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50 lines
1.8 KiB
Python
50 lines
1.8 KiB
Python
'''
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Copyright (c) 2024 Pyogenics <https://github.com/Pyogenics>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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'''
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from struct import unpack, calcsize
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def unpackStream(format, stream):
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size = calcsize(format)
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data = stream.read(size)
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return unpack(format, data)
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def readNullTerminatedString(stream):
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string = b""
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char = stream.read(1)
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while char != b"\x00":
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string += char
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char = stream.read(1)
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return string.decode("utf8", errors="ignore")
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def calculatePadding(length):
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# (it basically works with rounding)
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paddingSize = (((length + 3) // 4) * 4) - length
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return paddingSize
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def readLengthPrefixedString(stream):
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length, = unpackStream("<I", stream)
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string = stream.read(length)
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paddingSize = calculatePadding(length)
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stream.read(paddingSize)
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return string.decode("utf8", errors="ignore") |