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Wildcard string compare (globbing)

, 15 Feb 2005 806.6K 94
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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

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Jack Handy
Web Developer
United States United States
No Biography provided

Comments and Discussions

 
GeneralMany thanks, with 1 small gripe .. Pin
David Patrick29-Sep-04 8:41
memberDavid Patrick29-Sep-04 8:41 

most C compare functions return zero when the values are equal, but this function returns non-zero.

Personally, I find the non-zero to be more intuitive .. but after years of forcing myself to check for zero I find it a bit counter-intuitive.

I think I'll just rename the function when I add it to my library Smile | :)

But that certainly wont stop me from using this wonderful routine.

Many sincere thanks ...


GeneralRe: Many thanks, with 1 small gripe .. Pin
Jack Handy6-Oct-04 8:13
memberJack Handy6-Oct-04 8:13 
GeneralRe: Many thanks, with 1 small gripe .. Pin
Vic Mackey16-Oct-04 19:33
memberVic Mackey16-Oct-04 19:33 
GeneralRe: Many thanks, with 1 small gripe .. Pin
Voja Intermajstor24-Nov-04 23:26
memberVoja Intermajstor24-Nov-04 23:26 

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