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author | pacien | 2018-11-23 12:31:11 +0100 |
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committer | pacien | 2018-11-23 12:31:11 +0100 |
commit | 52c08b0282aacb44c2e75cefeae5626a7aa1b21a (patch) | |
tree | dcf4df132277ecf4b12ade0464cf3175f9665dd2 /src/integers.nim | |
parent | 18258716b4193279e806cacbf766931d9ae3ffba (diff) | |
download | gziplike-52c08b0282aacb44c2e75cefeae5626a7aa1b21a.tar.gz |
Implement bitstream
Diffstat (limited to 'src/integers.nim')
-rw-r--r-- | src/integers.nim | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/integers.nim b/src/integers.nim new file mode 100644 index 0000000..1b9121c --- /dev/null +++ b/src/integers.nim | |||
@@ -0,0 +1,24 @@ | |||
1 | # "à-la-gzip" gzip-like LZSS compressor | ||
2 | # Copyright (C) 2018 Pacien TRAN-GIRARD | ||
3 | # | ||
4 | # This program is free software: you can redistribute it and/or modify | ||
5 | # it under the terms of the GNU Affero General Public License as | ||
6 | # published by the Free Software Foundation, either version 3 of the | ||
7 | # License, or (at your option) any later version. | ||
8 | # | ||
9 | # This program is distributed in the hope that it will be useful, | ||
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | # GNU Affero General Public License for more details. | ||
13 | # | ||
14 | # You should have received a copy of the GNU Affero General Public License | ||
15 | # along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
16 | |||
17 | const wordBitLength* = 8 | ||
18 | const wordBitMask* = 0b1111_1111'u8 | ||
19 | |||
20 | proc `/^`*[T: Natural](x, y: T): T = | ||
21 | (x + y - 1) div y | ||
22 | |||
23 | proc truncateToUint8*(x: SomeUnsignedInt): uint8 = | ||
24 | (x and wordBitMask).uint8 | ||