Add stddef.h include for offsetof
[babeltrace.git] / types / float.c
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1/*
2 * BabelTrace - Float Type Converter
3 *
4 * Copyright (c) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include <babeltrace/compiler.h>
448d3cc7 22#include <babeltrace/types.h>
0a46062b 23
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24void float_copy(struct stream_pos *dest, const struct format *fdest,
25 struct stream_pos *src, const struct format *fsrc,
26 const struct type_class *type_class)
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27{
28 struct type_class_float *float_class =
29 container_of(type_class, struct type_class_float, p);
30
31 if (fsrc->float_copy == fdest->float_copy) {
11d43b90 32 fsrc->float_copy(dest, src, float_class);
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33 } else {
34 double v;
35
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36 v = fsrc->double_read(src, float_class);
37 fdest->double_write(dest, float_class, v);
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38 }
39}
40
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41void float_type_free(struct type_class_float *float_class)
42{
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43 integer_type_free(float_class->exp);
44 integer_type_free(float_class->mantissa);
45 integer_type_free(float_class->sign);
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46 g_free(float_class);
47}
48
49static void _float_type_free(struct type_class *type_class)
50{
51 struct type_class_float *float_class =
52 container_of(type_class, struct type_class_float, p);
53 float_type_free(float_class);
54}
55
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56struct type_class_float *float_type_new(const char *name,
57 size_t mantissa_len,
58 size_t exp_len, int byte_order,
59 size_t alignment)
60{
61 struct type_class_float *float_class;
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62 struct type_class_integer *int_class;
63 struct type_class *type_class;
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64 int ret;
65
0a46062b 66 float_class = g_new(struct type_class_float, 1);
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67 type_class = &float_class->p;
68
69 type_class->name = g_quark_from_string(name);
70 type_class->alignment = alignment;
71 type_class->copy = float_copy;
72 type_class->free = _float_type_free;
0a46062b 73 float_class->byte_order = byte_order;
bed864a7 74
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75 float_class->sign = integer_type_new(NULL, 1,
76 byte_order, false, 1);
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77 if (!float_class->mantissa)
78 goto error_sign;
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79 float_class->mantissa = integer_type_new(NULL, mantissa_len - 1,
80 byte_order, false, 1);
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81 if (!float_class->mantissa)
82 goto error_mantissa;
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83 float_class->exp = integer_type_new(NULL, exp_len,
84 byte_order, true, 1);
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85 if (!float_class->exp)
86 goto error_exp;
87
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88 if (float_class->p.name) {
89 ret = ctf_register_type(&float_class->p);
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90 if (ret)
91 goto error_register;
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92 }
93 return float_class;
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94
95error_register:
7fe00194 96 integer_type_free(float_class->exp);
bed864a7 97error_exp:
7fe00194 98 integer_type_free(float_class->mantissa);
bed864a7 99error_mantissa:
7fe00194 100 integer_type_free(float_class->sign);
11d43b90 101error_sign:
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102 g_free(float_class);
103 return NULL;
0a46062b 104}
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