commit | 716f98e399780802432a6f44e9f562c2d82fe628 | [log] [tgz] |
---|---|---|
author | Matthew Maurer <mmaurer@google.com> | Thu Mar 09 18:06:47 2023 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Thu Mar 09 18:06:47 2023 +0000 |
tree | 7442a329d612499cdc5be0c9b778eae0c2dc76d4 | |
parent | 34c8e34910b6f88cb6d55b294ee12bd18a611ab2 [diff] | |
parent | 5129762bc2a451892b428edd4fbdcad282bd81bc [diff] |
Make bitreader available to product and vendor am: e192529ed8 am: 7642b746a0 am: 0fb946a07f am: 5129762bc2 Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bitreader/+/2476080 Change-Id: I2a4e464f2386efa1a11355e210f5bf3712a82431 Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
BitReader is a helper type to extract strings of bits from a slice of bytes.
Here is how you read first a single bit, then three bits and finally four bits from a byte buffer:
use bitreader::BitReader; let slice_of_u8 = &[0b1000_1111]; let mut reader = BitReader::new(slice_of_u8); // You obviously should use try! or some other error handling mechanism here let a_single_bit = reader.read_u8(1).unwrap(); // 1 let more_bits = reader.read_u8(3).unwrap(); // 0 let last_bits_of_byte = reader.read_u8(4).unwrap(); // 0b1111
You can naturally read bits from longer buffer of data than just a single byte.
As you read bits, the internal cursor of BitReader moves on along the stream of bits. Big endian format is assumed when reading the multi-byte values. BitReader supports reading maximum of 64 bits at a time (with read_u64).
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.