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annotate dep/fmt/test/fuzzing/one-arg.cc @ 343:1faa72660932

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*: transfer back to cmake from autotools autotools just made lots of things more complicated than they should have and many things broke (i.e. translations)
author Paper <paper@paper.us.eu.org>
date Thu, 20 Jun 2024 05:56:06 -0400
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343
1faa72660932 *: transfer back to cmake from autotools
Paper <paper@paper.us.eu.org>
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1 // Copyright (c) 2019, Paul Dreik
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2 // For the license information refer to format.h.
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3
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4 #include <fmt/chrono.h>
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5
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6 #include <cstdint>
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7 #include <exception>
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8
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9 #include "fuzzer-common.h"
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10
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11 template <typename T, typename Repr> const T* from_repr(const Repr& r) {
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12 return &r;
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13 }
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14
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15 template <> const std::tm* from_repr<std::tm>(const std::time_t& t) {
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16 return std::localtime(&t);
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17 }
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18
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19 template <typename T, typename Repr = T>
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20 void invoke_fmt(const uint8_t* data, size_t size) {
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21 static_assert(sizeof(Repr) <= fixed_size, "Nfixed is too small");
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22 if (size <= fixed_size) return;
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23 auto repr = assign_from_buf<Repr>(data);
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24 const T* value = from_repr<T>(repr);
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25 if (!value) return;
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26 data += fixed_size;
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27 size -= fixed_size;
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28 data_to_string format_str(data, size);
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29 try {
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30 #if FMT_FUZZ_FORMAT_TO_STRING
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31 std::string message = fmt::format(format_str.get(), *value);
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32 #else
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33 auto buf = fmt::memory_buffer();
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34 fmt::format_to(std::back_inserter(buf), format_str.get(), *value);
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35 #endif
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36 } catch (std::exception&) {
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37 }
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38 }
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39
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40 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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41 if (size <= 3) return 0;
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42
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43 const auto first = data[0];
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44 data++;
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45 size--;
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46
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47 switch (first) {
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48 case 0:
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49 invoke_fmt<bool>(data, size);
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50 break;
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51 case 1:
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52 invoke_fmt<char>(data, size);
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53 break;
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54 case 2:
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55 invoke_fmt<unsigned char>(data, size);
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56 break;
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57 case 3:
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58 invoke_fmt<signed char>(data, size);
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59 break;
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60 case 4:
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61 invoke_fmt<short>(data, size);
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62 break;
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63 case 5:
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64 invoke_fmt<unsigned short>(data, size);
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65 break;
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66 case 6:
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67 invoke_fmt<int>(data, size);
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68 break;
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69 case 7:
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70 invoke_fmt<unsigned int>(data, size);
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71 break;
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72 case 8:
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73 invoke_fmt<long>(data, size);
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74 break;
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75 case 9:
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76 invoke_fmt<unsigned long>(data, size);
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77 break;
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78 case 10:
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79 invoke_fmt<float>(data, size);
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80 break;
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81 case 11:
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82 invoke_fmt<double>(data, size);
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83 break;
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84 case 12:
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85 invoke_fmt<long double>(data, size);
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86 break;
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87 case 13:
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88 invoke_fmt<std::tm, std::time_t>(data, size);
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89 break;
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90 }
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91 return 0;
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92 }