forked from aniani/gmnisrv
7e8a953794
All this does is parse the regexes out of the config file. I've vendored libregexp from Bellard's quickjs project, because it's reasonably small and self-contained, and POSIX regexes don't support captures. We're eventually going to want captures for URL rewrites, so this'll do for now.
74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
/*
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* Regular Expression Engine
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*
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* Copyright (c) 2017-2018 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef LIBREGEXP_H
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#define LIBREGEXP_H
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#include <stddef.h>
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#include <stdbool.h>
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#define LRE_FLAG_GLOBAL (1 << 0)
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#define LRE_FLAG_IGNORECASE (1 << 1)
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#define LRE_FLAG_MULTILINE (1 << 2)
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#define LRE_FLAG_DOTALL (1 << 3)
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#define LRE_FLAG_UTF16 (1 << 4)
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#define LRE_FLAG_STICKY (1 << 5)
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#define LRE_FLAG_NAMED_GROUPS (1 << 7) /* named groups are present in the regexp */
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uint8_t *lre_compile(int *plen, char *error_msg, int error_msg_size,
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const char *buf, size_t buf_len, int re_flags, void *opaque);
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int lre_get_capture_count(const uint8_t *bc_buf);
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int lre_get_flags(const uint8_t *bc_buf);
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const char *lre_get_groupnames(const uint8_t *bc_buf);
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int lre_exec(uint8_t **capture,
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const uint8_t *bc_buf, const uint8_t *cbuf, int cindex, int clen,
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int cbuf_type, void *opaque);
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int lre_parse_escape(const uint8_t **pp, int allow_utf16);
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bool lre_is_space(int c);
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/* JS identifier test */
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extern uint32_t const lre_id_start_table_ascii[4];
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extern uint32_t const lre_id_continue_table_ascii[4];
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static inline int lre_js_is_ident_first(int c)
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{
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if ((uint32_t)c < 128) {
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return (lre_id_start_table_ascii[c >> 5] >> (c & 31)) & 1;
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} else {
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return !lre_is_space(c);
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}
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}
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static inline int lre_js_is_ident_next(int c)
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{
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if ((uint32_t)c < 128) {
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return (lre_id_continue_table_ascii[c >> 5] >> (c & 31)) & 1;
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} else {
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/* ZWNJ and ZWJ are accepted in identifiers */
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return !lre_is_space(c) || c == 0x200C || c == 0x200D;
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}
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}
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#endif /* LIBREGEXP_H */
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