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