I/O structures accessors generation (work in progress)
[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 declaration *_struct_declaration_new(struct type *type,
28 struct declaration_scope *parent_scope);
c054553d 29static
e19c3d69 30void _struct_declaration_free(struct declaration *declaration);
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,
e19c3d69 34 struct declaration *declaration)
11796b96 35{
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36 struct declaration_struct *_struct =
37 container_of(declaration, struct declaration_struct, p);
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);
6ee5115e 47 struct type *field_type = field->declaration->type;
11796b96 48
6ee5115e 49 field_type->copy(dest, fdest, src, fsrc, field->declaration);
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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;
95 type->declaration_new = _struct_declaration_new;
96 type->declaration_free = _struct_declaration_free;
97 type->ref = 1;
e19c3d69 98 return struct_type;
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99}
100
c054553d 101static
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102struct declaration *
103 _struct_declaration_new(struct type *type,
104 struct declaration_scope *parent_scope)
11796b96 105{
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106 struct type_struct *struct_type =
107 container_of(type, struct type_struct, p);
108 struct declaration_struct *_struct;
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109 unsigned long i;
110 int ret;
c054553d 111
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112 _struct = g_new(struct declaration_struct, 1);
113 type_ref(&struct_type->p);
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114 _struct->p.type = type;
115 _struct->type = struct_type;
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116 _struct->p.ref = 1;
117 _struct->scope = new_declaration_scope(parent_scope);
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;
130 field->declaration =
131 type_field->type->declaration_new(type_field->type,
132 _struct->scope);
133 ret = register_declaration(field->name,
134 field->declaration, _struct->scope);
135 assert(!ret);
136 }
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137 return &_struct->p;
138}
139
140static
e19c3d69 141void _struct_declaration_free(struct declaration *declaration)
c054553d 142{
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143 struct declaration_struct *_struct =
144 container_of(declaration, struct declaration_struct, p);
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145 unsigned long i;
146
ac88af75 147 assert(_struct->fields->len == _struct->type->fields->len);
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148 for (i = 0; i < _struct->fields->len; i++) {
149 struct field *field = &g_array_index(_struct->fields,
150 struct field, i);
e19c3d69 151 declaration_unref(field->declaration);
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152 }
153 free_declaration_scope(_struct->scope);
e19c3d69 154 type_unref(_struct->p.type);
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155 g_free(_struct);
156}
157
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158void struct_type_add_field(struct type_struct *struct_type,
159 const char *field_name,
160 struct type *field_type)
c054553d 161{
e19c3d69 162 struct type_field *field;
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163 unsigned long index;
164
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165 g_array_set_size(struct_type->fields, struct_type->fields->len + 1);
166 index = struct_type->fields->len - 1; /* last field (new) */
167 field = &g_array_index(struct_type->fields, struct type_field, index);
11796b96 168 field->name = g_quark_from_string(field_name);
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169 type_ref(field_type);
170 field->type = field_type;
11796b96 171 /* Keep index in hash rather than pointer, because array can relocate */
e19c3d69 172 g_hash_table_insert(struct_type->fields_by_name,
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173 (gpointer) (unsigned long) field->name,
174 (gpointer) index);
175 /*
176 * Alignment of structure is the max alignment of types contained
177 * therein.
178 */
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179 struct_type->p.alignment = max(struct_type->p.alignment,
180 field_type->alignment);
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181}
182
183unsigned long
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184 struct_type_lookup_field_index(struct type_struct *struct_type,
185 GQuark field_name)
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186{
187 unsigned long index;
188
e19c3d69 189 index = (unsigned long) g_hash_table_lookup(struct_type->fields_by_name,
4c8bfb7e 190 (gconstpointer) (unsigned long) field_name);
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191 return index;
192}
193
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194/*
195 * field returned only valid as long as the field structure is not appended to.
196 */
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197struct type_field *
198 struct_type_get_field_from_index(struct type_struct *struct_type,
199 unsigned long index)
c054553d 200{
e19c3d69 201 return &g_array_index(struct_type->fields, struct type_field, index);
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202}
203
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204/*
205 * field returned only valid as long as the field structure is not appended to.
206 */
207struct field *
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208struct_declaration_get_field_from_index(struct declaration_struct *_struct,
209 unsigned long index)
11796b96 210{
e19c3d69 211 return &g_array_index(_struct->fields, struct field, index);
11796b96 212}
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