Add structures
[babeltrace.git] / types / struct.c
CommitLineData
11796b96
MD
1/*
2 * BabelTrace - Structure Type Converter
3 *
4 * Copyright (c) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include <babeltrace/compiler.h>
22#include <babeltrace/types.h>
23
24void struct_copy(struct stream_pos *dest, const struct format *fdest,
25 struct stream_pos *src, const struct format *fsrc,
26 const struct type_class *type_class)
27{
28 struct type_class_struct *struct_class =
29 container_of(type_class, struct type_class_struct, p);
30 unsigned int i;
31
32 fsrc->struct_begin(src, struct_class);
33 fdest->struct_begin(dest, struct_class);
34
35 for (i = 0; i < struct_class->fields->len; i++) {
36 struct field *field = &g_array_index(struct_class->fields,
37 struct field, i);
38 struct type_class *field_class = field->type_class;
39
40 field_class->copy(dest, fdest, src, fsrc, type_class);
41
42 }
43 fsrc->struct_end(src, struct_class);
44 fdest->struct_end(dest, struct_class);
45}
46
47void struct_type_free(struct type_class_struct *struct_class)
48{
49 g_hash_table_destroy(struct_class->fields_by_name);
50 g_array_free(struct_class->fields, true);
51 g_free(struct_class);
52}
53
54static void _struct_type_free(struct type_class *type_class)
55{
56 struct type_class_struct *struct_class =
57 container_of(type_class, struct type_class_struct, p);
58 struct_type_free(struct_class);
59}
60
61struct type_class_struct *struct_type_new(const char *name)
62{
63 struct type_class_struct *struct_class;
64 int ret;
65
66 struct_class = g_new(struct type_class_struct, 1);
67 type_class = &float_class->p;
68
69 struct_class->fields_by_name = g_hash_table_new(g_direct_hash,
70 g_direct_equal);
71 struct_class->fields = g_array_sized_new(false, false,
72 sizeof(struct field),
73 DEFAULT_NR_STRUCT_FIELDS)
74 type_class->name = g_quark_from_string(name);
75 type_class->alignment = 1;
76 type_class->copy = struct_copy;
77 type_class->free = _struct_type_free;
78
79 if (type_class->name) {
80 ret = ctf_register_type(type_class);
81 if (ret)
82 goto error_register;
83 }
84 return struct_class;
85
86error_register:
87 g_free(struct_class);
88 return NULL;
89}
90
91void struct_type_add_field(struct type_class_struct *struct_class,
92 const char *field_name,
93 struct type_class *type_class)
94{
95 struct field *field;
96 unsigned long index;
97
98 g_array_set_size(struct_class->fields, struct_class->fields->len + 1);
99 index = struct_class->fields->len - 1; /* last field (new) */
100 field = &g_array_index(struct_class->fields, struct field, index);
101 field->name = g_quark_from_string(field_name);
102 field->type_class = type_class;
103 /* Keep index in hash rather than pointer, because array can relocate */
104 g_hash_table_insert(struct_class->fields_by_name,
105 (gpointer) (unsigned long) field->name,
106 (gpointer) index);
107 /*
108 * Alignment of structure is the max alignment of types contained
109 * therein.
110 */
111 struct_class->p.alignment = max(struct_class->p.alignment,
112 type_class->alignment);
113}
114
115unsigned long
116struct_type_lookup_field_index(struct type_class_struct *struct_class,
117 GQuark field_name)
118{
119 unsigned long index;
120
121 index = (unsigned long) g_hash_table_lookup(struct_class->fields_by_name,
122 field_name);
123 return index;
124}
125
126/*
127 * field returned only valid as long as the field structure is not appended to.
128 */
129struct field *
130struct_type_get_field_from_index(struct type_class_struct *struct_class,
131 unsigned long index)
132{
133 return &g_array_index(struct_class->fields, struct field, index);
134}
This page took 0.026793 seconds and 4 git commands to generate.