regexp.h

00001 // -*- c-basic-offset: 2 -*-
00002 /*
00003  *  This file is part of the KDE libraries
00004  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
00005  *
00006  *  This library is free software; you can redistribute it and/or
00007  *  modify it under the terms of the GNU Lesser General Public
00008  *  License as published by the Free Software Foundation; either
00009  *  version 2 of the License, or (at your option) any later version.
00010  *
00011  *  This library is distributed in the hope that it will be useful,
00012  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  *  Lesser General Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU Lesser General Public
00017  *  License along with this library; if not, write to the Free Software
00018  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00019  *
00020  */
00021 
00022 #ifndef _KJS_REGEXP_H_
00023 #define _KJS_REGEXP_H_
00024 
00025 #include <sys/types.h>
00026 
00027 #include "config.h"
00028 
00029 #ifdef HAVE_PCREPOSIX
00030 #include <pcre.h>
00031 #else  // POSIX regex - not so good...
00032 extern "C" { // bug with some libc5 distributions
00033 #include <regex.h>
00034 }
00035 #endif //HAVE_PCREPOSIX
00036 
00037 #include "ustring.h"
00038 
00039 namespace KJS {
00040 
00041   class RegExp {
00042   public:
00043     enum { None = 0, Global = 1, IgnoreCase = 2, Multiline = 4 };
00044     RegExp(const UString &p, int f = None);
00045     ~RegExp();
00046     int flags() const { return flgs; }
00047     UString pattern() const { return pat; }
00048     bool isValid() const { return valid; }
00049     UString match(const UString &s, int i, int *pos = 0, int **ovector = 0);
00050     // test is unused. The JS spec says that RegExp.test should use
00051     // RegExp.exec, so it has to store $1 etc.
00052     // bool test(const UString &s, int i = -1);
00053     unsigned int subPatterns() const { return nrSubPatterns; }
00054     
00055     //These methods should be called around the match of the same string..
00056     void prepareMatch(const UString &s);
00057     void doneMatch();
00058   private:
00059     const UString pat;
00060     int flgs : 8;
00061     bool m_notEmpty;
00062     bool valid;
00063     
00064     // Cached encoding info...
00065     char* buffer;
00066     int*  originalPos;
00067     int   bufferSize;
00068 
00069     void prepareUtf8  (const UString& s);
00070     void prepareASCII (const UString& s);
00071 #ifndef NDEBUG
00072     UString originalS; // the original string, used for sanity-checking
00073 #endif
00074 
00075 #ifndef HAVE_PCREPOSIX
00076     regex_t preg;
00077 #else
00078     pcre *pcregex;
00079     
00080     enum UTF8SupportState {
00081       Unknown,
00082       Supported,
00083       Unsupported
00084     };
00085     
00086 #ifdef PCRE_CONFIG_UTF8
00087     static UTF8SupportState utf8Support;
00088 #endif
00089 #endif
00090     unsigned int nrSubPatterns;
00091 
00092     RegExp();
00093   };
00094 
00095 } // namespace
00096 
00097 #endif
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