1// -*- c-basic-offset: 2 -*-
2/*
3 * This file is part of the KDE libraries
4 * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 */
21
22#ifndef _KJS_REGEXP_H_
23#define _KJS_REGEXP_H_
24
25#include <sys/types.h>
26
27#include "global.h"
28
29#include <config-kjs.h>
30
31#ifdef HAVE_PCREPOSIX
32#include <pcre.h>
33#else // POSIX regex - not so good...
34extern "C" { // bug with some libc5 distributions
35#include <regex.h>
36}
37#endif //HAVE_PCREPOSIX
38
39#if defined _WIN32 || defined _WIN64
40#undef HAVE_SYS_TIME_H
41#endif
42#if HAVE(SYS_TIME_H)
43#include <sys/resource.h>
44#endif
45
46#include "ustring.h"
47
48namespace KJS {
49
50
51 // Represents a strign re-encoded to whatever PCRE can handle
52 class RegExpStringContext {
53 public:
54 explicit RegExpStringContext(const UString& pattern);
55 ~RegExpStringContext();
56
57 char* buffer() const { return _buffer; }
58 int bufferSize() const { return _bufferSize; }
59 int originalPos(int c) const { return _originalPos[c]; }
60
61 private:
62 // Cached encoding info...
63 char* _buffer;
64 int* _originalPos;
65 int _bufferSize;
66
67 void prepareUtf8 (const UString& s);
68 void prepareASCII (const UString& s);
69#ifndef NDEBUG
70 public:
71 UString _originalS; // the original string, used for sanity-checking
72#endif
73 };
74
75 class RegExp {
76 public:
77 enum { None = 0, Global = 1, IgnoreCase = 2, Multiline = 4 };
78
79 explicit RegExp(const UString &pattern, char flags = None);
80 ~RegExp();
81
82 char flags() const { return _flags; }
83 bool isValid() const { return _valid; }
84
85 UString match(const RegExpStringContext& c, const UString& s, bool *error, int i, int *pos = 0, int **ovector = 0);
86 unsigned subPatterns() const { return _numSubPatterns; }
87 UString pattern() const { return _pat; }
88
89 static bool tryGrowingMaxStackSize;
90 static bool didIncreaseMaxStackSize;
91#if HAVE(SYS_TIME_H)
92 static rlim_t availableStackSize;
93#else
94 static int availableStackSize;
95#endif
96 private:
97#ifdef HAVE_PCREPOSIX
98 pcre *_regex;
99#else
100 regex_t _regex;
101#endif
102 UString _pat;
103 char _flags;
104 bool _valid;
105 unsigned _numSubPatterns;
106
107 RegExp(const RegExp &);
108 RegExp &operator=(const RegExp &);
109
110 public:
111 enum UTF8SupportState {
112 Unknown,
113 Supported,
114 Unsupported
115 };
116
117 static UTF8SupportState utf8Support;
118 };
119
120} // namespace
121
122#endif
123