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Wildcard string compare (globbing)

, 15 Feb 2005
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Matches a string against a wildcard string such as "*.*" or "bl?h.*" etc. This is good for file globbing or to match hostmasks.

Usage:

This is a fast, lightweight, and simple pattern matching function.

if (wildcmp("bl?h.*", "blah.jpg")) {
  //we have a match!
} else {
  //no match =(
}

Function:

int wildcmp(const char *wild, const char *string) {
  // Written by Jack Handy - <A href="mailto:jakkhandy@hotmail.com">jakkhandy@hotmail.com</A>
  const char *cp = NULL, *mp = NULL;

  while ((*string) && (*wild != '*')) {
    if ((*wild != *string) && (*wild != '?')) {
      return 0;
    }
    wild++;
    string++;
  }

  while (*string) {
    if (*wild == '*') {
      if (!*++wild) {
        return 1;
      }
      mp = wild;
      cp = string+1;
    } else if ((*wild == *string) || (*wild == '?')) {
      wild++;
      string++;
    } else {
      wild = mp;
      string = cp++;
    }
  }

  while (*wild == '*') {
    wild++;
  }
  return !*wild;
}

License

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About the Author

Jack Handy
Web Developer
United States United States
No Biography provided

Comments and Discussions

 
Generaltoo complicated PinmemberThe C++ Guru21-Mar-02 21:31 
GeneralRe: too complicated PinmemberBig Spender22-Mar-02 0:23 
GeneralRe: too complicated PinmemberThe C++ Guru22-Mar-02 0:34 
GeneralRe: too complicated PinmemberJack Handy22-Mar-02 15:23 
I don't know about the rest of you, but I personally prefer FAST code to SHORT code. The function you posted is considerably slower, do some benchmarks, I have.
 
This code....
int main(int argc, char **argv) {
    int x;
    for (x=0; x<9999999; x++) {
        wildcmp("*t?st?n*this*t*", "testin this sh*t");
    }
}
using your function...
real    0m13.170s
user    0m13.120s
sys     0m0.020s
using my function...
real    0m6.804s
user    0m6.790s
sys     0m0.000s
 
Furthermore I don't see why you criticize me for using loops when you are using a recursive function.
 
Thanks for your reply anyhow,
 
Jack
GeneralRe: too complicated PinmemberThe C++ Guru22-Mar-02 21:40 
GeneralRe: too complicated PinmemberJack Handy22-Mar-02 22:26 
GeneralRe: too complicated PinmemberHockey19-Apr-03 9:25 
GeneralRe: too complicated Pinmemberdouglashogan25-Jan-04 12:34 
GeneralRe: too complicated PinmemberJack Handy25-Jan-04 12:40 
GeneralRe: too complicated Pinmemberdouglashogan25-Jan-04 12:50 

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