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104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/* Copyright (C) 1991-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <printf.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include <sys/param.h>
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#include <printf.h>
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#include "../locale/localeinfo.h"
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#ifndef COMPILE_WPRINTF
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# define CHAR_T char
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# define UCHAR_T unsigned char
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# define INT_T int
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# define L_(Str) Str
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# define ISDIGIT(Ch) isdigit (Ch)
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# define ISASCII(Ch) isascii (Ch)
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# define MBRLEN(Cp, L, St) __mbrlen (Cp, L, St)
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# define PUT(F, S, N) _IO_sputn (F, S, N)
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# define PAD(Padchar) \
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if (width > 0) \
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done += _IO_padn (s, Padchar, width)
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#else
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# define vfprintf vfwprintf
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# define CHAR_T wchar_t
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# define UCHAR_T uwchar_t
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# define INT_T wint_t
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# define L_(Str) L##Str
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# define ISDIGIT(Ch) iswdigit (Ch)
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# define PUT(F, S, N) _IO_sputn (F, S, N)
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# define PAD(Padchar) \
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if (width > 0) \
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done += _IO_wpadn (s, Padchar, width)
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#endif
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#define DONT_NEED_READ_INT
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#include "printf-parse.h"
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size_t
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parse_printf_format (const char *fmt, size_t n, int *argtypes)
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{
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size_t nargs; /* Number of arguments. */
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size_t max_ref_arg; /* Highest index used in a positional arg. */
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struct printf_spec spec;
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const unsigned char *f = (const unsigned char *) fmt;
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nargs = 0;
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max_ref_arg = 0;
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/* Search for format specifications. */
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for (f = __find_specmb (f); *f != '\0'; f = spec.next_fmt)
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{
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/* Parse this spec. */
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nargs += __parse_one_specmb (f, nargs, &spec, &max_ref_arg);
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/* If the width is determined by an argument, it is an int. */
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if (spec.width_arg != -1 && (size_t) spec.width_arg < n)
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argtypes[spec.width_arg] = PA_INT;
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/* If the precision is determined by an argument, it is an int. */
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if (spec.prec_arg != -1 && (size_t) spec.prec_arg < n)
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argtypes[spec.prec_arg] = PA_INT;
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if ((size_t) spec.data_arg < n)
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switch (spec.ndata_args)
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{
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case 0: /* No arguments. */
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break;
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case 1: /* One argument; we already have the type. */
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argtypes[spec.data_arg] = spec.data_arg_type;
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break;
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default:
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/* We have more than one argument for this format spec. We must
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call the arginfo function again to determine all the types. */
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(void) (*__printf_arginfo_table[spec.info.spec])
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(&spec.info, n - spec.data_arg, &argtypes[spec.data_arg],
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&spec.size);
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break;
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}
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}
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return MAX (nargs, max_ref_arg);
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}
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