Click here to Skip to main content
Click here to Skip to main content

Wildcard string compare (globbing)

, 15 Feb 2005
Rate this:
Please Sign up or sign in to vote.
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

Share

About the Author

Jack Handy
Web Developer
United States United States
No Biography provided

Comments and Discussions

 
QuestionMy vote of 5+ PinmemberSanmayce29-Nov-13 7:47 
GeneralMy vote of 5 PinmemberFranc Morales29-May-13 15:47 
Questionhelp required for wilcard matching * and # PinmemberSaimaAsif23-Feb-12 23:56 
GeneralMy vote of 5 PinmemberPlamen Petrov13-Dec-11 21:37 
SuggestionModification with '#' as wildcard joker for digits [modified] PinmemberThomas Haase25-Sep-11 23:16 
QuestionLicence Question Pinmemberrandommark23-Nov-10 0:33 
AnswerAnother C# version, with a twist Pinmembertomlev29-Jun-10 14:50 
GeneralObscurity PinmemberChuck O'Toole25-Apr-10 18:18 
AnswerMy C# contribution - recursive, of course! PinmemberRenniePet26-Mar-10 5:21 
GeneralRe: My C# contribution - recursive, of course! PinmemberErwin de GRoot29-Mar-10 1:58 
GeneralDepends on whether you need to optimize the last few nanoseconds out of it... PinmemberRenniePet29-Mar-10 7:45 
GeneralSorry - revised numbers PinmemberRenniePet29-Mar-10 8:35 
GeneralRe: Depends on whether you need to optimize the last few nanoseconds out of it... PinmemberErwin de GRoot29-Mar-10 8:37 
GeneralYet another version - 25% faster, I think [modified] PinmemberRenniePet1-Apr-10 8:24 
GeneralRe: Yet another version - 25% faster, I think Pinmemberaleks1k21-Sep-11 2:47 
QuestionI used this function but I how I can catch variables from the * ??? Pinmembermoh.hijjawi20-Oct-09 1:55 
AnswerRe: I used this function but I how I can catch variables from the * ??? PinmemberRenniePet1-Apr-10 11:27 
Questionany updates ? Pinmemberalhambra-eidos2-Jul-09 5:12 
GeneralImproved matching with end-of-text PinmemberAnders Heie11-May-09 15:20 
GeneralRe: Improved matching with end-of-text: some cases don't work properly! Pinmemberroadrunner31412-Aug-09 3:35 
GeneralRe: Improved matching with end-of-text: some cases don't work properly! Pinmembersdiazdiaz20-Jun-13 1:50 
QuestionPathMatchSpec instead? Pinmemberkintz25-Mar-09 8:55 
AnswerRe: PathMatchSpec instead? PinmemberMandatoryDefault31-Aug-09 10:39 
Questionwchar_t version? Pinmemberrmorales8729-Nov-08 20:16 
AnswerRe: wchar_t version? Pinmemberrazvar31-Mar-11 21:49 
This is great and got my 5 because is simple, fast and useful!
 
Here is the wchar_t version:
 
int wildcmp(const wchar_t *wild, const wchar_t *string)
  {
  const wchar_t *cp = NULL, *mp = NULL;
 
  while ((*string) && (*wild != L'*')) {
    if ((towlower(*wild) != towlower(*string)) && (*wild != L'?')) {
      return 0;
    }
    wild++;
    string++;
  }
 
  while (*string) {
    if (*wild == L'*') {
      if (!*++wild) {
        return 1;
      }
      mp = wild;
      cp = string+1;
    } else if ((towlower(*wild) == towlower(*string)) || (*wild == L'?')) {
      wild++;
      string++;
    } else {
      wild = mp;
      string = cp++;
    }
  }
 
  while (*wild == L'*') {
    wild++;
  }
  return !*wild;
}
 
Example:
 
if (wildcmp(L"*bl?h.*", L"asblah.plm")) {
  //we have a match!
   MessageBox(0,"we have a match!","wildcmp wide",MB_TOPMOST);
} else {
  //no match =(
      MessageBox(0,"no match!","wildcmp wide",MB_TOPMOST);
}

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web04 | 2.8.141029.1 | Last Updated 15 Feb 2005
Article Copyright 2001 by Jack Handy
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid