diff options
Diffstat (limited to 'src/UniConversion.cxx')
| -rw-r--r-- | src/UniConversion.cxx | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/UniConversion.cxx b/src/UniConversion.cxx index 58475687b..a695b0f3c 100644 --- a/src/UniConversion.cxx +++ b/src/UniConversion.cxx @@ -175,6 +175,17 @@ size_t UTF16FromUTF8(std::string_view sv, wchar_t *tbuf, size_t tlen) { return ui; } +size_t UTF32Length(std::string_view svu8) noexcept { + size_t ulen = 0; + for (size_t i = 0; i < svu8.length();) { + const unsigned char ch = svu8[i]; + const unsigned int byteCount = UTF8BytesOfLead[ch]; + i += byteCount; + ulen++; + } + return ulen; +} + size_t UTF32FromUTF8(std::string_view sv, unsigned int *tbuf, size_t tlen) { size_t ui = 0; for (size_t i = 0; i < sv.length();) { @@ -228,6 +239,20 @@ size_t UTF32FromUTF8(std::string_view sv, unsigned int *tbuf, size_t tlen) { return ui; } +std::wstring WStringFromUTF8(std::string_view svu8) { + if constexpr (sizeof(wchar_t) == 2) { + const size_t len16 = UTF16Length(svu8); + std::wstring ws(len16, 0); + UTF16FromUTF8(svu8, &ws[0], len16); + return ws; + } else { + const size_t len32 = UTF32Length(svu8); + std::wstring ws(len32, 0); + UTF32FromUTF8(svu8, reinterpret_cast<unsigned int *>(&ws[0]), len32); + return ws; + } +} + unsigned int UTF16FromUTF32Character(unsigned int val, wchar_t *tbuf) noexcept { if (val < SUPPLEMENTAL_PLANE_FIRST) { tbuf[0] = static_cast<wchar_t>(val); |