blob: d64156c002224ec3fa901f1fdf15fef8c3690ab4 (
plain)
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
|
#ifndef PRISM_INTERNAL_STRPBRK_H
#define PRISM_INTERNAL_STRPBRK_H
#include "prism/parser.h"
/* The maximum number of bytes in a strpbrk charset. */
#define PM_STRPBRK_CACHE_SIZE 16
#include <stddef.h>
#include <stdint.h>
/*
* Here we have rolled our own version of strpbrk. The standard library strpbrk
* has undefined behavior when the source string is not null-terminated. We want
* to support strings that are not null-terminated because pm_parse does not
* have the contract that the string is null-terminated. (This is desirable
* because it means the extension can call pm_parse with the result of a call to
* mmap).
*
* The standard library strpbrk also does not support passing a maximum length
* to search. We want to support this for the reason mentioned above, but we
* also don't want it to stop on null bytes. Ruby actually allows null bytes
* within strings, comments, regular expressions, etc. So we need to be able to
* skip past them.
*
* Finally, we want to support encodings wherein the charset could contain
* characters that are trailing bytes of multi-byte characters. For example, in
* Shift-JIS, the backslash character can be a trailing byte. In that case we
* need to take a slower path and iterate one multi-byte character at a time.
*/
const uint8_t * pm_strpbrk(pm_parser_t *parser, const uint8_t *source, const uint8_t *charset, ptrdiff_t length, bool validate);
#endif
|
