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[glibc.git] / stdlib / l64a.c
blob9fbde5d1394ab88926c4894a6596d7c6c3dcff89
1 /* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <stdlib.h>
22 /* Conversion table. */
23 static const char conv_table[64] =
25 '.', '/', '0', '1', '2', '3', '4', '5',
26 '6', '7', '8', '9', 'A', 'B', 'C', 'D',
27 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
28 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
29 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b',
30 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
31 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
32 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
35 char *
36 l64a (n)
37 long int n;
39 unsigned long int m = (unsigned long int) n;
40 static char result[7];
41 int cnt;
43 if (m == 0l)
44 /* The value for N == 0 is defined to be the empty string. */
45 return (char *) "";
47 result[6] = '\0';
49 for (cnt = 5; m > 0; --cnt)
51 result[cnt] = conv_table[m & 0x3f];
52 m >>= 6;
55 return &result[cnt + 1];