1 | /* |
2 | * Copyright (c) 2015-2017, Intel Corporation |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions are met: |
6 | * |
7 | * * Redistributions of source code must retain the above copyright notice, |
8 | * this list of conditions and the following disclaimer. |
9 | * * Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * * Neither the name of Intel Corporation nor the names of its contributors |
13 | * may be used to endorse or promote products derived from this software |
14 | * without specific prior written permission. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
26 | * POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #ifndef UTIL_VERIFY_TYPES |
30 | #define UTIL_VERIFY_TYPES |
31 | |
32 | #include "ue2common.h" |
33 | #include "util/compile_error.h" |
34 | |
35 | #include <cassert> |
36 | #include <type_traits> |
37 | |
38 | namespace ue2 { |
39 | |
40 | template<typename To_T, typename From_T> |
41 | To_T verify_cast(From_T val) { |
42 | static_assert(std::is_integral<To_T>::value, |
43 | "Output type must be integral." ); |
44 | static_assert(std::is_integral<From_T>::value || |
45 | std::is_enum<From_T>::value || |
46 | std::is_convertible<From_T, To_T>::value, |
47 | "Must be integral or enum type, or convertible to output." ); |
48 | |
49 | To_T conv_val = static_cast<To_T>(val); |
50 | if (static_cast<From_T>(conv_val) != val) { |
51 | assert(0); |
52 | throw ResourceLimitError(); |
53 | } |
54 | |
55 | return conv_val; |
56 | } |
57 | |
58 | template<typename T> |
59 | s8 verify_s8(T val) { |
60 | return verify_cast<s8>(val); |
61 | } |
62 | |
63 | template<typename T> |
64 | u8 verify_u8(T val) { |
65 | return verify_cast<u8>(val); |
66 | } |
67 | |
68 | template<typename T> |
69 | s16 verify_s16(T val) { |
70 | return verify_cast<s16>(val); |
71 | } |
72 | |
73 | template<typename T> |
74 | u16 verify_u16(T val) { |
75 | return verify_cast<u16>(val); |
76 | } |
77 | |
78 | template<typename T> |
79 | s32 verify_s32(T val) { |
80 | return verify_cast<s32>(val); |
81 | } |
82 | |
83 | template<typename T> |
84 | u32 verify_u32(T val) { |
85 | return verify_cast<u32>(val); |
86 | } |
87 | |
88 | } // namespace ue2 |
89 | |
90 | #endif // UTIL_VERIFY_TYPES |
91 | |