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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

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Comments and Discussions

 
GeneralRe: Improved matching with end-of-text: some cases don't work properly! Pin
roadrunner31412-Aug-09 4:35
memberroadrunner31412-Aug-09 4:35 
GeneralRe: Improved matching with end-of-text: some cases don't work properly! Pin
sdiazdiaz20-Jun-13 2:50
membersdiazdiaz20-Jun-13 2:50 
QuestionPathMatchSpec instead? Pin
kintz25-Mar-09 9:55
memberkintz25-Mar-09 9:55 
AnswerRe: PathMatchSpec instead? Pin
MandatoryDefault31-Aug-09 11:39
memberMandatoryDefault31-Aug-09 11:39 
Questionwchar_t version? Pin
rmorales8729-Nov-08 21:16
memberrmorales8729-Nov-08 21:16 
AnswerRe: wchar_t version? Pin
razvar31-Mar-11 22:49
memberrazvar31-Mar-11 22:49 
Generalwildcmp in XBLite Pin
CodeGibbon27-Nov-08 14:56
memberCodeGibbon27-Nov-08 14:56 
GeneralWildcard string compare in C# Pin
haiquang10-Nov-08 23:15
memberhaiquang10-Nov-08 23:15 
GeneralRe: Wildcard string compare in C# Pin
haiquang3-Aug-09 23:22
memberhaiquang3-Aug-09 23:22 
GeneralC# Direct Port Pin
hempels23-Sep-08 16:10
memberhempels23-Sep-08 16:10 
General...and yet another C# port [modified] Pin
DVF27-Aug-10 17:59
memberDVF27-Aug-10 17:59 
GeneralRe: ...and yet another C# port Pin
VUnreal21-Sep-10 12:22
memberVUnreal21-Sep-10 12:22 
GeneralMessage Removed Pin
stonber18-Sep-08 15:22
memberstonber18-Sep-08 15:22 
GeneralUsing in Artistic Style Pin
jimp023-Apr-08 5:43
memberjimp023-Apr-08 5:43 
GeneralGeez... Pin
larryfr5-Mar-08 10:39
memberlarryfr5-Mar-08 10:39 
QuestionConvert to a replace? Pin
williaps20-Mar-07 9:31
memberwilliaps20-Mar-07 9:31 
GeneralC# RexExp version Pin
spinsane4-Nov-06 7:30
memberspinsane4-Nov-06 7:30 
Here's RegExp version (may be easily ported to C++).
Pros: More readable, Relies on proven RegExp
Cons: Maybe slower?, If eval string contains RegExp keywords then it might result in unexpected result

public static bool Match(string eval, string pattern, bool caseSensitive)
{
bool match = false;

// Make input parameters lower-case if case is not an issue
if (!caseSensitive)
{
eval = eval.ToLower();
pattern = pattern.ToLower();
}

// Escape regexp special character in pattern
pattern = pattern.Replace(".", @"\.");

// Replace valid wildcards with regexp equivalents
pattern = pattern.Replace('?', '.').Replace("*", ".*");

// Add boundaries to pattern
pattern = @"\A" + pattern + @"\z";

// Search for a match
try
{
match = Regex.IsMatch(eval, pattern);
}
catch /* (ArgumentException ex) */
{
// Syntax error in the regular expression
}

// Return result
return match;
}

GeneralKudos Pin
quantumred14-Oct-06 5:37
memberquantumred14-Oct-06 5:37 
GeneralRe: Kudos Pin
milkplus24-Feb-10 12:19
membermilkplus24-Feb-10 12:19 
Generalwildcmp(&quot;*&amp;lt;*&amp;gt;&quot;, &quot;&amp;lt;field1&amp;gt;&amp;lt;field2&amp;gt;&quot;) not working [modified] Pin
Daniel B.6-Sep-06 14:14
memberDaniel B.6-Sep-06 14:14 
GeneralRe: wildcmp(&quot;*&amp;lt;*&amp;gt;&quot;, &quot;&amp;lt;field1&amp;gt;&amp;lt;field2&amp;gt;&quot;) not working Pin
radboudp16-Feb-07 1:35
memberradboudp16-Feb-07 1:35 
Generalreturn value type Pin
wdx048-Jan-06 16:49
memberwdx048-Jan-06 16:49 
General*? case match Pin
talimu4-Nov-05 0:42
membertalimu4-Nov-05 0:42 
GeneralRe: *? case match Pin
kuhnm15-Sep-06 3:18
memberkuhnm15-Sep-06 3:18 
GeneralRe: *? case match Pin
kuhnm18-Sep-06 5:48
memberkuhnm18-Sep-06 5:48 

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