src/common/uri.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        uri.cpp
   3 // Purpose:     Implementation of a uri parser
   4 // Author:      Ryan Norton
   5 // Created:     10/26/04
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2004 Ryan Norton
   8 // Licence:     wxWindows
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ===========================================================================
  12 // declarations
  13 // ===========================================================================
  14
  15 // ---------------------------------------------------------------------------
  16 // headers
  17 // ---------------------------------------------------------------------------
  18
  19 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  20     #pragma implementation "uri.h"
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27     #pragma hdrstop
  28 #endif
  29
  30 #include "wx/uri.h"
  31
  32 // ---------------------------------------------------------------------------
  33 // definitions
  34 // ---------------------------------------------------------------------------
  35
  36 IMPLEMENT_CLASS(wxURI, wxObject);
  37
  38 // ===========================================================================
  39 // implementation
  40 // ===========================================================================
  41
  42 // ---------------------------------------------------------------------------
  43 // utilities
  44 // ---------------------------------------------------------------------------
  45
  46 // ---------------------------------------------------------------------------
  47 //
  48 //                        wxURI
  49 //
  50 // ---------------------------------------------------------------------------
  51
  52 // ---------------------------------------------------------------------------
  53 //  Constructors
  54 // ---------------------------------------------------------------------------
  55
  56 wxURI::wxURI() : m_hostType(wxURI_REGNAME), m_fields(0)
  57 {
  58 }
  59
  60 wxURI::wxURI(const wxString& uri) : m_hostType(wxURI_REGNAME), m_fields(0)
  61 {
  62     Create(uri);
  63 }
  64
  65 wxURI::wxURI(const wxURI& uri)  : m_hostType(wxURI_REGNAME), m_fields(0)
  66 {
  67     Assign(uri);
  68 }
  69
  70 // ---------------------------------------------------------------------------
  71 // Destructor and cleanup
  72 // ---------------------------------------------------------------------------
  73
  74 wxURI::~wxURI()
  75 {
  76     Clear();
  77 }
  78
  79 void wxURI::Clear()
  80 {
  81     m_scheme = m_user = m_server = m_port = m_path =
  82     m_query = m_fragment = wxT("");
  83
  84     m_hostType = wxURI_REGNAME;
  85
  86     m_fields = 0;
  87 }
  88
  89 // ---------------------------------------------------------------------------
  90 // Create
  91 //
  92 // This creates the URI - all we do here is call the main parsing method
  93 // ---------------------------------------------------------------------------
  94
  95 const wxChar* wxURI::Create(const wxString& uri)
  96 {
  97     if (m_fields)
  98         Clear();
  99
 100     return Parse(uri);
 101 }
 102
 103 // ---------------------------------------------------------------------------
 104 // Escape Methods
 105 //
 106 // TranslateEscape unencodes a 3 character URL escape sequence
 107 //
 108 // Escape encodes an invalid URI character into a 3 character sequence
 109 //
 110 // IsEscape determines if the input string contains an escape sequence,
 111 // if it does, then it moves the input string past the escape sequence
 112 //
 113 // Unescape unencodes all 3 character URL escape sequences in a wxString
 114 // ---------------------------------------------------------------------------
 115
 116 wxChar wxURI::TranslateEscape(const wxChar* s)
 117 {
 118     wxASSERT_MSG(IsHex(*s) && IsHex(*(s+1)), wxT("Invalid escape!"));
 119
 120     return CharToHex(*s) * 0x10 + CharToHex(*++s);
 121 }
 122
 123 wxString wxURI::Unescape(const wxString& uri)
 124 {
 125     wxString new_uri;
 126
 127     for(size_t i = 0; i < uri.length(); ++i)
 128     {
 129         if (uri[i] == wxT('%'))
 130         {
 131             new_uri += wxURI::TranslateEscape( &(uri.c_str()[i+1]) );
 132             i += 2;
 133         }
 134     }
 135
 136     return new_uri;
 137 }
 138
 139 void wxURI::Escape(wxString& s, const wxChar& c)
 140 {
 141     const wxChar* hdig = wxT("0123456789abcdef");
 142     s += wxT('%');
 143     s += hdig[(c >> 4) & 15];
 144         s += hdig[c & 15];
 145 }
 146
 147 bool wxURI::IsEscape(const wxChar*& uri)
 148 {
 149     // pct-encoded   = "%" HEXDIG HEXDIG
 150     if(*uri == wxT('%') && IsHex(*(uri+1)) && IsHex(*(uri+2)))
 151     {
 152         uri += 3;
 153         return true;
 154     }
 155     else
 156         return false;
 157 }
 158
 159 // ---------------------------------------------------------------------------
 160 // BuildURI
 161 //
 162 // BuildURI() builds the entire URI into a useable
 163 // representation, including proper identification characters such as slashes
 164 //
 165 // BuildUnescapedURI() does the same thing as BuildURI(), only it unescapes
 166 // the components that accept escape sequences
 167 // ---------------------------------------------------------------------------
 168
 169 wxString wxURI::BuildURI() const
 170 {
 171     wxString ret;
 172
 173     if (HasScheme())
 174         ret = ret + m_scheme + wxT(":");
 175
 176     if (HasServer())
 177     {
 178         ret += wxT("//");
 179
 180         if (HasUser())
 181             ret = ret + m_user + wxT("@");
 182
 183         ret += m_server;
 184
 185         if (HasPort())
 186             ret = ret + wxT(":") + m_port;
 187     }
 188
 189     ret += m_path;
 190
 191     if (HasQuery())
 192         ret = ret + wxT("?") + m_query;
 193
 194     if (HasFragment())
 195         ret = ret + wxT("#") + m_fragment;
 196
 197     return ret;
 198 }
 199
 200 wxString wxURI::BuildUnescapedURI() const
 201 {
 202     wxString ret;
 203
 204     if (HasScheme())
 205         ret = ret + m_scheme + wxT(":");
 206
 207     if (HasServer())
 208     {
 209         ret += wxT("//");
 210
 211         if (HasUser())
 212             ret = ret + wxURI::Unescape(m_user) + wxT("@");
 213
 214         if (m_hostType == wxURI_REGNAME)
 215             ret += wxURI::Unescape(m_server);
 216         else
 217             ret += m_server;
 218
 219         if (HasPort())
 220             ret = ret + wxT(":") + m_port;
 221     }
 222
 223     ret += wxURI::Unescape(m_path);
 224
 225     if (HasQuery())
 226         ret = ret + wxT("?") + wxURI::Unescape(m_query);
 227
 228     if (HasFragment())
 229         ret = ret + wxT("#") + wxURI::Unescape(m_fragment);
 230
 231     return ret;
 232 }
 233
 234 // ---------------------------------------------------------------------------
 235 // Assignment
 236 // ---------------------------------------------------------------------------
 237
 238 wxURI& wxURI::Assign(const wxURI& uri)
 239 {
 240     //assign fields
 241     m_fields = uri.m_fields;
 242
 243     //ref over components
 244     m_scheme = uri.m_scheme;
 245     m_user = uri.m_user;
 246     m_server = uri.m_server;
 247     m_hostType = uri.m_hostType;
 248     m_port = uri.m_port;
 249     m_path = uri.m_path;
 250     m_query = uri.m_query;
 251     m_fragment = uri.m_fragment;
 252
 253     return *this;
 254 }
 255
 256 wxURI& wxURI::operator = (const wxURI& uri)
 257 {
 258     return Assign(uri);
 259 }
 260
 261 wxURI& wxURI::operator = (const wxString& string)
 262 {
 263     Create(string);
 264     return *this;
 265 }
 266
 267 // ---------------------------------------------------------------------------
 268 // Comparison
 269 // ---------------------------------------------------------------------------
 270
 271 bool wxURI::operator == (const wxURI& uri) const
 272 {
 273     if (HasScheme())
 274     {
 275         if(m_scheme != uri.m_scheme)
 276             return false;
 277     }
 278     else if (uri.HasScheme())
 279         return false;
 280
 281
 282     if (HasServer())
 283     {
 284         if (HasUser())
 285         {
 286             if (m_user != uri.m_user)
 287                 return false;
 288         }
 289         else if (uri.HasUser())
 290             return false;
 291
 292         if (m_server != uri.m_server ||
 293             m_hostType != uri.m_hostType)
 294             return false;
 295
 296         if (HasPort())
 297         {
 298             if(m_port != uri.m_port)
 299                 return false;
 300         }
 301         else if (uri.HasPort())
 302             return false;
 303     }
 304     else if (uri.HasServer())
 305         return false;
 306
 307
 308     if (HasPath())
 309     {
 310         if(m_path != uri.m_path)
 311             return false;
 312     }
 313     else if (uri.HasPath())
 314         return false;
 315
 316     if (HasQuery())
 317     {
 318         if (m_query != uri.m_query)
 319             return false;
 320     }
 321     else if (uri.HasQuery())
 322         return false;
 323
 324     if (HasFragment())
 325     {
 326         if (m_fragment != uri.m_fragment)
 327             return false;
 328     }
 329     else if (uri.HasFragment())
 330         return false;
 331
 332     return true;
 333 }
 334
 335 // ---------------------------------------------------------------------------
 336 // IsReference
 337 //
 338 // if there is no authority or scheme, it is a reference
 339 // ---------------------------------------------------------------------------
 340
 341 bool wxURI::IsReference() const
 342 {   return !HasScheme() || !HasServer();  }
 343
 344 // ---------------------------------------------------------------------------
 345 // Parse
 346 //
 347 // Master URI parsing method.  Just calls the individual parsing methods
 348 //
 349 // URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
 350 // URI-reference = URI / relative-URITestCase
 351 // ---------------------------------------------------------------------------
 352
 353 const wxChar* wxURI::Parse(const wxChar* uri)
 354 {
 355     uri = ParseScheme(uri);
 356     uri = ParseAuthority(uri);
 357     uri = ParsePath(uri);
 358     uri = ParseQuery(uri);
 359     return ParseFragment(uri);
 360 }
 361
 362 // ---------------------------------------------------------------------------
 363 // ParseXXX
 364 //
 365 // Individual parsers for each URI component
 366 // ---------------------------------------------------------------------------
 367
 368 const wxChar* wxURI::ParseScheme(const wxChar* uri)
 369 {
 370     wxASSERT(uri != NULL);
 371
 372     //copy of the uri - used for figuring out
 373     //length of each component
 374     const wxChar* uricopy = uri;
 375
 376     //Does the uri have a scheme (first character alpha)?
 377     if (IsAlpha(*uri))
 378     {
 379         m_scheme += *uri++;
 380
 381         //scheme        = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
 382         while (IsAlpha(*uri) || IsDigit(*uri) ||
 383                *uri == wxT('+')   ||
 384                *uri == wxT('-')   ||
 385                *uri == wxT('.'))
 386         {
 387             m_scheme += *uri++;
 388         }
 389
 390         //valid scheme?
 391         if (*uri == wxT(':'))
 392         {
 393             //mark the scheme as valid
 394             m_fields |= wxURI_SCHEME;
 395
 396             //move reference point up to input buffer
 397             uricopy = ++uri;
 398         }
 399         else
 400             //relative uri with relative path reference
 401             m_scheme = wxT("");
 402     }
 403 //    else
 404         //relative uri with _possible_ relative path reference
 405
 406     return uricopy;
 407 }
 408
 409 const wxChar* wxURI::ParseAuthority(const wxChar* uri)
 410 {
 411     // authority     = [ userinfo "@" ] host [ ":" port ]
 412     if (*uri == wxT('/') && *(uri+1) == wxT('/'))
 413     {
 414         uri += 2;
 415
 416         uri = ParseUser(uri);
 417         uri = ParseServer(uri);
 418         return ParsePort(uri);
 419     }
 420
 421     return uri;
 422 }
 423
 424 const wxChar* wxURI::ParseUser(const wxChar* uri)
 425 {
 426     wxASSERT(uri != NULL);
 427
 428     //copy of the uri - used for figuring out
 429     //length of each component
 430     const wxChar* uricopy = uri;
 431
 432     // userinfo      = *( unreserved / pct-encoded / sub-delims / ":" )
 433     while(*uri && *uri != wxT('@') && *uri != wxT('/') && *uri != wxT('#') && *uri != wxT('?'))
 434     {
 435         if(IsUnreserved(*uri) || IsEscape(uri) ||
 436            IsSubDelim(*uri) || *uri == wxT(':'))
 437             m_user += *uri++;
 438         else
 439             Escape(m_user, *uri++);
 440     }
 441
 442     if(*uri == wxT('@'))
 443     {
 444         //valid userinfo
 445         m_fields |= wxURI_USER;
 446
 447         uricopy = ++uri;
 448     }
 449     else
 450         m_user = wxT("");
 451
 452     return uricopy;
 453 }
 454
 455 const wxChar* wxURI::ParseServer(const wxChar* uri)
 456 {
 457     wxASSERT(uri != NULL);
 458
 459     //copy of the uri - used for figuring out
 460     //length of each component
 461     const wxChar* uricopy = uri;
 462
 463     // host          = IP-literal / IPv4address / reg-name
 464     // IP-literal    = "[" ( IPv6address / IPvFuture  ) "]"
 465     if (*uri == wxT('['))
 466     {
 467         if (ParseIPv6address(++uri) && *uri == wxT(']'))
 468         {
 469             ++uri;
 470             m_hostType = wxURI_IPV6ADDRESS;
 471
 472             wxStringBufferLength theBuffer(m_server, uri - uricopy);
 473             wxMemcpy(theBuffer, uricopy, uri-uricopy);
 474             theBuffer.SetLength(uri-uricopy);
 475         }
 476         else
 477         {
 478             uri = uricopy;
 479
 480             if (ParseIPvFuture(++uri) && *uri == wxT(']'))
 481             {
 482                 ++uri;
 483                 m_hostType = wxURI_IPVFUTURE;
 484
 485                 wxStringBufferLength theBuffer(m_server, uri - uricopy);
 486                 wxMemcpy(theBuffer, uricopy, uri-uricopy);
 487                 theBuffer.SetLength(uri-uricopy);
 488             }
 489             else
 490                 uri = uricopy;
 491         }
 492     }
 493     else
 494     {
 495         if (ParseIPv4address(uri))
 496         {
 497             m_hostType = wxURI_IPV4ADDRESS;
 498
 499             wxStringBufferLength theBuffer(m_server, uri - uricopy);
 500             wxMemcpy(theBuffer, uricopy, uri-uricopy);
 501             theBuffer.SetLength(uri-uricopy);
 502         }
 503         else
 504             uri = uricopy;
 505     }
 506
 507     if(m_hostType == wxURI_REGNAME)
 508     {
 509         uri = uricopy;
 510         // reg-name      = *( unreserved / pct-encoded / sub-delims )
 511         while(*uri && *uri != wxT('/') && *uri != wxT(':') && *uri != wxT('#') && *uri != wxT('?'))
 512         {
 513             if(IsUnreserved(*uri) || IsEscape(uri) ||  IsSubDelim(*uri))
 514                 m_server += *uri++;
 515             else
 516                 Escape(m_server, *uri++);
 517         }
 518     }
 519
 520     //mark the server as valid
 521     m_fields |= wxURI_SERVER;
 522
 523     return uri;
 524 }
 525
 526
 527 const wxChar* wxURI::ParsePort(const wxChar* uri)
 528 {
 529     wxASSERT(uri != NULL);
 530
 531     // port          = *DIGIT
 532     if(*uri == wxT(':'))
 533     {
 534         ++uri;
 535         while(IsDigit(*uri))
 536         {
 537             m_port += *uri++;
 538         }
 539
 540         //mark the port as valid
 541         m_fields |= wxURI_PORT;
 542     }
 543
 544     return uri;
 545 }
 546
 547 const wxChar* wxURI::ParsePath(const wxChar* uri, bool bReference, bool bNormalize)
 548 {
 549     wxASSERT(uri != NULL);
 550
 551     //copy of the uri - used for figuring out
 552     //length of each component
 553     const wxChar* uricopy = uri;
 554
 555     /// hier-part     = "//" authority path-abempty
 556     ///               / path-absolute
 557     ///               / path-rootless
 558     ///               / path-empty
 559     ///
 560     /// relative-part = "//" authority path-abempty
 561     ///               / path-absolute
 562     ///               / path-noscheme
 563     ///               / path-empty
 564     ///
 565     /// path-abempty  = *( "/" segment )
 566     /// path-absolute = "/" [ segment-nz *( "/" segment ) ]
 567     /// path-noscheme = segment-nz-nc *( "/" segment )
 568     /// path-rootless = segment-nz *( "/" segment )
 569     /// path-empty    = 0<pchar>
 570     ///
 571     /// segment       = *pchar
 572     /// segment-nz    = 1*pchar
 573     /// segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" )
 574     ///               ; non-zero-length segment without any colon ":"
 575     ///
 576     /// pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
 577     if (*uri == wxT('/'))
 578     {
 579         m_path += *uri++;
 580
 581         while(*uri && *uri != wxT('#') && *uri != wxT('?'))
 582         {
 583             if( IsUnreserved(*uri) || IsSubDelim(*uri) || IsEscape(uri) ||
 584                 *uri == wxT(':') || *uri == wxT('@') || *uri == wxT('/'))
 585                 m_path += *uri++;
 586             else
 587                 Escape(m_path, *uri++);
 588         }
 589
 590         if (bNormalize)
 591         {
 592             wxStringBufferLength theBuffer(m_path, m_path.length() + 1);
 593             Normalize(theBuffer, true);
 594             theBuffer.SetLength(wxStrlen(theBuffer));
 595         }
 596         //mark the path as valid
 597         m_fields |= wxURI_PATH;
 598     }
 599     else if(*uri) //Relative path
 600     {
 601         if (bReference)
 602         {
 603             //no colon allowed
 604             while(*uri && *uri != wxT('#') && *uri != wxT('?'))
 605             {
 606                 if(IsUnreserved(*uri) || IsSubDelim(*uri) || IsEscape(uri) ||
 607                   *uri == wxT('@') || *uri == wxT('/'))
 608                     m_path += *uri++;
 609                 else
 610                     Escape(m_path, *uri++);
 611             }
 612         }
 613         else
 614         {
 615             while(*uri && *uri != wxT('#') && *uri != wxT('?'))
 616             {
 617                 if(IsUnreserved(*uri) || IsSubDelim(*uri) || IsEscape(uri) ||
 618                    *uri == wxT(':') || *uri == wxT('@') || *uri == wxT('/'))
 619                     m_path += *uri++;
 620                 else
 621                     Escape(m_path, *uri++);
 622             }
 623         }
 624
 625         if (uri != uricopy)
 626         {
 627             if (bNormalize)
 628             {
 629                 wxStringBufferLength theBuffer(m_path, m_path.length() + 1);
 630                 Normalize(theBuffer);
 631                 theBuffer.SetLength(wxStrlen(theBuffer));
 632             }
 633
 634             //mark the path as valid
 635             m_fields |= wxURI_PATH;
 636         }
 637     }
 638
 639     return uri;
 640 }
 641
 642
 643 const wxChar* wxURI::ParseQuery(const wxChar* uri)
 644 {
 645     wxASSERT(uri != NULL);
 646
 647     // query         = *( pchar / "/" / "?" )
 648     if (*uri == wxT('?'))
 649     {
 650         ++uri;
 651         while(*uri && *uri != wxT('#'))
 652         {
 653             if (IsUnreserved(*uri) || IsSubDelim(*uri) || IsEscape(uri) ||
 654                 *uri == wxT(':') || *uri == wxT('@') || *uri == wxT('/') || *uri == wxT('?'))
 655                   m_query += *uri++;
 656             else
 657                   Escape(m_query, *uri++);
 658         }
 659
 660         //mark the server as valid
 661         m_fields |= wxURI_QUERY;
 662     }
 663
 664     return uri;
 665 }
 666
 667
 668 const wxChar* wxURI::ParseFragment(const wxChar* uri)
 669 {
 670     wxASSERT(uri != NULL);
 671
 672     // fragment      = *( pchar / "/" / "?" )
 673     if (*uri == wxT('#'))
 674     {
 675         ++uri;
 676         while(*uri)
 677         {
 678             if (IsUnreserved(*uri) || IsSubDelim(*uri) || IsEscape(uri) ||
 679                 *uri == wxT(':') || *uri == wxT('@') || *uri == wxT('/') || *uri == wxT('?'))
 680                   m_fragment += *uri++;
 681             else
 682                   Escape(m_fragment, *uri++);
 683         }
 684
 685         //mark the server as valid
 686         m_fields |= wxURI_FRAGMENT;
 687     }
 688
 689     return uri;
 690 }
 691
 692 // ---------------------------------------------------------------------------
 693 // Resolve
 694 //
 695 // Builds missing components of this uri from a base uri
 696 //
 697 // A version of the algorithm outlined in the RFC is used here
 698 // (it is shown in comments)
 699 //
 700 // Note that an empty URI inherits all components
 701 // ---------------------------------------------------------------------------
 702
 703 void wxURI::Resolve(const wxURI& base, int flags)
 704 {
 705     wxASSERT_MSG(!base.IsReference(),
 706                 wxT("wxURI to inherit from must not be a reference!"));
 707
 708     // If we arn't being strict, enable the older (pre-RFC2396)
 709     // loophole that allows this uri to inherit other
 710     // properties from the base uri - even if the scheme
 711     // is defined
 712     if ( !(flags & wxURI_STRICT) &&
 713             HasScheme() && base.HasScheme() &&
 714                 m_scheme == base.m_scheme )
 715     {
 716         m_fields -= wxURI_SCHEME;
 717     }
 718
 719
 720     // Do nothing if this is an absolute wxURI
 721     //    if defined(R.scheme) then
 722     //       T.scheme    = R.scheme;
 723     //       T.authority = R.authority;
 724     //       T.path      = remove_dot_segments(R.path);
 725     //       T.query     = R.query;
 726     if (HasScheme())
 727     {
 728         return;
 729     }
 730
 731     //No sheme - inherit
 732     m_scheme = base.m_scheme;
 733     m_fields |= wxURI_SCHEME;
 734
 735     // All we need to do for relative URIs with an
 736     // authority component is just inherit the scheme
 737     //       if defined(R.authority) then
 738     //          T.authority = R.authority;
 739     //          T.path      = remove_dot_segments(R.path);
 740     //          T.query     = R.query;
 741     if (HasServer())
 742     {
 743         return;
 744     }
 745
 746     //No authority - inherit
 747     if (base.HasUser())
 748     {
 749         m_user = base.m_user;
 750         m_fields |= wxURI_USER;
 751     }
 752
 753     m_server = base.m_server;
 754     m_hostType = base.m_hostType;
 755     m_fields |= wxURI_SERVER;
 756
 757     if (base.HasPort())
 758     {
 759         m_port = base.m_port;
 760         m_fields |= wxURI_PORT;
 761     }
 762
 763
 764     // Simple path inheritance from base
 765     if (!HasPath())
 766     {
 767         //             T.path = Base.path;
 768         m_path = base.m_path;
 769         m_fields |= wxURI_PATH;
 770
 771
 772         //             if defined(R.query) then
 773         //                T.query = R.query;
 774         //             else
 775         //                T.query = Base.query;
 776         //             endif;
 777         if (!HasQuery())
 778         {
 779             m_query = base.m_query;
 780             m_fields |= wxURI_QUERY;
 781         }
 782     }
 783     else
 784     {
 785         //             if (R.path starts-with "/") then
 786         //                T.path = remove_dot_segments(R.path);
 787         //             else
 788         //                T.path = merge(Base.path, R.path);
 789         //                T.path = remove_dot_segments(T.path);
 790         //             endif;
 791         //             T.query = R.query;
 792         if (m_path[0u] != wxT('/'))
 793         {
 794             //Marge paths
 795             const wxChar* op = m_path.c_str();
 796             const wxChar* bp = base.m_path.c_str() + base.m_path.Length();
 797
 798             //not a ending directory?  move up
 799             if (base.m_path[0] && *(bp-1) != wxT('/'))
 800                 UpTree(base.m_path, bp);
 801
 802             //normalize directories
 803             while(*op == wxT('.') && *(op+1) == wxT('.') &&
 804                        (*(op+2) == '\0' || *(op+2) == wxT('/')) )
 805             {
 806                 UpTree(base.m_path, bp);
 807
 808                 if (*(op+2) == '\0')
 809                     op += 2;
 810                 else
 811                     op += 3;
 812             }
 813
 814             m_path = base.m_path.substr(0, bp - base.m_path.c_str()) +
 815                     m_path.Mid((op - m_path.c_str()), m_path.Length());
 816         }
 817     }
 818
 819     //T.fragment = R.fragment;
 820 }
 821
 822 // ---------------------------------------------------------------------------
 823 // UpTree
 824 //
 825 // Moves a URI path up a directory
 826 // ---------------------------------------------------------------------------
 827
 828 //static
 829 void wxURI::UpTree(const wxChar* uristart, const wxChar*& uri)
 830 {
 831     if (uri != uristart && *(uri-1) == wxT('/'))
 832     {
 833         uri -= 2;
 834     }
 835
 836     for(;uri != uristart; --uri)
 837     {
 838         if (*uri == wxT('/'))
 839         {
 840             ++uri;
 841             break;
 842         }
 843     }
 844
 845     //!!!TODO:HACK!!!//
 846     if (uri == uristart && *uri == wxT('/'))
 847         ++uri;
 848     //!!!//
 849 }
 850
 851 // ---------------------------------------------------------------------------
 852 // Normalize
 853 //
 854 // Normalizes directories in-place
 855 //
 856 // I.E. ./ and . are ignored
 857 //
 858 // ../ and .. are removed if a directory is before it, along
 859 // with that directory (leading .. and ../ are kept)
 860 // ---------------------------------------------------------------------------
 861
 862 //static
 863 void wxURI::Normalize(wxChar* s, bool bIgnoreLeads)
 864 {
 865     wxChar* cp = s;
 866     wxChar* bp = s;
 867
 868     if(s[0] == wxT('/'))
 869         ++bp;
 870
 871     while(*cp)
 872     {
 873         if (*cp == wxT('.') && (*(cp+1) == wxT('/') || *(cp+1) == '\0')
 874             && (bp == cp || *(cp-1) == wxT('/')))
 875         {
 876             //. _or_ ./  - ignore
 877             if (*(cp+1) == '\0')
 878                 cp += 1;
 879             else
 880                 cp += 2;
 881         }
 882         else if (*cp == wxT('.') && *(cp+1) == wxT('.') &&
 883                 (*(cp+2) == wxT('/') || *(cp+2) == '\0')
 884                 && (bp == cp || *(cp-1) == wxT('/')))
 885         {
 886             //.. _or_ ../ - go up the tree
 887             if (s != bp)
 888             {
 889                 UpTree((const wxChar*)bp, (const wxChar*&)s);
 890
 891                 if (*(cp+2) == '\0')
 892                     cp += 2;
 893                 else
 894                     cp += 3;
 895             }
 896             else if (!bIgnoreLeads)
 897
 898             {
 899                 *bp++ = *cp++;
 900                 *bp++ = *cp++;
 901                 if (*cp)
 902                     *bp++ = *cp++;
 903
 904                 s = bp;
 905             }
 906             else
 907             {
 908                 if (*(cp+2) == '\0')
 909                     cp += 2;
 910                 else
 911                     cp += 3;
 912             }
 913         }
 914         else
 915             *s++ = *cp++;
 916     }
 917
 918     *s = '\0';
 919 }
 920
 921 // ---------------------------------------------------------------------------
 922 // ParseH16
 923 //
 924 // Parses 1 to 4 hex values.  Returns true if the first character of the input
 925 // string is a valid hex character.  It is the caller's responsability to move
 926 // the input string back to its original position on failure.
 927 // ---------------------------------------------------------------------------
 928
 929 bool wxURI::ParseH16(const wxChar*& uri)
 930 {
 931     // h16           = 1*4HEXDIG
 932     if(!IsHex(*++uri))
 933         return false;
 934
 935     if(IsHex(*++uri) && IsHex(*++uri) && IsHex(*++uri))
 936         ++uri;
 937
 938     return true;
 939 }
 940
 941 // ---------------------------------------------------------------------------
 942 // ParseIPXXX
 943 //
 944 // Parses a certain version of an IP address and moves the input string past
 945 // it.  Returns true if the input  string contains the proper version of an ip
 946 // address.  It is the caller's responsability to move the input string back
 947 // to its original position on failure.
 948 // ---------------------------------------------------------------------------
 949
 950 bool wxURI::ParseIPv4address(const wxChar*& uri)
 951 {
 952     //IPv4address   = dec-octet "." dec-octet "." dec-octet "." dec-octet
 953     //
 954     //dec-octet     =      DIGIT                    ; 0-9
 955     //                / %x31-39 DIGIT               ; 10-99
 956     //                / "1" 2DIGIT                  ; 100-199
 957     //                / "2" %x30-34 DIGIT           ; 200-249
 958     //                / "25" %x30-35                ; 250-255
 959     size_t iIPv4 = 0;
 960     if (IsDigit(*uri))
 961     {
 962         ++iIPv4;
 963
 964
 965         //each ip part must be between 0-255 (dupe of version in for loop)
 966         if( IsDigit(*++uri) && IsDigit(*++uri) &&
 967            //100 or less  (note !)
 968            !( (*(uri-2) < wxT('2')) ||
 969            //240 or less
 970              (*(uri-2) == wxT('2') &&
 971                (*(uri-1) < wxT('5') || (*(uri-1) == wxT('5') && *uri <= wxT('5')))
 972              )
 973             )
 974           )
 975         {
 976             return false;
 977         }
 978
 979         if(IsDigit(*uri))++uri;
 980
 981         //compilers should unroll this loop
 982         for(; iIPv4 < 4; ++iIPv4)
 983         {
 984             if (*uri != wxT('.') || !IsDigit(*++uri))
 985                 break;
 986
 987             //each ip part must be between 0-255
 988             if( IsDigit(*++uri) && IsDigit(*++uri) &&
 989                //100 or less  (note !)
 990                !( (*(uri-2) < wxT('2')) ||
 991                //240 or less
 992                  (*(uri-2) == wxT('2') &&
 993                    (*(uri-1) < wxT('5') || (*(uri-1) == wxT('5') && *uri <= wxT('5')))
 994                  )
 995                 )
 996               )
 997             {
 998                 return false;
 999             }
1000             if(IsDigit(*uri))++uri;
1001         }
1002     }
1003     return iIPv4 == 4;
1004 }
1005
1006 bool wxURI::ParseIPv6address(const wxChar*& uri)
1007 {
1008     // IPv6address   =                            6( h16 ":" ) ls32
1009     //               /                       "::" 5( h16 ":" ) ls32
1010     //               / [               h16 ] "::" 4( h16 ":" ) ls32
1011     //               / [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
1012     //               / [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
1013     //               / [ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
1014     //               / [ *4( h16 ":" ) h16 ] "::"              ls32
1015     //               / [ *5( h16 ":" ) h16 ] "::"              h16
1016     //               / [ *6( h16 ":" ) h16 ] "::"
1017
1018     size_t numPrefix = 0,
1019               maxPostfix;
1020
1021     bool bEndHex = false;
1022
1023     for( ; numPrefix < 6; ++numPrefix)
1024     {
1025         if(!ParseH16(uri))
1026         {
1027             --uri;
1028             bEndHex = true;
1029             break;
1030         }
1031
1032         if(*uri != wxT(':'))
1033         {
1034             break;
1035         }
1036     }
1037
1038     if(!bEndHex && !ParseH16(uri))
1039     {
1040         --uri;
1041
1042         if (numPrefix)
1043             return false;
1044
1045         if (*uri == wxT(':'))
1046         {
1047             if (*++uri != wxT(':'))
1048                 return false;
1049
1050             maxPostfix = 5;
1051         }
1052         else
1053             maxPostfix = 6;
1054     }
1055     else
1056     {
1057         if (*uri != wxT(':') || *(uri+1) != wxT(':'))
1058         {
1059             if (numPrefix != 6)
1060                 return false;
1061
1062             while (*--uri != wxT(':')) {}
1063             ++uri;
1064
1065             const wxChar* uristart = uri;
1066             //parse ls32
1067             // ls32          = ( h16 ":" h16 ) / IPv4address
1068             if (ParseH16(uri) && *uri == wxT(':') && ParseH16(uri))
1069                 return true;
1070
1071             uri = uristart;
1072
1073             if (ParseIPv4address(uri))
1074                 return true;
1075             else
1076                 return false;
1077         }
1078         else
1079         {
1080             uri += 2;
1081
1082             if (numPrefix > 3)
1083                 maxPostfix = 0;
1084             else
1085                 maxPostfix = 4 - numPrefix;
1086         }
1087     }
1088
1089     bool bAllowAltEnding = maxPostfix == 0;
1090
1091     for(; maxPostfix != 0; --maxPostfix)
1092     {
1093         if(!ParseH16(uri) || *uri != wxT(':'))
1094             return false;
1095     }
1096
1097     if(numPrefix <= 4)
1098     {
1099         const wxChar* uristart = uri;
1100         //parse ls32
1101         // ls32          = ( h16 ":" h16 ) / IPv4address
1102         if (ParseH16(uri) && *uri == wxT(':') && ParseH16(uri))
1103             return true;
1104
1105         uri = uristart;
1106
1107         if (ParseIPv4address(uri))
1108             return true;
1109
1110         uri = uristart;
1111
1112         if (!bAllowAltEnding)
1113             return false;
1114     }
1115
1116     if(numPrefix <= 5 && ParseH16(uri))
1117         return true;
1118
1119     return true;
1120 }
1121
1122 bool wxURI::ParseIPvFuture(const wxChar*& uri)
1123 {
1124     // IPvFuture     = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )
1125     if (*++uri != wxT('v') || !IsHex(*++uri))
1126         return false;
1127
1128     while (IsHex(*++uri)) {}
1129
1130     if (*uri != wxT('.') || !(IsUnreserved(*++uri) || IsSubDelim(*uri) || *uri == wxT(':')))
1131         return false;
1132
1133     while(IsUnreserved(*++uri) || IsSubDelim(*uri) || *uri == wxT(':')) {}
1134
1135     return true;
1136 }
1137
1138
1139 // ---------------------------------------------------------------------------
1140 // CharToHex
1141 //
1142 // Converts a character into a numeric hexidecimal value, or 0 if the
1143 // passed in character is not a valid hex character
1144 // ---------------------------------------------------------------------------
1145
1146 //static
1147 wxInt32 wxURI::CharToHex(const wxChar& c)
1148 {
1149         if ((c >= wxT('A')) && (c <= wxT('Z'))) return c - wxT('A') + 0x0A;
1150         if ((c >= wxT('a')) && (c <= wxT('z'))) return c - wxT('a') + 0x0a;
1151         if ((c >= wxT('0')) && (c <= wxT('9'))) return c - wxT('0') + 0x00;
1152
1153         return 0;
1154 }
1155
1156 // ---------------------------------------------------------------------------
1157 // IsXXX
1158 //
1159 // Returns true if the passed in character meets the criteria of the method
1160 // ---------------------------------------------------------------------------
1161
1162 //! unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
1163 bool wxURI::IsUnreserved (const wxChar& c)
1164 {   return IsAlpha(c) || IsDigit(c) ||
1165            c == wxT('-') ||
1166            c == wxT('.') ||
1167            c == wxT('_') ||
1168            c == wxT('~') //tilde
1169            ;
1170 }
1171
1172 bool wxURI::IsReserved (const wxChar& c)
1173 {
1174     return IsGenDelim(c) || IsSubDelim(c);
1175 }
1176
1177 //! gen-delims    = ":" / "/" / "?" / "#" / "[" / "]" / "@"
1178 bool wxURI::IsGenDelim (const wxChar& c)
1179 {
1180     return c == wxT(':') ||
1181            c == wxT('/') ||
1182            c == wxT('?') ||
1183            c == wxT('#') ||
1184            c == wxT('[') ||
1185            c == wxT(']') ||
1186            c == wxT('@');
1187 }
1188
1189 //! sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
1190 //!               / "*" / "+" / "," / ";" / "="
1191 bool wxURI::IsSubDelim (const wxChar& c)
1192 {
1193     return c == wxT('!') ||
1194            c == wxT('$') ||
1195            c == wxT('&') ||
1196            c == wxT('\'') ||
1197            c == wxT('(') ||
1198            c == wxT(')') ||
1199            c == wxT('*') ||
1200            c == wxT('+') ||
1201            c == wxT(',') ||
1202            c == wxT(';') ||
1203            c == wxT('=')
1204            ;
1205 }
1206
1207 bool wxURI::IsHex(const wxChar& c)
1208 {   return IsDigit(c) || (c >= wxT('a') && c <= wxT('f')) || (c >= wxT('A') && c <= wxT('F')); }
1209
1210 bool wxURI::IsAlpha(const wxChar& c)
1211 {   return (c >= wxT('a') && c <= wxT('z')) || (c >= wxT('A') && c <= wxT('Z'));  }
1212
1213 bool wxURI::IsDigit(const wxChar& c)
1214 {   return c >= wxT('0') && c <= wxT('9');        }
1215
1216
1217 // ---------------------------------------------------------------------------
1218 //
1219 //                        wxURL Compatability
1220 //
1221 // ---------------------------------------------------------------------------
1222
1223 #if wxUSE_URL
1224
1225 #if WXWIN_COMPATIBILITY_2_4
1226
1227 #include "wx/url.h"
1228
1229 wxString wxURL::ConvertToValidURI(const wxString& uri, const wxChar* WXUNUSED(delims))
1230 {
1231     return wxURI(uri).BuildURI();
1232 }
1233
1234 wxString wxURL::ConvertFromURI(const wxString& uri)
1235 {
1236     return wxURI::Unescape(uri);
1237 }
1238
1239 #endif //WXWIN_COMPATIBILITY_2_4
1240
1241 #endif //wxUSE_URL
1242
1243 //end of uri.cpp
1244
1245
1246