<QtEndian> 头提供在数字的小端、大端表示之间转换的函数。 更多...
头: | #include <QtEndian> |
qint16_be | |
qint16_le | |
qint32_be | |
qint32_le | |
qint64_be | |
qint64_le | |
quint16_be | |
quint16_le | |
quint32_be | |
quint32_le | |
quint64_be | |
quint64_le |
T | qFromBigEndian (const void * src ) |
T | qFromBigEndian (T src ) |
void | qFromBigEndian (const void * src , qsizetype count , void * dest ) |
T | qFromLittleEndian (const void * src ) |
T | qFromLittleEndian (T src ) |
void | qFromLittleEndian (const void * src , qsizetype count , void * dest ) |
void | qToBigEndian (T src , void * dest ) |
T | qToBigEndian (T src ) |
void | qToBigEndian (const void * src , qsizetype count , void * dest ) |
void | qToLittleEndian (T src , void * dest ) |
T | qToLittleEndian (T src ) |
void | qToLittleEndian (const void * src , qsizetype count , void * dest ) |
typedef 对于 QBEInteger <qint16>。在所有 Qt 支持平台,保证将此类型按 16 位大端在前有符号整数存储在内存中。
另请参阅 qint16 .
typedef 对于 QLEInteger <qint16>. This type is guaranteed to be stored in memory as a 16-bit little-endian signed integer on all platforms supported by Qt.
另请参阅 qint16 .
typedef 对于 QBEInteger <qint32>. This type is guaranteed to be stored in memory as a 32-bit big-endian signed integer on all platforms supported by Qt.
另请参阅 qint32 .
typedef 对于 QLEInteger <qint32>. This type is guaranteed to be stored in memory as a 32-bit little-endian signed integer on all platforms supported by Qt.
另请参阅 qint32 .
typedef 对于 QBEInteger <qint64>. This type is guaranteed to be stored in memory as a 64-bit big-endian signed integer on all platforms supported by Qt.
另请参阅 qint64 .
typedef 对于 QLEInteger <qint64>. This type is guaranteed to be stored in memory as a 64-bit little-endian signed integer on all platforms supported by Qt.
另请参阅 qint64 .
typedef 对于 QBEInteger <quint16>. This type is guaranteed to be stored in memory as a 16-bit big-endian unsigned integer on all platforms supported by Qt.
另请参阅 quint16 .
typedef 对于 QLEInteger <quint16>. This type is guaranteed to be stored in memory as a 16-bit little-endian unsigned integer on all platforms supported by Qt.
另请参阅 quint16 .
typedef 对于 QBEInteger <quint32>. This type is guaranteed to be stored in memory as a 32-bit big-endian unsigned integer on all platforms supported by Qt.
另请参阅 quint32 .
typedef 对于 QLEInteger <quint32>. This type is guaranteed to be stored in memory as a 32-bit little-endian unsigned integer on all platforms supported by Qt.
另请参阅 quint32 .
typedef 对于 QBEInteger <quint64>. This type is guaranteed to be stored in memory as a 64-bit big-endian unsigned integer on all platforms supported by Qt.
另请参阅 quint64 .
typedef 对于 QLEInteger <quint64>. This type is guaranteed to be stored in memory as a 64-bit little-endian unsigned integer on all platforms supported by Qt.
另请参阅 quint64 .
Reads a big-endian number from memory location src and returns the number in the host byte order representation. On CPU architectures where the host byte order is little-endian (such as x86) this will swap the byte order; otherwise it will just read from src .
注意:
模板类型
T
can either be a quint16, qint16, quint32, qint32, quint64, or qint64. Other types of integers, e.g., qlong, are not applicable.
注意: 从 Qt 5.7 起,类型的 src 参数是 void 指针。
没有数据对齐约束对于 src .
另请参阅 qFromLittleEndian (), qToBigEndian (),和 qToLittleEndian ().
[constexpr]
template <typename T>
T
qFromBigEndian
(
T
src
)
这是重载函数。
转换 src from big-endian byte order and returns the number in host byte order representation of that number. On CPU architectures where the host byte order is little-endian (such as x86) this will return src with the byte order swapped; otherwise it will return src 未经修改。
读取
count
big-endian numbers from memory location
src
and stores them in the host byte order representation at
dest
. On CPU architectures where the host byte order is little-endian (such as x86) this will swap the byte order; otherwise it will just perform a
memcpy
from
src
to
dest
.
注意:
模板类型
T
can either be a quint16, qint16, quint32, qint32, quint64, or qint64. Other types of integers, e.g., qlong, are not applicable.
没有数据对齐约束对于
src
. However,
dest
is expected to be naturally aligned for type
T
.
若 src and dest can be the same pointer, this function will perform an in-place swap (if necessary). If they are not the same, the memory regions must not overlap.
另请参阅 qFromLittleEndian (), qToBigEndian (),和 qToLittleEndian ().
Reads a little-endian number from memory location src and returns the number in the host byte order representation. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will swap the byte order; otherwise it will just read from src .
注意:
模板类型
T
can either be a quint16, qint16, quint32, qint32, quint64, or qint64. Other types of integers, e.g., qlong, are not applicable.
注意: 从 Qt 5.7 起,类型的 src 参数是 void 指针。
没有数据对齐约束对于 src .
另请参阅 qFromBigEndian (), qToBigEndian (),和 qToLittleEndian ().
[constexpr]
template <typename T>
T
qFromLittleEndian
(
T
src
)
这是重载函数。
转换 src from little-endian byte order and returns the number in host byte order representation of that number. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will return src with the byte order swapped; otherwise it will return src 未经修改。
读取
count
little-endian numbers from memory location
src
and stores them in the host byte order representation at
dest
. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will swap the byte order; otherwise it will just perform a
memcpy
from
src
to
dest
.
注意:
模板类型
T
can either be a quint16, qint16, quint32, qint32, quint64, or qint64. Other types of integers, e.g., qlong, are not applicable.
没有数据对齐约束对于
src
. However,
dest
is expected to be naturally aligned for type
T
.
若 src and dest can be the same pointer, this function will perform an in-place swap (if necessary). If they are not the same, the memory regions must not overlap.
另请参阅 qToBigEndian () 和 qToLittleEndian ().
Writes the number
src
with template type
T
to the memory location at
dest
in big-endian byte order.
注意:
模板类型
T
can either be a quint16, qint16, quint32, qint32, quint64, or qint64. Other types of integers, e.g., qlong, are not applicable.
没有数据对齐约束对于 dest .
注意: 从 Qt 5.7 起,类型的 dest 参数是 void 指针。
另请参阅 qFromBigEndian (), qFromLittleEndian (),和 qToLittleEndian ().
[constexpr]
template <typename T>
T
qToBigEndian
(
T
src
)
这是重载函数。
转换 src from host byte order and returns the number in big-endian byte order representation of that number. On CPU architectures where the host byte order is little-endian (such as x86) this will return src with the byte order swapped; otherwise it will return src 未经修改。
读取
count
numbers from memory location
src
in the host byte order and stores them in big-endian representation at
dest
. On CPU architectures where the host byte order is little-endian (such as x86) this will swap the byte order; otherwise it will just perform a
memcpy
from
src
to
dest
.
注意:
模板类型
T
can either be a quint16, qint16, quint32, qint32, quint64, or qint64. Other types of integers, e.g., qlong, are not applicable.
没有数据对齐约束对于
dest
. However,
src
is expected to be naturally aligned for type
T
.
若 src and dest can be the same pointer, this function will perform an in-place swap (if necessary). If they are not the same, the memory regions must not overlap.
另请参阅 qFromLittleEndian (), qToBigEndian (),和 qToLittleEndian ().
Writes the number
src
with template type
T
to the memory location at
dest
in little-endian byte order.
注意:
模板类型
T
can either be a quint16, qint16, quint32, qint32, quint64, or qint64. Other types of integers, e.g., qlong, are not applicable.
没有数据对齐约束对于 dest .
注意: 从 Qt 5.7 起,类型的 dest 参数是 void 指针。
另请参阅 qFromBigEndian (), qFromLittleEndian (),和 qToBigEndian ().
[constexpr]
template <typename T>
T
qToLittleEndian
(
T
src
)
这是重载函数。
转换 src from host byte order and returns the number in little-endian byte order representation of that number. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will return src with the byte order swapped; otherwise it will return src 未经修改。
读取
count
numbers from memory location
src
in the host byte order and stores them in little-endian representation at
dest
. On CPU architectures where the host byte order is big-endian (such as PowerPC) this will swap the byte order; otherwise it will just perform a
memcpy
from
src
to
dest
.
注意:
模板类型
T
can either be a quint16, qint16, quint32, qint32, quint64, or qint64. Other types of integers, e.g., qlong, are not applicable.
没有数据对齐约束对于
dest
. However,
src
is expected to be naturally aligned for type
T
.
若 src and dest can be the same pointer, this function will perform an in-place swap (if necessary). If they are not the same, the memory regions must not overlap.
另请参阅 qFromLittleEndian (), qToBigEndian (),和 qToLittleEndian ().