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misc: Add cast in grub_strncasecmp() to drop sign when calling grub_tolower()

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Note this cast was fixed in grub_strcasecmp() in commit ce41ab7aab
(* grub-core/kern/misc.c (grub_strcmp): Use unsigned comparison as per
common usage and preffered in several parts of code.), but this commit
omitted fixing it in grub_strncasecmp().

Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Glenn Washburn 2022-08-11 12:48:42 -05:00 committed by Daniel Kiper
parent 995a745c28
commit 13fb5af10c
1 changed files with 2 additions and 1 deletions
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3
include/grub/misc.h
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@ -232,7 +232,8 @@ grub_strncasecmp (const char *s1, const char *s2, grub_size_t n)
while (*s1 && *s2 && --n)
{
if (grub_tolower (*s1) != grub_tolower (*s2))
if (grub_tolower ((grub_uint8_t) *s1)
!= grub_tolower ((grub_uint8_t) *s2))
break;
s1++;