/* Internal header for parsing printf format strings.

   Copyright (C) 1995-2018 Free Software Foundation, Inc.

   This file is part of th 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 <printf.h>

#include <stdint.h>

#include <stddef.h>

#include <string.h>

#include <wchar.h>

struct printf_spec

  {

    /* Information parsed from the format spec.  */

    struct printf_info info;

    /* Pointers into the format string for the end of this format

       spec and the next (or to the end of the string if no more).  */

    const UCHAR_T *end_of_fmt, *next_fmt;

    /* Position of arguments for precision and width, or -1 if `info' has

       the constant value.  */

    int prec_arg, width_arg;

    int data_arg;		/* Position of data argument.  */

    int data_arg_type;		/* Type of first argument.  */

    /* Number of arguments consumed by this format specifier.  */

    size_t ndata_args;

    /* Size of the parameter for PA_USER type.  */

    int size;

  };

/* The various kinds off arguments that can be passed to printf.  */

union printf_arg

  {

    wchar_t pa_wchar;

    int pa_int;

    long int pa_long_int;

    long long int pa_long_long_int;

    unsigned int pa_u_int;

    unsigned long int pa_u_long_int;

    unsigned long long int pa_u_long_long_int;

    double pa_double;

    long double pa_long_double;

    const char *pa_string;

    const wchar_t *pa_wstring;

    void *pa_pointer;

    void *pa_user;

  };

#ifndef DONT_NEED_READ_INT

/* Read a simple integer from a string and update the string pointer.

   It is assumed that the first character is a digit.  */

static int

read_int (const UCHAR_T * *pstr)

{

  int retval = **pstr - L_('0');

  while (ISDIGIT (*++(*pstr)))

    if (retval >= 0)

      {

	if (INT_MAX / 10 < retval)

	  retval = -1;

	else

	  {

	    int digit = **pstr - L_('0');

	    retval *= 10;

	    if (INT_MAX - digit < retval)

	      retval = -1;

	    else

	      retval += digit;

	  }

      }

  return retval;

}

#endif

/* These are defined in reg-printf.c.  */

extern printf_arginfo_size_function **__printf_arginfo_table attribute_hidden;

extern printf_function **__printf_function_table attribute_hidden;

extern printf_va_arg_function **__printf_va_arg_table attribute_hidden;

/* Find the next spec in FORMAT, or the end of the string.  Returns

   a pointer into FORMAT, to a '%' or a '\0'.  */

__extern_always_inline const unsigned char *

__find_specmb (const unsigned char *format)

{

  return (const unsigned char *) __strchrnul ((const char *) format, '%');

}

__extern_always_inline const unsigned int *

__find_specwc (const unsigned int *format)

{

  return (const unsigned int *) __wcschrnul ((const wchar_t *) format, L'%');

}

/* FORMAT must point to a '%' at the beginning of a spec.  Fills in *SPEC

   with the parsed details.  POSN is the number of arguments already

   consumed.  At most MAXTYPES - POSN types are filled in TYPES.  Return

   the number of args consumed by this spec; *MAX_REF_ARG is updated so it

   remains the highest argument index used.  */

extern size_t __parse_one_specmb (const unsigned char *format, size_t posn,

				  struct printf_spec *spec,

				  size_t *max_ref_arg) attribute_hidden;

extern size_t __parse_one_specwc (const unsigned int *format, size_t posn,

				  struct printf_spec *spec,

				  size_t *max_ref_arg) attribute_hidden;

/* This variable is defined in reg-modifier.c.  */

struct printf_modifier_record;

extern struct printf_modifier_record **__printf_modifier_table

     attribute_hidden;

/* Handle registered modifiers.  */

extern int __handle_registered_modifier_mb (const unsigned char **format,

					    struct printf_info *info)

     attribute_hidden;

extern int __handle_registered_modifier_wc (const unsigned int **format,

					    struct printf_info *info)

     attribute_hidden;