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Wildcard string compare (globbing)

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4.90 (79 votes)
15 Feb 2005
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

 
GeneralYes man - you a really cool developer Pin
Stanislav Panasik23-Oct-02 19:06
memberStanislav Panasik23-Oct-02 19:06 
GeneralRe: Yes man - you a really cool developer Pin
Anonymous28-Mar-04 13:43
memberAnonymous28-Mar-04 13:43 
GeneralPseudo Code... Pin
blahblah18-Apr-02 10:45
memberblahblah18-Apr-02 10:45 
GeneralRe: Pseudo Code... Pin
Targys8-Jan-03 2:43
memberTargys8-Jan-03 2:43 
Generaltoo complicated Pin
21-Mar-02 21:31
suss21-Mar-02 21:31 
GeneralRe: too complicated Pin
22-Mar-02 0:23
suss22-Mar-02 0:23 
GeneralRe: too complicated Pin
22-Mar-02 0:34
suss22-Mar-02 0:34 
GeneralRe: too complicated Pin
Jack Handy22-Mar-02 15:23
memberJack Handy22-Mar-02 15:23 
I don't know about the rest of you, but I personally prefer FAST code to SHORT code. The function you posted is considerably slower, do some benchmarks, I have.

This code....
int main(int argc, char **argv) {
    int x;
    for (x=0; x<9999999; x++) {
        wildcmp("*t?st?n*this*t*", "testin this sh*t");
    }
}
using your function...
real    0m13.170s
user    0m13.120s
sys     0m0.020s
using my function...
real    0m6.804s
user    0m6.790s
sys     0m0.000s


Furthermore I don't see why you criticize me for using loops when you are using a recursive function.

Thanks for your reply anyhow,

Jack
GeneralRe: too complicated Pin
22-Mar-02 21:40
suss22-Mar-02 21:40 
GeneralRe: too complicated Pin
Jack Handy22-Mar-02 22:26
memberJack Handy22-Mar-02 22:26 
GeneralRe: too complicated Pin
alex.barylski19-Apr-03 9:25
memberalex.barylski19-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
22-Mar-02 15:29
suss22-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
memberAnonymous2-Jun-03 14:48 
GeneralRe: too complicated Pin
Anonymous4-Dec-03 18:29
memberAnonymous4-Dec-03 18:29 

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Article
Posted 1 May 2001

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