Commit | Line | Data |
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6dc2ca62 MD |
1 | /* |
2 | * Common Trace Format | |
3 | * | |
4 | * Strings read/write functions. | |
5 | * | |
ccd7e1c8 | 6 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
6dc2ca62 | 7 | * |
ccd7e1c8 MD |
8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
9 | * of this software and associated documentation files (the "Software"), to deal | |
10 | * in the Software without restriction, including without limitation the rights | |
11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
12 | * copies of the Software, and to permit persons to whom the Software is | |
13 | * furnished to do so, subject to the following conditions: | |
de0ba614 | 14 | * |
ccd7e1c8 MD |
15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
6dc2ca62 MD |
17 | */ |
18 | ||
847bf71a | 19 | #include <babeltrace/babeltrace.h> |
d79865b9 | 20 | #include <babeltrace/ctf/types.h> |
a3dbc794 | 21 | #include <limits.h> /* C99 limits */ |
6dc2ca62 MD |
22 | #include <string.h> |
23 | ||
c5e74408 | 24 | int ctf_string_read(struct stream_pos *ppos, struct definition *definition) |
a52d7f6a | 25 | { |
d11e9c49 MD |
26 | struct definition_string *string_definition = |
27 | container_of(definition, struct definition_string, p); | |
28 | const struct declaration_string *string_declaration = | |
29 | string_definition->declaration; | |
30 | struct ctf_stream_pos *pos = ctf_pos(ppos); | |
a52d7f6a | 31 | size_t len; |
c5e74408 | 32 | ssize_t max_len; |
47e0f2e2 | 33 | char *srcaddr; |
a52d7f6a | 34 | |
d11e9c49 | 35 | ctf_align_pos(pos, string_declaration->p.alignment); |
c5e74408 | 36 | |
d11e9c49 | 37 | srcaddr = ctf_get_pos_addr(pos); |
c5e74408 MD |
38 | /* Not counting \0 */ |
39 | max_len = pos->packet_size - pos->offset - 1; | |
40 | if (max_len < 0) | |
41 | return -EFAULT; | |
42 | len = strnlen(srcaddr, max_len) + 1; /* Add \0 */ | |
43 | /* Truncated string, unexpected. Trace probably corrupted. */ | |
44 | if (srcaddr[len - 1] != '\0') | |
45 | return -EFAULT; | |
46 | ||
d11e9c49 MD |
47 | if (string_definition->alloc_len < len) { |
48 | string_definition->value = | |
49 | g_realloc(string_definition->value, len); | |
50 | string_definition->alloc_len = len; | |
51 | } | |
847bf71a | 52 | printf_debug("CTF string read %s\n", srcaddr); |
d11e9c49 MD |
53 | memcpy(string_definition->value, srcaddr, len); |
54 | string_definition->len = len; | |
847bf71a | 55 | ctf_move_pos(pos, len * CHAR_BIT); |
c5e74408 | 56 | return 0; |
6dc2ca62 | 57 | } |
a52d7f6a | 58 | |
c5e74408 | 59 | int ctf_string_write(struct stream_pos *ppos, |
d11e9c49 | 60 | struct definition *definition) |
a52d7f6a | 61 | { |
d11e9c49 MD |
62 | struct definition_string *string_definition = |
63 | container_of(definition, struct definition_string, p); | |
64 | const struct declaration_string *string_declaration = | |
65 | string_definition->declaration; | |
66 | struct ctf_stream_pos *pos = ctf_pos(ppos); | |
a52d7f6a | 67 | size_t len; |
47e0f2e2 | 68 | char *destaddr; |
a52d7f6a | 69 | |
d11e9c49 MD |
70 | ctf_align_pos(pos, string_declaration->p.alignment); |
71 | assert(string_definition->value != NULL); | |
72 | len = string_definition->len; | |
c5e74408 MD |
73 | |
74 | if (!ctf_pos_access_ok(pos, len)) | |
75 | return -EFAULT; | |
76 | ||
d11e9c49 | 77 | if (pos->dummy) |
a52d7f6a | 78 | goto end; |
d11e9c49 | 79 | destaddr = ctf_get_pos_addr(pos); |
8563e754 | 80 | memcpy(destaddr, string_definition->value, len); |
a52d7f6a | 81 | end: |
847bf71a | 82 | ctf_move_pos(pos, len * CHAR_BIT); |
c5e74408 | 83 | return 0; |
a52d7f6a | 84 | } |