def typed_read(self, TP, byte_offset):
if not is_alignment_correct(TP, byte_offset):
raise CannotRead
lldata = self._get_gc_data()
byte_offset += self._get_gc_data_extra_offset()
return llop.gc_load_indexed(TP, lldata, byte_offset,
scale_factor, base_ofs)
def str_storage_getitem(TP, s, byte_offset):
# WARNING: the 'byte_offset' is, as its name says, measured in bytes;
# however, it should be aligned for TP, otherwise on some platforms this
# code will crash!
lls = llstr(s)
base_ofs = (llmemory.offsetof(STR, 'chars') +
llmemory.itemoffsetof(STR.chars, 0))
scale_factor = llmemory.sizeof(lltype.Char)
return llop.gc_load_indexed(TP, lls, byte_offset, scale_factor, base_ofs)
def str_storage_getitem(TP, s, byte_offset):
# WARNING: the 'byte_offset' is, as its name says, measured in bytes;
# however, it should be aligned for TP, otherwise on some platforms this
# code will crash!
lls = llstr(s)
base_ofs = (llmemory.offsetof(STR, 'chars') +
llmemory.itemoffsetof(STR.chars, 0))
scale_factor = llmemory.sizeof(lltype.Char)
return llop.gc_load_indexed(TP, lls, byte_offset,
scale_factor, base_ofs)
def str_gc_load(TYPE, buf, offset):
base_ofs = (llmemory.offsetof(STR, 'chars') +
llmemory.itemoffsetof(STR.chars, 0))
scale_factor = llmemory.sizeof(lltype.Char)
lls = llstr(buf)
return llop.gc_load_indexed(TYPE, lls, offset, scale_factor, base_ofs)