-/* Copyright (C) 1995, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+ 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://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 (string)
- const char *string;
+a64l (const char *string)
{
- size_t cnt;
- unsigned long int result = 0l;
+ const char *ptr = string;
+ unsigned long int result = 0ul;
+ const char *end = ptr + 6;
+ int shift = 0;
- for (cnt = 0; cnt < 6; ++cnt)
+ do
{
- result <<= 6;
- switch (string[cnt])
- {
- case '.':
- break;
- case '/':
- result |= 1;
- break;
- case '0' ... '9':
- result |= 2 + string[cnt] - '0';
- break;
- case 'A' ... 'Z':
- result |= 12 + string[cnt] - 'A';
- break;
- case 'a' ... 'z':
- result |= 38 + string[cnt] - 'a';
- break;
- default:
- return result >> 6;
- }
+ 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;
}