Babeltrace type: build warning cleanup
[babeltrace.git] / types / struct.c
CommitLineData
11796b96 1/*
ccd7e1c8 2 * struct.c
11796b96 3 *
ccd7e1c8 4 * BabelTrace - Structure Type Converter
11796b96 5 *
ccd7e1c8 6 * Copyright 2010 - 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
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26void struct_copy(struct stream_pos *dest, const struct format *fdest,
27 struct stream_pos *src, const struct format *fsrc,
28 const struct type_class *type_class)
29{
30 struct type_class_struct *struct_class =
31 container_of(type_class, struct type_class_struct, p);
32 unsigned int i;
33
34 fsrc->struct_begin(src, struct_class);
35 fdest->struct_begin(dest, struct_class);
36
37 for (i = 0; i < struct_class->fields->len; i++) {
38 struct field *field = &g_array_index(struct_class->fields,
39 struct field, i);
40 struct type_class *field_class = field->type_class;
41
4c8bfb7e 42 field_class->copy(dest, fdest, src, fsrc, field_class);
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43
44 }
45 fsrc->struct_end(src, struct_class);
46 fdest->struct_end(dest, struct_class);
47}
48
49void struct_type_free(struct type_class_struct *struct_class)
50{
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51 unsigned int i;
52
11796b96 53 g_hash_table_destroy(struct_class->fields_by_name);
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54
55 for (i = 0; i < struct_class->fields->len; i++) {
56 struct field *field = &g_array_index(struct_class->fields,
57 struct field, i);
58 type_unref(field->type_class);
59 }
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60 g_array_free(struct_class->fields, true);
61 g_free(struct_class);
62}
63
64static void _struct_type_free(struct type_class *type_class)
65{
66 struct type_class_struct *struct_class =
67 container_of(type_class, struct type_class_struct, p);
68 struct_type_free(struct_class);
69}
70
71struct type_class_struct *struct_type_new(const char *name)
72{
73 struct type_class_struct *struct_class;
4c8bfb7e 74 struct type_class *type_class;
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75 int ret;
76
77 struct_class = g_new(struct type_class_struct, 1);
4c8bfb7e 78 type_class = &struct_class->p;
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79
80 struct_class->fields_by_name = g_hash_table_new(g_direct_hash,
81 g_direct_equal);
82 struct_class->fields = g_array_sized_new(false, false,
83 sizeof(struct field),
4c8bfb7e 84 DEFAULT_NR_STRUCT_FIELDS);
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85 type_class->name = g_quark_from_string(name);
86 type_class->alignment = 1;
87 type_class->copy = struct_copy;
88 type_class->free = _struct_type_free;
4c8bfb7e 89 type_class->ref = 1;
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90
91 if (type_class->name) {
be85c1c7 92 ret = register_type(type_class);
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93 if (ret)
94 goto error_register;
95 }
96 return struct_class;
97
98error_register:
99 g_free(struct_class);
100 return NULL;
101}
102
103void struct_type_add_field(struct type_class_struct *struct_class,
104 const char *field_name,
105 struct type_class *type_class)
106{
107 struct field *field;
108 unsigned long index;
109
110 g_array_set_size(struct_class->fields, struct_class->fields->len + 1);
111 index = struct_class->fields->len - 1; /* last field (new) */
112 field = &g_array_index(struct_class->fields, struct field, index);
113 field->name = g_quark_from_string(field_name);
4c8bfb7e 114 type_ref(type_class);
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115 field->type_class = type_class;
116 /* Keep index in hash rather than pointer, because array can relocate */
117 g_hash_table_insert(struct_class->fields_by_name,
118 (gpointer) (unsigned long) field->name,
119 (gpointer) index);
120 /*
121 * Alignment of structure is the max alignment of types contained
122 * therein.
123 */
124 struct_class->p.alignment = max(struct_class->p.alignment,
125 type_class->alignment);
126}
127
128unsigned long
129struct_type_lookup_field_index(struct type_class_struct *struct_class,
130 GQuark field_name)
131{
132 unsigned long index;
133
134 index = (unsigned long) g_hash_table_lookup(struct_class->fields_by_name,
4c8bfb7e 135 (gconstpointer) (unsigned long) field_name);
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136 return index;
137}
138
139/*
140 * field returned only valid as long as the field structure is not appended to.
141 */
142struct field *
143struct_type_get_field_from_index(struct type_class_struct *struct_class,
144 unsigned long index)
145{
146 return &g_array_index(struct_class->fields, struct field, index);
147}
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