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Port qt_to_latin1() (and it's variants) from ushort to char16_t

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Change-Id: Id341257f0ac1d6fd1d3176fb34fad253d2bddfb9
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
This commit is contained in:
Marc Mutz 2020-05-08 22:02:20 +02:00
parent 00f6258fb6
commit 2e298c5f82
3 changed files with 13 additions and 15 deletions
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7
src/corelib/serialization/qbinaryjson_p.h
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@ -64,7 +64,7 @@ QT_REQUIRE_CONFIG(binaryjson);
QT_BEGIN_NAMESPACE
// in qstring.cpp
void qt_to_latin1_unchecked(uchar *dst, const ushort *uc, qsizetype len);
void qt_to_latin1_unchecked(uchar *dst, const char16_t *uc, qsizetype len);
/*
This defines a binary data structure for Json data. The data structure is optimised for fast reading
@ -281,10 +281,9 @@ public:
static void copy(char *dest, QStringView src)
{
Data *data = reinterpret_cast<Data *>(dest);
data->length = src.length();
data->length = src.length(); // ### narrows from int to ushort
auto *l = reinterpret_cast<uchar *>(data->latin1);
const auto *uc = reinterpret_cast<const ushort *>(src.utf16());
qt_to_latin1_unchecked(l, uc, data->length);
qt_to_latin1_unchecked(l, src.utf16(), data->length);
for (uint len = data->length; quintptr(l + len) & 0x3; ++len)
l[len] = 0;

5
src/corelib/serialization/qcborvalue.cpp
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@ -1026,7 +1026,7 @@ void QCborContainerPrivate::replaceAt_complex(Element &e, const QCborValue &valu
}
// in qstring.cpp
void qt_to_latin1_unchecked(uchar *dst, const ushort *uc, qsizetype len);
void qt_to_latin1_unchecked(uchar *dst, const char16_t *uc, qsizetype len);
Q_NEVER_INLINE void QCborContainerPrivate::appendAsciiString(QStringView s)
{
@ -1039,8 +1039,7 @@ Q_NEVER_INLINE void QCborContainerPrivate::appendAsciiString(QStringView s)
char *ptr = data.data() + e.value + sizeof(ByteData);
uchar *l = reinterpret_cast<uchar *>(ptr);
const ushort *uc = (const ushort *)s.utf16();
qt_to_latin1_unchecked(l, uc, len);
qt_to_latin1_unchecked(l, s.utf16(), len);
}
QCborValue QCborContainerPrivate::extractAt_complex(Element e)

16
src/corelib/text/qstring.cpp
View File

@ -143,7 +143,7 @@ char16_t *to_utf16(ushort *p) { return reinterpret_cast<char16_t *>(p); }
// From qstring_mips_dsp_asm.S
extern "C" void qt_fromlatin1_mips_asm_unroll4 (char16_t*, const char*, uint);
extern "C" void qt_fromlatin1_mips_asm_unroll8 (char16_t*, const char*, uint);
extern "C" void qt_toLatin1_mips_dsp_asm(uchar *dst, const ushort *src, int length);
extern "C" void qt_toLatin1_mips_dsp_asm(uchar *dst, const char16_t *src, int length);
#endif
// internal
@ -675,7 +675,7 @@ void qt_from_latin1(char16_t *dst, const char *str, size_t size) noexcept
}
template <bool Checked>
static void qt_to_latin1_internal(uchar *dst, const ushort *src, qsizetype length)
static void qt_to_latin1_internal(uchar *dst, const char16_t *src, qsizetype length)
{
#if defined(__SSE2__)
uchar *e = dst + length;
@ -831,12 +831,12 @@ static void qt_to_latin1_internal(uchar *dst, const ushort *src, qsizetype lengt
#endif
}
static void qt_to_latin1(uchar *dst, const ushort *src, qsizetype length)
static void qt_to_latin1(uchar *dst, const char16_t *src, qsizetype length)
{
qt_to_latin1_internal<true>(dst, src, length);
}
void qt_to_latin1_unchecked(uchar *dst, const ushort *src, qsizetype length)
void qt_to_latin1_unchecked(uchar *dst, const char16_t *src, qsizetype length)
{
qt_to_latin1_internal<false>(dst, src, length);
}
@ -5137,7 +5137,7 @@ static QByteArray qt_convert_to_latin1(QStringView string)
// since we own the only copy, we're going to const_cast the constData;
// that avoids an unnecessary call to detach() and expansion code that will never get used
qt_to_latin1(reinterpret_cast<uchar *>(const_cast<char *>(ba.constData())),
reinterpret_cast<const ushort *>(string.data()), string.length());
string.utf16(), string.size());
return ba;
}
@ -5148,7 +5148,7 @@ QByteArray QString::toLatin1_helper_inplace(QString &s)
// We can return our own buffer to the caller.
// Conversion to Latin-1 always shrinks the buffer by half.
const ushort *data = s.d.data();
const char16_t *data = to_utf16(s.d.data());
int length = s.d.size;
// Move the d pointer over to the bytearray.
@ -5162,8 +5162,8 @@ QByteArray QString::toLatin1_helper_inplace(QString &s)
char *ddata = ba_d.data();
// multiply the allocated capacity by sizeof(ushort)
ba_d.d_ptr()->alloc *= sizeof(ushort);
// multiply the allocated capacity by sizeof(char16_t)
ba_d.d_ptr()->alloc *= sizeof(char16_t);
// do the in-place conversion
qt_to_latin1(reinterpret_cast<uchar *>(ddata), data, length);