mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 22:20:45 +00:00
101 lines
3 KiB
C
101 lines
3 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2004-2005 Sergey Lyubka <valenok@gmail.com>
|
||
|
|
* All rights reserved
|
||
|
|
*
|
||
|
|
* "THE BEER-WARE LICENSE" (Revision 42):
|
||
|
|
* Sergey Lyubka wrote this file. As long as you retain this notice you
|
||
|
|
* can do whatever you want with this stuff. If we meet some day, and you think
|
||
|
|
* this stuff is worth it, you can buy me a beer in return.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Downloaded Sat Nov 5 17:42:08 CET 2011 at
|
||
|
|
* http://slre.sourceforge.net/1.0/slre.h
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This is a regular expression library that implements a subset of Perl RE.
|
||
|
|
* Please refer to http://slre.sourceforge.net for detailed description.
|
||
|
|
*
|
||
|
|
* Usage example (parsing HTTP request):
|
||
|
|
*
|
||
|
|
* struct slre slre;
|
||
|
|
* struct cap captures[4 + 1]; // Number of braket pairs + 1
|
||
|
|
* ...
|
||
|
|
*
|
||
|
|
* slre_compile(&slre,"^(GET|POST) (\S+) HTTP/(\S+?)\r\n");
|
||
|
|
*
|
||
|
|
* if (slre_match(&slre, buf, len, captures)) {
|
||
|
|
* printf("Request line length: %d\n", captures[0].len);
|
||
|
|
* printf("Method: %.*s\n", captures[1].len, captures[1].ptr);
|
||
|
|
* printf("URI: %.*s\n", captures[2].len, captures[2].ptr);
|
||
|
|
* }
|
||
|
|
*
|
||
|
|
* Supported syntax:
|
||
|
|
* ^ Match beginning of a buffer
|
||
|
|
* $ Match end of a buffer
|
||
|
|
* () Grouping and substring capturing
|
||
|
|
* [...] Match any character from set
|
||
|
|
* [^...] Match any character but ones from set
|
||
|
|
* \s Match whitespace
|
||
|
|
* \S Match non-whitespace
|
||
|
|
* \d Match decimal digit
|
||
|
|
* \r Match carriage return
|
||
|
|
* \n Match newline
|
||
|
|
* + Match one or more times (greedy)
|
||
|
|
* +? Match one or more times (non-greedy)
|
||
|
|
* * Match zero or more times (greedy)
|
||
|
|
* *? Match zero or more times (non-greedy)
|
||
|
|
* ? Match zero or once
|
||
|
|
* \xDD Match byte with hex value 0xDD
|
||
|
|
* \meta Match one of the meta character: ^$().[*+?\
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef SLRE_HEADER_DEFINED
|
||
|
|
#define SLRE_HEADER_DEFINED
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Compiled regular expression
|
||
|
|
*/
|
||
|
|
struct slre {
|
||
|
|
unsigned char code[256];
|
||
|
|
unsigned char data[256];
|
||
|
|
int code_size;
|
||
|
|
int data_size;
|
||
|
|
int num_caps; /* Number of bracket pairs */
|
||
|
|
int anchored; /* Must match from string start */
|
||
|
|
const char *err_str; /* Error string */
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Captured substring
|
||
|
|
*/
|
||
|
|
struct cap {
|
||
|
|
const char *ptr; /* Pointer to the substring */
|
||
|
|
int len; /* Substring length */
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Compile regular expression. If success, 1 is returned.
|
||
|
|
* If error, 0 is returned and slre.err_str points to the error message.
|
||
|
|
*/
|
||
|
|
int slre_compile(struct slre *, const char *re);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return 1 if match, 0 if no match.
|
||
|
|
* If `captured_substrings' array is not NULL, then it is filled with the
|
||
|
|
* values of captured substrings. captured_substrings[0] element is always
|
||
|
|
* a full matched substring. The round bracket captures start from
|
||
|
|
* captured_substrings[1].
|
||
|
|
* It is assumed that the size of captured_substrings array is enough to
|
||
|
|
* hold all captures. The caller function must make sure it is! So, the
|
||
|
|
* array_size = number_of_round_bracket_pairs + 1
|
||
|
|
*/
|
||
|
|
int slre_match(const struct slre *, const char *buf, int buf_len,
|
||
|
|
struct cap *captured_substrings);
|
||
|
|
|
||
|
|
#ifdef SLRE_TEST
|
||
|
|
void slre_dump(const struct slre *r, FILE *fp);
|
||
|
|
#endif /* SLRE_TEST */
|
||
|
|
#endif /* SLRE_HEADER_DEFINED */
|