Major fixes and new features

venv/lib/python3.12/site-packages/asyncpg/pgproto/frb.pxd

@@ -0,0 +1,48 @@
+# Copyright (C) 2016-present the asyncpg authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of asyncpg and is released under
+# the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
+
+
+cdef:
+
+    struct FRBuffer:
+        const char* buf
+        ssize_t len
+
+    inline ssize_t frb_get_len(FRBuffer *frb):
+        return frb.len
+
+    inline void frb_set_len(FRBuffer *frb, ssize_t new_len):
+        frb.len = new_len
+
+    inline void frb_init(FRBuffer *frb, const char *buf, ssize_t len):
+        frb.buf = buf
+        frb.len = len
+
+    inline const char* frb_read(FRBuffer *frb, ssize_t n) except NULL:
+        cdef const char *result
+
+        frb_check(frb, n)
+
+        result = frb.buf
+        frb.buf += n
+        frb.len -= n
+
+        return result
+
+    inline const char* frb_read_all(FRBuffer *frb):
+        cdef const char *result
+        result = frb.buf
+        frb.buf += frb.len
+        frb.len = 0
+        return result
+
+    inline FRBuffer *frb_slice_from(FRBuffer *frb,
+                                    FRBuffer* source, ssize_t len):
+        frb.buf = frb_read(source, len)
+        frb.len = len
+        return frb
+
+    object frb_check(FRBuffer *frb, ssize_t n)