huahaofeng
/
aspnetcore
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Optimize StartsWithPrefix 

-Remove double "equality" test in StartsWithPrefix
-Further StartsWithPrefix efficiencies
-Remove subkey allocation in StartsWithPrefix
This commit is contained in:
Ben Adams 2016-02-10 00:15:49 +00:00 committed by Ryan Nowak
parent dacebacb90
commit 6c2c777bdc
1 changed files with 18 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/Microsoft.AspNetCore.Mvc.Abstractions/ModelBinding/ModelStateDictionary.cs
View File

@ -681,54 +681,51 @@ namespace Microsoft.AspNetCore.Mvc.ModelBinding
throw new ArgumentNullException(nameof(key));
}
if (StringComparer.OrdinalIgnoreCase.Equals(key, prefix))
if (prefix.Length == 0)
{
// Everything is prefixed by the empty string
return true;
}
if (key.Length <= prefix.Length)
if (key.Length < prefix.Length)
{
return false;
}
var subKeyIndex = 0;
if (!key.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
{
if (key.StartsWith("[", StringComparison.OrdinalIgnoreCase))
if (key[0] == '[')
{
var subKey = key.Substring(key.IndexOf('.') + 1);
subKeyIndex = key.IndexOf('.') + 1;
if (!subKey.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
if (string.Compare(key, subKeyIndex, prefix, 0, prefix.Length, StringComparison.OrdinalIgnoreCase) != 0)
{
return false;
}
if (string.Equals(prefix, subKey, StringComparison.OrdinalIgnoreCase))
else if (prefix.Length == (key.Length - subKeyIndex))
{
// prefix == subKey
return true;
}
key = subKey;
}
else
{
return false;
}
}
// Everything is prefixed by the empty string
if (prefix.Length == 0)
else if (key.Length == prefix.Length)
{
// key == prefix
return true;
}
else
var charAfterPrefix = key[subKeyIndex + prefix.Length];
switch (charAfterPrefix)
{
var charAfterPrefix = key[prefix.Length];
switch (charAfterPrefix)
{
case '[':
case '.':
return true;
}
case '[':
case '.':
return true;
}
return false;
@ -871,4 +868,4 @@ namespace Microsoft.AspNetCore.Mvc.ModelBinding
}
}
}
}
}