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Add tool in StringUtils to make country flag

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This commit is contained in:
Benau 2019-06-16 01:40:06 +08:00
parent c57a6a3d0d
commit 8df24aedab
1 changed files with 34 additions and 0 deletions
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34
src/utils/string_utils.hpp
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@ -241,7 +241,41 @@ namespace StringUtils
} // parseString
// ------------------------------------------------------------------------
/** Return country flag (in regional indicators) from 2-letter country
* code. */
inline irr::core::stringw getCountryFlag(const std::string& country_code)
{
if (country_code.empty() || country_code.size() != 2)
return L"";
uint32_t flag[3] =
{
(uint32_t)(country_code[0]) + 127397,
(uint32_t)(country_code[1]) + 127397,
0
};
if (sizeof(wchar_t) == 4)
{
return (wchar_t*)flag;
}
else if (sizeof(wchar_t) == 2)
{
flag[0] -= 0x10000;
flag[1] -= 0x10000;
wchar_t u16[5] =
{
//make a surrogate pair
static_cast<wchar_t>((flag[0] >> 10) + 0xd800),
static_cast<wchar_t>((flag[0] & 0x3ff) + 0xdc00),
static_cast<wchar_t>((flag[1] >> 10) + 0xd800),
static_cast<wchar_t>((flag[1] & 0x3ff) + 0xdc00),
0
};
return u16;
}
return L"";
} // getCountryFlag
// ------------------------------------------------------------------------
irr::core::stringw utf8ToWide(const char* input);
irr::core::stringw utf8ToWide(const std::string &input);
std::u32string utf8ToUtf32(const std::string &input);