1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
#include "case_insensitive_string.h"
#include <library/cpp/digest/murmur/murmur.h>
#include <util/string/escape.h>
#include <array>
namespace {
template <auto ToLower>
struct TCaseInsensitiveHash {
static size_t HashTail(TMurmurHash2A<size_t>& hash, const char* data, size_t size) noexcept {
for (size_t i = 0; i < size; ++i) {
char lower = ToLower(data[i]);
hash.Update(&lower, 1);
}
return hash.Value();
}
static size_t ComputeHash(const char* s, size_t n) noexcept {
TMurmurHash2A<size_t> hash;
std::array<char, sizeof(size_t)> buf;
size_t headSize = n - n % buf.size();
for (size_t i = 0; i < headSize; i += buf.size()) {
for (size_t j = 0; j < buf.size(); ++j) {
buf[j] = ToLower(s[i + j]);
}
hash.Update(buf.data(), buf.size());
}
return HashTail(hash, s + headSize, n - headSize);
}
};
}
size_t CaseInsensitiveStringHash(const char* s, size_t n) noexcept {
return TCaseInsensitiveHash<static_cast<int(*)(int)>(std::tolower)>::ComputeHash(s, n);
}
size_t CaseInsensitiveAsciiStringHash(const char* s, size_t n) noexcept {
return TCaseInsensitiveHash<static_cast<char(*)(char)>(AsciiToLower)>::ComputeHash(s, n);
}
#define Y_DEFINE_STRING_OUT(type) \
template <> \
void Out<type>(IOutputStream& o, const type& p) { \
o.Write(p.data(), p.size()); \
}
Y_DEFINE_STRING_OUT(TCaseInsensitiveString);
Y_DEFINE_STRING_OUT(TCaseInsensitiveStringBuf);
Y_DEFINE_STRING_OUT(TCaseInsensitiveAsciiString);
Y_DEFINE_STRING_OUT(TCaseInsensitiveAsciiStringBuf);
#undef Y_DEFINE_STRING_OUT
#define Y_DEFINE_STRING_ESCAPE(type) \
type EscapeC(const type& str) { \
const auto result = EscapeC(str.data(), str.size()); \
return {result.data(), result.size()}; \
}
Y_DEFINE_STRING_ESCAPE(TCaseInsensitiveString);
Y_DEFINE_STRING_ESCAPE(TCaseInsensitiveAsciiString);
#undef Y_DEFINE_STRING_ESCAPE
|
