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lib/icu/Collate: move IcuCaseFold() to CaseFold.cxx

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This commit is contained in:
Max Kellermann
2017-09-20 23:11:58 +02:00
parent be024d4ad7
commit 5620f16330
6 changed files with 145 additions and 75 deletions
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68
src/lib/icu/Collate.cxx
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@@ -23,8 +23,6 @@
#ifdef HAVE_ICU
#include "Util.hxx"
#include "util/AllocatedArray.hxx"
#include "util/ConstBuffer.hxx"
#include "util/RuntimeError.hxx"
#include <unicode/ucol.h>
@@ -141,69 +139,3 @@ IcuCollate(const char *a, const char *b) noexcept
return strcoll(a, b);
#endif
}
AllocatedString<>
IcuCaseFold(const char *src)
try {
#ifdef HAVE_ICU
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(src != nullptr);
#endif
const auto u = UCharFromUTF8(src);
if (u.IsNull())
return AllocatedString<>::Duplicate(src);
AllocatedArray<UChar> folded(u.size() * 2u);
UErrorCode error_code = U_ZERO_ERROR;
size_t folded_length = u_strFoldCase(folded.begin(), folded.size(),
u.begin(), u.size(),
U_FOLD_CASE_DEFAULT,
&error_code);
if (folded_length == 0 || error_code != U_ZERO_ERROR)
return AllocatedString<>::Duplicate(src);
folded.SetSize(folded_length);
return UCharToUTF8({folded.begin(), folded.size()});
#elif defined(WIN32)
const auto u = MultiByteToWideChar(CP_UTF8, src);
const int size = LCMapStringEx(LOCALE_NAME_INVARIANT,
LCMAP_SORTKEY|LINGUISTIC_IGNORECASE,
u.c_str(), -1, nullptr, 0,
nullptr, nullptr, 0);
if (size <= 0)
return AllocatedString<>::Duplicate(src);
std::unique_ptr<wchar_t[]> buffer(new wchar_t[size]);
if (LCMapStringEx(LOCALE_NAME_INVARIANT,
LCMAP_SORTKEY|LINGUISTIC_IGNORECASE,
u.c_str(), -1, buffer.get(), size,
nullptr, nullptr, 0) <= 0)
return AllocatedString<>::Duplicate(src);
return WideCharToMultiByte(CP_UTF8, buffer.get());
#else
size_t size = strlen(src) + 1;
std::unique_ptr<char[]> buffer(new char[size]);
size_t nbytes = strxfrm(buffer.get(), src, size);
if (nbytes >= size) {
/* buffer too small - reallocate and try again */
buffer.reset();
size = nbytes + 1;
buffer.reset(new char[size]);
nbytes = strxfrm(buffer.get(), src, size);
}
assert(nbytes < size);
assert(buffer[nbytes] == 0);
return AllocatedString<>::Donate(buffer.release());
#endif
} catch (const std::runtime_error &) {
return AllocatedString<>::Duplicate(src);
}