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Merge pull request #2110 from ivandrofly/utilities_opt

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[Utilities] - Update/Optimize.
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Nikolaj Olsson 2016-11-25 19:57:27 +01:00 committed by GitHub
commit be82eb7375
1 changed files with 41 additions and 14 deletions
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55
libse/Utilities.cs
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@ -1202,24 +1202,51 @@ namespace Nikse.SubtitleEdit.Core
private static string ReverseString(string s) private static string ReverseString(string s)
{ {
var charArray = s.ToCharArray(); int len = s.Length;
Array.Reverse(charArray); if (len <= 1)
return new string(charArray); {
return s;
}
char[] chars = new char[len];
// O(n)
for (int i = 0; i < len; i++)
{
chars[i] = s[len - i - 1];
}
return new string(chars);
} }
private static string ReverseParenthesis(string s) private static string ReverseParenthesis(string s)
{ {
const string k = "@__<<>___@"; if (string.IsNullOrEmpty(s))
{
s = s.Replace("(", k); return s;
s = s.Replace(')', '('); }
s = s.Replace(k, ")"); int len = s.Length;
char[] chars = new char[len];
s = s.Replace("[", k); // O(n)
s = s.Replace(']', '['); for (int i = len - 1; i >= 0; i--)
s = s.Replace(k, "]"); {
char ch = s[i];
return s; if (ch == '(')
{
ch = ')';
}
else if (ch == ')')
{
ch = '(';
}
else if (ch == '[')
{
ch = ']';
}
else if (ch == ']')
{
ch = '[';
}
chars[i] = ch;
}
return new string(chars);
} }
public static string FixEnglishTextInRightToLeftLanguage(string text, string reverseChars) public static string FixEnglishTextInRightToLeftLanguage(string text, string reverseChars)