151     int theSign;
 152
 153     if (!m_input)
 154         return 0;
 155
 156     int c = NextNonSeparators();
 157     if (c==(wxChar)0) return 0;
 158
 159     f = 0.0;
 160     if (! (c == wxT('.') || c == wxT(',') || c == wxT('-') || c == wxT('+') || isdigit(c)) )
 161     {
 162         m_input.Ungetch(c);
 163         return 0;
 164     }
 165
 166     if (c == wxT('-'))
 167     {
 168         theSign = -1;
 169         c = m_input.GetC();
 170     } else
 171     if (c == wxT('+'))
 172     {
 173         theSign = 1;
 174         c = m_input.GetC();
 175     }
 176     else
 177     {
 178         theSign = 1;
 179     }
 180
 181     while (isdigit(c))
 182     {
 183         f = f*10 + (c - wxT('0'));
 184         c = m_input.GetC();
 185     }
 186
 187     if (c == wxT('.') || c == wxT(','))
 188     {
 189         double f_multiplicator = (double) 0.1;
 190
 191         c = m_input.GetC();
 192
 193         while (isdigit(c))
 194         {
 195             f += (c-wxT('0'))*f_multiplicator;
 196             f_multiplicator /= 10;
 197             c = m_input.GetC();
 198         }
 199
 200         if (c == wxT('e'))
 201         {
 202             double f_multiplicator = 0.0;
 203             int i, e;
 204
 205             c = m_input.GetC();
 206
 207             switch (c)
 208             {
 209                 case wxT('-'): f_multiplicator = 0.1;  break;
 210                 case wxT('+'): f_multiplicator = 10.0; break;
 211             }
 212
 213             e = Read8();  // why only max 256 ?
 214
 215             for (i=0;i<e;i++)
 216                 f *= f_multiplicator;
 217         }
 218         else
 219             SkipIfEndOfLine( c );
 220     }
 221     else
 222     {
 223         m_input.Ungetch(c);
 224     }
 225
 226     f *= theSign;
 227     return f;
 228 }
 229
 230 wxString wxTextInputStream::ReadString()
 231 {
 232     return ReadLine();
 233 }
 234
 235 wxString wxTextInputStream::ReadLine()
 236 {
 237     wxChar c;
 238     wxString line;
 239
 240     while ( !m_input.Eof() )
 241     {
 242         c = m_input.GetC();
 243
 244         if ( !m_input )
 245             break;
 246
 247         if (EatEOL(c))
 248             break;
 249
 250         line += c;
 251     }
 252
 253     return line;
 254 }
 255
 256 wxString wxTextInputStream::ReadWord()
 257 {
 258     wxString word;
 259
 260     if ( !m_input )
 261         return word;
 262
 263     wxChar c = NextNonSeparators();
 264     if ( !c )
 265         return word;
 266
 267     word += c;
 268
 269     while ( !m_input.Eof() )
 270     {
 271         c = m_input.GetC();
 272
 273         if (!m_input)
 274             break;
 275
 276         if (m_separators.Contains(c))
 277             break;
 278
 279         if (EatEOL(c))
 280             break;
 281
 282         word += c;
 283     }
 284
 285     return word;
 286 }
 287
 288 wxTextInputStream& wxTextInputStream::operator>>(wxString& word)
 289 {
 290     word = ReadWord();
 291     return *this;
 292 }
 293
 294 wxTextInputStream& wxTextInputStream::operator>>(char& c)
 295 {
 296     if (!m_input)
 297     {
 298         c = 0;
 299         return *this;
 300     }
 301
 302     c = m_input.GetC();
 303
 304     if (EatEOL(c))
 305         c = '\n';
 306
 307     return *this;
 308 }
 309
 310 wxTextInputStream& wxTextInputStream::operator>>(wxInt16& i)
 311 {
 312     i = (wxInt16)Read16();
 313     return *this;
 314 }
 315
 316 wxTextInputStream& wxTextInputStream::operator>>(wxInt32& i)
 317 {
 318     i = (wxInt32)Read32();
 319     return *this;
 320 }
 321
 322 wxTextInputStream& wxTextInputStream::operator>>(wxUint16& i)
 323 {
 324     i = Read16();
 325     return *this;
 326 }
 327
 328 wxTextInputStream& wxTextInputStream::operator>>(wxUint32& i)
 329 {
 330     i = Read32();
 331     return *this;
 332 }
 333
 334 wxTextInputStream& wxTextInputStream::operator>>(double& i)
 335 {
 336     i = ReadDouble();
 337     return *this;
 338 }
 339
 340 wxTextInputStream& wxTextInputStream::operator>>(float& f)
 341 {
 342     f = (float)ReadDouble();
 343     return *this;
 344 }
 345
 346 wxTextOutputStream::wxTextOutputStream(wxOutputStream& s, wxEOL mode)
 347   : m_output(s)
 348 {
 349     m_mode = mode;
 350     if (m_mode == wxEOL_NATIVE)
 351     {
 352 #if defined(__WXMSW__) || defined(__WXPM__)
 353         m_mode = wxEOL_DOS;
 354 #elif defined(__WXMAC__) && !defined(__DARWIN__)
 355         m_mode = wxEOL_MAC;
 356 #else
 357         m_mode = wxEOL_UNIX;
 358 #endif
 359     }
 360 }
 361
 362 wxTextOutputStream::~wxTextOutputStream()
 363 {
 364 }
 365
 366 void wxTextOutputStream::SetMode(wxEOL mode)
 367 {
 368     m_mode = mode;
 369     if (m_mode == wxEOL_NATIVE)
 370     {
 371 #if defined(__WXMSW__) || defined(__WXPM__)
 372         m_mode = wxEOL_DOS;
 373 #elif defined(__WXMAC__) && !defined(__DARWIN__)
 374         m_mode = wxEOL_MAC;
 375 #else
 376         m_mode = wxEOL_UNIX;
 377 #endif
 378     }
 379 }
 380
 381 void wxTextOutputStream::Write32(wxUint32 i)
 382 {
 383     wxString str;
 384     str.Printf(wxT("%u"), i);
 385
 386     WriteString(str);
 387 }
 388
 389 void wxTextOutputStream::Write16(wxUint16 i)
 390 {
 391     wxString str;
 392     str.Printf(wxT("%u"), i);
 393
 394     WriteString(str);
 395 }
 396
 397 void wxTextOutputStream::Write8(wxUint8 i)
 398 {
 399     wxString str;
 400     str.Printf(wxT("%u"), i);
 401
 402     WriteString(str);
 403 }
 404
 405 void wxTextOutputStream::WriteDouble(double d)
 406 {
 407     wxString str;
 408
 409     str.Printf(wxT("%f"), d);
 410     WriteString(str);
 411 }
 412
 413 void wxTextOutputStream::WriteString(const wxString& string)
 414 {
 415     size_t len = string.length();
 416
 417     wxString out;
 418     out.reserve(len);
 419
 420     for ( size_t i = 0; i < len; i++ )
 421     {
 422         const wxChar c = string[i];
 423         if ( c == wxT('\n') )
 424         {
 425             switch ( m_mode )
 426             {
 427                 case wxEOL_DOS:
 428                     out << _T("\r\n");
 429                     continue;
 430
 431                 case wxEOL_MAC:
 432                     out << _T('\r');
 433                     continue;
 434
 435                 default:
 436                     wxFAIL_MSG( _T("unknown EOL mode in wxTextOutputStream") );
 437                     // fall through
 438
 439                 case wxEOL_UNIX:
 440                     // don't treat '\n' specially
 441                     ;
 442             }
 443         }
 444
 445         out << c;
 446    }
 447
 448     // NB: we don't need to write the trailing NUL here
 449     m_output.Write(out.c_str(), out.length() * sizeof(wxChar));
 450 }
 451
 452 wxTextOutputStream& wxTextOutputStream::operator<<(const wxChar *string)
 453 {
 454     WriteString( wxString(string) );
 455     return *this;
 456 }
 457
 458 wxTextOutputStream& wxTextOutputStream::operator<<(const wxString& string)
 459 {
 460     WriteString( string );
 461     return *this;
 462 }
 463
 464 wxTextOutputStream& wxTextOutputStream::operator<<(char c)
 465 {
 466     // these strange manipulations are needed in Unicode mode
 467     char buf[2];
 468     buf[0] = c;
 469     buf[1] = 0;
 470
 471     WriteString( wxString(buf) );
 472     return *this;
 473 }
 474
 475 wxTextOutputStream& wxTextOutputStream::operator<<(wxInt16 c)
 476 {
 477     wxString str;
 478     str.Printf(wxT("%d"), (signed int)c);
 479     WriteString(str);
 480
 481     return *this;
 482 }
 483
 484 wxTextOutputStream& wxTextOutputStream::operator<<(wxInt32 c)
 485 {
 486     wxString str;
 487     str.Printf(wxT("%ld"), (signed long)c);
 488     WriteString(str);
 489
 490     return *this;
 491 }
 492
 493 wxTextOutputStream& wxTextOutputStream::operator<<(wxUint16 c)
 494 {
 495     wxString str;
 496     str.Printf(wxT("%u"), (unsigned int)c);
 497     WriteString(str);
 498
 499     return *this;
 500 }
 501
 502 wxTextOutputStream& wxTextOutputStream::operator<<(wxUint32 c)
 503 {
 504     wxString str;
 505     str.Printf(wxT("%lu"), (unsigned long)c);
 506     WriteString(str);
 507
 508     return *this;
 509 }
 510
 511 wxTextOutputStream &wxTextOutputStream::operator<<(double f)
 512 {
 513     WriteDouble(f);
 514     return *this;
 515 }
 516
 517 wxTextOutputStream& wxTextOutputStream::operator<<(float f)
 518 {
 519     WriteDouble((double)f);
 520     return *this;
 521 }
 522
 523 wxTextOutputStream &endl( wxTextOutputStream &stream )
 524 {
 525     return stream << wxT('\n');
 526 }
 527
 528 #endif
 529   // wxUSE_STREAMS