Commit | Line | Data |
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6dc2ca62 MD |
1 | /* |
2 | * Common Trace Format | |
3 | * | |
4 | * Strings read/write functions. | |
5 | * | |
64fa3fec MD |
6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation |
7 | * | |
8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6dc2ca62 | 9 | * |
ccd7e1c8 MD |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
11 | * of this software and associated documentation files (the "Software"), to deal | |
12 | * in the Software without restriction, including without limitation the rights | |
13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
14 | * copies of the Software, and to permit persons to whom the Software is | |
15 | * furnished to do so, subject to the following conditions: | |
de0ba614 | 16 | * |
ccd7e1c8 MD |
17 | * The above copyright notice and this permission notice shall be included in |
18 | * all copies or substantial portions of the Software. | |
c462e188 MD |
19 | * |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
26 | * SOFTWARE. | |
6dc2ca62 MD |
27 | */ |
28 | ||
70bd0a12 | 29 | #include <babeltrace/babeltrace-internal.h> |
d79865b9 | 30 | #include <babeltrace/ctf/types.h> |
a3dbc794 | 31 | #include <limits.h> /* C99 limits */ |
6dc2ca62 MD |
32 | #include <string.h> |
33 | ||
0d69b916 | 34 | int ctf_string_read(struct bt_stream_pos *ppos, struct bt_definition *definition) |
a52d7f6a | 35 | { |
d11e9c49 MD |
36 | struct definition_string *string_definition = |
37 | container_of(definition, struct definition_string, p); | |
38 | const struct declaration_string *string_declaration = | |
39 | string_definition->declaration; | |
40 | struct ctf_stream_pos *pos = ctf_pos(ppos); | |
a52d7f6a | 41 | size_t len; |
c5e74408 | 42 | ssize_t max_len; |
47e0f2e2 | 43 | char *srcaddr; |
a52d7f6a | 44 | |
d11e9c49 | 45 | ctf_align_pos(pos, string_declaration->p.alignment); |
c5e74408 | 46 | |
d11e9c49 | 47 | srcaddr = ctf_get_pos_addr(pos); |
670977d3 | 48 | if (pos->offset == EOF) |
df752f35 | 49 | return -EFAULT; |
c5e74408 MD |
50 | /* Not counting \0 */ |
51 | max_len = pos->packet_size - pos->offset - 1; | |
52 | if (max_len < 0) | |
53 | return -EFAULT; | |
54 | len = strnlen(srcaddr, max_len) + 1; /* Add \0 */ | |
55 | /* Truncated string, unexpected. Trace probably corrupted. */ | |
56 | if (srcaddr[len - 1] != '\0') | |
57 | return -EFAULT; | |
58 | ||
d11e9c49 MD |
59 | if (string_definition->alloc_len < len) { |
60 | string_definition->value = | |
61 | g_realloc(string_definition->value, len); | |
62 | string_definition->alloc_len = len; | |
63 | } | |
847bf71a | 64 | printf_debug("CTF string read %s\n", srcaddr); |
d11e9c49 MD |
65 | memcpy(string_definition->value, srcaddr, len); |
66 | string_definition->len = len; | |
847bf71a | 67 | ctf_move_pos(pos, len * CHAR_BIT); |
c5e74408 | 68 | return 0; |
6dc2ca62 | 69 | } |
a52d7f6a | 70 | |
1cf393f6 | 71 | int ctf_string_write(struct bt_stream_pos *ppos, |
0d69b916 | 72 | struct bt_definition *definition) |
a52d7f6a | 73 | { |
d11e9c49 MD |
74 | struct definition_string *string_definition = |
75 | container_of(definition, struct definition_string, p); | |
76 | const struct declaration_string *string_declaration = | |
77 | string_definition->declaration; | |
78 | struct ctf_stream_pos *pos = ctf_pos(ppos); | |
a52d7f6a | 79 | size_t len; |
47e0f2e2 | 80 | char *destaddr; |
a52d7f6a | 81 | |
d11e9c49 MD |
82 | ctf_align_pos(pos, string_declaration->p.alignment); |
83 | assert(string_definition->value != NULL); | |
84 | len = string_definition->len; | |
c5e74408 MD |
85 | |
86 | if (!ctf_pos_access_ok(pos, len)) | |
87 | return -EFAULT; | |
88 | ||
d11e9c49 | 89 | if (pos->dummy) |
a52d7f6a | 90 | goto end; |
d11e9c49 | 91 | destaddr = ctf_get_pos_addr(pos); |
8563e754 | 92 | memcpy(destaddr, string_definition->value, len); |
a52d7f6a | 93 | end: |
847bf71a | 94 | ctf_move_pos(pos, len * CHAR_BIT); |
c5e74408 | 95 | return 0; |
a52d7f6a | 96 | } |