Add float type class to babeltrace types
[babeltrace.git] / types / float.c
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MD
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>
22
23size_t float_copy(unsigned char *dest, const struct format *fdest,
24 const unsigned char *src, const struct format *fsrc,
25 const struct type_class *type_class)
26{
27 struct type_class_float *float_class =
28 container_of(type_class, struct type_class_float, p);
29
30 if (fsrc->float_copy == fdest->float_copy) {
31 fsrc->float_copy(dest, float_class, src, float_class);
32 return float_class->mantissa_len + float_class->exp_len;
33 } else {
34 double v;
35
36 v = fsrc->double_read(src, fsrc);
37 return fdest->double_write(dest, fdest, v);
38 }
39}
40
41struct type_class_float *float_type_new(const char *name,
42 size_t mantissa_len,
43 size_t exp_len, int byte_order,
44 size_t alignment)
45{
46 struct type_class_float *float_class;
47 int ret;
48
49 /*
50 * Freed when type is unregistered.
51 */
52 float_class = g_new(struct type_class_float, 1);
53 float_class->p.name = g_quark_from_string(name);
54 float_class->p.alignment = alignment;
55 float_class->mantissa_len = mantissa_len;
56 float_class->exp_len = exp_len;
57 float_class->byte_order = byte_order;
58 if (float_class->p.name) {
59 ret = ctf_register_type(&float_class->p);
60 if (ret) {
61 g_free(float_class);
62 return NULL;
63 }
64 }
65 return float_class;
66}
67
68void float_type_free(struct type_class_float *float_class)
69{
70 if (!float_class->name)
71 g_free(float_class);
72}
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