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>
verify_cast(From_T val)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>
verify_s8(T val)59 s8 verify_s8(T val) {
60 return verify_cast<s8>(val);
61 }
62
63 template<typename T>
verify_u8(T val)64 u8 verify_u8(T val) {
65 return verify_cast<u8>(val);
66 }
67
68 template<typename T>
verify_s16(T val)69 s16 verify_s16(T val) {
70 return verify_cast<s16>(val);
71 }
72
73 template<typename T>
verify_u16(T val)74 u16 verify_u16(T val) {
75 return verify_cast<u16>(val);
76 }
77
78 template<typename T>
verify_s32(T val)79 s32 verify_s32(T val) {
80 return verify_cast<s32>(val);
81 }
82
83 template<typename T>
verify_u32(T val)84 u32 verify_u32(T val) {
85 return verify_cast<u32>(val);
86 }
87
88 } // namespace ue2
89
90 #endif // UTIL_VERIFY_TYPES
91