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libata: allow hyphenated pattern ranges 

Enable use of hyphenated pattern ranges in glob_match(), similar to how
shell globbing works, and how developers might expect things to work.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mark Lord 2010-07-05 10:25:45 -04:00 committed by Jeff Garzik
parent 728e0eaf99
commit 2f9e4d16c5
1 changed files with 12 additions and 4 deletions
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16
drivers/ata/libata-core.c
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@ -4283,11 +4283,13 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
* ? matches any single character.
* * matches any run of characters.
* [xyz] matches a single character from the set: x, y, or z.
* [a-d] matches a single character from the range: a, b, c, or d.
* [a-d0-9] matches a single character from either range.
*
* Note: hyphenated ranges [0-9] are _not_ supported here.
* The special characters ?, [, or *, can be matched using a set, eg. [*]
* The special characters ?, [, -, or *, can be matched using a set, eg. [*]
* Behaviour with malformed patterns is undefined, though generally reasonable.
*
* Example patterns: "SD1?", "SD1[012345]", "*R0", SD*1?[012]*xx"
* Example patterns: "SD1?", "SD1[0-5]", "*R0", SD*1?[012]*xx"
*
* This function uses one level of recursion per '*' in pattern.
* Since it calls _nothing_ else, and has _no_ explicit local variables,
@ -4307,7 +4309,13 @@ static int glob_match (const char *text, const char *pattern)
/* Match single char against a '[' bracketed ']' pattern set */
if (!*text || *pattern != '[')
break; /* Not a pattern set */
while (*++pattern && *pattern != ']' && *text != *pattern);
while (*++pattern && *pattern != ']' && *text != *pattern) {
if (*pattern == '-' && *(pattern - 1) != '[')
if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
++pattern;
break;
}
}
if (!*pattern || *pattern == ']')
return 1; /* No match */
while (*pattern && *pattern++ != ']');