main.py

import clang.cindex
import os, textwrap, StringIO

from clang.cindex import Config, Index, CursorKind

clib_scalanative_path = '/Users/timothyklim/Development/scala-native/clib/src/main/scala/scala/scalanative/libc'

scalatypes_map_dict = {
    "int": "CInt"
    "void": "Unit",
    "void *": "Ptr[_]",
    "char *": "CString",
    "unsigned char": "CUnsignedChar",
    "const char *": "CString",
    "char": "CChar",
    "int *": "Ptr[Int]"
}

def convert_to_scalanative(kind):
    res = scalatypes_map_dict.get(kind)
    if res is None:
        print kind
        raise "%s type not found" % kind
    else:
        return res

def look_header(path):
    node = index.parse(path).cursor
    name = os.path.basename(path).split('.')[0]
    output = StringIO.StringIO()
    header = """
        package scala.scalanative
        package libc

        import native._

        @extern object %s {
        """ % name
    output.write(textwrap.dedent(header).lstrip())

    for c in node.get_children():
        if not c.displayname.startswith("_") and c.displayname != "":
            if c.kind == CursorKind.FUNCTION_DECL:
                print([c.kind, c.spelling, c.displayname, c.type.get_result().spelling])
                def_args = []
                for a in c.get_arguments():
                    print ([a.displayname, a.type.spelling, a.type.get_result().spelling])
                    def_args.append("%s: %s" % (a.displayname.replace('_', ''), convert_to_scalanative(a.type.spelling)))
                def_name = c.spelling
                def_type = convert_to_scalanative(c.type.get_result().spelling)
                output.write("  def %s(%s): %s = extern\n" % (def_name, ', '.join(def_args), def_type))

    output.write("}\n")
    contents = output.getvalue()
    output.close()
    f = open("%s/%s.scala" % (clib_scalanative_path, name), "w")
    f.write(contents)
    f.close()
    return contents

Config.set_library_path("/usr/local/Cellar/llvm38/3.8.0/lib/llvm/lib")

index = Index.create()
include_path = '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include' # '/usr/local/Cellar/llvm38/3.8.0/lib/llvm/include/c++/v1'
# 'stdlib', 'string', 'float', 'complex'
# 'stdnoreturn', 'stdalign', 'stdarg', 'stdatomic', 'stdbool', 'threads', 'uchar'

# 'inttypes', 'iso646', 'limits', 'locale',
# 'math', 'setjmp', 'signal', 'stddef', 'stdint', 'string', 'tgmath', 'time', 'wchar', 'wctype'

for header in ['assert', 'ctype', 'errno', 'fenv']:
    print 'processing header %s:' % header
    look_header('%s/%s.h' % (include_path, header))