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Wildcard string compare (globbing)

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4.90/5 (82 votes)
15 Feb 2005 1.1M   96   144
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

 
GeneralRe: C# version Pin
williamhix17-Oct-08 23:28
williamhix17-Oct-08 23:28 
GeneralMany thanks, with 1 small gripe .. Pin
David Patrick29-Sep-04 9:41
David Patrick29-Sep-04 9:41 
GeneralRe: Many thanks, with 1 small gripe .. Pin
Jack Handy6-Oct-04 9:13
Jack Handy6-Oct-04 9:13 
GeneralRe: Many thanks, with 1 small gripe .. Pin
Vic Mackey16-Oct-04 20:33
Vic Mackey16-Oct-04 20:33 
GeneralRe: Many thanks, with 1 small gripe .. Pin
Voja Intermajstor25-Nov-04 0:26
Voja Intermajstor25-Nov-04 0:26 
GeneralNice code... Pin
Voja Intermajstor25-Aug-04 3:30
Voja Intermajstor25-Aug-04 3:30 
GeneralSlight efficiency improvement Pin
GKarRacer9-Jul-04 7:53
GKarRacer9-Jul-04 7:53 
GeneralRe: Slight efficiency improvement Pin
GKarRacer9-Jul-04 8:19
GKarRacer9-Jul-04 8:19 
Maybe I posted too soon. I didn't think there was a way for cp to not equal string+1. But, after thinking about it some more I found a pattern type that would:

*???c*

It's interesting how the loop keeps shifting back and forth with this type of pattern.

However, using a test string of "testing" with the above pattern the match still failed (correctly) using both algorithms. But, there easily may be a pattern and string combination that wouldn't work without cp.
QuestionPathMatchSpec (shlwapi.h)? Pin
peterchen28-Jun-04 7:56
peterchen28-Jun-04 7:56 
AnswerRe: PathMatchSpec (shlwapi.h)? Pin
Jack Handy13-Feb-05 10:56
Jack Handy13-Feb-05 10:56 
GeneralDoesnt seem to work well.. Pin
bikram singh13-May-04 2:56
bikram singh13-May-04 2:56 
GeneralRe: Doesnt seem to work well.. Pin
Jack Handy21-Jun-04 10:13
Jack Handy21-Jun-04 10:13 
GeneralCase Insensitive wildcmp Pin
Member 95170316-Mar-04 10:36
Member 95170316-Mar-04 10:36 
GeneralRe: Case Insensitive wildcmp Pin
Neville Franks16-Mar-04 10:52
Neville Franks16-Mar-04 10:52 
GeneralRe: Case Insensitive wildcmp Pin
23-Mar-04 10:33
suss23-Mar-04 10:33 
GeneralRe: Case Insensitive wildcmp Pin
David Crow23-Feb-05 3:24
David Crow23-Feb-05 3:24 
GeneralRe: Case Insensitive wildcmp Pin
Vic Mackey23-Feb-05 9:00
Vic Mackey23-Feb-05 9:00 
GeneralRe: Case Insensitive wildcmp Pin
David Crow23-Feb-05 9:22
David Crow23-Feb-05 9:22 
GeneralRe: Case Insensitive wildcmp Pin
f_randy12-Jun-06 19:13
f_randy12-Jun-06 19:13 
GeneralExcellent code! Pin
Hans Dietrich16-Jul-03 20:40
mentorHans Dietrich16-Jul-03 20:40 
Generalchecking for null Pin
Jack Handy13-Mar-03 21:38
Jack Handy13-Mar-03 21:38 
GeneralRe: checking for null Pin
Anonymous15-Mar-03 21:10
Anonymous15-Mar-03 21:10 
GeneralRe: checking for null Pin
Jack Handy18-Mar-03 14:25
Jack Handy18-Mar-03 14:25 
Generalgreat code, but ... Pin
Anonymous12-Mar-03 4:17
Anonymous12-Mar-03 4:17 
GeneralRe: great code, but ... Pin
Jack Handy13-Mar-03 21:34
Jack Handy13-Mar-03 21:34 

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