def __new__(cls, pattern):
"""
If the pattern is completely static (no wildcards are present) a
L{BytePattern} is created instead. That's because searching for a
fixed byte pattern is faster than searching for a regular expression.
"""
if '?' not in pattern:
return BytePattern(HexInput.hexadecimal(pattern))
return object.__new__(cls, pattern)
def __new__(cls, pattern):
"""
If the pattern is completely static (no wildcards are present) a
L{BytePattern} is created instead. That's because searching for a
fixed byte pattern is faster than searching for a regular expression.
"""
if '?' not in pattern:
return BytePattern( HexInput.hexadecimal(pattern) )
return object.__new__(cls, pattern)
def __init__(self, hexa):
"""
Hex patterns must be in this form::
"68 65 6c 6c 6f 20 77 6f 72 6c 64" # "hello world"
Spaces are optional. Capitalization of hex digits doesn't matter.
This is exactly equivalent to the previous example::
"68656C6C6F20776F726C64" # "hello world"
Wildcards are allowed, in the form of a C{?} sign in any hex digit::
"5? 5? c3" # pop register / pop register / ret
"b8 ?? ?? ?? ??" # mov eax, immediate value
@type hexa: str
@param hexa: Pattern to search for.
"""
maxLength = len([x
for x in hexa if x in "?0123456789ABCDEFabcdef"]) / 2
super(HexPattern, self).__init__(HexInput.pattern(hexa),
maxLength=maxLength)
def __init__(self, hexa):
"""
Hex patterns must be in this form::
"68 65 6c 6c 6f 20 77 6f 72 6c 64" # "hello world"
Spaces are optional. Capitalization of hex digits doesn't matter.
This is exactly equivalent to the previous example::
"68656C6C6F20776F726C64" # "hello world"
Wildcards are allowed, in the form of a C{?} sign in any hex digit::
"5? 5? c3" # pop register / pop register / ret
"b8 ?? ?? ?? ??" # mov eax, immediate value
@type hexa: str
@param hexa: Pattern to search for.
"""
maxLength = len([x for x in hexa
if x in "?0123456789ABCDEFabcdef"]) / 2
super(HexPattern, self).__init__(HexInput.pattern(hexa),
maxLength = maxLength)
