85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*
|
|
* Regular expression structs, constants, and bytecode defines.
|
|
*/
|
|
|
|
#if !defined(DUK_REGEXP_H_INCLUDED)
|
|
#define DUK_REGEXP_H_INCLUDED
|
|
|
|
/* maximum bytecode copies for {n,m} quantifiers */
|
|
#define DUK_RE_MAX_ATOM_COPIES 1000
|
|
|
|
/* regexp compilation limits */
|
|
#define DUK_RE_COMPILE_TOKEN_LIMIT 100000000L /* 1e8 */
|
|
|
|
/* regexp execution limits */
|
|
#define DUK_RE_EXECUTE_STEPS_LIMIT 1000000000L /* 1e9 */
|
|
|
|
/* regexp opcodes */
|
|
#define DUK_REOP_MATCH 1
|
|
#define DUK_REOP_CHAR 2
|
|
#define DUK_REOP_PERIOD 3
|
|
#define DUK_REOP_RANGES 4
|
|
#define DUK_REOP_INVRANGES 5
|
|
#define DUK_REOP_JUMP 6
|
|
#define DUK_REOP_SPLIT1 7
|
|
#define DUK_REOP_SPLIT2 8
|
|
#define DUK_REOP_SQMINIMAL 9
|
|
#define DUK_REOP_SQGREEDY 10
|
|
#define DUK_REOP_SAVE 11
|
|
#define DUK_REOP_WIPERANGE 12
|
|
#define DUK_REOP_LOOKPOS 13
|
|
#define DUK_REOP_LOOKNEG 14
|
|
#define DUK_REOP_BACKREFERENCE 15
|
|
#define DUK_REOP_ASSERT_START 16
|
|
#define DUK_REOP_ASSERT_END 17
|
|
#define DUK_REOP_ASSERT_WORD_BOUNDARY 18
|
|
#define DUK_REOP_ASSERT_NOT_WORD_BOUNDARY 19
|
|
|
|
/* flags */
|
|
#define DUK_RE_FLAG_GLOBAL (1U << 0)
|
|
#define DUK_RE_FLAG_IGNORE_CASE (1U << 1)
|
|
#define DUK_RE_FLAG_MULTILINE (1U << 2)
|
|
|
|
struct duk_re_matcher_ctx {
|
|
duk_hthread *thr;
|
|
|
|
duk_uint32_t re_flags;
|
|
const duk_uint8_t *input;
|
|
const duk_uint8_t *input_end;
|
|
const duk_uint8_t *bytecode;
|
|
const duk_uint8_t *bytecode_end;
|
|
const duk_uint8_t **saved; /* allocated from valstack (fixed buffer) */
|
|
duk_uint32_t nsaved;
|
|
duk_uint32_t recursion_depth;
|
|
duk_uint32_t recursion_limit;
|
|
duk_uint32_t steps_count;
|
|
duk_uint32_t steps_limit;
|
|
};
|
|
|
|
struct duk_re_compiler_ctx {
|
|
duk_hthread *thr;
|
|
|
|
duk_uint32_t re_flags;
|
|
duk_lexer_ctx lex;
|
|
duk_re_token curr_token;
|
|
duk_bufwriter_ctx bw;
|
|
duk_uint32_t captures; /* highest capture number emitted so far (used as: ++captures) */
|
|
duk_uint32_t highest_backref;
|
|
duk_uint32_t recursion_depth;
|
|
duk_uint32_t recursion_limit;
|
|
duk_uint32_t nranges; /* internal temporary value, used for char classes */
|
|
};
|
|
|
|
/*
|
|
* Prototypes
|
|
*/
|
|
|
|
#if defined(DUK_USE_REGEXP_SUPPORT)
|
|
DUK_INTERNAL_DECL void duk_regexp_compile(duk_hthread *thr);
|
|
DUK_INTERNAL_DECL void duk_regexp_create_instance(duk_hthread *thr);
|
|
DUK_INTERNAL_DECL void duk_regexp_match(duk_hthread *thr);
|
|
DUK_INTERNAL_DECL void duk_regexp_match_force_global(duk_hthread *thr); /* hacky helper for String.prototype.split() */
|
|
#endif
|
|
|
|
#endif /* DUK_REGEXP_H_INCLUDED */
|