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1 | // Copyright (c) 2019, Paul Dreik |
2 | // For the license information refer to format.h. | |
3 | ||
1e59de90 TL |
4 | #include <fmt/chrono.h> |
5 | ||
20effc67 TL |
6 | #include <cstdint> |
7 | #include <exception> | |
20effc67 TL |
8 | |
9 | #include "fuzzer-common.h" | |
10 | ||
1e59de90 TL |
11 | template <typename T, typename Repr> const T* from_repr(const Repr& r) { |
12 | return &r; | |
13 | } | |
20effc67 | 14 | |
1e59de90 | 15 | template <> const std::tm* from_repr<std::tm>(const std::time_t& t) { |
20effc67 TL |
16 | return std::localtime(&t); |
17 | } | |
18 | ||
19 | template <typename T, typename Repr = T> | |
20 | void invoke_fmt(const uint8_t* data, size_t size) { | |
21 | static_assert(sizeof(Repr) <= fixed_size, "Nfixed is too small"); | |
22 | if (size <= fixed_size) return; | |
23 | auto repr = assign_from_buf<Repr>(data); | |
24 | const T* value = from_repr<T>(repr); | |
25 | if (!value) return; | |
26 | data += fixed_size; | |
27 | size -= fixed_size; | |
28 | data_to_string format_str(data, size); | |
29 | try { | |
30 | #if FMT_FUZZ_FORMAT_TO_STRING | |
31 | std::string message = fmt::format(format_str.get(), *value); | |
32 | #else | |
1e59de90 TL |
33 | auto buf = fmt::memory_buffer(); |
34 | fmt::format_to(std::back_inserter(buf), format_str.get(), *value); | |
20effc67 TL |
35 | #endif |
36 | } catch (std::exception&) { | |
37 | } | |
38 | } | |
39 | ||
40 | extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { | |
41 | if (size <= 3) return 0; | |
42 | ||
43 | const auto first = data[0]; | |
44 | data++; | |
45 | size--; | |
46 | ||
47 | switch (first) { | |
48 | case 0: | |
49 | invoke_fmt<bool>(data, size); | |
50 | break; | |
51 | case 1: | |
52 | invoke_fmt<char>(data, size); | |
53 | break; | |
54 | case 2: | |
55 | invoke_fmt<unsigned char>(data, size); | |
56 | break; | |
57 | case 3: | |
58 | invoke_fmt<signed char>(data, size); | |
59 | break; | |
60 | case 4: | |
61 | invoke_fmt<short>(data, size); | |
62 | break; | |
63 | case 5: | |
64 | invoke_fmt<unsigned short>(data, size); | |
65 | break; | |
66 | case 6: | |
67 | invoke_fmt<int>(data, size); | |
68 | break; | |
69 | case 7: | |
70 | invoke_fmt<unsigned int>(data, size); | |
71 | break; | |
72 | case 8: | |
73 | invoke_fmt<long>(data, size); | |
74 | break; | |
75 | case 9: | |
76 | invoke_fmt<unsigned long>(data, size); | |
77 | break; | |
78 | case 10: | |
79 | invoke_fmt<float>(data, size); | |
80 | break; | |
81 | case 11: | |
82 | invoke_fmt<double>(data, size); | |
83 | break; | |
84 | case 12: | |
85 | invoke_fmt<long double>(data, size); | |
86 | break; | |
87 | case 13: | |
88 | invoke_fmt<std::tm, std::time_t>(data, size); | |
89 | break; | |
90 | } | |
91 | return 0; | |
92 | } |