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Wildcard Matching in C#

KY8 于 2009-02-06 07:24:46 发表.Net

public static bool Wildcard(string pattern, string input) 
{ 
    return Wildcard(pattern, 0, input, 0, false); 
} 
 
public static bool Wildcard(string pattern, string input, bool insensitive) 
{ 
    return Wildcard(pattern, 0, input, 0, insensitive); 
} 
 
private static bool Wildcard(string pattern, int p, string input, int i, bool insensitive) 
{ 
    for(; ; ) 
    { 
        char ic = input[i]; 
        char pc = pattern[p]; 
        switch(pc) 
        { 
            case '?': 
                break; 
 
            case '*': 
                p++; 
                for(int j = i; j < input.Length; j++) 
                { 
                    if(Wildcard(pattern, p, input, j, insensitive)) 
                    { 
                        return true; 
                    } 
                } 
                return false; 
 
            default: 
                if(insensitive) 
                { 
                    ic = char.ToLower(ic); 
                    pc = char.ToLower(pc); 
                } 
                if(ic != pc) 
                { 
                    return false; 
                } 
                break; 
        } 
        i++; 
        p++; 
        if(p >= pattern.Length) 
        { 
            if(i >= input.Length) 
            { 
                return true; 
            } 
            return false; 
        } 
        else if(i >= input.Length) 
        { 
            return false; 
        } 
    } 
}