From: Jesse Ruffin <joruffin@gmail.com>
To: linux-c-programming@vger.kernel.org
Subject: Re: String comparison for fixed strings
Date: Wed, 15 Aug 2007 14:51:21 -0400 [thread overview]
Message-ID: <200708151451.48929.joruffin@gmail.com> (raw)
In-Reply-To: <9870a8150708150406x6297b877u473bfbbc62949f10@mail.gmail.com>
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If you are only checking for exact equality of a buffer against a string, the memcmp() function may be slightly faster.
if ( memcmp( (const void*) s, (const void*) "ABC", 3 ) == 0 ) {
// equal
} else {
// not equal
}
Jesse Ruffin
On Wednesday 15 August 2007 07:06, KhaOsh wrote:
> Hello everyone,
>
> In terms of speed what the fastest way of doing a strings comparison
> on fixed strings? Using one of those strcmp() functions or doing the
> following:
>
> (Pseudo code)
> "if (s[0] == 0xa && s[1] == 0xb && s[2] == 0xc)" (etc)
> or
> "if (s[0] == 'A' && s[1] == 'B' && s[2[ == 'C')" (etc)
>
> Thanks for your help.
> -
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prev parent reply other threads:[~2007-08-15 18:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-15 11:06 String comparison for fixed strings KhaOsh
2007-08-15 13:18 ` Stephen Kratzer
2007-08-15 14:46 ` Glynn Clements
2007-08-15 17:26 ` Leslie P. Polzer
2007-08-16 1:44 ` Glynn Clements
2007-08-16 7:30 ` Per Jessen
2007-08-16 18:14 ` Glynn Clements
2007-08-17 7:49 ` Per Jessen
2007-08-17 20:22 ` KhaOsh
2007-08-16 1:54 ` Glynn Clements
2007-08-15 18:51 ` Jesse Ruffin [this message]
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