1 // © 2019 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3
4 // Fuzzer for ucasemap.
5
6 #include <cstring>
7 #include <functional>
8 #include <memory>
9 #include <stddef.h>
10 #include <stdint.h>
11 #include "fuzzer_utils.h"
12 #include "unicode/ucasemap.h"
13
14 IcuEnvironment* env = new IcuEnvironment();
15
16 template<typename T>
17 using deleted_unique_ptr = std::unique_ptr<T,std::function<void(T*)>>;
18
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)19 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
20 UErrorCode status = U_ZERO_ERROR;
21 uint8_t rnd8 = 0;
22 uint16_t rnd16 = 0;
23 uint32_t rnd32 = 0;
24
25 if (size < 7) {
26 return 0;
27 }
28 // Extract one, two, and four bytes from fuzzer data for random selection
29 // purposes.
30 rnd8 = *data;
31 data++;
32 rnd16 = *(reinterpret_cast<const uint16_t *>(data));
33 data = data + 2;
34 rnd32 = *(reinterpret_cast<const uint32_t *>(data));
35 data = data + 4;
36 size = size - 7;
37
38 std::unique_ptr<char[]> fuzzbuff(new char[size]);
39 std::memcpy(fuzzbuff.get(), data, size);
40
41 const icu::Locale& locale = GetRandomLocale(rnd16);
42 uint32_t open_flags = rnd32;
43
44 deleted_unique_ptr<UCaseMap> csm(
45 ucasemap_open(locale.getName(), open_flags, &status),
46 [](UCaseMap* map) { ucasemap_close(map); });
47
48 if (U_FAILURE(status)) {
49 return 0;
50 }
51
52 int32_t dst_size = size * 2;
53 std::unique_ptr<char[]> dst(new char[dst_size]);
54 auto src = reinterpret_cast<const char*>(fuzzbuff.get());
55
56 switch (rnd8 % 4) {
57 case 0: ucasemap_utf8ToLower(csm.get(), dst.get(), dst_size, src, size,
58 &status);
59 break;
60 case 1: ucasemap_utf8ToUpper(csm.get(), dst.get(), dst_size, src, size,
61 &status);
62 break;
63 case 2: ucasemap_utf8ToTitle(csm.get(), dst.get(), dst_size, src, size,
64 &status);
65 break;
66 case 3: ucasemap_utf8FoldCase(csm.get(), dst.get(), dst_size, src, size,
67 &status);
68 break;
69 }
70
71 return 0;
72 }
73