Method __repl

qiling/os/utils.py:180–234

Convert printf format string tokens into Python's.

(m: re.Match)

        }

        def __repl(m: re.Match) -> str:
            """Convert printf format string tokens into Python's.
            """

            if m['follows'] == '%':
                return '%%'

            else:
                flags = m['flags'] or ''

                fill  = ' ' if ' ' in flags else ''
                align = '<' if '-' in flags else ''
                sign  = '+' if '+' in flags else ''
                pound = '#' if '#' in flags else ''
                zeros = '0' if '0' in flags else ''

                width = m['width'] or ''

                if width == '*':
                    width = f'{next(va_list)}'

                prec = m['precision'] or ''

                if prec == '*':
                    prec = f'{next(va_list)}'

                if prec:
                    prec = f'.{prec}'

                typ = m['type']
                arg = next(va_list)

                if typ == 's':
                    typ = 's'
                    arg = read_str[wstring](arg)

                elif typ == 'S':
                    typ = 's'
                    arg = read_str[not wstring](arg)

                elif typ == 'Z':
                    # note: ANSI_STRING and UNICODE_STRING have identical layout
                    ucstr_struct = make_unicode_string(self.ql.arch.bits)

                    with ucstr_struct.ref(self.ql.mem, arg) as ucstr_obj:
                        typ = 's'
                        arg = read_str[wstring](ucstr_obj.Buffer)

                elif typ == 'p':
                    pound = '#'
                    typ = 'x'

                repl_args.append(arg)

                return f'%{fill}{align}{sign}{pound}{zeros}{width}{prec}{typ}'

        out = fmtstr.sub(__repl, format)