| /* Copyright (C) 1995-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@gnu.org>, August 1995. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdlib.h> |
| |
| #define TABLE_BASE 0x2e |
| #define TABLE_SIZE 0x4d |
| |
| #define XX ((char)0x40) |
| |
| |
| static const char a64l_table[TABLE_SIZE] = |
| { |
| /* 0x2e */ 0, 1, |
| /* 0x30 */ 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, XX, XX, XX, XX, XX, XX, |
| /* 0x40 */ XX, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, |
| /* 0x50 */ 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, XX, XX, XX, XX, XX, |
| /* 0x60 */ XX, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, |
| /* 0x70 */ 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 |
| }; |
| |
| |
| long int |
| a64l (const char *string) |
| { |
| const char *ptr = string; |
| unsigned long int result = 0ul; |
| const char *end = ptr + 6; |
| int shift = 0; |
| |
| do |
| { |
| unsigned index; |
| unsigned value; |
| |
| index = *ptr - TABLE_BASE; |
| if ((unsigned int) index >= TABLE_SIZE) |
| break; |
| value = (int) a64l_table[index]; |
| if (value == (int) XX) |
| break; |
| ++ptr; |
| result |= value << shift; |
| shift += 6; |
| } |
| while (ptr != end); |
| |
| return (long int) result; |
| } |