Messages in this thread | ![/](/images/icornerl.gif) | | From | Linus Torvalds <> | Date | Fri, 21 Dec 2018 14:29:30 -0800 | Subject | Re: [for-next][PATCH 23/24] string.h: Add strncmp_prefix() helper macro |
| |
On Fri, Dec 21, 2018 at 2:20 PM Joe Perches <joe@perches.com> wrote: > > Using > > static inline bool str_has_prefix(const char *str, const char prefix[]) > { > return !strncmp(str, prefix, strlen(prefix)); > } > > eliminates the strlen with gcc 4.8 (oldest I still have)
Ok, that looks like the right thing to do.
Side note: in the kernel we disable the whole "unsigned vs signed" pointer warning entirely, exactly because of the "char *" vs "unsigned char *" problem.
Linus
| ![\](/images/icornerr.gif) |