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#62 use byte array instance rather than interface for input bytes

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This commit is contained in:
Eliot Jones
2019-08-20 21:37:31 +01:00
parent bbe5409f94
commit 613af46472
1 changed files with 31 additions and 12 deletions
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43
src/UglyToad.PdfPig/IO/ByteArrayInputBytes.cs
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@@ -3,15 +3,36 @@
using System; using System;
using System.Collections.Generic; using System.Collections.Generic;
using System.Diagnostics; using System.Diagnostics;
using System.Linq;
internal class ByteArrayInputBytes : IInputBytes internal class ByteArrayInputBytes : IInputBytes
{ {
private readonly IReadOnlyList<byte> bytes; private readonly byte[] bytes;
[DebuggerStepThrough] [DebuggerStepThrough]
public ByteArrayInputBytes(IReadOnlyList<byte> bytes) public ByteArrayInputBytes(IReadOnlyList<byte> bytes)
{ {
this.bytes = bytes; if (bytes == null)
{
throw new ArgumentNullException(nameof(bytes));
}
if (bytes is byte[] arr)
{
this.bytes = arr;
}
else
{
this.bytes = bytes.ToArray();
}
currentOffset = -1;
}
[DebuggerStepThrough]
public ByteArrayInputBytes(byte[] bytes)
{
this.bytes = bytes ?? throw new ArgumentNullException(nameof(bytes));
currentOffset = -1; currentOffset = -1;
} }
@@ -20,7 +41,7 @@
public bool MoveNext() public bool MoveNext()
{ {
if (currentOffset == bytes.Count - 1) if (currentOffset == bytes.Length - 1)
{ {
return false; return false;
} }
@@ -32,11 +53,11 @@
public byte CurrentByte { get; private set; } public byte CurrentByte { get; private set; }
public long Length => bytes.Count; public long Length => bytes.Length;
public byte? Peek() public byte? Peek()
{ {
if (currentOffset == bytes.Count - 1) if (currentOffset == bytes.Length - 1)
{ {
return null; return null;
} }
@@ -46,7 +67,7 @@
public bool IsAtEnd() public bool IsAtEnd()
{ {
return currentOffset == bytes.Count - 1; return currentOffset == bytes.Length - 1;
} }
public void Seek(long position) public void Seek(long position)
@@ -78,13 +99,11 @@
return 0; return 0;
} }
var viableLength = (bytes.Count - currentOffset - 1); var viableLength = (bytes.Length - currentOffset - 1);
var readLength = (int)(viableLength < bytesToRead ? viableLength : bytesToRead); var readLength = (int)(viableLength < bytesToRead ? viableLength : bytesToRead);
var startFrom = (int)currentOffset; var startFrom = (int)currentOffset + 1;
for (var i = 0; i < readLength; i++)
{ Array.Copy(bytes, startFrom, buffer, 0, readLength);
buffer[i] = bytes[startFrom + i + 1];
}
if (readLength > 0) if (readLength > 0)
{ {