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| author | Dong Du <Dd_nirvana@sjtu.edu.cn> | 2021-07-28 19:15:35 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-08-07 13:10:40 +0300 |
| commit | d244f3dbd6cfd241dc1db611c0325daedfcab9c6 (patch) | |
| tree | 2efab53955b3a7c3d119d051c58b43bc5b3aca5d | |
| parent | e928472e67f86d73c00537dfa6d5cef5d646426d (diff) | |
| download | opensbi-d244f3dbd6cfd241dc1db611c0325daedfcab9c6.tar.xz | |
lib: sbi: Fix bug in strncmp function when count is 0
No need to compare characters when the count turns to 0.
Fix the issue in sbi_strncmp.
Signed-off-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
| -rw-r--r-- | lib/sbi/sbi_string.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sbi/sbi_string.c b/lib/sbi/sbi_string.c index 7805ba4..c87bce9 100644 --- a/lib/sbi/sbi_string.c +++ b/lib/sbi/sbi_string.c @@ -33,6 +33,10 @@ int sbi_strncmp(const char *a, const char *b, size_t count) for (; count > 0 && *a == *b && *a != '\0'; a++, b++, count--) ; + /* No difference till the end */ + if (!count) + return 0; + return *a - *b; } |