| /* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If |
| not, write to the Free Software Foundation, Inc., 675 Mass Ave, |
| Cambridge, MA 02139, USA. */ |
| |
| #include <stdio.h> |
| #include <printf.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "printf-parse.h" |
| |
| |
| size_t |
| parse_printf_format (fmt, n, argtypes) |
| const char *fmt; |
| size_t n; |
| int *argtypes; |
| { |
| size_t nargs; /* Number of arguments. */ |
| size_t max_ref_arg; /* Highest index used in a positional arg. */ |
| struct printf_spec spec; |
| |
| nargs = 0; |
| max_ref_arg = 0; |
| |
| /* Search for format specifications. */ |
| for (fmt = find_spec (fmt); *fmt != '\0'; fmt = spec.next_fmt) |
| { |
| /* Parse this spec. */ |
| nargs += parse_one_spec (fmt, nargs, &spec, &max_ref_arg); |
| |
| /* If the width is determined by an argument this is an int. */ |
| if (spec.width_arg != -1 && spec.width_arg < n) |
| argtypes[spec.width_arg] = PA_INT; |
| |
| /* If the precision is determined by an argument this is an int. */ |
| if (spec.prec_arg != -1 && spec.prec_arg < n) |
| argtypes[spec.prec_arg] = PA_INT; |
| |
| if (spec.data_arg < n) |
| switch (spec.ndata_args) |
| { |
| case 0: /* No arguments. */ |
| break; |
| case 1: /* One argument; we already have the type. */ |
| argtypes[spec.data_arg] = spec.data_arg_type; |
| break; |
| default: |
| /* We have more than one argument for this format spec. We must |
| call the arginfo function again to determine all the types. */ |
| (void) (*__printf_arginfo_table[spec.info.spec]) |
| (&spec.info, n - spec.data_arg, &argtypes[spec.data_arg]); |
| break; |
| } |
| } |
| |
| return MAX (nargs, max_ref_arg); |
| } |