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/* Copyright (C) 1995-2020 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
<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 (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;
}
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