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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

 
GeneralRe: Great Code Pinmembersiukurnin4-Jul-02 2:15 
GeneralRe: Great Code PinsussThe C++ Guru8-Sep-02 7:22 
GeneralRe: Great Code PinsussAnonymous4-Dec-03 18:53 
Generalwildcmp("fold","??*"); PinmemberVadim Chavarha24-May-01 8:43 
GeneralRe: wildcmp( PinmemberJack Handy29-May-01 10:01 
GeneralNot DOS compatible PinmemberMiroslav Rajcic2-May-01 3:56 
GeneralRe: Not DOS compatible PinmemberJack Handy2-May-01 12:03 
GeneralRe: Not DOS compatible PinmemberMiroslav Rajcic6-May-01 23:04 
Your workaround works only for "*.*" but does not solve the problem generally.
 
Example:
wildcmp("a*.*", "aaaa") should return true under DOS conventions.
 
Miroslav Rajcic
http://www.spacetide.com
GeneralDOS compatible workaround PinmemberFredrik Wangel5-Jul-01 1:47 
GeneralRe: Not DOS compatible PinmemberW2k27-Dec-02 13:26 
QuestionWhy, oh why only? PinmemberAnonymous2-May-01 2:17 
AnswerRe: Why, oh why only? PinmemberSimon Capewell2-May-01 2:39 
GeneralRe: Why, oh why only? PinmemberAnonymous5-Jul-01 10:27 
AnswerRe: Why, oh why only? PinmemberPaul McGuire4-Dec-01 4:18 

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