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2009-03-30 Pavel Roskin <proski@gnu.org>

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* fs/hfs.c (grub_hfs_strncasecmp): Integrate into ...
	(grub_hfs_cmp_catkeys): ... this.  Don't assume strings to be
	zero-terminated, rely only on the strlen value.  Fix comparison
	of strings differing in length.
This commit is contained in:
proski 2009-03-31 00:22:08 +00:00
parent 92f33540d8
commit 6a003ed1be
2 changed files with 24 additions and 34 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2009-03-30 Pavel Roskin <proski@gnu.org>
* fs/hfs.c (grub_hfs_strncasecmp): Integrate into ...
(grub_hfs_cmp_catkeys): ... this. Don't assume strings to be
zero-terminated, rely only on the strlen value. Fix comparison
of strings differing in length.
2009-03-30 Robert Millan <rmh@aybabtu.com>
* loader/i386/linux.c (grub_cmd_linux): Check for zImage before

47
fs/hfs.c
View file

@ -390,10 +390,10 @@ grub_hfs_mount (grub_disk_t disk)
return 0;
}
/* Case insensitive string comparison using HFS character ordering */
/* Compare the K1 and K2 catalog file keys using HFS character ordering. */
static int
grub_hfs_strncasecmp (const unsigned char *s1, const unsigned char *s2,
grub_size_t n)
grub_hfs_cmp_catkeys (struct grub_hfs_catalog_key *k1,
struct grub_hfs_catalog_key *k2)
{
/* Taken from hfsutils 3.2.6 and converted to a readable form */
static const unsigned char hfs_charorder[256] = {
@ -614,40 +614,23 @@ grub_hfs_strncasecmp (const unsigned char *s1, const unsigned char *s2,
[0xFE] = 214,
[0xFF] = 215,
};
int i;
int cmp;
int minlen = (k1->strlen < k2->strlen) ? k1->strlen : k2->strlen;
if (n == 0)
return 0;
while (*s1 && *s2 && --n)
{
if (hfs_charorder[*s1] != hfs_charorder[*s2])
break;
s1++;
s2++;
}
return (int) hfs_charorder[*s1] - (int) hfs_charorder[*s2];
}
/* Compare the K1 and K2 catalog file keys. */
static int
grub_hfs_cmp_catkeys (struct grub_hfs_catalog_key *k1,
struct grub_hfs_catalog_key *k2)
{
int cmp = (grub_be_to_cpu32 (k1->parent_dir)
- grub_be_to_cpu32 (k2->parent_dir));
cmp = (grub_be_to_cpu32 (k1->parent_dir) - grub_be_to_cpu32 (k2->parent_dir));
if (cmp != 0)
return cmp;
cmp = grub_hfs_strncasecmp (k1->str, k2->str, k1->strlen);
for (i = 0; i < minlen; i++)
{
cmp = (hfs_charorder[k1->str[i]] - hfs_charorder[k2->str[i]]);
if (cmp != 0)
return cmp;
}
/* This is required because the compared strings are not of equal
length. */
if (cmp == 0 && k1->strlen < k2->strlen)
return -1;
return cmp;
/* Shorter strings precede long ones. */
return (k1->strlen - k2->strlen);
}