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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2020 Andreas Sandberg <andreas@sandberg.pp.se> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program 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 | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include <glib.h> | |
22 | #include <libsigrok/libsigrok.h> | |
23 | #include "libsigrok-internal.h" | |
24 | ||
25 | SR_PRIV int bv_get_value(float *out, const struct binary_value_spec *spec, | |
26 | const uint8_t *data, size_t length) | |
27 | { | |
28 | float value; | |
29 | ||
30 | if (!out || !spec || !data) | |
31 | return SR_ERR_ARG; | |
32 | ||
33 | #define VALUE_TYPE(T, R, L) \ | |
34 | case T: \ | |
35 | if (spec->offset + (L) > length) \ | |
36 | return SR_ERR_DATA; \ | |
37 | value = R(data + spec->offset); \ | |
38 | break | |
39 | ||
40 | switch (spec->type) { | |
41 | VALUE_TYPE(BVT_UINT8, read_u8, sizeof(uint8_t)); | |
42 | ||
43 | VALUE_TYPE(BVT_BE_UINT16, read_u16be, sizeof(uint16_t)); | |
44 | VALUE_TYPE(BVT_BE_UINT24, read_u24be, 3 * sizeof(uint8_t)); | |
45 | VALUE_TYPE(BVT_BE_UINT32, read_u32be, sizeof(uint32_t)); | |
46 | VALUE_TYPE(BVT_BE_UINT64, read_u64be, sizeof(uint64_t)); | |
47 | VALUE_TYPE(BVT_BE_FLOAT, read_fltbe, sizeof(float)); | |
48 | ||
49 | VALUE_TYPE(BVT_LE_UINT16, read_u16le, sizeof(uint16_t)); | |
50 | VALUE_TYPE(BVT_LE_UINT24, read_u24le, 3 * sizeof(uint8_t)); | |
51 | VALUE_TYPE(BVT_LE_UINT32, read_u32le, sizeof(uint32_t)); | |
52 | VALUE_TYPE(BVT_LE_UINT64, read_u64le, sizeof(uint64_t)); | |
53 | VALUE_TYPE(BVT_LE_FLOAT, read_fltle, sizeof(float)); | |
54 | ||
55 | default: | |
56 | return SR_ERR_ARG; | |
57 | } | |
58 | ||
59 | #undef VALUE_TYPE | |
60 | ||
61 | if (out) | |
62 | *out = value; | |
63 | return SR_OK; | |
64 | } |