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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 | ||
24 | void 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 | ||
d06d03db | 40 | field_class->copy(dest, fdest, src, fsrc, &field_class->p); |
11796b96 MD |
41 | |
42 | } | |
43 | fsrc->struct_end(src, struct_class); | |
44 | fdest->struct_end(dest, struct_class); | |
45 | } | |
46 | ||
47 | void 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 | ||
54 | static 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 | ||
61 | struct 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 | ||
86 | error_register: | |
87 | g_free(struct_class); | |
88 | return NULL; | |
89 | } | |
90 | ||
91 | void 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 | ||
115 | unsigned long | |
116 | struct_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 | */ | |
129 | struct field * | |
130 | struct_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 | } |