glibc/stdio/_itoa.c
1995-02-18 01:27:10 +00:00

46 lines
1.5 KiB
C

/* Internal function for converting integers to ASCII.
Copyright (C) 1994 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. */
#include <ansidecl.h>
#include "_itoa.h"
/* Lower-case digits. */
CONST char _itoa_lower_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
/* Upper-case digits. */
CONST char _itoa_upper_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
char *
DEFUN(_itoa, (value, buflim, base, upper_case),
unsigned long long int value AND char *buflim AND
unsigned int base AND 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;
}