aboutsummaryrefslogtreecommitdiffstats
path: root/library/cpp/regex/pcre/regexp.h
blob: c74d20b3ad860c0e6fa6efc8658990a0b8b07f16 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
#pragma once

#include <sys/types.h>
 
#include <util/system/defaults.h>
#include <util/generic/string.h>
#include <util/generic/yexception.h>
 
#include <contrib/libs/pcre/pcre.h> 
#include <contrib/libs/pcre/pcreposix.h> 
 
//THIS CODE LOOKS LIKE A TRASH, BUT WORKS.
 
#define NMATCHES 100
#define REGEXP_GLOBAL 0x0080 // use this if you want to find all occurences

class TRegExBaseImpl;

class TRegExBase {
protected:
    TSimpleIntrusivePtr<TRegExBaseImpl> Impl;
 
public:
    TRegExBase(const char* regExpr = nullptr, int cflags = REG_EXTENDED);
    TRegExBase(const TString& regExpr, int cflags = REG_EXTENDED);

    virtual ~TRegExBase();

    int Exec(const char* str, regmatch_t pmatch[], int eflags, int nmatches = NMATCHES) const; 
    void Compile(const TString& regExpr, int cflags = REG_EXTENDED);
    bool IsCompiled() const;
    int GetCompileOptions() const;
    TString GetRegExpr() const;
};

class TRegExMatch: public TRegExBase { 
public:
    TRegExMatch(const char* regExpr = nullptr, int cflags = REG_NOSUB | REG_EXTENDED);
    TRegExMatch(const TString& regExpr, int cflags = REG_NOSUB | REG_EXTENDED);

    bool Match(const char* str) const; 
};

struct TBackReferences { 
    int Beg;
    int End;
    int Refer;
};

class TRegExSubst: public TRegExBase { 
private:
    const char* Replacement;
    regmatch_t PMatch[NMATCHES]; 

    TBackReferences Brfs[NMATCHES];
    int BrfsCount;

public:
    TRegExSubst(const char* regExpr = nullptr, int cflags = REG_EXTENDED);

    TString Replace(const char* str, int eflags = 0);
    int ParseReplacement(const char* replacement); 
};