[pypy-svn] r43757 - in pypy/branch/kill-ctypes/pypy/rpython/lltypesystem: . test

[fijal at codespeak.net]

Author: fijal
Date: Sun May 27 23:29:53 2007
New Revision: 43757

Added:
   pypy/branch/kill-ctypes/pypy/rpython/lltypesystem/rfficache.py
   pypy/branch/kill-ctypes/pypy/rpython/lltypesystem/test/test_rfficache.py
Log:
Add a sizeof gcc invoker


Added: pypy/branch/kill-ctypes/pypy/rpython/lltypesystem/rfficache.py
==============================================================================
--- (empty file)
+++ pypy/branch/kill-ctypes/pypy/rpython/lltypesystem/rfficache.py	Sun May 27 23:29:53 2007
@@ -0,0 +1,31 @@
+
+""" This file creates and maintains _cache/rtypes.py, which
+keeps information about C type sizes on various platforms
+"""
+
+import py
+from pypy.translator.tool.cbuild import build_executable
+from subprocess import PIPE, Popen
+from pypy.tool.udir import udir
+
+def sizeof_c_type(c_typename, includes={}):
+    includes['stdio.h'] = True
+    include_string = "\n".join(["#include <%s>" % i for i in includes.keys()])
+    c_source = py.code.Source('''
+    // includes
+    %s
+
+    // checking code
+    int main(void)
+    {
+       printf("%%d\\n", sizeof(%s));
+       return (0);
+    }
+    ''' % (include_string, c_typename))
+    c_file = udir.join("typetest.c")
+    c_file.write(c_source)
+
+    c_exec = build_executable([str(c_file)])
+    pipe = Popen(c_exec, stdout=PIPE)
+    pipe.wait()
+    return int(pipe.stdout.read()) * 8

Added: pypy/branch/kill-ctypes/pypy/rpython/lltypesystem/test/test_rfficache.py
==============================================================================
--- (empty file)
+++ pypy/branch/kill-ctypes/pypy/rpython/lltypesystem/test/test_rfficache.py	Sun May 27 23:29:53 2007
@@ -0,0 +1,6 @@
+
+from pypy.rpython.lltypesystem.rfficache import sizeof_c_type
+
+def test_sizeof_c_type():
+    sizeofchar = sizeof_c_type('char')
+    assert sizeofchar == 8