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# Buffers allocated on the heap
from bgenOutput import *
from bgenType import OutputOnlyMixIn
from bgenBuffer import FixedInputOutputBufferType
class HeapInputOutputBufferType(FixedInputOutputBufferType):
"""Input-output buffer allocated on the heap -- passed as (inbuffer, outbuffer, size).
Instantiate without parameters.
Call from Python with input buffer.
"""
def __init__(self, datatype = 'char', sizetype = 'int', sizeformat = None):
FixedInputOutputBufferType.__init__(self, "0", datatype, sizetype, sizeformat)
def getOutputBufferDeclarations(self, name, constmode=False, outmode=False):
if constmode:
raise RuntimeError("Cannot use const output buffer")
if outmode:
out = "*"
else:
out = ""
return ["%s%s *%s__out__" % (self.datatype, out, name)]
def getargsCheck(self, name):
Output("if ((%s__out__ = malloc(%s__in_len__)) == NULL)", name, name)
OutLbrace()
Output('PyErr_NoMemory();')
Output("goto %s__error__;", name)
self.label_needed = 1
OutRbrace()
Output("%s__len__ = %s__in_len__;", name, name)
def passOutput(self, name):
return "%s__in__, %s__out__, (%s)%s__len__" % \
(name, name, self.sizetype, name)
def mkvalueArgs(self, name):
return "%s__out__, (int)%s__len__" % (name, name)
def cleanup(self, name):
Output("free(%s__out__);", name)
FixedInputOutputBufferType.cleanup(self, name)
class VarHeapInputOutputBufferType(HeapInputOutputBufferType):
"""same as base class, but passed as (inbuffer, outbuffer, &size)"""
def passOutput(self, name):
return "%s__in__, %s__out__, &%s__len__" % (name, name, name)
class HeapCombinedInputOutputBufferType(HeapInputOutputBufferType):
"""same as base class, but passed as (inoutbuffer, size)"""
def passOutput(self, name):
return "(%s *)memcpy(%s__out__, %s__in__, %s__len__)" % \
(self.datatype, name, name, name)
class VarHeapCombinedInputOutputBufferType(HeapInputOutputBufferType):
"""same as base class, but passed as (inoutbuffer, &size)"""
def passOutput(self, name):
return "(%s *)memcpy(%s__out__, %s__in__, &%s__len__)" % \
(self.datatype, name, name, name)
class HeapOutputBufferType(OutputOnlyMixIn, HeapInputOutputBufferType):
"""Output buffer allocated on the heap -- passed as (buffer, size).
Instantiate without parameters.
Call from Python with buffer size.
"""
def getInputBufferDeclarations(self, name, constmode=False):
return []
def getargsFormat(self):
return "i"
def getargsArgs(self, name):
return "&%s__in_len__" % name
def passOutput(self, name):
return "%s__out__, %s__len__" % (name, name)
class VarHeapOutputBufferType(HeapOutputBufferType):
"""Output buffer allocated on the heap -- passed as (buffer, &size).
Instantiate without parameters.
Call from Python with buffer size.
"""
def passOutput(self, name):
return "%s__out__, &%s__len__" % (name, name)
class VarVarHeapOutputBufferType(VarHeapOutputBufferType):
"""Output buffer allocated on the heap -- passed as (buffer, size, &size).
Instantiate without parameters.
Call from Python with buffer size.
"""
def passOutput(self, name):
return "%s__out__, %s__len__, &%s__len__" % (name, name, name)
class MallocHeapOutputBufferType(HeapOutputBufferType):
"""Output buffer allocated by the called function -- passed as (&buffer, &size).
Instantiate without parameters.
Call from Python without parameters.
"""
def getargsCheck(self, name):
Output("%s__out__ = NULL;", name)
def getAuxDeclarations(self, name):
return []
def passOutput(self, name):
return "&%s__out__, &%s__len__" % (name, name)
def getargsFormat(self):
return ""
def getargsArgs(self, name):
return None
def mkvalueFormat(self):
return "z#"
def cleanup(self, name):
Output("if( %s__out__ ) free(%s__out__);", name, name)
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