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// Copyright 2007-2009 Russ Cox. All Rights Reserved.
// Copyright 2014 Paul Sokolovsky.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#ifndef _RE1_5_REGEXP__H
#define _RE1_5_REGEXP__H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#define nil ((void*)0)
#define nelem(x) (sizeof(x)/sizeof((x)[0]))
typedef struct Regexp Regexp;
typedef struct Prog Prog;
typedef struct ByteProg ByteProg;
typedef struct Inst Inst;
typedef struct Subject Subject;
struct Regexp
{
int type;
int n;
int ch;
Regexp *left;
Regexp *right;
};
enum /* Regexp.type */
{
Alt = 1,
Cat,
Lit,
Dot,
Paren,
Quest,
Star,
Plus,
};
Regexp *parse(char*);
Regexp *reg(int type, Regexp *left, Regexp *right);
void printre(Regexp*);
#ifndef re1_5_fatal
void re1_5_fatal(char*);
#endif
#ifndef re1_5_stack_chk
#define re1_5_stack_chk()
#endif
void *mal(int);
struct Prog
{
Inst *start;
int len;
};
struct ByteProg
{
int bytelen;
int len;
int sub;
char insts[0];
};
struct Inst
{
int opcode;
int c;
int n;
Inst *x;
Inst *y;
int gen; // global state, oooh!
};
enum /* Inst.opcode */
{
// Instructions which consume input bytes (and thus fail if none left)
CONSUMERS = 1,
Char = CONSUMERS,
Any,
Class,
ClassNot,
NamedClass,
ASSERTS = 0x50,
Bol = ASSERTS,
Eol,
// Instructions which take relative offset as arg
JUMPS = 0x60,
Jmp = JUMPS,
Split,
RSplit,
// Other (special) instructions
Save = 0x7e,
Match = 0x7f,
};
#define inst_is_consumer(inst) ((inst) < ASSERTS)
#define inst_is_jump(inst) ((inst) & 0x70 == JUMPS)
Prog *compile(Regexp*);
void printprog(Prog*);
extern int gen;
enum {
MAXSUB = 20
};
typedef struct Sub Sub;
struct Sub
{
int ref;
int nsub;
const char *sub[MAXSUB];
};
Sub *newsub(int n);
Sub *incref(Sub*);
Sub *copy(Sub*);
Sub *update(Sub*, int, const char*);
void decref(Sub*);
struct Subject {
const char *begin_line;
const char *begin;
const char *end;
};
#define NON_ANCHORED_PREFIX 5
#define HANDLE_ANCHORED(bytecode, is_anchored) ((is_anchored) ? (bytecode) + NON_ANCHORED_PREFIX : (bytecode))
#define RE15_CLASS_NAMED_CLASS_INDICATOR 0
int re1_5_backtrack(ByteProg*, Subject*, const char**, int, int);
int re1_5_pikevm(ByteProg*, Subject*, const char**, int, int);
int re1_5_recursiveloopprog(ByteProg*, Subject*, const char**, int, int);
int re1_5_recursiveprog(ByteProg*, Subject*, const char**, int, int);
int re1_5_thompsonvm(ByteProg*, Subject*, const char**, int, int);
int re1_5_sizecode(const char *re);
int re1_5_compilecode(ByteProg *prog, const char *re);
void re1_5_dumpcode(ByteProg *prog);
void cleanmarks(ByteProg *prog);
int _re1_5_classmatch(const char *pc, const char *sp);
int _re1_5_namedclassmatch(const char *pc, const char *sp);
#endif /*_RE1_5_REGEXP__H*/
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