/* Copyright (C) 1995, 1997, 1998, 1999 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; }