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Commit d3e822d9 authored by Tobias Pape's avatar Tobias Pape Committed by Stefan Marr

make the file and string stream type-compatible

parent 17795b45
import os
from rpython.rlib.streamio import open_file_as_stream
from StringIO import StringIO
from rpython.rlib.streamio import open_file_as_stream, Stream, StreamError
from som.compiler.parser import Parser
from som.compiler.class_generation_context import ClassGenerationContext
class _StringStream(Stream):
def __init__(self, string):
self._string = string
self.pos = 0
self.max = len(string) - 1
def write(self, data):
raise StreamError("StringStream is not writable")
def truncate(self, size):
raise StreamError("StringStream is immutable")
def peek(self):
if self.pos < self.max:
return self._string[self.pos:]
return ''
def tell(self):
return self.pos
def seek(self, offset, whence):
if whence == 0:
self.pos = max(0, offset)
elif whence == 1:
self.pos = max(0, self.pos + offset)
elif whence == 2:
self.pos = max(0, self.max + offset)
raise StreamError("seek(): whence must be 0, 1 or 2")
def read(self, n):
assert isinstance(n, int)
end = self.pos + n
data = self._string[self.pos:end]
self.pos += len(data)
return data
def compile_class_from_file(path, filename, system_class, universe):
return _SourcecodeCompiler().compile(path, filename, system_class, universe)
......@@ -40,7 +76,7 @@ class _SourcecodeCompiler(object):
return result
def compile_class_string(self, stream, system_class, universe):
self._parser = Parser(StringIO(stream), universe)
self._parser = Parser(_StringStream(stream), universe)
result = self._compile(system_class, universe)
return result
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