linux-kernel - Re: [PATCH v3] string.h: Add str_has

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 21 Dec 2018 19:06:29 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joe Perches <joe@...ches.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Tom Zanussi <zanussi@...nel.org>
Subject: Re: [PATCH v3] string.h: Add str_has_prefix() helper

On Fri, 21 Dec 2018 18:13:16 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> +static __always_inline int str_has_prefix(const char *str, const char *prefix)

I'm thinking it is cleaner to have two helper functions and have them
both return bool.

static __always_inline bool str_has_prefix(const char *str, const char *prefix)
{
	return !strncmp(str, prefix, strlen(prefix));
}

( I still like to keep the __always_inline, it doesn't hurt )

And I'll make a separate patch that adds:

static __always_inline bool
str_has_prefix_len(const char *str, const char *prefix, unsigned int *len)
{
	*len = strlen(prefix);
	return !strncmp(str, prefix, *len) ? *len : 0;
}

Everyone OK with that?

-- Steve