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/* Internal function for converting integers to ASCII.
Copyright (C) 1994-2022 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
<https://www.gnu.org/licenses/>. */
#ifndef _ITOA_H
#define _ITOA_H
#include <limits.h>
/* When long long is different from long, by default, _itoa_word is
provided to convert long to ASCII and _itoa is provided to convert
long long. A sysdeps _itoa.h can define _ITOA_NEEDED to 0 and define
_ITOA_WORD_TYPE to unsigned long long int to override it so that
_itoa_word is changed to convert long long to ASCII and _itoa is
mapped to _itoa_word. */
#ifndef _ITOA_NEEDED
# define _ITOA_NEEDED (LONG_MAX != LLONG_MAX)
#endif
#ifndef _ITOA_WORD_TYPE
# define _ITOA_WORD_TYPE unsigned long int
#endif
/* Convert VALUE into ASCII in base BASE (2..36).
Write backwards starting the character just before BUFLIM.
Return the address of the first (left-to-right) character in the number.
Use upper case letters iff UPPER_CASE is nonzero. */
extern char *_itoa (unsigned long long int value, char *buflim,
unsigned int base, int upper_case) attribute_hidden;
extern const char _itoa_upper_digits[];
extern const char _itoa_lower_digits[];
#if IS_IN (libc) || IS_IN (rtld)
hidden_proto (_itoa_upper_digits)
hidden_proto (_itoa_lower_digits)
#endif
#if IS_IN (libc)
extern char *_itoa_word (_ITOA_WORD_TYPE value, char *buflim,
unsigned int base,
int upper_case) attribute_hidden;
#else
static inline char * __attribute__ ((unused, always_inline))
_itoa_word (_ITOA_WORD_TYPE value, char *buflim,
unsigned int base, int upper_case)
{
const char *digits = (upper_case
? _itoa_upper_digits
: _itoa_lower_digits);
switch (base)
{
# define SPECIAL(Base) \
case Base: \
do \
*--buflim = digits[value % Base]; \
while ((value /= Base) != 0); \
break
SPECIAL (10);
SPECIAL (16);
SPECIAL (8);
default:
do
*--buflim = digits[value % base];
while ((value /= base) != 0);
}
return buflim;
}
# undef SPECIAL
#endif
/* Similar to the _itoa functions, but output starts at buf and pointer
after the last written character is returned. */
extern char *_fitoa_word (_ITOA_WORD_TYPE value, char *buf,
unsigned int base,
int upper_case) attribute_hidden;
extern char *_fitoa (unsigned long long value, char *buf, unsigned int base,
int upper_case) attribute_hidden;
#if !_ITOA_NEEDED
/* No need for special long long versions. */
# define _itoa(value, buf, base, upper_case) \
_itoa_word (value, buf, base, upper_case)
# define _fitoa(value, buf, base, upper_case) \
_fitoa_word (value, buf, base, upper_case)
#endif
#endif /* itoa.h */
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