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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.

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

Comments and Discussions

 
GeneralRe: great code, but ... Pin
Jack Handy18-Mar-03 14:25
memberJack Handy18-Mar-03 14:25 
GeneralRe: great code, but ... Pin
Anonymous20-Mar-03 0:13
sussAnonymous20-Mar-03 0:13 
GeneralNice Pin
Chris Richardson16-Jan-03 11:58
memberChris Richardson16-Jan-03 11:58 
GeneralRe: Nice Pin
Jack Handy20-Jan-03 12:56
memberJack Handy20-Jan-03 12:56 
GeneralCool Code Pin
Anonymous6-Dec-02 12:09
sussAnonymous6-Dec-02 12:09 
GeneralRe: Cool Code Pin
hector santos1-Mar-03 2:53
memberhector santos1-Mar-03 2:53 
GeneralRe: Cool Code Pin
Kent C. Dorner2-Mar-03 6:32
sussKent C. Dorner2-Mar-03 6:32 
GeneralRe: Cool Code Pin
gebrudergrimm28-Dec-03 11:18
membergebrudergrimm28-Dec-03 11:18 
GeneralRe: Cool Code Pin
BrcKcc15-Jun-04 9:18
memberBrcKcc15-Jun-04 9:18 
GeneralYes man - you a really cool developer Pin
Stanislav Panasik23-Oct-02 20:06
memberStanislav Panasik23-Oct-02 20:06 
GeneralRe: Yes man - you a really cool developer Pin
Anonymous28-Mar-04 14:43
sussAnonymous28-Mar-04 14:43 
GeneralPseudo Code... Pin
blahblah18-Apr-02 11:45
memberblahblah18-Apr-02 11:45 
GeneralRe: Pseudo Code... Pin
Targys8-Jan-03 3:43
memberTargys8-Jan-03 3:43 
Generaltoo complicated Pin
The C++ Guru21-Mar-02 22:31
memberThe C++ Guru21-Mar-02 22:31 
why use local variables and so many loops? it can be much easier to match two strings. i don't understand why so many people spend hours to search the web for wildcard matching when they can write it themselves in 5 minutes time??!
the code below could be shorter but it's easier to read like this.
i didn't debug it very much but it will work, though.

// -------------------------------------------------------------------
int wildcmp(const char* wild, const char* string)
// -------------------------------------------------------------------
{
   if(*wild == *string)
      return '\0' == *string || wildcmp(++wild, ++string);

   if('\0' == *string)
      return '*' == *wild && wildcmp(++wild, string);

   switch(*wild)
   {
   case '?':
      return wildcmp(++wild, ++string);

   case '*':
      wild++;

      if('\0' == *wild)
         return 1;
     
      while(*string != '\0')
         if(wildcmp(wild, string++))
            return 1;
     
   default:
      return 0;
   }
}

yours,
the c++ guru himself.
GeneralRe: too complicated Pin
Big Spender22-Mar-02 1:23
memberBig Spender22-Mar-02 1:23 
GeneralRe: too complicated Pin
The C++ Guru22-Mar-02 1:34
memberThe C++ Guru22-Mar-02 1:34 
GeneralRe: too complicated Pin
Jack Handy22-Mar-02 16:23
memberJack Handy22-Mar-02 16:23 
GeneralRe: too complicated Pin
The C++ Guru22-Mar-02 22:40
memberThe C++ Guru22-Mar-02 22:40 
GeneralRe: too complicated Pin
Jack Handy22-Mar-02 23:26
memberJack Handy22-Mar-02 23:26 
GeneralRe: too complicated Pin
Hockey19-Apr-03 10:25
memberHockey19-Apr-03 10:25 
GeneralRe: too complicated Pin
douglashogan25-Jan-04 13:34
memberdouglashogan25-Jan-04 13:34 
GeneralRe: too complicated Pin
Jack Handy25-Jan-04 13:40
memberJack Handy25-Jan-04 13:40 
GeneralRe: too complicated Pin
douglashogan25-Jan-04 13:50
memberdouglashogan25-Jan-04 13:50 
GeneralRe: too complicated Pin
Jim Bob22-Mar-02 16:29
memberJim Bob22-Mar-02 16:29 
GeneralRe: too complicated Pin
Simon Capewell22-May-02 3:48
memberSimon Capewell22-May-02 3:48 
GeneralRe: too complicated Pin
Targys8-Jan-03 2:57
memberTargys8-Jan-03 2:57 
GeneralRe: too complicated Pin
The C++ Guru24-Feb-03 11:43
sussThe C++ Guru24-Feb-03 11:43 
GeneralRe: too complicated Pin
Jack Handy24-Feb-03 17:52
memberJack Handy24-Feb-03 17:52 
GeneralRe: too complicated Pin
hector santos1-Mar-03 2:49
memberhector santos1-Mar-03 2:49 
GeneralRe: too complicated Pin
Kent C. Dorner2-Mar-03 6:26
sussKent C. Dorner2-Mar-03 6:26 
GeneralRe: too complicated Pin
hector santos2-Mar-03 11:05
memberhector santos2-Mar-03 11:05 
GeneralRe: too complicated Pin
Jack Handy2-Jun-03 14:56
memberJack Handy2-Jun-03 14:56 
GeneralRe: too complicated Pin
Anonymous2-Jun-03 15:48
sussAnonymous2-Jun-03 15:48 
GeneralRe: too complicated Pin
Anonymous4-Dec-03 19:29
sussAnonymous4-Dec-03 19:29 
GeneralRe: too complicated Pin
olegxxx4-Mar-05 20:24
memberolegxxx4-Mar-05 20:24 
GeneralSweet! Pin
EpicBoy1-Feb-02 17:08
memberEpicBoy1-Feb-02 17:08 
GeneralRe: Sweet! Pin
Michael Dunn1-Feb-02 18:10
memberMichael Dunn1-Feb-02 18:10 
GeneralRe: Sweet! Pin
Steve Mallam13-May-02 1:29
memberSteve Mallam13-May-02 1:29 
GeneralI found this very useful. Pin
Todd Smith4-Jan-02 15:40
memberTodd Smith4-Jan-02 15:40 
GeneralTest Cases Pin
Paul McGuire4-Dec-01 13:00
memberPaul McGuire4-Dec-01 13:00 
GeneralRe: Test Cases Pin
Lee Elenbaas10-Sep-08 0:05
memberLee Elenbaas10-Sep-08 0:05 
GeneralSuper fast code - super, but... Pin
Rene Rassnitzer23-Aug-01 7:24
memberRene Rassnitzer23-Aug-01 7:24 
GeneralGreat Code Pin
mediamaster404-Jul-01 21:18
membermediamaster404-Jul-01 21:18 
GeneralRe: Great Code Pin
Anonymous5-Jul-01 11:24
memberAnonymous5-Jul-01 11:24 
GeneralRe: Great Code Pin
siukurnin4-Jul-02 3:15
membersiukurnin4-Jul-02 3:15 
GeneralRe: Great Code Pin
The C++ Guru8-Sep-02 8:22
sussThe C++ Guru8-Sep-02 8:22 
GeneralRe: Great Code Pin
Anonymous4-Dec-03 19:53
sussAnonymous4-Dec-03 19:53 
Generalwildcmp("fold","??*"); Pin
Vadim Chavarha24-May-01 9:43
memberVadim Chavarha24-May-01 9:43 
GeneralRe: wildcmp( Pin
Jack Handy29-May-01 11:01
memberJack Handy29-May-01 11:01 
GeneralNot DOS compatible Pin
Miroslav Rajcic2-May-01 4:56
memberMiroslav Rajcic2-May-01 4:56 

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