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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

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.

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About the Author

Jack Handy
Web Developer
United States United States
No Biography provided

Comments and Discussions

 
GeneralRe: Case Insensitive wildcmp PinmemberDavidCrow23-Feb-05 3:24 
GeneralRe: Case Insensitive wildcmp PinmemberVic Mackey23-Feb-05 9:00 
GeneralRe: Case Insensitive wildcmp PinmemberDavidCrow23-Feb-05 9:22 
GeneralRe: Case Insensitive wildcmp Pinmemberf_randy12-Jun-06 19:13 
GeneralExcellent code! PinmemberHans Dietrich16-Jul-03 20:40 
Generalchecking for null PinmemberJack Handy13-Mar-03 21:38 
I've seen a few people in these boards complain that I didn't check for null pointers in this function. This is a C function and the last time I checked, passing NULL to strcmp or any other C string function will segfault. I'm not saying this is great, and if you wanted to add a check for null, that would be fine. I just don't think that this is a 'bug' (if you can even call it that) worth flaming an otherwise great function.
 
-Jack
 

There are 10 types of people in this world, those that understand binary and those who don't.


GeneralRe: checking for null PinsussAnonymous15-Mar-03 21:10 
GeneralRe: checking for null PinmemberJack Handy18-Mar-03 14:25 
Generalgreat code, but ... PinsussAnonymous12-Mar-03 4:17 
GeneralRe: great code, but ... PinmemberJack Handy13-Mar-03 21:34 

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