declare c-api types in python

Author: Ivan Dlugos

objectbox/c.py

@@ -2,3 +2,122 @@
 
 # initialize the C library
 C = ctypes.CDLL(ctypes.util.find_library("objectbox"))
+
+# define some basic types
+obx_err = ctypes.c_int
+obx_schema_id = ctypes.c_uint32
+obx_uid = ctypes.c_uint64
+obx_id = ctypes.c_uint64
+obx_qb_cond = ctypes.c_int
+
+
+class OBX_model(ctypes.Structure):
+    pass
+
+
+OBX_model_p = ctypes.POINTER(OBX_model)
+
+
+class OBX_store(ctypes.Structure):
+    pass
+
+
+OBX_store_p = ctypes.POINTER(OBX_store)
+
+
+class OBX_store_options(ctypes.Structure):
+    _fields_ = [
+        ('directory', ctypes.c_char_p),
+        ('maxDbSizeInKByte', ctypes.c_uint64),
+        ('fileMode', ctypes.c_uint),
+        ('maxReaders', ctypes.c_uint)
+    ]
+
+
+OBX_store_options_p = ctypes.POINTER(OBX_store_options)
+
+
+class OBX_bytes(ctypes.Structure):
+    _fields_ = [
+        ('data', ctypes.c_void_p),
+        ('size', ctypes.c_size_t),
+    ]
+
+
+OBX_bytes_p = ctypes.POINTER(OBX_bytes)
+
+
+class OBX_bytes_array(ctypes.Structure):
+    _fields_ = [
+        ('data', ctypes.POINTER(OBX_bytes)),
+        ('count', ctypes.c_size_t),
+    ]
+
+
+OBX_bytes_array_p = ctypes.POINTER(OBX_bytes_array)
+
+
+class OBX_id_array(ctypes.Structure):
+    _fields_ = [
+        ('ids', ctypes.POINTER(obx_id)),
+        ('count', ctypes.c_size_t),
+    ]
+
+
+OBX_id_array_p = ctypes.POINTER(OBX_id_array)
+
+
+class OBX_txn(ctypes.Structure):
+    pass
+
+
+OBX_txn_p = ctypes.POINTER(OBX_txn)
+
+
+class OBX_box(ctypes.Structure):
+    pass
+
+
+OBX_box_p = ctypes.POINTER(OBX_box)
+
+
+class OBX_async(ctypes.Structure):
+    pass
+
+
+OBX_async_p = ctypes.POINTER(OBX_async)
+
+
+class OBX_query_builder(ctypes.Structure):
+    pass
+
+
+OBX_query_builder_p = ctypes.POINTER(OBX_query_builder)
+
+
+class OBX_query(ctypes.Structure):
+    pass
+
+
+OBX_query_p = ctypes.POINTER(OBX_query)
+
+
+# creates a global function "name" with the given restype & argtypes, calling C function with the same name
+def fn(name: str, restype: type, argtypes):
+    func = C.__getattr__(name)
+
+    if restype == obx_err:
+        # TODO func.errcheck
+        pass
+    else:
+        func.restype = restype
+
+    func.argtypes = argtypes
+    return func
+
+
+# OBX_model* obx_model_create(void);
+obx_model_create = fn('obx_model_create', OBX_model_p, [])
+
+# obx_err obx_model_entity(OBX_model* model, const char* name, obx_schema_id entity_id, obx_uid entity_uid);
+obx_model_entity = fn('obx_model_entity', obx_err, [OBX_model_p, ctypes.c_char_p, obx_schema_id, obx_uid])