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[Deflate] Use start/endIndex instead of count property of data input

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This commit is contained in:
Timofey Solomko
2021-10-18 18:31:40 +03:00
parent 113972bcce
commit 268aaaa356
1 changed files with 3 additions and 3 deletions
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Sources/Deflate/Deflate+Compress.swift
+3 -3
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@@ -146,7 +146,7 @@ extension Deflate: CompressionAlgorithm {
private static func lengthEncode(_ data: Data) -> (codes: [BLDCode], stats: [Int]) {
var buffer: [BLDCode] = []
var inputIndex = 0
var inputIndex = data.startIndex
/// Keys --- three-byte crc32, values --- positions in `data`.
var dictionary = [UInt32: Int]()
@@ -154,7 +154,7 @@ extension Deflate: CompressionAlgorithm {
// Last two bytes of input will be considered separately.
// This also allows to use length encoding for arrays with size less than 3.
while inputIndex < data.count - 2 {
while inputIndex < data.endIndex - 2 {
let byte = data[inputIndex]
let threeByteCrc = CheckSums.crc32(data[inputIndex..<inputIndex + 3])
@@ -203,7 +203,7 @@ extension Deflate: CompressionAlgorithm {
// For last two bytes there certainly will be no match.
// Moreover, `threeByteCrc` cannot be computed, so we need to put them in as `.byte`s.
while inputIndex < data.count {
while inputIndex < data.endIndex {
let byte = data[inputIndex]
buffer.append(BLDCode.byte(byte))
stats[byte.toInt()] += 1