Date: Thu, 17 Dec 2009 21:10:04 GMT From: Maxim Zakharov <maxime@maxime.net.ru> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/141682: [libc] [patch] Faster version of strncpy(3) Message-ID: <200912172110.nBHLA4r3096739@freefall.freebsd.org>
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The following reply was made to PR kern/141682; it has been noted by GNATS.
From: Maxim Zakharov <maxime@maxime.net.ru>
To: bug-followup@FreeBSD.org, maxime@maxime.net.ru
Cc:
Subject: Re: kern/141682: [libc] [patch] Faster version of strncpy(3)
Date: Thu, 17 Dec 2009 23:46:03 +0300
Sorry, it seems one line was redundant:
void * dps_strncpy(char *dst0, char *src0, size_t length) {
if (length) {
register size_t n = (length + 7) / 8;
register size_t r = (length % 8);
register char *dst = dst0, *src = src0;
if (r == 0) r = 8;
if (!(dst[0] = src[0])) return dst0;
if (r > 1) if (!(dst[1] = src[1])) return dst0;
if (r > 2) if (!(dst[2] = src[2])) return dst0;
if (r > 3) if (!(dst[3] = src[3])) return dst0;
if (r > 4) if (!(dst[4] = src[4])) return dst0;
if (r > 5) if (!(dst[5] = src[5])) return dst0;
if (r > 6) if (!(dst[6] = src[6])) return dst0;
if (r > 7) if (!(dst[7] = src[7])) return dst0;
src += r; dst += r;
while (--n > 0) {
if (!(dst[0] = src[0])) break;
if (!(dst[1] = src[1])) break;
if (!(dst[2] = src[2])) break;
if (!(dst[3] = src[3])) break;
if (!(dst[4] = src[4])) break;
if (!(dst[5] = src[5])) break;
if (!(dst[6] = src[6])) break;
if (!(dst[7] = src[7])) break;
src += 8; dst += 8;
}
}
return dst0;
}
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