cpython/Mac/Modules/cf/cfscan.py

# Scan an Apple header file, generating a Python file of generator calls.

import sys
from bgenlocations import TOOLBOXDIR, BGENDIR
sys.path.append(BGENDIR)
from scantools import Scanner_OSX

LONG = "CoreFoundation"
SHORT = "cf"
OBJECTS = ("CFTypeRef",
                "CFArrayRef", "CFMutableArrayRef",
                "CFDataRef", "CFMutableDataRef",
                "CFDictionaryRef", "CFMutableDictionaryRef",
                "CFStringRef", "CFMutableStringRef",
                "CFURLRef",
##              "CFPropertyListRef",
                )
# ADD object typenames here

def main():
    input = [
            "CFBase.h",
            "CFArray.h",
##              "CFBag.h",
##              "CFBundle.h",
##              "CFCharacterSet.h",
            "CFData.h",
##              "CFDate.h",
            "CFDictionary.h",
##              "CFNumber.h",
##              "CFPlugIn.h",
            "CFPreferences.h",
            "CFPropertyList.h",
##              "CFSet.h",
            "CFString.h",
##              "CFStringEncodingExt.h",
##              "CFTimeZone.h",
            "CFURL.h",
            ]
    output = SHORT + "gen.py"
    defsoutput = TOOLBOXDIR + LONG + ".py"
    scanner = MyScanner(input, output, defsoutput)
    scanner.scan()
    scanner.gentypetest(SHORT+"typetest.py")
    scanner.close()
    print("=== Testing definitions output code ===")
    exec(open(defsoutput).read(), {}, {})
    print("=== Done scanning and generating, now importing the generated code... ===")
    exec "import " + SHORT + "support"
    print("=== Done.  It's up to you to compile it now! ===")

class MyScanner(Scanner_OSX):

    def destination(self, type, name, arglist):
        classname = "Function"
        listname = "functions"
        if arglist and name[:13] != 'CFPreferences':
            t, n, m = arglist[0]
            if t in OBJECTS and m == "InMode":
                classname = "Method"
                listname = t + "_methods"
            # Special case for the silly first AllocatorRef argument
            if t == 'CFAllocatorRef' and m == 'InMode' and len(arglist) > 1:
                t, n, m = arglist[1]
                if t in OBJECTS and m == "InMode":
                    classname = "MethodSkipArg1"
                    listname = t + "_methods"
        return classname, listname

    def writeinitialdefs(self):
        self.defsfile.write("def FOUR_CHAR_CODE(x): return x\n")

    def makeblacklistnames(self):
        return [
                # Memory allocator functions
                "CFAllocatorGetDefault",
                "CFAllocatorSetDefault",
                "CFAllocatorAllocate",
                "CFAllocatorReallocate",
                "CFAllocatorDeallocate",
                "CFGetAllocator",
                # Array functions we skip for now.
                "CFArrayGetValueAtIndex",
                # Data pointer functions. Skip for now.
                "CFDataGetBytePtr",
                "CFDataGetMutableBytePtr",
                "CFDataGetBytes",   # XXXX Should support this one
                # String functions
                "CFStringGetPascalString", # Use the C-string methods.
                "CFStringGetPascalStringPtr", # TBD automatically
                "CFStringGetCStringPtr",
                "CFStringGetCharactersPtr",
                "CFStringGetCString",
                "CFStringGetCharacters",
                "CFURLCreateStringWithFileSystemPath", # Gone in later releases
                "CFStringCreateMutableWithExternalCharactersNoCopy", # Not a clue...
                "CFStringSetExternalCharactersNoCopy",
                "CFStringGetCharacterAtIndex", # No format for single unichars yet.
                "kCFStringEncodingInvalidId", # incompatible constant declaration
                "CFPropertyListCreateFromXMLData", # Manually generated
                ]

    def makegreylist(self):
        return []

    def makeblacklisttypes(self):
        return [
                "CFComparatorFunction", # Callback function pointer
                "CFAllocatorContext", # Not interested in providing our own allocator
                "void_ptr_ptr",  # Tricky. This is the initializer for arrays...
                "void_ptr", # Ditto for various array lookup methods
                "CFArrayApplierFunction", # Callback function pointer
                "CFDictionaryApplierFunction", # Callback function pointer
                "va_list", # For printf-to-a-cfstring. Use Python.
                "const_CFStringEncoding_ptr", # To be done, I guess
                ]

    def makerepairinstructions(self):
        return [
                # Buffers in CF seem to be passed as UInt8 * normally.
                ([("UInt8_ptr", "*", "InMode"), ("CFIndex", "*", "InMode")],
                 [("UcharInBuffer", "*", "*")]),

                ([("UniChar_ptr", "*", "InMode"), ("CFIndex", "*", "InMode")],
                 [("UnicodeInBuffer", "*", "*")]),

                # Some functions return a const char *. Don't worry, we won't modify it.
                ([("const_char_ptr", "*", "ReturnMode")],
                 [("return_stringptr", "*", "*")]),

                # base URLs are optional (pass None for NULL)
                ([("CFURLRef", "baseURL", "InMode")],
                 [("OptionalCFURLRef", "*", "*")]),

                # We handle CFPropertyListRef objects as plain CFTypeRef
                ([("CFPropertyListRef", "*", "*")],
                 [("CFTypeRef", "*", "*")]),
                ]

if __name__ == "__main__":
    main()