def make_buf(value):
buf = memoryview(bytes(value))
rv = ffi.new("RelayBuf *")
rv.data = ffi.from_buffer(buf)
rv.len = len(buf)
attached_refs[rv] = buf
return rv
def _init_valid_platforms():
global VALID_PLATFORMS
size_out = ffi.new("uintptr_t *")
strings = rustcall(lib.relay_valid_platforms, size_out)
valid_platforms = []
for i in range(int(size_out[0])):
valid_platforms.append(decode_str(strings[i], free=True))
VALID_PLATFORMS = frozenset(valid_platforms)
def encode_str(s, mutable=False):
"""Encodes a RelayStr"""
rv = ffi.new("RelayStr *")
if isinstance(s, text_type):
s = s.encode("utf-8")
if mutable:
s = bytearray(s)
rv.data = ffi.from_buffer(s)
rv.len = len(s)
# we have to hold a weak reference here to ensure our string does not
# get collected before the string is used.
attached_refs[rv] = s
return rv