Definition scope: update
[babeltrace.git] / types / float.c
1 /*
2 * float.c
3 *
4 * BabelTrace - Float Type Converter
5 *
6 * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 *
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:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 */
18
19 #include <babeltrace/compiler.h>
20 #include <babeltrace/format.h>
21
22 static
23 struct definition *_float_definition_new(struct declaration *declaration,
24 struct definition_scope *parent_scope,
25 GQuark field_name, int index);
26 static
27 void _float_definition_free(struct definition *definition);
28
29 void float_copy(struct stream_pos *destp,
30 const struct format *fdest,
31 struct stream_pos *srcp,
32 const struct format *fsrc,
33 struct definition *definition)
34 {
35 struct definition_float *_float =
36 container_of(definition, struct definition_float, p);
37 struct declaration_float *float_declaration = _float->declaration;
38
39 if (fsrc->float_copy == fdest->float_copy) {
40 fsrc->float_copy(destp, srcp, float_declaration);
41 } else {
42 double v;
43
44 v = fsrc->double_read(srcp, float_declaration);
45 fdest->double_write(destp, float_declaration, v);
46 }
47 }
48
49 static
50 void _float_declaration_free(struct declaration *declaration)
51 {
52 struct declaration_float *float_declaration =
53 container_of(declaration, struct declaration_float, p);
54
55 declaration_unref(&float_declaration->exp->p);
56 declaration_unref(&float_declaration->mantissa->p);
57 declaration_unref(&float_declaration->sign->p);
58 g_free(float_declaration);
59 }
60
61 struct declaration_float *
62 float_declaration_new(const char *name, size_t mantissa_len,
63 size_t exp_len, int byte_order, size_t alignment)
64 {
65 struct declaration_float *float_declaration;
66 struct declaration *declaration;
67
68 float_declaration = g_new(struct declaration_float, 1);
69 declaration = &float_declaration->p;
70 declaration->id = CTF_TYPE_FLOAT;
71 declaration->name = g_quark_from_string(name);
72 declaration->alignment = alignment;
73 declaration->copy = float_copy;
74 declaration->declaration_free = _float_declaration_free;
75 declaration->definition_new = _float_definition_new;
76 declaration->definition_free = _float_definition_free;
77 declaration->ref = 1;
78 float_declaration->byte_order = byte_order;
79
80 float_declaration->sign = integer_declaration_new(NULL, 1,
81 byte_order, false, 1);
82 float_declaration->mantissa = integer_declaration_new(NULL, mantissa_len - 1,
83 byte_order, false, 1);
84 float_declaration->exp = integer_declaration_new(NULL, exp_len,
85 byte_order, true, 1);
86 return float_declaration;
87 }
88
89 static
90 struct definition *
91 _float_definition_new(struct declaration *declaration,
92 struct definition_scope *parent_scope,
93 GQuark field_name, int index)
94 {
95 struct declaration_float *float_declaration =
96 container_of(declaration, struct declaration_float, p);
97 struct definition_float *_float;
98
99 _float = g_new(struct definition_float, 1);
100 declaration_ref(&float_declaration->p);
101 _float->p.declaration = declaration;
102 _float->declaration = float_declaration;
103 _float->p.ref = 1;
104 _float->p.index = index;
105 _float->value = 0.0;
106 return &_float->p;
107 }
108
109 static
110 void _float_definition_free(struct definition *definition)
111 {
112 struct definition_float *_float =
113 container_of(definition, struct definition_float, p);
114
115 declaration_unref(_float->p.declaration);
116 g_free(_float);
117 }
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