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Wildcard string compare (globbing)

, 15 Feb 2005 818.4K 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

 
Generaltoo complicated Pin
The C++ Guru21-Mar-02 21:31
memberThe C++ Guru21-Mar-02 21:31 
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 0:23
memberBig Spender22-Mar-02 0:23 
GeneralRe: too complicated Pin
The C++ Guru22-Mar-02 0:34
memberThe C++ Guru22-Mar-02 0:34 
GeneralRe: too complicated Pin
Jack Handy22-Mar-02 15:23
memberJack Handy22-Mar-02 15:23 
GeneralRe: too complicated Pin
The C++ Guru22-Mar-02 21:40
memberThe C++ Guru22-Mar-02 21:40 
GeneralRe: too complicated Pin
Jack Handy22-Mar-02 22:26
memberJack Handy22-Mar-02 22:26 
GeneralRe: too complicated Pin
Hockey19-Apr-03 9:25
memberHockey19-Apr-03 9:25 
GeneralRe: too complicated Pin
douglashogan25-Jan-04 12:34
memberdouglashogan25-Jan-04 12:34 
GeneralRe: too complicated Pin
Jack Handy25-Jan-04 12:40
memberJack Handy25-Jan-04 12:40 
GeneralRe: too complicated Pin
douglashogan25-Jan-04 12:50
memberdouglashogan25-Jan-04 12:50 
GeneralRe: too complicated Pin
Jim Bob22-Mar-02 15:29
memberJim Bob22-Mar-02 15:29 
GeneralRe: too complicated Pin
Simon Capewell22-May-02 2:48
memberSimon Capewell22-May-02 2:48 
GeneralRe: too complicated Pin
Targys8-Jan-03 1:57
memberTargys8-Jan-03 1:57 
GeneralRe: too complicated Pin
The C++ Guru24-Feb-03 10:43
sussThe C++ Guru24-Feb-03 10:43 
GeneralRe: too complicated Pin
Jack Handy24-Feb-03 16:52
memberJack Handy24-Feb-03 16:52 
GeneralRe: too complicated Pin
hector santos1-Mar-03 1:49
memberhector santos1-Mar-03 1:49 
GeneralRe: too complicated Pin
Kent C. Dorner2-Mar-03 5:26
sussKent C. Dorner2-Mar-03 5:26 
GeneralRe: too complicated Pin
hector santos2-Mar-03 10:05
memberhector santos2-Mar-03 10:05 
GeneralRe: too complicated Pin
Jack Handy2-Jun-03 13:56
memberJack Handy2-Jun-03 13:56 
GeneralRe: too complicated Pin
Anonymous2-Jun-03 14:48
sussAnonymous2-Jun-03 14:48 
GeneralRe: too complicated Pin
Anonymous4-Dec-03 18:29
sussAnonymous4-Dec-03 18:29 
GeneralRe: too complicated Pin
olegxxx4-Mar-05 19:24
memberolegxxx4-Mar-05 19:24 

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