QByteArrayMatcher ¶

概要 ¶

详细描述 ¶

This class is useful when you have a sequence of bytes that you want to repeatedly match against some byte arrays (perhaps in a loop), or when you want to search for the same sequence of bytes multiple times in the same byte array. Using a matcher object and indexIn() is faster than matching a plain QByteArray with indexOf() if repeated matching takes place. This class offers no benefit if you are doing one-off byte array matches.

Create the QByteArrayMatcher 采用 QByteArray you want to search for. Then call indexIn() 在 QByteArray that you want to search.

另请参阅

QByteArray QStringMatcher

class QByteArrayMatcher ¶

QByteArrayMatcher(pattern)

QByteArrayMatcher(other)

QByteArrayMatcher(pattern, length)

param pattern

QByteArray

param other

QByteArrayMatcher

param length

int

Constructs an empty byte array matcher that won’t match anything. Call setPattern() to give it a pattern to match.

Constructs a byte array matcher from pattern . pattern has the given length . pattern must remain in scope, but the destructor does not delete pattern .

PySide2.QtCore.QByteArrayMatcher. indexIn ( ba [ , from=0 ] ) ¶

参数

• ba – QByteArray

• from – int

返回类型

int

Searches the byte array ba , from byte position from (default 0, i.e. from the first byte), for the byte array pattern() that was set in the constructor or in the most recent call to setPattern() . Returns the position where the pattern() matched in ba , or -1 if no match was found.

PySide2.QtCore.QByteArrayMatcher. indexIn ( str , len [ , from=0 ] ) ¶

参数

• str – str

• len – int

• from – int

返回类型

int

Searches the char string str , which has length len , from byte position from (default 0, i.e. from the first byte), for the byte array pattern() that was set in the constructor or in the most recent call to setPattern() . Returns the position where the pattern() matched in str , or -1 if no match was found.

PySide2.QtCore.QByteArrayMatcher. pattern ( ) ¶

返回类型

QByteArray

Returns the byte array pattern that this byte array matcher will search for.

另请参阅

setPattern()

PySide2.QtCore.QByteArrayMatcher. setPattern ( pattern ) ¶

参数

pattern – QByteArray

Sets the byte array that this byte array matcher will search for to pattern .

另请参阅

pattern() indexIn()