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8fcefb30 | 1 | /* |
b8ae064d | 2 | * Copyright (C) 1996-2023 The Squid Software Foundation and contributors |
8fcefb30 AJ |
3 | * |
4 | * Squid software is distributed under GPLv2+ license and includes | |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
7 | */ | |
8 | ||
9 | #ifndef SQUID_SRC_BASE_REGEXPATTERN_H | |
10 | #define SQUID_SRC_BASE_REGEXPATTERN_H | |
11 | ||
12 | #include "mem/forward.h" | |
0fa036e3 | 13 | #include "sbuf/SBuf.h" |
8fcefb30 | 14 | |
2e0942f9 | 15 | #if HAVE_REGEX_H |
16 | #include <regex.h> | |
17 | #endif | |
18 | ||
8fcefb30 AJ |
19 | /** |
20 | * A regular expression, | |
21 | * plain text and compiled representations | |
22 | */ | |
23 | class RegexPattern | |
24 | { | |
25 | MEMPROXY_CLASS(RegexPattern); | |
26 | ||
27 | public: | |
28 | RegexPattern() = delete; | |
0fa036e3 | 29 | RegexPattern(const SBuf &aPattern, int aFlags); |
c2afddd8 AJ |
30 | ~RegexPattern(); |
31 | ||
0fa036e3 | 32 | RegexPattern(RegexPattern &&) = delete; // no copying of any kind |
c2afddd8 | 33 | |
0fa036e3 AR |
34 | /// whether the regex differentiates letter case |
35 | bool caseSensitive() const { return !(flags & REG_ICASE); } | |
36 | ||
37 | /// whether this is an "any single character" regex (".") | |
38 | bool isDot() const { return pattern.length() == 1 && pattern[0] == '.'; } | |
b9a9207b | 39 | |
aee3523a | 40 | bool match(const char *str) const {return regexec(®ex,str,0,nullptr,0)==0;} |
95b8eae2 | 41 | |
0fa036e3 AR |
42 | /// Attempts to reproduce this regex (context-sensitive) configuration. |
43 | /// If the previous regex is nil, may not report default flags. | |
44 | /// Otherwise, may not report same-as-previous flags (and prepends a space). | |
45 | void print(std::ostream &os, const RegexPattern *previous = nullptr) const; | |
95b8eae2 AJ |
46 | |
47 | private: | |
0fa036e3 AR |
48 | /// a regular expression in the text form, suitable for regcomp(3) |
49 | SBuf pattern; | |
50 | ||
51 | /// bitmask of REG_* flags for regcomp(3) | |
52 | const int flags; | |
53 | ||
54 | /// a "compiled pattern buffer" filled by regcomp(3) for regexec(3) | |
55 | regex_t regex; | |
8fcefb30 AJ |
56 | }; |
57 | ||
0fa036e3 AR |
58 | inline std::ostream & |
59 | operator <<(std::ostream &os, const RegexPattern &rp) | |
60 | { | |
61 | rp.print(os); | |
62 | return os; | |
63 | } | |
64 | ||
8fcefb30 AJ |
65 | #endif /* SQUID_SRC_BASE_REGEXPATTERN_H */ |
66 |