qtools_p.h File Reference

(db36dc71b3e3ea8490ac60dc2e60907888d7e33c)

#include "QtCore/private/qglobal_p.h"
#include <QtCore/qbytearrayalgorithms.h>
#include <QtCore/private/qnumeric_p.h>
#include <cerrno>
#include <cstdlib>

Include dependency graph for qtools_p.h:

Go to the source code of this file.

Classes
struct	CalculateGrowingBlockSizeResult

Namespaces
namespace	QtMiscUtils

Functions
constexpr char	QtMiscUtils::toHexUpper (char32_t value) noexcept
constexpr char	QtMiscUtils::toHexLower (char32_t value) noexcept
constexpr bool	QtMiscUtils::isHexDigit (char32_t c) noexcept
constexpr int	QtMiscUtils::fromHex (char32_t c) noexcept
constexpr char	QtMiscUtils::toOct (char32_t value) noexcept
constexpr bool	QtMiscUtils::isOctalDigit (char32_t c) noexcept
constexpr int	QtMiscUtils::fromOct (char32_t c) noexcept
constexpr bool	QtMiscUtils::isAsciiDigit (char32_t c) noexcept
constexpr bool	QtMiscUtils::isAsciiLower (char32_t c) noexcept
constexpr bool	QtMiscUtils::isAsciiLetterOrNumber (char32_t c) noexcept
constexpr char	QtMiscUtils::toAsciiUpper (char ch) noexcept
constexpr int	QtMiscUtils::isAsciiPrintable (char32_t ch) noexcept
constexpr int	QtMiscUtils::qt_lencmp (qsizetype lhs, qsizetype rhs) noexcept
void *	qt_reallocarray (void *p, size_t n, size_t s)
qsizetype Q_CORE_EXPORT Q_DECL_CONST_FUNCTION	qCalculateBlockSize (qsizetype elementCount, qsizetype elementSize, qsizetype headerSize=0) noexcept
CalculateGrowingBlockSizeResult Q_CORE_EXPORT Q_DECL_CONST_FUNCTION	qCalculateGrowingBlockSize (qsizetype elementCount, qsizetype elementSize, qsizetype headerSize=0) noexcept

Function Documentation

qCalculateBlockSize()

qsizetype Q_CORE_EXPORT Q_DECL_CONST_FUNCTION qCalculateBlockSize ( qsizetype elementCount, qsizetype elementSize, qsizetype headerSize )

noexcept

Since

5.7

Returns the memory block size for a container containing elementCount elements, each of elementSize bytes, plus a header of headerSize bytes. That is, this function returns {elementCount * elementSize + headerSize}

but unlike the simple calculation, it checks for overflows during the multiplication and the addition.

Both elementCount and headerSize can be zero, but elementSize cannot.

This function returns -1 on overflow or if the memory block size would not fit a qsizetype.

Definition at line 54 of file qarraydata.cpp.

qCalculateGrowingBlockSize()

CalculateGrowingBlockSizeResult Q_CORE_EXPORT Q_DECL_CONST_FUNCTION qCalculateGrowingBlockSize ( qsizetype elementCount, qsizetype elementSize, qsizetype headerSize )

noexcept

Since

5.7

Returns the memory block size and the number of elements that will fit in that block for a container containing elementCount elements, each of elementSize bytes, plus a header of headerSize bytes. This function assumes the container will grow and pre-allocates a growth factor.

Both elementCount and headerSize can be zero, but elementSize cannot.

This function returns -1 on overflow or if the memory block size would not fit a qsizetype.

Note

The memory block may contain up to elementSize - 1 bytes more than needed.

Definition at line 87 of file qarraydata.cpp.

qt_reallocarray()

void * qt_reallocarray ( void * p, size_t n, size_t s )

inline

Definition at line 110 of file qtools_p.h.