Commit | Line | Data |
---|---|---|
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 | * |
ccd7e1c8 MD |
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 | * |
ccd7e1c8 MD |
15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
11796b96 MD |
17 | */ |
18 | ||
19 | #include <babeltrace/compiler.h> | |
4c8bfb7e | 20 | #include <babeltrace/format.h> |
11796b96 | 21 | |
be85c1c7 MD |
22 | #ifndef max |
23 | #define max(a, b) ((a) < (b) ? (b) : (a)) | |
24 | #endif | |
25 | ||
c054553d | 26 | static |
e19c3d69 MD |
27 | struct declaration *_struct_declaration_new(struct type *type, |
28 | struct declaration_scope *parent_scope); | |
c054553d | 29 | static |
e19c3d69 | 30 | void _struct_declaration_free(struct declaration *declaration); |
c054553d | 31 | |
11796b96 MD |
32 | void 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 | { |
e19c3d69 MD |
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 | |
e19c3d69 MD |
41 | fsrc->struct_begin(src, struct_type); |
42 | fdest->struct_begin(dest, struct_type); | |
11796b96 | 43 | |
c054553d MD |
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); |
11796b96 MD |
50 | |
51 | } | |
e19c3d69 MD |
52 | fsrc->struct_end(src, struct_type); |
53 | fdest->struct_end(dest, struct_type); | |
11796b96 MD |
54 | } |
55 | ||
c054553d | 56 | static |
e19c3d69 | 57 | void _struct_type_free(struct type *type) |
11796b96 | 58 | { |
e19c3d69 MD |
59 | struct type_struct *struct_type = |
60 | container_of(type, struct type_struct, p); | |
c054553d | 61 | unsigned long i; |
4c8bfb7e | 62 | |
e19c3d69 | 63 | g_hash_table_destroy(struct_type->fields_by_name); |
4c8bfb7e | 64 | |
e19c3d69 | 65 | for (i = 0; i < struct_type->fields->len; i++) { |
6ee5115e | 66 | struct type_field *type_field = |
e19c3d69 MD |
67 | &g_array_index(struct_type->fields, |
68 | struct type_field, i); | |
6ee5115e | 69 | type_unref(type_field->type); |
4c8bfb7e | 70 | } |
e19c3d69 MD |
71 | g_array_free(struct_type->fields, true); |
72 | g_free(struct_type); | |
11796b96 MD |
73 | } |
74 | ||
e19c3d69 | 75 | struct type_struct *struct_type_new(const char *name) |
11796b96 | 76 | { |
e19c3d69 MD |
77 | struct type_struct *struct_type; |
78 | struct type *type; | |
11796b96 | 79 | |
e19c3d69 MD |
80 | struct_type = g_new(struct type_struct, 1); |
81 | type = &struct_type->p; | |
82 | struct_type->fields_by_name = g_hash_table_new(g_direct_hash, | |
83 | g_direct_equal); | |
84 | struct_type->fields = g_array_sized_new(FALSE, TRUE, | |
85 | sizeof(struct type_field), | |
86 | DEFAULT_NR_STRUCT_FIELDS); | |
87 | type->name = g_quark_from_string(name); | |
88 | type->alignment = 1; | |
89 | type->copy = struct_copy; | |
90 | type->type_free = _struct_type_free; | |
91 | type->declaration_new = _struct_declaration_new; | |
92 | type->declaration_free = _struct_declaration_free; | |
93 | type->ref = 1; | |
e19c3d69 | 94 | return struct_type; |
11796b96 MD |
95 | } |
96 | ||
c054553d | 97 | static |
e19c3d69 MD |
98 | struct declaration * |
99 | _struct_declaration_new(struct type *type, | |
100 | struct declaration_scope *parent_scope) | |
11796b96 | 101 | { |
e19c3d69 MD |
102 | struct type_struct *struct_type = |
103 | container_of(type, struct type_struct, p); | |
104 | struct declaration_struct *_struct; | |
ac88af75 MD |
105 | unsigned long i; |
106 | int ret; | |
c054553d | 107 | |
e19c3d69 MD |
108 | _struct = g_new(struct declaration_struct, 1); |
109 | type_ref(&struct_type->p); | |
6ee5115e MD |
110 | _struct->p.type = type; |
111 | _struct->type = struct_type; | |
c054553d MD |
112 | _struct->p.ref = 1; |
113 | _struct->scope = new_declaration_scope(parent_scope); | |
114 | _struct->fields = g_array_sized_new(FALSE, TRUE, | |
115 | sizeof(struct field), | |
116 | DEFAULT_NR_STRUCT_FIELDS); | |
ac88af75 MD |
117 | g_array_set_size(_struct->fields, struct_type->fields->len); |
118 | for (i = 0; i < struct_type->fields->len; i++) { | |
119 | struct type_field *type_field = | |
120 | &g_array_index(struct_type->fields, | |
121 | struct type_field, i); | |
122 | struct field *field = &g_array_index(_struct->fields, | |
123 | struct field, i); | |
124 | ||
125 | field->name = type_field->name; | |
126 | field->declaration = | |
127 | type_field->type->declaration_new(type_field->type, | |
128 | _struct->scope); | |
129 | ret = register_declaration(field->name, | |
130 | field->declaration, _struct->scope); | |
131 | assert(!ret); | |
132 | } | |
c054553d MD |
133 | return &_struct->p; |
134 | } | |
135 | ||
136 | static | |
e19c3d69 | 137 | void _struct_declaration_free(struct declaration *declaration) |
c054553d | 138 | { |
e19c3d69 MD |
139 | struct declaration_struct *_struct = |
140 | container_of(declaration, struct declaration_struct, p); | |
c054553d MD |
141 | unsigned long i; |
142 | ||
ac88af75 | 143 | assert(_struct->fields->len == _struct->type->fields->len); |
c054553d MD |
144 | for (i = 0; i < _struct->fields->len; i++) { |
145 | struct field *field = &g_array_index(_struct->fields, | |
146 | struct field, i); | |
e19c3d69 | 147 | declaration_unref(field->declaration); |
c054553d MD |
148 | } |
149 | free_declaration_scope(_struct->scope); | |
e19c3d69 | 150 | type_unref(_struct->p.type); |
c054553d MD |
151 | g_free(_struct); |
152 | } | |
153 | ||
e19c3d69 MD |
154 | void struct_type_add_field(struct type_struct *struct_type, |
155 | const char *field_name, | |
156 | struct type *field_type) | |
c054553d | 157 | { |
e19c3d69 | 158 | struct type_field *field; |
11796b96 MD |
159 | unsigned long index; |
160 | ||
e19c3d69 MD |
161 | g_array_set_size(struct_type->fields, struct_type->fields->len + 1); |
162 | index = struct_type->fields->len - 1; /* last field (new) */ | |
163 | field = &g_array_index(struct_type->fields, struct type_field, index); | |
11796b96 | 164 | field->name = g_quark_from_string(field_name); |
e19c3d69 MD |
165 | type_ref(field_type); |
166 | field->type = field_type; | |
11796b96 | 167 | /* Keep index in hash rather than pointer, because array can relocate */ |
e19c3d69 | 168 | g_hash_table_insert(struct_type->fields_by_name, |
11796b96 MD |
169 | (gpointer) (unsigned long) field->name, |
170 | (gpointer) index); | |
171 | /* | |
172 | * Alignment of structure is the max alignment of types contained | |
173 | * therein. | |
174 | */ | |
e19c3d69 MD |
175 | struct_type->p.alignment = max(struct_type->p.alignment, |
176 | field_type->alignment); | |
11796b96 MD |
177 | } |
178 | ||
179 | unsigned long | |
e19c3d69 MD |
180 | struct_type_lookup_field_index(struct type_struct *struct_type, |
181 | GQuark field_name) | |
11796b96 MD |
182 | { |
183 | unsigned long index; | |
184 | ||
e19c3d69 | 185 | index = (unsigned long) g_hash_table_lookup(struct_type->fields_by_name, |
4c8bfb7e | 186 | (gconstpointer) (unsigned long) field_name); |
11796b96 MD |
187 | return index; |
188 | } | |
189 | ||
c054553d MD |
190 | /* |
191 | * field returned only valid as long as the field structure is not appended to. | |
192 | */ | |
e19c3d69 MD |
193 | struct type_field * |
194 | struct_type_get_field_from_index(struct type_struct *struct_type, | |
195 | unsigned long index) | |
c054553d | 196 | { |
e19c3d69 | 197 | return &g_array_index(struct_type->fields, struct type_field, index); |
c054553d MD |
198 | } |
199 | ||
11796b96 MD |
200 | /* |
201 | * field returned only valid as long as the field structure is not appended to. | |
202 | */ | |
203 | struct field * | |
e19c3d69 MD |
204 | struct_declaration_get_field_from_index(struct declaration_struct *_struct, |
205 | unsigned long index) | |
11796b96 | 206 | { |
e19c3d69 | 207 | return &g_array_index(_struct->fields, struct field, index); |
11796b96 | 208 | } |