diff options
Diffstat (limited to 'src/corelib/io/qdebug.cpp')
-rw-r--r-- | src/corelib/io/qdebug.cpp | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/corelib/io/qdebug.cpp b/src/corelib/io/qdebug.cpp index 0eaeb5ccda..ca5da10022 100644 --- a/src/corelib/io/qdebug.cpp +++ b/src/corelib/io/qdebug.cpp @@ -15,6 +15,7 @@ #include <private/qtextstream_p.h> #include <private/qtools_p.h> +#include <array> #include <q20chrono.h> QT_BEGIN_NAMESPACE @@ -436,6 +437,87 @@ void QDebug::putTimeUnit(qint64 num, qint64 den) stream->ts << timeUnit(num, den); // ### optimize } +namespace { + +#ifdef QT_SUPPORTS_INT128 + +constexpr char Q_INT128_MIN_STR[] = "-170141183460469231731687303715884105728"; + +constexpr int Int128BufferSize = sizeof(Q_INT128_MIN_STR); +using Int128Buffer = std::array<char, Int128BufferSize>; + // numeric_limits<qint128>::digits10 may not exist + +static char *i128ToStringHelper(Int128Buffer &buffer, quint128 n) +{ + auto dst = buffer.data() + buffer.size(); + *--dst = '\0'; // NUL-terminate + if (n == 0) { + *--dst = '0'; // and done + } else { + while (n != 0) { + *--dst = "0123456789"[n % 10]; + n /= 10; + } + } + return dst; +} +#endif // QT_SUPPORTS_INT128 + +[[maybe_unused]] +static const char *int128Warning() +{ + const char *msg = "Qt was not compiled with int128 support."; + qWarning("%s", msg); + return msg; +} + +} // unnamed namespace + +/*! + \since 6.7 + \internal + Helper to the qint128 debug streaming output. + */ +void QDebug::putInt128([[maybe_unused]] const void *p) +{ +#ifdef QT_SUPPORTS_INT128 + Q_ASSERT(p); + qint128 i; + memcpy(&i, p, sizeof(i)); // alignment paranoia + if (i == Q_INT128_MIN) { + // -i is not representable, hardcode the result: + stream->ts << Q_INT128_MIN_STR; + } else { + Int128Buffer buffer; + auto dst = i128ToStringHelper(buffer, i < 0 ? -i : i); + if (i < 0) + *--dst = '-'; + stream->ts << dst; + } + return; +#endif // QT_SUPPORTS_INT128 + stream->ts << int128Warning(); +} + +/*! + \since 6.7 + \internal + Helper to the quint128 debug streaming output. + */ +void QDebug::putUInt128([[maybe_unused]] const void *p) +{ +#ifdef QT_SUPPORTS_INT128 + Q_ASSERT(p); + quint128 i; + memcpy(&i, p, sizeof(i)); // alignment paranoia + Int128Buffer buffer; + stream->ts << i128ToStringHelper(buffer, i); + return; +#endif // QT_SUPPORTS_INT128 + stream->ts << int128Warning(); +} + + /*! \fn QDebug::swap(QDebug &other) \since 5.0 @@ -903,6 +985,23 @@ QDebug &QDebug::resetFormat() */ /*! + \fn template <typename T, if_qint128<T>> QDebug::operator<<(T i) + \fn template <typename T, if_quint128<T>> QDebug::operator<<(T i) + \since 6.7 + + Prints the textual representation of the 128-bit integer \a i. + + \note This operator is only available if Qt supports 128-bit integer types. + If 128-bit integer types are available in your build, but the Qt libraries + were compiled without, the operator will print a warning instead. + + \note Because the operator is a function template, no implicit conversions + are performed on its argument. It must be exactly qint128/quint128. + + \sa QT_SUPPORTS_INT128 +*/ + +/*! \fn template <class T> QString QDebug::toString(T &&object) \since 6.0 |