13  * glob_match - Shell-style pattern matching, like !fnmatch(pat, str, 0)
14  * @pat: Shell-style pattern to match, e.g. "*.[ch]".
17  * Perform shell-style glob matching, returning true (1) if the match
21  * (And, inside character classes, !, - and ].)
25  * does not preprocess the patterns.  It is non-recursive, and run-time
35  * are complemented by a leading !; this does not support the regex-style
36  * [^a-z] syntax.
51 	 * Loop over each token (character or class) in pat, matching  in glob_match()
57 		unsigned char d = *pat++;  in glob_match()  local
59 		switch (d) {  in glob_match()
64 		case '*':	/* Any-length wildcard */  in glob_match()
68 			back_str = --str;	/* Allow zero-length match */  in glob_match()
70 		case '[': {	/* Character class */  in glob_match()
74 			char const *class = pat + inverted;  in glob_match()  local
75 			unsigned char a = *class++;  in glob_match()
78 			 * Iterate over each span in the character class.  in glob_match()
80 			 * range a-b.  The first span may begin with ']'.  in glob_match()
88 				if (class[0] == '-' && class[1] != ']') {  in glob_match()
89 					b = class[1];  in glob_match()
94 					class += 2;  in glob_match()
98 			} while ((a = *class++) != ']');  in glob_match()
102 			pat = class;  in glob_match()
106 			d = *pat++;  in glob_match()
110 			if (c == d) {  in glob_match()
111 				if (d == '\0')  in glob_match()