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use nunicode conditional case mapping (lowercase)

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This commit is contained in:
artemp
2014-11-17 11:22:47 +01:00
parent c8dea1024d
commit 66d64c7c12
2 changed files with 13 additions and 12 deletions
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21
platform/default/string_stdlib.cpp
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@@ -31,19 +31,22 @@ std::string uppercase(const std::string& str)
std::string lowercase(const std::string& str)
{
boost::u8_to_u32_iterator<std::string::const_iterator> itr(str.begin());
boost::u8_to_u32_iterator<std::string::const_iterator> end(str.end());
std::string output;
char buf[5];
for (; itr!=end; ++itr)
char lo[5];
char const* itr = str.c_str();
char const* end = itr + str.length();
char const* buf = 0;
uint32_t code_point;
for ( ; itr!=end;)
{
char const* lo = nu_tolower(*itr);
if (lo != 0) output.append(lo);
itr = _nu_tolower(itr, end, nu_utf8_read, &code_point, &buf, 0);
if (buf != 0) output.append(buf);
else
{
std::memset(buf, 0, 5);
nu_utf8_write(*itr, buf);
output.append(buf);
std::memset(lo, 0, 5);
nu_utf8_write(code_point, lo);
output.append(lo);
}
}
return output;