BadVPN – Blame information for rev 1
?pathlinks?
Rev | Author | Line No. | Line |
---|---|---|---|
1 | office | 1 | /** |
2 | * @file LexMemoryBufferInput.h |
||
3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
||
4 | * |
||
5 | * @section LICENSE |
||
6 | * |
||
7 | * Redistribution and use in source and binary forms, with or without |
||
8 | * modification, are permitted provided that the following conditions are met: |
||
9 | * 1. Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * 2. Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
13 | * documentation and/or other materials provided with the distribution. |
||
14 | * 3. Neither the name of the author nor the |
||
15 | * names of its contributors may be used to endorse or promote products |
||
16 | * derived from this software without specific prior written permission. |
||
17 | * |
||
18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
||
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
||
20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
||
21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
||
22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
||
23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
||
24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
||
25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
||
27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
28 | * |
||
29 | * @section DESCRIPTION |
||
30 | * |
||
31 | * Object that can be used by a lexer to read input from a memory buffer. |
||
32 | */ |
||
33 | |||
34 | #ifndef BADVPN_PREDICATE_LEXMEMORYBUFFERINPUT_H |
||
35 | #define BADVPN_PREDICATE_LEXMEMORYBUFFERINPUT_H |
||
36 | |||
37 | #include <string.h> |
||
38 | |||
39 | #include <misc/debug.h> |
||
40 | |||
41 | typedef struct { |
||
42 | char *buf; |
||
43 | int len; |
||
44 | int pos; |
||
45 | int error; |
||
46 | } LexMemoryBufferInput; |
||
47 | |||
48 | static void LexMemoryBufferInput_Init (LexMemoryBufferInput *input, char *buf, int len) |
||
49 | { |
||
50 | input->buf = buf; |
||
51 | input->len = len; |
||
52 | input->pos = 0; |
||
53 | input->error = 0; |
||
54 | } |
||
55 | |||
56 | static int LexMemoryBufferInput_Read (LexMemoryBufferInput *input, char *dest, int len) |
||
57 | { |
||
58 | ASSERT(dest) |
||
59 | ASSERT(len > 0) |
||
60 | |||
61 | if (input->pos >= input->len) { |
||
62 | return 0; |
||
63 | } |
||
64 | |||
65 | int to_read = input->len - input->pos; |
||
66 | if (to_read > len) { |
||
67 | to_read = len; |
||
68 | } |
||
69 | |||
70 | memcpy(dest, input->buf + input->pos, to_read); |
||
71 | input->pos += to_read; |
||
72 | |||
73 | return to_read; |
||
74 | } |
||
75 | |||
76 | static void LexMemoryBufferInput_SetError (LexMemoryBufferInput *input) |
||
77 | { |
||
78 | input->error = 1; |
||
79 | } |
||
80 | |||
81 | static int LexMemoryBufferInput_HasError (LexMemoryBufferInput *input) |
||
82 | { |
||
83 | return input->error; |
||
84 | } |
||
85 | |||
86 | #endif |