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Wildcard string compare (globbing)

, 15 Feb 2005 804.5K 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.

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About the Author

Jack Handy
Web Developer
United States United States
No Biography provided

Comments and Discussions

 
Generaldelphi port [modified] Pin
vovach77723-Dec-14 4:38
membervovach77723-Dec-14 4:38 
QuestionMy vote of 5+ Pin
Sanmayce29-Nov-13 8:47
memberSanmayce29-Nov-13 8:47 
GeneralMy vote of 5 Pin
Franc Morales29-May-13 16:47
memberFranc Morales29-May-13 16:47 
Questionhelp required for wilcard matching * and # Pin
SaimaAsif24-Feb-12 0:56
memberSaimaAsif24-Feb-12 0:56 
GeneralMy vote of 5 Pin
Plamen Petrov13-Dec-11 22:37
memberPlamen Petrov13-Dec-11 22:37 
SuggestionModification with '#' as wildcard joker for digits [modified] Pin
Thomas Haase26-Sep-11 0:16
memberThomas Haase26-Sep-11 0:16 
First of all I like this code, it is small and fully stand-alone.
I have modified it, because I need an additional wildcard joker that represents digits. Finally the modified function accepts '*', '?' and '#' as joker characters.

int wildcmp_ex(const char *wild, const char *string) {
  const char *cp = NULL, *mp = NULL;
 
  while (*string) {
    if (*wild == '*') {
      if (!*++wild) {
        return 1;
      }
      mp = wild;
      cp = string+1;
    } else if (((*wild == *string) && (*wild != '#')) || (*wild == '?') || ((*wild == '#') && isdigit(*string))) {
      wild++;
      string++;
    } else {
      if (mp)
      {
        wild = mp;
        string = cp++;
      }
      else
      {
        return 0;
      }
    }
  }
 
  while (*wild == '*') {
    wild++;
  }
  return !*wild;
}
Thomas Haase


modified 29-Sep-11 8:26am.

QuestionLicence Question Pin
randommark23-Nov-10 1:33
memberrandommark23-Nov-10 1:33 
AnswerAnother C# version, with a twist Pin
tomlev29-Jun-10 15:50
membertomlev29-Jun-10 15:50 
GeneralObscurity Pin
Chuck O'Toole25-Apr-10 19:18
memberChuck O'Toole25-Apr-10 19:18 
AnswerMy C# contribution - recursive, of course! Pin
RenniePet26-Mar-10 6:21
memberRenniePet26-Mar-10 6:21 
GeneralRe: My C# contribution - recursive, of course! Pin
Erwin de GRoot29-Mar-10 2:58
memberErwin de GRoot29-Mar-10 2:58 
GeneralDepends on whether you need to optimize the last few nanoseconds out of it... Pin
RenniePet29-Mar-10 8:45
memberRenniePet29-Mar-10 8:45 
GeneralSorry - revised numbers Pin
RenniePet29-Mar-10 9:35
memberRenniePet29-Mar-10 9:35 
GeneralRe: Depends on whether you need to optimize the last few nanoseconds out of it... Pin
Erwin de GRoot29-Mar-10 9:37
memberErwin de GRoot29-Mar-10 9:37 
GeneralYet another version - 25% faster, I think [modified] Pin
RenniePet1-Apr-10 9:24
memberRenniePet1-Apr-10 9:24 
GeneralRe: Yet another version - 25% faster, I think Pin
aleks1k21-Sep-11 3:47
memberaleks1k21-Sep-11 3:47 
QuestionI used this function but I how I can catch variables from the * ??? Pin
moh.hijjawi20-Oct-09 2:55
membermoh.hijjawi20-Oct-09 2:55 
AnswerRe: I used this function but I how I can catch variables from the * ??? Pin
RenniePet1-Apr-10 12:27
memberRenniePet1-Apr-10 12:27 
Questionany updates ? Pin
alhambra-eidos2-Jul-09 6:12
memberalhambra-eidos2-Jul-09 6:12 
GeneralImproved matching with end-of-text Pin
Anders Heie11-May-09 16:20
memberAnders Heie11-May-09 16:20 
GeneralRe: Improved matching with end-of-text: some cases don't work properly! Pin
roadrunner31412-Aug-09 4:35
memberroadrunner31412-Aug-09 4:35 
GeneralRe: Improved matching with end-of-text: some cases don't work properly! Pin
sdiazdiaz20-Jun-13 2:50
membersdiazdiaz20-Jun-13 2:50 
QuestionPathMatchSpec instead? Pin
kintz25-Mar-09 9:55
memberkintz25-Mar-09 9:55 
AnswerRe: PathMatchSpec instead? Pin
MandatoryDefault31-Aug-09 11:39
memberMandatoryDefault31-Aug-09 11:39 
Questionwchar_t version? Pin
rmorales8729-Nov-08 21:16
memberrmorales8729-Nov-08 21:16 

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