'Interpret a format string, reading the data at `addr` in `region` into `args` starting at `startpos`.'

def interpret(self, addr, startpos, args, region=None):

    format_specifier_count = len(filter((lambda x: isinstance(x, FormatSpecifier)), self.components))
    if (format_specifier_count > 1):
        l.warning("We    don't    support    more    than    one    format    specifiers    in    format    strings.")
    if (region is None):
        region = self.parser.state.memory
    bits = self.parser.state.arch.bits
    failed = self.parser.state.se.BVV(0, bits)
    argpos = startpos
    position = addr
    for component in self.components:
        if isinstance(component, str):
            pass
        else:
            fmt_spec = component
            try:
                dest = args(argpos)
            except SimProcedureArgumentError:
                dest = None
            if (fmt_spec.spec_type == 's'):
                max_str_len = self.parser.state.libc.max_str_len
                max_sym_bytes = self.parser.state.libc.buf_symbolic_bytes
                if (fmt_spec.length_spec is not None):
                    max_str_len = fmt_spec.length_spec
                    max_sym_bytes = fmt_spec.length_spec
                (ohr, ohc, ohi) = region.find(position, self.parser.state.se.BVV('\n'), max_str_len, max_symbolic_bytes=max_sym_bytes)
                mm = self.parser.state.se.If((ohr == 0), (position + max_str_len), ohr)
                length = self.parser.state.se.max_int((mm - position))
                src_str = region.load(position, length)
                for delimiter in (set(FormatString.SCANF_DELIMITERS) - {'\x00'}):
                    delim_bvv = self.parser.state.se.BVV(delimiter)
                    for i in range(length):
                        self.parser.state.add_constraints((region.load((position + i), 1) != delim_bvv))
                self.parser.state.memory.store(dest, src_str)
                self.parser.state.memory.store((dest + length), self.parser.state.se.BVV(0, 8))
                position += length
            else:
                if (fmt_spec.spec_type in ['d', 'u', 'x']):
                    base = (16 if (fmt_spec.spec_type == 'x') else 10)
                    (status, i, num_bytes) = self.parser._sim_atoi_inner(position, region, base=base, read_length=fmt_spec.length_spec)
                    failed = self.parser.state.se.If(status, failed, (failed + 1))
                    position += num_bytes
                elif (fmt_spec.spec_type == 'c'):
                    i = region.load(position, 1)
                    i = i.zero_extend((bits - 8))
                    position += 1
                else:
                    raise SimProcedureError(("unsupported    format    spec    '%s'    in    interpret" % fmt_spec.spec_type))
                i = self.parser.state.se.Extract(((fmt_spec.size * 8) - 1), 0, i)
                self.parser.state.memory.store(dest, i, size=fmt_spec.size, endness=self.parser.state.arch.memory_endness)
            argpos += 1
    return (position, ((argpos - startpos) - failed))
