From fa095a4504cbe668e4244547e2c141597bea4ecf Mon Sep 17 00:00:00 2001 From: Andreas Rottmann Date: Mon, 14 Sep 2009 12:32:44 +0200 Subject: Imported Upstream version 0.9.1 --- lib/unistr/u-strstr.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 lib/unistr/u-strstr.h (limited to 'lib/unistr/u-strstr.h') diff --git a/lib/unistr/u-strstr.h b/lib/unistr/u-strstr.h new file mode 100644 index 0000000..55b5a31 --- /dev/null +++ b/lib/unistr/u-strstr.h @@ -0,0 +1,49 @@ +/* Substring test for UTF-8/UTF-16/UTF-32 strings. + Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc. + Written by Bruno Haible , 2002. + + This program is free software: you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see . */ + +UNIT * +FUNC (const UNIT *haystack, const UNIT *needle) +{ + UNIT first = needle[0]; + + /* Is needle empty? */ + if (first == 0) + return (UNIT *) haystack; + + /* Is needle nearly empty? */ + if (needle[1] == 0) + return U_STRCHR (haystack, first); + + /* Search for needle's first unit. */ + for (; *haystack != 0; haystack++) + if (*haystack == first) + { + /* Compare with needle's remaining units. */ + const UNIT *hptr = haystack + 1; + const UNIT *nptr = needle + 1; + for (;;) + { + if (*hptr != *nptr) + break; + hptr++; nptr++; + if (*nptr == 0) + return (UNIT *) haystack; + } + } + + return NULL; +} -- cgit v1.2.3