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
66
67
68
69
70
71
72
73
74
75
76
77
|
#include <mbgl/util/platform.hpp>
#define NU_WITH_TOUPPER
#define NU_WITH_TOLOWER
#define NU_WITH_UTF8_WRITER
#include <libnu/libnu.h>
#include <cstring>
#include <sstream>
namespace mbgl { namespace platform {
std::string uppercase(const std::string& str)
{
std::stringstream output;
char const *itr = str.c_str(), *nitr;
char const *end = itr + str.length();
char lo[5] = { 0 };
for (; itr < end; itr = nitr)
{
uint32_t code_point = 0;
char const* buf = nullptr;
nitr = _nu_toupper(itr, end, nu_utf8_read, &code_point, &buf, nullptr);
if (buf != nullptr)
{
do
{
buf = NU_CASEMAP_DECODING_FUNCTION(buf, &code_point);
if (code_point == 0) break;
output.write(lo, nu_utf8_write(code_point, lo) - lo);
}
while (code_point != 0);
}
else
{
output.write(itr, nitr - itr);
}
}
return output.str();
}
std::string lowercase(const std::string& str)
{
std::stringstream output;
char const *itr = str.c_str(), *nitr;
char const *end = itr + str.length();
char lo[5] = { 0 };
for (; itr < end; itr = nitr)
{
uint32_t code_point = 0;
char const* buf = nullptr;
nitr = _nu_tolower(itr, end, nu_utf8_read, &code_point, &buf, nullptr);
if (buf != nullptr)
{
do
{
buf = NU_CASEMAP_DECODING_FUNCTION(buf, &code_point);
if (code_point == 0) break;
output.write(lo, nu_utf8_write(code_point, lo) - lo);
}
while (code_point != 0);
}
else
{
output.write(itr, nitr - itr);
}
}
return output.str();
}
} // namespace platform
} // namespace mbgl
|