void *swift::_swift_stdlib_unicodeCollationIterator_create(
const __swift_uint16_t *Str, __swift_uint32_t Length) {
UErrorCode ErrorCode = U_ZERO_ERROR;
#if defined(__CYGWIN__) || defined( _MSC_VER) || defined(__linux__)
UCollationElements *CollationIterator = ucol_openElements(
GetRootCollator(), reinterpret_cast<const UChar *>(Str), Length,
&ErrorCode);
#else
UCollationElements *CollationIterator = ucol_openElements(
GetRootCollator(), Str, Length, &ErrorCode);
#endif
if (U_FAILURE(ErrorCode)) {
swift::crash("_swift_stdlib_unicodeCollationIterator_create: ucol_openElements() failed.");
}
return CollationIterator;
}
/// Construct the ASCII collation table.
ASCIICollation() {
const UCollator *Collator = GetRootCollator();
for (unsigned char c = 0; c < 128; ++c) {
UErrorCode ErrorCode = U_ZERO_ERROR;
intptr_t NumCollationElts = 0;
#if defined(__CYGWIN__) || defined(_MSC_VER) || defined(__MINGW32__)
UChar Buffer[1];
#else
uint16_t Buffer[1];
#endif
Buffer[0] = c;
UCollationElements *CollationIterator =
ucol_openElements(Collator, Buffer, 1, &ErrorCode);
while (U_SUCCESS(ErrorCode)) {
intptr_t Elem = ucol_next(CollationIterator, &ErrorCode);
if (Elem != UCOL_NULLORDER) {
CollationTable[c] = Elem;
++NumCollationElts;
} else {
break;
}
}
ucol_closeElements(CollationIterator);
if (U_FAILURE(ErrorCode) || NumCollationElts != 1) {
swift::crash("Error setting up the ASCII collation table");
}
}
}
int32_t _swift_stdlib_unicode_compare_utf16_utf16(const uint16_t *LeftString,
int32_t LeftLength,
const uint16_t *RightString,
int32_t RightLength) {
return ucol_strcoll(GetRootCollator(),
LeftString, LeftLength,
RightString, RightLength);
}
/// Compares the strings via the Unicode Collation Algorithm on the root locale.
/// Results are the usual string comparison results:
/// <0 the left string is less than the right string.
/// ==0 the strings are equal according to their collation.
/// >0 the left string is greater than the right string.
int32_t
swift::_swift_stdlib_unicode_compare_utf16_utf16(const uint16_t *LeftString,
int32_t LeftLength,
const uint16_t *RightString,
int32_t RightLength) {
#if defined(__CYGWIN__) || defined(_MSC_VER) || defined(__MINGW32__)
// ICU UChar type is platform dependent. In Cygwin, it is defined
// as wchar_t which size is 2. It seems that the underlying binary
// representation is same with swift utf16 representation.
return ucol_strcoll(GetRootCollator(),
reinterpret_cast<const UChar *>(LeftString), LeftLength,
reinterpret_cast<const UChar *>(RightString), RightLength);
#else
return ucol_strcoll(GetRootCollator(),
LeftString, LeftLength,
RightString, RightLength);
#endif
}
void *swift::_swift_stdlib_unicodeCollationIterator_create(
const __swift_uint16_t *Str, __swift_uint32_t Length) {
UErrorCode ErrorCode = U_ZERO_ERROR;
UCollationElements *CollationIterator =
ucol_openElements(GetRootCollator(), reinterpret_cast<const UChar *>(Str),
Length, &ErrorCode);
if (U_FAILURE(ErrorCode)) {
swift::crash("_swift_stdlib_unicodeCollationIterator_create: ucol_openElements() failed.");
}
return CollationIterator;
}
int32_t _swift_stdlib_unicode_compare_utf8_utf8(const char *LeftString,
int32_t LeftLength,
const char *RightString,
int32_t RightLength) {
UCharIterator LeftIterator;
UCharIterator RightIterator;
UErrorCode ErrorCode = U_ZERO_ERROR;
uiter_setUTF8(&LeftIterator, LeftString, LeftLength);
uiter_setUTF8(&RightIterator, RightString, RightLength);
uint32_t Diff = ucol_strcollIter(GetRootCollator(),
&LeftIterator, &RightIterator, &ErrorCode);
if (U_FAILURE(ErrorCode)) {
swift::crash("ucol_strcollIter: Unexpected error doing utf8<->utf8 string comparison.");
}
return Diff;
}
/// Compares the strings via the Unicode Collation Algorithm on the root locale.
/// Results are the usual string comparison results:
/// <0 the left string is less than the right string.
/// ==0 the strings are equal according to their collation.
/// >0 the left string is greater than the right string.
int32_t
swift::_swift_stdlib_unicode_compare_utf8_utf16(const char *LeftString,
int32_t LeftLength,
const uint16_t *RightString,
int32_t RightLength) {
UCharIterator LeftIterator;
UCharIterator RightIterator;
UErrorCode ErrorCode = U_ZERO_ERROR;
uiter_setUTF8(&LeftIterator, LeftString, LeftLength);
#if defined(__CYGWIN__) || defined(_MSC_VER) || defined(__MINGW32__)
uiter_setString(&RightIterator, reinterpret_cast<const UChar *>(RightString),
RightLength);
#else
uiter_setString(&RightIterator, RightString, RightLength);
#endif
uint32_t Diff = ucol_strcollIter(GetRootCollator(),
&LeftIterator, &RightIterator, &ErrorCode);
if (U_FAILURE(ErrorCode)) {
swift::crash("ucol_strcollIter: Unexpected error doing utf8<->utf16 string comparison.");
}
return Diff;
}