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| -rw-r--r-- | src/algorithms/bits/Bits.java | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/algorithms/bits/Bits.java b/src/algorithms/bits/Bits.java new file mode 100644 index 0000000..327a39e --- /dev/null +++ b/src/algorithms/bits/Bits.java @@ -0,0 +1,53 @@ +/** + * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +package algorithms.bits; + + +/** + * Operations on individual bits + */ +public class Bits +{ +£>for T in char byte short int long; do + /** + * Sets or clears individual bits in an integer + * + * @param value The value to modify + * @param mask Mask of bits to modify + * @param flag 1 if the bit should be set, 0 if the bit should be clears + * @return The value with the bits modified + */ + public static £{T} set_clear(£{T} value, £{T} mask, £{T} flag) + { + return (£{T})(value ^ ((-flag ^ value) & mask)); + } + + /** + * Sets or clears individual bits in an integer, superscalar version + * + * @param value The value to modify + * @param mask Mask of bits to modify + * @param flag 1 if the bit should be set, 0 if the bit should be clears + * @return The value with the bits modified + */ + public static £{T} set_clear_superscalar(£{T} value, £{T} mask, £{T} flag) + { + return (£{T})((value & ~mask) | (-flag & mask)); + } +£>done +} + |