configure: check for elfutils (libelf and libdw) >= 0.154
[babeltrace.git] / types / string.c
1 /*
2 * string.c
3 *
4 * BabelTrace - String Type Converter
5 *
6 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
7 *
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 *
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:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
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.
27 */
28
29 #include <babeltrace/compiler.h>
30 #include <babeltrace/align.h>
31 #include <babeltrace/format.h>
32 #include <babeltrace/types.h>
33
34 static
35 struct bt_definition *_string_definition_new(struct bt_declaration *declaration,
36 struct definition_scope *parent_scope,
37 GQuark field_name, int index,
38 const char *root_name);
39 static
40 void _string_definition_free(struct bt_definition *definition);
41
42 static
43 void _string_declaration_free(struct bt_declaration *declaration)
44 {
45 struct declaration_string *string_declaration =
46 container_of(declaration, struct declaration_string, p);
47 g_free(string_declaration);
48 }
49
50 struct declaration_string *
51 bt_string_declaration_new(enum ctf_string_encoding encoding)
52 {
53 struct declaration_string *string_declaration;
54
55 string_declaration = g_new(struct declaration_string, 1);
56 string_declaration->p.id = CTF_TYPE_STRING;
57 string_declaration->p.alignment = CHAR_BIT;
58 string_declaration->p.declaration_free = _string_declaration_free;
59 string_declaration->p.definition_new = _string_definition_new;
60 string_declaration->p.definition_free = _string_definition_free;
61 string_declaration->p.ref = 1;
62 string_declaration->encoding = encoding;
63 return string_declaration;
64 }
65
66 static
67 struct bt_definition *
68 _string_definition_new(struct bt_declaration *declaration,
69 struct definition_scope *parent_scope,
70 GQuark field_name, int index,
71 const char *root_name)
72 {
73 struct declaration_string *string_declaration =
74 container_of(declaration, struct declaration_string, p);
75 struct definition_string *string;
76 int ret;
77
78 string = g_new(struct definition_string, 1);
79 bt_declaration_ref(&string_declaration->p);
80 string->p.declaration = declaration;
81 string->declaration = string_declaration;
82 string->p.ref = 1;
83 /*
84 * Use INT_MAX order to ensure that all fields of the parent
85 * scope are seen as being prior to this scope.
86 */
87 string->p.index = root_name ? INT_MAX : index;
88 string->p.name = field_name;
89 string->p.path = bt_new_definition_path(parent_scope, field_name,
90 root_name);
91 string->p.scope = NULL;
92 string->value = NULL;
93 string->len = 0;
94 string->alloc_len = 0;
95 ret = bt_register_field_definition(field_name, &string->p,
96 parent_scope);
97 assert(!ret);
98 return &string->p;
99 }
100
101 static
102 void _string_definition_free(struct bt_definition *definition)
103 {
104 struct definition_string *string =
105 container_of(definition, struct definition_string, p);
106
107 bt_declaration_unref(string->p.declaration);
108 g_free(string->value);
109 g_free(string);
110 }
111
112 enum ctf_string_encoding bt_get_string_encoding(const struct bt_definition *field)
113 {
114 struct definition_string *string_definition;
115 const struct declaration_string *string_declaration;
116
117 string_definition = container_of(field, struct definition_string, p);
118 string_declaration = string_definition->declaration;
119
120 return string_declaration->encoding;
121 }
122
123 char *bt_get_string(const struct bt_definition *field)
124 {
125 struct definition_string *string_definition =
126 container_of(field, struct definition_string, p);
127
128 assert(string_definition->value != NULL);
129
130 return string_definition->value;
131 }
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