[Jython-checkins] SF.net SVN: jython: [4888] branches/asm/Lib

[<zy...@us...>]

Revision: 4888
          http://jython.svn.sourceforge.net/jython/?rev=4888&view=rev
Author:   zyasoft
Date:     2008-07-11 05:16:28 -0700 (Fri, 11 Jul 2008)

Log Message:
-----------
Begin port of PyPy's _rawffi, which with their pure-Python ctypes wrapper, implements ctypes

Added Paths:
-----------
    branches/asm/Lib/_rawffi.py
    branches/asm/Lib/test/test__rawffi.py

Added: branches/asm/Lib/_rawffi.py
===================================================================
--- branches/asm/Lib/_rawffi.py	                        (rev 0)
+++ branches/asm/Lib/_rawffi.py	2008-07-11 12:16:28 UTC (rev 4888)
@@ -0,0 +1,36 @@
+import com.sun.jna as jna
+
+def get_libc():
+    return CDLL("c")
+
+class Array(object):
+    def __init__(self):
+        pass
+
+class FuncPtr(object):
+    def __init__(self, fn, arg_types, ret_type):
+        self.fn = fn
+        # decode
+        self.arg_types = arg_types
+        self.ret_type = ret_type
+
+    def __call__(self, *args):
+        pass
+
+class CDLL(object):
+    def __init__(self, libname):
+        self.lib = jna.NativeLibrary.getInstance(libname)
+        self.cache = dict()
+
+    def ptr(self, name, argtypes, restype):
+        fn = self.lib.getFunction(name)
+        key = (name, tuple(argtypes), restype)
+        try:
+            return self.cache[key]
+        except KeyError:
+            fn = FuncPtr(name, argtypes, restype)
+            self.cache[key] = fn
+            return fn
+
+
+

Added: branches/asm/Lib/test/test__rawffi.py
===================================================================
--- branches/asm/Lib/test/test__rawffi.py	                        (rev 0)
+++ branches/asm/Lib/test/test__rawffi.py	2008-07-11 12:16:28 UTC (rev 4888)
@@ -0,0 +1,32 @@
+import unittest
+from test import test_support
+
+class RawFFITestCase(unittest.TestCase):
+
+    def setUp(self):
+        self.libc_name = "c"
+
+    def test_libload(self):
+        import _rawffi
+        _rawffi.CDLL(self.libc_name)
+
+    def test_libc_load(self):
+        import _rawffi
+        _rawffi.get_libc()
+
+    def test_getattr(self):
+        import _rawffi
+        libc = _rawffi.get_libc()
+        func = libc.ptr('rand', [], 'i')
+        assert libc.ptr('rand', [], 'i') is func # caching
+        assert libc.ptr('rand', [], 'l') is not func
+        assert isinstance(func, _rawffi.FuncPtr)
+        self.assertRaises(AttributeError, getattr, libc, "xxx")
+
+def test_main():
+    tests = [RawFFITestCase,
+             ]
+    test_support.run_unittest(*tests)
+
+if __name__ == '__main__':
+    test_main()


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