diff options
Diffstat (limited to 'lib/parser.c')
| -rw-r--r-- | lib/parser.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/parser.c b/lib/parser.c index 807b2aaa33fa..ee5295541cea 100644 --- a/lib/parser.c +++ b/lib/parser.c @@ -193,6 +193,56 @@ int match_hex(substring_t *s, int *result) } /** + * match_wildcard: - parse if a string matches given wildcard pattern + * @pattern: wildcard pattern + * @str: the string to be parsed + * + * Description: Parse the string @str to check if matches wildcard + * pattern @pattern. The pattern may contain two type wildcardes: + * '*' - matches zero or more characters + * '?' - matches one character + * If it's matched, return true, else return false. + */ +bool match_wildcard(const char *pattern, const char *str) +{ + const char *s = str; + const char *p = pattern; + bool star = false; + + while (*s) { + switch (*p) { + case '?': + s++; + p++; + break; + case '*': + star = true; + str = s; + if (!*++p) + return true; + pattern = p; + break; + default: + if (*s == *p) { + s++; + p++; + } else { + if (!star) + return false; + str++; + s = str; + p = pattern; + } + break; + } + } + + if (*p == '*') + ++p; + return !*p; +} + +/** * match_strlcpy: - Copy the characters from a substring_t to a sized buffer * @dest: where to copy to * @src: &substring_t to copy @@ -235,5 +285,6 @@ EXPORT_SYMBOL(match_token); EXPORT_SYMBOL(match_int); EXPORT_SYMBOL(match_octal); EXPORT_SYMBOL(match_hex); +EXPORT_SYMBOL(match_wildcard); EXPORT_SYMBOL(match_strlcpy); EXPORT_SYMBOL(match_strdup); |