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20effc67 TL |
1 | // Copyright (c) 2019, Paul Dreik |
2 | // For the license information refer to format.h. | |
3 | ||
4 | #include <cstdint> | |
5 | #include <exception> | |
6 | #include <fmt/chrono.h> | |
7 | ||
8 | #include "fuzzer-common.h" | |
9 | ||
10 | template <typename T, typename Repr> | |
11 | const T* from_repr(const Repr& r) { return &r; } | |
12 | ||
13 | template <> | |
14 | const std::tm* from_repr<std::tm>(const std::time_t& t) { | |
15 | return std::localtime(&t); | |
16 | } | |
17 | ||
18 | template <typename T, typename Repr = T> | |
19 | void invoke_fmt(const uint8_t* data, size_t size) { | |
20 | static_assert(sizeof(Repr) <= fixed_size, "Nfixed is too small"); | |
21 | if (size <= fixed_size) return; | |
22 | auto repr = assign_from_buf<Repr>(data); | |
23 | const T* value = from_repr<T>(repr); | |
24 | if (!value) return; | |
25 | data += fixed_size; | |
26 | size -= fixed_size; | |
27 | data_to_string format_str(data, size); | |
28 | try { | |
29 | #if FMT_FUZZ_FORMAT_TO_STRING | |
30 | std::string message = fmt::format(format_str.get(), *value); | |
31 | #else | |
32 | fmt::memory_buffer message; | |
33 | fmt::format_to(message, format_str.get(), *value); | |
34 | #endif | |
35 | } catch (std::exception&) { | |
36 | } | |
37 | } | |
38 | ||
39 | extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { | |
40 | if (size <= 3) return 0; | |
41 | ||
42 | const auto first = data[0]; | |
43 | data++; | |
44 | size--; | |
45 | ||
46 | switch (first) { | |
47 | case 0: | |
48 | invoke_fmt<bool>(data, size); | |
49 | break; | |
50 | case 1: | |
51 | invoke_fmt<char>(data, size); | |
52 | break; | |
53 | case 2: | |
54 | invoke_fmt<unsigned char>(data, size); | |
55 | break; | |
56 | case 3: | |
57 | invoke_fmt<signed char>(data, size); | |
58 | break; | |
59 | case 4: | |
60 | invoke_fmt<short>(data, size); | |
61 | break; | |
62 | case 5: | |
63 | invoke_fmt<unsigned short>(data, size); | |
64 | break; | |
65 | case 6: | |
66 | invoke_fmt<int>(data, size); | |
67 | break; | |
68 | case 7: | |
69 | invoke_fmt<unsigned int>(data, size); | |
70 | break; | |
71 | case 8: | |
72 | invoke_fmt<long>(data, size); | |
73 | break; | |
74 | case 9: | |
75 | invoke_fmt<unsigned long>(data, size); | |
76 | break; | |
77 | case 10: | |
78 | invoke_fmt<float>(data, size); | |
79 | break; | |
80 | case 11: | |
81 | invoke_fmt<double>(data, size); | |
82 | break; | |
83 | case 12: | |
84 | invoke_fmt<long double>(data, size); | |
85 | break; | |
86 | case 13: | |
87 | invoke_fmt<std::tm, std::time_t>(data, size); | |
88 | break; | |
89 | } | |
90 | return 0; | |
91 | } |