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glibc/stdio-common/printf-prs.c
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/* Copyright (C) 1991-2016 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 Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <stdio.h> | |
#include <printf.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <wchar.h> | |
#include <sys/param.h> | |
#include "../locale/localeinfo.h" | |
#ifndef COMPILE_WPRINTF | |
# define CHAR_T char | |
# define UCHAR_T unsigned char | |
# define INT_T int | |
# define L_(Str) Str | |
# define ISDIGIT(Ch) isdigit (Ch) | |
# define ISASCII(Ch) isascii (Ch) | |
# define MBRLEN(Cp, L, St) __mbrlen (Cp, L, St) | |
# define PUT(F, S, N) _IO_sputn (F, S, N) | |
# define PAD(Padchar) \ | |
if (width > 0) \ | |
done += _IO_padn (s, Padchar, width) | |
#else | |
# define vfprintf vfwprintf | |
# define CHAR_T wchar_t | |
# define UCHAR_T uwchar_t | |
# define INT_T wint_t | |
# define L_(Str) L##Str | |
# define ISDIGIT(Ch) iswdigit (Ch) | |
# define PUT(F, S, N) _IO_sputn (F, S, N) | |
# define PAD(Padchar) \ | |
if (width > 0) \ | |
done += _IO_wpadn (s, Padchar, width) | |
#endif | |
#define DONT_NEED_READ_INT | |
#include "printf-parse.h" | |
size_t | |
parse_printf_format (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; | |
const unsigned char *f = (const unsigned char *) fmt; | |
nargs = 0; | |
max_ref_arg = 0; | |
/* Search for format specifications. */ | |
for (f = __find_specmb (f); *f != '\0'; f = spec.next_fmt) | |
{ | |
/* Parse this spec. */ | |
nargs += __parse_one_specmb (f, nargs, &spec, &max_ref_arg); | |
/* If the width is determined by an argument this is an int. */ | |
if (spec.width_arg != -1 && (size_t) 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 && (size_t) spec.prec_arg < n) | |
argtypes[spec.prec_arg] = PA_INT; | |
if ((size_t) 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], | |
&spec.size); | |
break; | |
} | |
} | |
return MAX (nargs, max_ref_arg); | |
} |