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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:24:08 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:24:08 +0000 |
commit | f449f278dd3c70e479a035f50a9bb817a9b433ba (patch) | |
tree | 8ca2bfb785dda9bb4d573acdf9b42aea9cd51383 /python/libknot/__init__.py.in | |
parent | Initial commit. (diff) | |
download | knot-f449f278dd3c70e479a035f50a9bb817a9b433ba.tar.xz knot-f449f278dd3c70e479a035f50a9bb817a9b433ba.zip |
Adding upstream version 3.2.6.upstream/3.2.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | python/libknot/__init__.py.in | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/python/libknot/__init__.py.in b/python/libknot/__init__.py.in new file mode 100644 index 0000000..554cbe6 --- /dev/null +++ b/python/libknot/__init__.py.in @@ -0,0 +1,95 @@ +"""Python libknot interface.""" + +import ctypes +import sys + + +class KnotLookup(ctypes.Structure): + """Libknot lookup return structure.""" + + _fields_ = [('id', ctypes.c_int), ('name', ctypes.c_char_p)] + + +class KnotRdataDescriptor(ctypes.Structure): + """Rdata descriptor structure.""" + + _fields_ = [('block_types', ctypes.c_int * 8), ('name', ctypes.c_char_p)] + + +class Knot(object): + """Basic libknot interface.""" + + LIBKNOT = None + LIBKNOT_VERSION = "@libknot_SOVERSION@" + + RCODE_NAMES = None + + STRERROR = None + RDATA_DESC = None + + @classmethod + def __init__(cls, path: str = None) -> None: + """Loads shared libknot library. + An explicit library path can be specified. + """ + + if cls.LIBKNOT: + return + + if path is None: + version = "" + try: + version = ".%u" % int(cls.LIBKNOT_VERSION) + except Exception: + pass + + if sys.platform == "darwin": + path = "libknot%s.dylib" % version + else: + path = "libknot.so%s" % version + + cls.LIBKNOT = ctypes.cdll.LoadLibrary(path) + + cls.RCODE_NAMES = (KnotLookup * 32).in_dll(cls.LIBKNOT, "knot_rcode_names") + + cls.STRERROR = cls.LIBKNOT.knot_strerror + cls.STRERROR.restype = ctypes.c_char_p + cls.STRERROR.argtypes = [ctypes.c_int] + + cls.RDATA_DESC = cls.LIBKNOT.knot_get_rdata_descriptor + cls.RDATA_DESC.restype = ctypes.POINTER(KnotRdataDescriptor) + cls.RDATA_DESC.argtypes = [ctypes.c_ushort] + + @classmethod + def rclass_str(cls, rclass: int) -> str: + """Returns RRCLASS in text form.""" + + if (rclass == 1): + return "IN" + elif (rclass == 3): + return "CH" + elif (rclass == 254): + return "NONE" + elif (rclass == 255): + return "ANY" + else: + return "CLASS%i" % rclass + + @classmethod + def rtype_str(cls, rtype: int) -> str: + """Returns RRTYPE in text form.""" + + descr = cls.RDATA_DESC(rtype).contents.name + if descr: + return descr.decode() + else: + return "TYPE%i" % rtype + + @classmethod + def rcode_str(cls, rcode: int) -> str: + """Returns RCODE in text form.""" + + for item in cls.RCODE_NAMES: + if item.name and item.id == rcode: + return item.name.decode() + return "RCODE%i" % rcode |