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Wildcard string compare (globbing)

, 15 Feb 2005 820.3K 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.

A list of licenses authors might use can be found here

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About the Author

Jack Handy
Web Developer
United States United States
No Biography provided

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Comments and Discussions

 
GeneralRe: C# version - an error! Pin
Mark T.4-Jul-08 14:37
memberMark T.4-Jul-08 14:37 
GeneralRe: C# version Pin
williamhix17-Oct-08 22:28
memberwilliamhix17-Oct-08 22:28 
GeneralMany thanks, with 1 small gripe .. Pin
David Patrick29-Sep-04 8:41
memberDavid Patrick29-Sep-04 8:41 
GeneralRe: Many thanks, with 1 small gripe .. Pin
Jack Handy6-Oct-04 8:13
memberJack Handy6-Oct-04 8:13 
GeneralRe: Many thanks, with 1 small gripe .. Pin
Vic Mackey16-Oct-04 19:33
memberVic Mackey16-Oct-04 19:33 
GeneralRe: Many thanks, with 1 small gripe .. Pin
Voja Intermajstor24-Nov-04 23:26
memberVoja Intermajstor24-Nov-04 23:26 
GeneralNice code... Pin
voja2125-Aug-04 2:30
membervoja2125-Aug-04 2:30 
GeneralSlight efficiency improvement Pin
Bill Buklis9-Jul-04 6:53
memberBill Buklis9-Jul-04 6:53 

Great piece of code, but I have one minor improvement. It appears to me that the variable "cp" doesn't do anything and servers no purpose.

If I'm correct, then you can safely remove the line:
cp = string+1;


and also remove:
string = cp;


and replace:
cp = string++;


with:
++string;



I'm believe the results would be identical.

GeneralRe: Slight efficiency improvement Pin
Bill Buklis9-Jul-04 7:19
memberBill Buklis9-Jul-04 7:19 
QuestionPathMatchSpec (shlwapi.h)? Pin
peterchen28-Jun-04 6:56
memberpeterchen28-Jun-04 6:56 
AnswerRe: PathMatchSpec (shlwapi.h)? Pin
Jack Handy13-Feb-05 9:56
memberJack Handy13-Feb-05 9:56 
GeneralDoesnt seem to work well.. Pin
Bikram Singh13-May-04 1:56
sussBikram Singh13-May-04 1:56 
GeneralRe: Doesnt seem to work well.. Pin
Jack Handy21-Jun-04 9:13
memberJack Handy21-Jun-04 9:13 
GeneralCase Insensitive wildcmp Pin
Techiex16-Mar-04 9:36
memberTechiex16-Mar-04 9:36 
GeneralRe: Case Insensitive wildcmp Pin
Neville Franks16-Mar-04 9:52
memberNeville Franks16-Mar-04 9:52 
GeneralRe: Case Insensitive wildcmp Pin
Techiex23-Mar-04 9:33
memberTechiex23-Mar-04 9:33 
GeneralRe: Case Insensitive wildcmp Pin
DavidCrow23-Feb-05 2:24
memberDavidCrow23-Feb-05 2:24 
GeneralRe: Case Insensitive wildcmp Pin
Vic Mackey23-Feb-05 8:00
memberVic Mackey23-Feb-05 8:00 
GeneralRe: Case Insensitive wildcmp Pin
DavidCrow23-Feb-05 8:22
memberDavidCrow23-Feb-05 8:22 
GeneralRe: Case Insensitive wildcmp Pin
f_randy12-Jun-06 18:13
memberf_randy12-Jun-06 18:13 
GeneralExcellent code! Pin
Hans Dietrich16-Jul-03 19:40
memberHans Dietrich16-Jul-03 19:40 
Generalchecking for null Pin
Jack Handy13-Mar-03 20:38
memberJack Handy13-Mar-03 20:38 
GeneralRe: checking for null Pin
Anonymous15-Mar-03 20:10
sussAnonymous15-Mar-03 20:10 
GeneralRe: checking for null Pin
Jack Handy18-Mar-03 13:25
memberJack Handy18-Mar-03 13:25 
Generalgreat code, but ... Pin
Anonymous12-Mar-03 3:17
sussAnonymous12-Mar-03 3:17 

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