1 /* Internal function for converting integers to ASCII. 2 Copyright (C) 1994-1999,2002,2003,2007 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 _ITOA_H 21 #define _ITOA_H 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 28 static const char _itoa_lower_digits[16] = "0123456789abcdef"; 29 static const char _itoa_upper_digits[16] = "0123456789ABCDEF"; 30 31 static inline char * __attribute__ ((unused, always_inline)) 32 _itoa_word (unsigned long value, char *buflim, 33 unsigned int base, int upper_case) 34 { 35 const char *digits = (upper_case ? _itoa_upper_digits : _itoa_lower_digits); 36 37 switch (base) 38 { 39 # define SPECIAL(Base) \ 40 case Base: \ 41 do \ 42 *--buflim = digits[value % Base]; \ 43 while ((value /= Base) != 0); \ 44 break 45 46 SPECIAL (10); 47 SPECIAL (16); 48 SPECIAL (8); 49 default: 50 do 51 *--buflim = digits[value % base]; 52 while ((value /= base) != 0); 53 } 54 return buflim; 55 } 56 57 static inline char * __attribute__ ((unused, always_inline)) 58 _itoa (uint64_t value, char *buflim, 59 unsigned int base, int upper_case) 60 { 61 const char *digits = (upper_case ? _itoa_upper_digits : _itoa_lower_digits); 62 63 switch (base) 64 { 65 SPECIAL (10); 66 SPECIAL (16); 67 SPECIAL (8); 68 default: 69 do 70 *--buflim = digits[value % base]; 71 while ((value /= base) != 0); 72 } 73 return buflim; 74 } 75 # undef SPECIAL 76 77 #endif /* itoa.h */ 78