1 """Buffers allocated on the stack.""" 2 3 4 from bgenBuffer import FixedInputBufferType, FixedOutputBufferType 5 6 7 class StackOutputBufferType(FixedOutputBufferType): 8 9 """Fixed output buffer allocated on the stack -- passed as (buffer, size). 10 11 Instantiate with the buffer size as parameter. 12 """ 13 14 def passOutput(self, name): 15 return "%s__out__, %s" % (name, self.size) 16 17 18 class VarStackOutputBufferType(StackOutputBufferType): 19 20 """Output buffer allocated on the stack -- passed as (buffer, &size). 21 22 Instantiate with the buffer size as parameter. 23 """ 24 25 def getSizeDeclarations(self, name): 26 return [] 27 28 def getAuxDeclarations(self, name): 29 return ["int %s__len__ = %s" % (name, self.size)] 30 31 def passOutput(self, name): 32 return "%s__out__, &%s__len__" % (name, name) 33 34 def mkvalueArgs(self, name): 35 return "%s__out__, (int)%s__len__" % (name, name) 36 37 38 class VarVarStackOutputBufferType(VarStackOutputBufferType): 39 40 """Output buffer allocated on the stack -- passed as (buffer, size, &size). 41 42 Instantiate with the buffer size as parameter. 43 """ 44 45 def passOutput(self, name): 46 return "%s__out__, %s__len__, &%s__len__" % (name, name, name) 47 48 49 class ReturnVarStackOutputBufferType(VarStackOutputBufferType): 50 51 """Output buffer allocated on the stack -- passed as (buffer, size) -> size. 52 53 Instantiate with the buffer size as parameter. 54 The function's return value is the size. 55 (XXX Should have a way to suppress returning it separately, too.) 56 """ 57 58 def passOutput(self, name): 59 return "%s__out__, %s__len__" % (name, name) 60 61 def mkvalueArgs(self, name): 62 return "%s__out__, (int)_rv" % name 63
