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Posted 1 May 2001

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Wildcard string compare (globbing)

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4.90/5 (82 votes)
15 Feb 2005
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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Comments and Discussions

 
QuestionFastest wildcard function benchmarked with 3 compilers Pin
Sanmayce28-Nov-22 15:55
Sanmayce28-Nov-22 15:55 
QuestionMessage Closed Pin
17-Jun-21 15:45
Dayo Thomas17-Jun-21 15:45 
QuestionUnit tests please Pin
richarno2-Dec-19 23:03
richarno2-Dec-19 23:03 
Suggestionnice algorithm, but with a weakness Pin
senzabandiera8-Oct-16 0:24
senzabandiera8-Oct-16 0:24 
Generaldelphi port Pin
vovach77723-Dec-14 4:38
vovach77723-Dec-14 4:38 
QuestionMy vote of 5+ Pin
Sanmayce29-Nov-13 8:47
Sanmayce29-Nov-13 8:47 
GeneralMy vote of 5 Pin
Franc Morales29-May-13 16:47
Franc Morales29-May-13 16:47 
Questionhelp required for wilcard matching * and # Pin
SaimaAsif24-Feb-12 0:56
SaimaAsif24-Feb-12 0:56 
GeneralMy vote of 5 Pin
Plamen Petrov13-Dec-11 22:37
professionalPlamen Petrov13-Dec-11 22:37 
SuggestionModification with '#' as wildcard joker for digits Pin
Thomas Haase26-Sep-11 0:16
Thomas Haase26-Sep-11 0:16 
QuestionLicence Question Pin
randommark23-Nov-10 1:33
randommark23-Nov-10 1:33 
AnswerAnother C# version, with a twist Pin
Thomas Levesque29-Jun-10 15:50
professionalThomas Levesque29-Jun-10 15:50 
GeneralObscurity Pin
Chuck O'Toole25-Apr-10 19:18
Chuck O'Toole25-Apr-10 19:18 
AnswerMy C# contribution - recursive, of course! Pin
RenniePet26-Mar-10 6:21
RenniePet26-Mar-10 6:21 
GeneralRe: My C# contribution - recursive, of course! Pin
Erwin de GRoot29-Mar-10 2:58
Erwin 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
RenniePet29-Mar-10 8:45 
GeneralSorry - revised numbers Pin
RenniePet29-Mar-10 9:35
RenniePet29-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
Erwin de GRoot29-Mar-10 9:37 
GeneralYet another version - 25% faster, I think [modified] Pin
RenniePet1-Apr-10 9:24
RenniePet1-Apr-10 9:24 
GeneralRe: Yet another version - 25% faster, I think Pin
aleks1k21-Sep-11 3:47
aleks1k21-Sep-11 3:47 
QuestionI used this function but I how I can catch variables from the * ??? Pin
moh.hijjawi20-Oct-09 2:55
moh.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
RenniePet1-Apr-10 12:27 
Questionany updates ? Pin
kiquenet.com2-Jul-09 6:12
professionalkiquenet.com2-Jul-09 6:12 
GeneralImproved matching with end-of-text Pin
Anders Heie11-May-09 16:20
Anders Heie11-May-09 16:20 
GeneralRe: Improved matching with end-of-text: some cases don't work properly! Pin
roadrunner31412-Aug-09 4:35
roadrunner31412-Aug-09 4:35 

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