1/* Internal function for converting integers to ASCII. 2 Copyright (C) 1994,95,96,97,98,99,2002,2003 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20#ifndef _ITOWA_H 21#define _ITOWA_H 1 22 23/* Convert VALUE into ASCII in base BASE (2..16). 24 Write backwards starting the character just before BUFLIM. 25 Return the address of the first (left-to-right) character in the number. 26 Use upper case letters iff UPPER_CASE is nonzero. */ 27 28static const wchar_t _itowa_lower_digits[16] = L_("0123456789abcdef"); 29static const wchar_t _itowa_upper_digits[16] = L_("0123456789ABCDEF"); 30 31static inline wchar_t * 32__attribute__ ((unused, always_inline)) 33_itowa_word (unsigned long value, wchar_t *buflim, 34 unsigned int base, int upper_case) 35{ 36 const wchar_t *digits = (upper_case 37 ? _itowa_upper_digits : _itowa_lower_digits); 38 wchar_t *bp = buflim; 39 40 switch (base) 41 { 42#define SPECIAL(Base) \ 43 case Base: \ 44 do \ 45 *--bp = digits[value % Base]; \ 46 while ((value /= Base) != 0); \ 47 break 48 49 SPECIAL (10); 50 SPECIAL (16); 51 SPECIAL (8); 52 default: 53 do 54 *--bp = digits[value % base]; 55 while ((value /= base) != 0); 56 } 57 return bp; 58} 59 60static inline wchar_t * 61__attribute__ ((unused, always_inline)) 62_itowa (uint64_t value, wchar_t *buflim, 63 unsigned int base, int upper_case) 64{ 65 const wchar_t *digits = (upper_case 66 ? _itowa_upper_digits : _itowa_lower_digits); 67 wchar_t *bp = buflim; 68 69 switch (base) 70 { 71 SPECIAL (10); 72 SPECIAL (16); 73 SPECIAL (8); 74 default: 75 do 76 *--bp = digits[value % base]; 77 while ((value /= base) != 0); 78 } 79 return bp; 80} 81#undef SPECIAL 82 83#endif /* itowa.h */ 84