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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* Samba Unix/Linux SMB client library
*
* Copyright (C) Gregor Beck 2010
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file srprs.h
* @author Gregor Beck <gb@sernet.de>
* @date Aug 2010
*
* @brief A simple recursive parser.
*
* This file contains functions which may be used to build a simple recursive
* parser. They all take the parse position as their first argument. If they
* match the parse position and the output arguments are updated accordingly and
* true is returned else no argument is altered. For arguments of type @ref cbuf
* this may hold only up to the current write position.
*/
#ifndef __SRPRS_H
#define __SRPRS_H
struct cbuf;
/**
* Matches any amount of whitespace.
*
* @see isspace
* @param ptr parse position
*
* @return true
*/
bool srprs_skipws(const char** ptr);
/**
* Match a single character.
*
* @param[in,out] ptr parse position
* @param c the character to match
*
* @return true if matched
*/
bool srprs_char(const char** ptr, char c);
/**
* Match a string.
*
* @param[in,out] ptr parse position
* @param str string to match
* @param len number of bytes to compare, -1 means strlen(str)
*
* @return true if matched
*/
bool srprs_str(const char** ptr, const char* str, ssize_t len);
/**
* Match a single character from a set.
* Didn't match '\\0'
*
* @param[in,out] ptr parse position
* @param[in] set the character set to look for
* @param[out] oss output buffer where to put the match, may be NULL
*
* @return true if matched
*/
bool srprs_charset(const char** ptr, const char* set, struct cbuf* oss);
/**
* Match a single character not in set.
* Didn't match '\\0'
*
* @param[in,out] ptr parse position
* @param[in] set the character set to look for
* @param[out] oss output buffer where to put the match, may be NULL
*
* @return true if matched
*/
bool srprs_charsetinv(const char** ptr, const char* set, struct cbuf* oss);
/**
* Match a quoted string.
*
*
* If cont is not NULL the match may span multiple invocations.
* @code
* const char* start = "\"start...";
* const char* cont = "continued...";
* const char* end = "end\"";
* bool cont = false;
* cbuf* out = cbuf_new(talloc_tos());
* srprs_quoted_string(&start, out, &cont);
* assert(*cont == true);
* srprs_quoted_string(&cont, out, &cont);
* assert(*cont == true);
* srprs_quoted_string(&end, out, &cont);
* assert(*cont == false);
* assert(strcmp(cbuf_gets(out, 0), "start...continued...end")==0);
* @endcode
* @see cbuf_print_quoted_string
*
* @param[in,out] ptr parse position
* @param[out] str output buffer where to put the match
* @param[in,out] cont
*
* @return true if matched
*/
bool srprs_quoted_string(const char** ptr, struct cbuf* str, bool* cont);
/**
* Match a hex string.
*
* @param[in,out] ptr parse position
* @param len maximum number of digits to match
* @param[out] u value of the match
*
* @return true if matched
*/
bool srprs_hex(const char** ptr, size_t len, unsigned* u);
/**
* Match the empty string at End Of String.
* It doesn't consume the '\\0' unlike
* @code
* srprs_char(ptr, '\0', NULL);
* @endcode
*
* @param[in,out] ptr parse position
*
* @return true if **ptr == '\\0'
*/
bool srprs_eos(const char** ptr);
/**
* Match a newline.
* A newline is either '\\n' (LF), '\\r' (CR), or "\r\n" (CRLF)
*
* @param[in,out] ptr parse position
* @param[out] nl output buffer where to put the match, may be NULL
*
* @return true if matched
*/
bool srprs_nl(const char** ptr, struct cbuf* nl);
/**
* Match a newline or eos.
*
* @param ptr parse position
* @param nl output buffer where to put the match, may be NULL
*
* @return true if matched
*/
bool srprs_eol(const char** ptr, struct cbuf* nl);
/**
* Match a line up to but not including the newline.
*
* @param[in,out] ptr parse position
* @param[out] str output buffer where to put the match, may be NULL
*
* @return true
*/
bool srprs_line(const char** ptr, struct cbuf* str);
/**
* Match a quoted string with escaped characters.
* @see cbuf_print_quoted
*
* @param[in,out] ptr parse position
* @param[out] str output buffer where to put the match
*
* @return true if matched
*/
bool srprs_quoted(const char** ptr, struct cbuf* str);
#endif /* __SRPRS_H */
|
