holger/Benchmark
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

added new method

Browse Source
This commit is contained in:
Holger Börchers
2020-10-04 00:42:32 +02:00
parent ea9b14feeb
commit 135b7379c1
5 changed files with 89 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
Identity.cs
View File

@@ -1,4 +1,4 @@
using System.Linq;
using System;
using System.Runtime.CompilerServices;
namespace Benchmark
@@ -20,29 +20,74 @@ namespace Benchmark
{
identity = default;
var position = value.Length;
if (!TryGetNumber(value, null, ref position, out var revision)) return false;
if (!TryGetNumberOld(ref value, null, ref position, out var revision)) return false;
if (value[position] != '-') return false;
if (!TryGetNumber(value, 7, ref position, out var index)) return false;
if (!TryGetPrefix(value, ref position, out var prefix)) return false;
if (!TryGetNumberOld(ref value, 7, ref position, out var index)) return false;
if (!TryGetPrefixOld(ref value, ref position, out var prefix)) return false;
identity = new Identity(prefix, index, revision);
return true; }
public static bool TryParse(Span<char> value, out Identity identity)
{
identity = default;
var position = value.Length;
if (!TryGetNumber(ref value, null, ref position, out var revision)) return false;
if (value[position] != '-') return false;
if (!TryGetNumber(ref value, 7, ref position, out var index)) return false;
if (!TryGetPrefix(ref value, ref position, out var prefix)) return false;
identity = new Identity(prefix, index, revision);
return true;
}
private static bool TryGetPrefix(in string identity, ref int lastPosition, out string prefix)
private static bool TryGetPrefixOld(ref string identity, ref int lastPosition, out string prefix)
{
prefix = identity.Remove(lastPosition + 1);
prefix = identity[(lastPosition + 1)..];
if (prefix.Length < 3) return false;
return !prefix.Any(character => character < 'A' || character > 'Z');
for (int i = 0; i < prefix.Length; i++)
{
if (prefix[i] < 'A' || prefix[i] > 'Z') return false;
}
return true;
}
private static bool TryGetNumber(in string identity, int? exactLength, ref int currentPosition, out int revision)
private static bool TryGetPrefix(ref Span<char> identity, ref int lastPosition, out string prefix)
{
var span = identity[(lastPosition + 1)..];
prefix = span.ToString();
if (span.Length < 3) return false;
for (int i = 0; i < span.Length; i++)
{
if (span[i] < 'A' || span[i] > 'Z') return false;
}
return true;
}
private static bool TryGetNumberOld(ref string identity, int? exactLength, ref int currentPosition, out int revision)
{
revision = 0;
var start = currentPosition;
for (currentPosition = start - 1; currentPosition >= 0; currentPosition--)
{
var current = identity[currentPosition];
if(current == '0') continue;
if (current == '0') continue;
if (current < '1' || current > '9') break;
revision += (current - '0') * IntegerPow(10, start - currentPosition - 1);
}
if (exactLength != null && start - (currentPosition + 1) != exactLength) return false;
return revision != default;
}
private static bool TryGetNumber(ref Span<char> identity, int? exactLength, ref int currentPosition, out int revision)
{
revision = 0;
var start = currentPosition;
for (currentPosition = start - 1; currentPosition >= 0; currentPosition--)
{
var current = identity[currentPosition];
if (current == '0') continue;
if (current < '1' || current > '9') break;
revision += (current - '0') * IntegerPow(10, start - currentPosition - 1);
}