Rename "declaration" to "definition"
[babeltrace.git] / types / struct.c
CommitLineData
11796b96 1/*
ccd7e1c8 2 * struct.c
11796b96 3 *
ccd7e1c8 4 * BabelTrace - Structure Type Converter
11796b96 5 *
c054553d 6 * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
11796b96 7 *
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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:
11796b96 14 *
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15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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17 */
18
19#include <babeltrace/compiler.h>
4c8bfb7e 20#include <babeltrace/format.h>
11796b96 21
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22#ifndef max
23#define max(a, b) ((a) < (b) ? (b) : (a))
24#endif
25
c054553d 26static
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27struct definition *_struct_definition_new(struct type *type,
28 struct definition_scope *parent_scope);
c054553d 29static
e1151715 30void _struct_definition_free(struct definition *definition);
c054553d 31
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32void struct_copy(struct stream_pos *dest, const struct format *fdest,
33 struct stream_pos *src, const struct format *fsrc,
e1151715 34 struct definition *definition)
11796b96 35{
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36 struct definition_struct *_struct =
37 container_of(definition, struct definition_struct, p);
e19c3d69 38 struct type_struct *struct_type = _struct->type;
c054553d 39 unsigned long i;
11796b96 40
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41 fsrc->struct_begin(src, struct_type);
42 fdest->struct_begin(dest, struct_type);
11796b96 43
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44 for (i = 0; i < _struct->fields->len; i++) {
45 struct field *field = &g_array_index(_struct->fields,
11796b96 46 struct field, i);
e1151715 47 struct type *field_type = field->definition->type;
11796b96 48
e1151715 49 field_type->copy(dest, fdest, src, fsrc, field->definition);
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50
51 }
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52 fsrc->struct_end(src, struct_type);
53 fdest->struct_end(dest, struct_type);
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54}
55
c054553d 56static
e19c3d69 57void _struct_type_free(struct type *type)
11796b96 58{
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59 struct type_struct *struct_type =
60 container_of(type, struct type_struct, p);
c054553d 61 unsigned long i;
4c8bfb7e 62
64893f33 63 free_type_scope(struct_type->scope);
e19c3d69 64 g_hash_table_destroy(struct_type->fields_by_name);
4c8bfb7e 65
e19c3d69 66 for (i = 0; i < struct_type->fields->len; i++) {
6ee5115e 67 struct type_field *type_field =
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68 &g_array_index(struct_type->fields,
69 struct type_field, i);
6ee5115e 70 type_unref(type_field->type);
4c8bfb7e 71 }
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72 g_array_free(struct_type->fields, true);
73 g_free(struct_type);
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74}
75
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76struct type_struct *struct_type_new(const char *name,
77 struct type_scope *parent_scope)
11796b96 78{
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79 struct type_struct *struct_type;
80 struct type *type;
11796b96 81
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82 struct_type = g_new(struct type_struct, 1);
83 type = &struct_type->p;
84 struct_type->fields_by_name = g_hash_table_new(g_direct_hash,
85 g_direct_equal);
86 struct_type->fields = g_array_sized_new(FALSE, TRUE,
87 sizeof(struct type_field),
88 DEFAULT_NR_STRUCT_FIELDS);
64893f33 89 struct_type->scope = new_type_scope(parent_scope);
05628561 90 type->id = CTF_TYPE_STRUCT;
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91 type->name = g_quark_from_string(name);
92 type->alignment = 1;
93 type->copy = struct_copy;
94 type->type_free = _struct_type_free;
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95 type->definition_new = _struct_definition_new;
96 type->definition_free = _struct_definition_free;
e19c3d69 97 type->ref = 1;
e19c3d69 98 return struct_type;
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99}
100
c054553d 101static
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102struct definition *
103 _struct_definition_new(struct type *type,
104 struct definition_scope *parent_scope)
11796b96 105{
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106 struct type_struct *struct_type =
107 container_of(type, struct type_struct, p);
e1151715 108 struct definition_struct *_struct;
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109 unsigned long i;
110 int ret;
c054553d 111
e1151715 112 _struct = g_new(struct definition_struct, 1);
e19c3d69 113 type_ref(&struct_type->p);
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114 _struct->p.type = type;
115 _struct->type = struct_type;
c054553d 116 _struct->p.ref = 1;
e1151715 117 _struct->scope = new_definition_scope(parent_scope);
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118 _struct->fields = g_array_sized_new(FALSE, TRUE,
119 sizeof(struct field),
120 DEFAULT_NR_STRUCT_FIELDS);
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121 g_array_set_size(_struct->fields, struct_type->fields->len);
122 for (i = 0; i < struct_type->fields->len; i++) {
123 struct type_field *type_field =
124 &g_array_index(struct_type->fields,
125 struct type_field, i);
126 struct field *field = &g_array_index(_struct->fields,
127 struct field, i);
128
129 field->name = type_field->name;
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130 field->definition =
131 type_field->type->definition_new(type_field->type,
ac88af75 132 _struct->scope);
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133 ret = register_field_definition(field->name,
134 field->definition,
135 _struct->scope);
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136 assert(!ret);
137 }
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138 return &_struct->p;
139}
140
141static
e1151715 142void _struct_definition_free(struct definition *definition)
c054553d 143{
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144 struct definition_struct *_struct =
145 container_of(definition, struct definition_struct, p);
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146 unsigned long i;
147
ac88af75 148 assert(_struct->fields->len == _struct->type->fields->len);
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149 for (i = 0; i < _struct->fields->len; i++) {
150 struct field *field = &g_array_index(_struct->fields,
151 struct field, i);
e1151715 152 definition_unref(field->definition);
c054553d 153 }
e1151715 154 free_definition_scope(_struct->scope);
e19c3d69 155 type_unref(_struct->p.type);
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156 g_free(_struct);
157}
158
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159void struct_type_add_field(struct type_struct *struct_type,
160 const char *field_name,
161 struct type *field_type)
c054553d 162{
e19c3d69 163 struct type_field *field;
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164 unsigned long index;
165
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166 g_array_set_size(struct_type->fields, struct_type->fields->len + 1);
167 index = struct_type->fields->len - 1; /* last field (new) */
168 field = &g_array_index(struct_type->fields, struct type_field, index);
11796b96 169 field->name = g_quark_from_string(field_name);
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170 type_ref(field_type);
171 field->type = field_type;
11796b96 172 /* Keep index in hash rather than pointer, because array can relocate */
e19c3d69 173 g_hash_table_insert(struct_type->fields_by_name,
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174 (gpointer) (unsigned long) field->name,
175 (gpointer) index);
176 /*
177 * Alignment of structure is the max alignment of types contained
178 * therein.
179 */
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180 struct_type->p.alignment = max(struct_type->p.alignment,
181 field_type->alignment);
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182}
183
184unsigned long
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185 struct_type_lookup_field_index(struct type_struct *struct_type,
186 GQuark field_name)
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187{
188 unsigned long index;
189
e19c3d69 190 index = (unsigned long) g_hash_table_lookup(struct_type->fields_by_name,
4c8bfb7e 191 (gconstpointer) (unsigned long) field_name);
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192 return index;
193}
194
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195/*
196 * field returned only valid as long as the field structure is not appended to.
197 */
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198struct type_field *
199 struct_type_get_field_from_index(struct type_struct *struct_type,
200 unsigned long index)
c054553d 201{
e19c3d69 202 return &g_array_index(struct_type->fields, struct type_field, index);
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203}
204
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205/*
206 * field returned only valid as long as the field structure is not appended to.
207 */
208struct field *
e1151715 209struct_definition_get_field_from_index(struct definition_struct *_struct,
e19c3d69 210 unsigned long index)
11796b96 211{
e19c3d69 212 return &g_array_index(_struct->fields, struct field, index);
11796b96 213}
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