Author: pfg Date: Sat Jul 12 18:30:35 2014 New Revision: 268573 URL: http://svnweb.freebsd.org/changeset/base/268573
Log: MFC r268272: minor perf enhancement for UTF-8 Reduce some duplicate code. Reference: https://www.illumos.org/issues/628 Obtained from: Illumos Modified: stable/9/lib/libc/locale/utf8.c Directory Properties: stable/9/lib/libc/ (props changed) Modified: stable/9/lib/libc/locale/utf8.c ============================================================================== --- stable/9/lib/libc/locale/utf8.c Sat Jul 12 18:23:35 2014 (r268572) +++ stable/9/lib/libc/locale/utf8.c Sat Jul 12 18:30:35 2014 (r268573) @@ -1,4 +1,5 @@ /*- + * Copyright 2011 Nexenta Systems, Inc. All rights reserved. * Copyright (c) 2002-2004 Tim J. Robbins * All rights reserved. * @@ -112,13 +113,6 @@ _UTF8_mbrtowc(wchar_t * __restrict pwc, /* Incomplete multibyte sequence */ return ((size_t)-2); - if (us->want == 0 && ((ch = (unsigned char)*s) & ~0x7f) == 0) { - /* Fast path for plain ASCII characters. */ - if (pwc != NULL) - *pwc = ch; - return (ch != '\0' ? 1 : 0); - } - if (us->want == 0) { /* * Determine the number of octets that make up this character @@ -134,10 +128,12 @@ _UTF8_mbrtowc(wchar_t * __restrict pwc, */ ch = (unsigned char)*s; if ((ch & 0x80) == 0) { - mask = 0x7f; - want = 1; - lbound = 0; - } else if ((ch & 0xe0) == 0xc0) { + /* Fast path for plain ASCII characters. */ + if (pwc != NULL) + *pwc = ch; + return (ch != '\0' ? 1 : 0); + } + if ((ch & 0xe0) == 0xc0) { mask = 0x1f; want = 2; lbound = 0x80; @@ -309,12 +305,6 @@ _UTF8_wcrtomb(char * __restrict s, wchar /* Reset to initial shift state (no-op) */ return (1); - if ((wc & ~0x7f) == 0) { - /* Fast path for plain ASCII characters. */ - *s = (char)wc; - return (1); - } - /* * Determine the number of octets needed to represent this character. * We always output the shortest sequence possible. Also specify the @@ -322,8 +312,9 @@ _UTF8_wcrtomb(char * __restrict s, wchar * about the sequence length. */ if ((wc & ~0x7f) == 0) { - lead = 0; - len = 1; + /* Fast path for plain ASCII characters. */ + *s = (char)wc; + return (1); } else if ((wc & ~0x7ff) == 0) { lead = 0xc0; len = 2; _______________________________________________ svn-src-stable-9@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-stable-9 To unsubscribe, send any mail to "svn-src-stable-9-unsubscr...@freebsd.org"
