xref: /PHP-5.3/ext/phar/phar_path_check.re (revision bc11e6fd) 
1/*
2  +----------------------------------------------------------------------+
3  | phar php single-file executable PHP extension                        |
4  +----------------------------------------------------------------------+
5  | Copyright (c) 2007-2013 The PHP Group                                |
6  +----------------------------------------------------------------------+
7  | This source file is subject to version 3.01 of the PHP license,      |
8  | that is bundled with this package in the file LICENSE, and is        |
9  | available through the world-wide-web at the following url:           |
10  | http://www.php.net/license/3_01.txt.                                 |
11  | If you did not receive a copy of the PHP license and are unable to   |
12  | obtain it through the world-wide-web, please send a note to          |
13  | license@php.net so we can mail you a copy immediately.               |
14  +----------------------------------------------------------------------+
15  | Authors: Marcus Boerger <helly@php.net>                              |
16  +----------------------------------------------------------------------+
17*/
18
19/* $Id$ */
20
21#include "phar_internal.h"
22
23phar_path_check_result phar_path_check(char **s, int *len, const char **error)
24{
25	const unsigned char *p = (const unsigned char*)*s;
26	const unsigned char *m;
27
28	if (*len == 1 && *p == '.') {
29		*error = "current directory reference";
30		return pcr_err_curr_dir;
31	} else if (*len == 2 && p[0] == '.' && p[1] == '.') {
32		*error = "upper directory reference";
33		return pcr_err_up_dir;
34	}
35
36#define YYCTYPE         unsigned char
37#define YYCURSOR        p
38#define YYLIMIT         p+*len
39#define YYMARKER        m
40#define YYFILL(n)
41
42loop:
43/*!re2c
44END = "\x00";
45ILL = [\x01-\x19\x80-\xFF];
46EOS = "/" | END;
47ANY = .;
48"//" 	{
49			*error = "double slash";
50			return pcr_err_double_slash;
51		}
52"/.." EOS {
53			*error = "upper directory reference";
54			return pcr_err_up_dir;
55		}
56"/." EOS {
57			*error = "current directory reference";
58			return pcr_err_curr_dir;
59		}
60"\\" {
61			*error = "back-slash";
62			return pcr_err_back_slash;
63		}
64"*" {
65			*error = "star";
66			return pcr_err_star;
67		}
68"?"	{
69			if (**s == '/') {
70				(*s)++;
71			}
72			*len = (p - (const unsigned char*)*s) -1;
73			*error = NULL;
74			return pcr_use_query;
75		}
76ILL {
77			*error ="illegal character";
78			return pcr_err_illegal_char;
79		}
80END {
81			if (**s == '/') {
82				(*s)++;
83				(*len)--;
84			}
85			if ((p - (const unsigned char*)*s) - 1 != *len)
86			{
87				*error ="illegal character";
88				return pcr_err_illegal_char;
89			}
90			*error = NULL;
91			return pcr_is_ok;
92		}
93ANY {
94			goto loop;
95		}
96*/
97}
98