Restore 0.1.5 version from stash

wolai-backend/.venv312/Lib/site-packages/pgvector/psycopg/halfvec.py

@@ -0,0 +1,53 @@
+from psycopg.adapt import Loader, Dumper
+from psycopg.pq import Format
+from ..utils import HalfVector
+
+
+class HalfVectorDumper(Dumper):
+
+    format = Format.TEXT
+
+    def dump(self, obj):
+        return HalfVector._to_db(obj).encode('utf8')
+
+
+class HalfVectorBinaryDumper(HalfVectorDumper):
+
+    format = Format.BINARY
+
+    def dump(self, obj):
+        return HalfVector._to_db_binary(obj)
+
+
+class HalfVectorLoader(Loader):
+
+    format = Format.TEXT
+
+    def load(self, data):
+        if isinstance(data, memoryview):
+            data = bytes(data)
+        return HalfVector._from_db(data.decode('utf8'))
+
+
+class HalfVectorBinaryLoader(HalfVectorLoader):
+
+    format = Format.BINARY
+
+    def load(self, data):
+        if isinstance(data, memoryview):
+            data = bytes(data)
+        return HalfVector._from_db_binary(data)
+
+
+def register_halfvec_info(context, info):
+    info.register(context)
+
+    # add oid to anonymous class for set_types
+    text_dumper = type('', (HalfVectorDumper,), {'oid': info.oid})
+    binary_dumper = type('', (HalfVectorBinaryDumper,), {'oid': info.oid})
+
+    adapters = context.adapters
+    adapters.register_dumper(HalfVector, text_dumper)
+    adapters.register_dumper(HalfVector, binary_dumper)
+    adapters.register_loader(info.oid, HalfVectorLoader)
+    adapters.register_loader(info.oid, HalfVectorBinaryLoader)