58 lines
1.5 KiB
Python
58 lines
1.5 KiB
Python
import t, c
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from stdint import *
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class Buf:
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data: t.CChar | t.CPtr
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length: t.CSizeT
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capacity: t.CSizeT
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owned: bool
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def __init__(self, data: t.CChar | t.CPtr, capacity: t.CSizeT, length: t.CSizeT = 0, owned: bool = False):
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self.data = data
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self.capacity = capacity
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self.length = length
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self.owned = owned
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def clear(self):
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self.length = 0
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if self.data != None and self.capacity > 0:
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self.data[0] = 0
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def write(self, src: t.CChar | t.CPtr, count: t.CSizeT) -> t.CSizeT:
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if self.data == None: return 0
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if src == None: return 0
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if count == 0: return 0
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avail: t.CSizeT = self.capacity - self.length
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if avail <= 0: return 0
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n: t.CSizeT = count if count < avail else avail
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i: t.CSizeT = 0
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while i < n:
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self.data[self.length + i] = src[i]
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i += 1
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self.length += n
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self.data[self.length] = 0
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return n
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def cstr(self) -> t.CChar | t.CPtr:
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return self.data
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def reset(self):
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self.length = 0
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if self.data != None and self.capacity > 0:
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self.data[0] = 0
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def __enter__(self) -> 'Buf' | t.CPtr:
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return self
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def __exit__(self):
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self.reset()
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def free(self):
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if self.owned and self.data != None:
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self.data[0] = 0
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self.owned = False
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self.data = None
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self.length = 0
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self.capacity = 0
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