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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 match Pinmemberkuhnm15-Sep-06 3:18 
GeneralRe: *? case match Pinmemberkuhnm18-Sep-06 5:48 
GeneralGets my 5 PinmemberFranc Morales18-Oct-05 18:05 
Generalmp and cp Pinmembertwopieman15-Mar-05 12:59 
GeneralRe: mp and cp Pinmemberradboudp16-Feb-07 2:14 
GeneralOK, but ... PinmemberSam Levy16-Feb-05 5:48 
QuestionWhy make 3 loop ? PinmemberDarkYoda Mickael2-Feb-05 23:22 
AnswerRe: Why make 3 loop ? PinmemberJack Handy13-Feb-05 11:02 
DarkYoda Mickael wrote:
I don't understand why you make 3 loop to do it ?
 
I think i don't see all case, because for me only the 2 loop make all the work ?

 
The third loop:
 
while (*wild == '*') {
    wild++;
}

 
is there to take care of trailing *'s. Since * means 0 or more chars, "test*" should match "test" just fine. That loop takes care of this case.
 
-Jack
 

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


GeneralC# version PinmemberSancy26-Oct-04 7:23 
GeneralRe: C# version PinsussPsyk6621-Dec-04 4:39 
GeneralRe: C# version PinmemberIonut FIlip22-Feb-05 7:15 
GeneralRe: C# version Pinmemberrobagar3-Apr-06 17:58 
GeneralRe: C# version PinmemberSancy5-Jun-06 17:01 
GeneralConvert to java base on C# version [modified, better look :~ ] Pinmemberquangtin321-Mar-08 22:13 
GeneralRe: C# version - an error! PinmemberMark T.4-Jul-08 15:37 
GeneralRe: C# version Pinmemberwilliamhix17-Oct-08 23:28 
GeneralMany thanks, with 1 small gripe .. PinmemberDavid Patrick29-Sep-04 9:41 
GeneralRe: Many thanks, with 1 small gripe .. PinmemberJack Handy6-Oct-04 9:13 
GeneralRe: Many thanks, with 1 small gripe .. PinmemberVic Mackey16-Oct-04 20:33 
GeneralRe: Many thanks, with 1 small gripe .. PinmemberVoja Intermajstor25-Nov-04 0:26 
GeneralNice code... Pinmembervoja2125-Aug-04 3:30 
GeneralSlight efficiency improvement PinmemberBill Buklis9-Jul-04 7:53 
GeneralRe: Slight efficiency improvement PinmemberBill Buklis9-Jul-04 8:19 
QuestionPathMatchSpec (shlwapi.h)? Pinmemberpeterchen28-Jun-04 7:56 
AnswerRe: PathMatchSpec (shlwapi.h)? PinmemberJack Handy13-Feb-05 10:56 

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