glibc/stdio/_itoa.h

59 lines
1.8 KiB
C

/* Internal function for converting integers to ASCII.
Copyright (C) 1994, 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. */
#ifndef _ITOA_H
#define _ITOA_H
#include <sys/cdefs.h>
extern const char _itoa_lower_digits[], _itoa_upper_digits[];
/* 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 __P ((unsigned long long int value, char *buflim,
unsigned int base, int upper_case));
#ifndef _EXTERN_INLINE
#define _EXTERN_INLINE extern __inline
#endif
_EXTERN_INLINE
char *
_itoa (unsigned long long int value, char *buflim,
unsigned int base, int upper_case)
{
/* Base-36 digits for numbers. */
const char *digits = upper_case ? _itoa_upper_digits : _itoa_lower_digits;
register char *bp = buflim;
while (value > 0)
{
*--bp = digits[value % base];
value /= base;
}
return bp;
}
#endif /* itoa.h */