From e1908ae95dd4c9d19ee4dfabfc8bf8a7f85943fe Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 18:58:41 +0200 Subject: Adding upstream version 9.4. Signed-off-by: Daniel Baumann --- lib/mbschr.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 lib/mbschr.c (limited to 'lib/mbschr.c') diff --git a/lib/mbschr.c b/lib/mbschr.c new file mode 100644 index 0000000..330e3f1 --- /dev/null +++ b/lib/mbschr.c @@ -0,0 +1,53 @@ +/* Searching a string for a character. + Copyright (C) 2007-2023 Free Software Foundation, Inc. + Written by Bruno Haible , 2007. + + This file 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 file 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 . */ + +#include + +/* Specification. */ +#include + +#include "mbuiterf.h" + +/* Locate the first single-byte character C in the character string STRING, + and return a pointer to it. Return NULL if C is not found in STRING. */ +char * +mbschr (const char *string, int c) +{ + if (MB_CUR_MAX > 1 + /* Optimization: We know that ASCII characters < 0x30 don't occur as + part of multibyte characters longer than 1 byte. Hence, if c < 0x30, + the faster unibyte loop can be used. */ + && (unsigned char) c >= 0x30) + { + mbuif_state_t state; + const char *iter; + for (mbuif_init (state), iter = string;; ) + { + if (!mbuif_avail (state, iter)) + goto notfound; + mbchar_t cur = mbuif_next (state, iter); + if (mb_len (cur) == 1 && (unsigned char) *iter == (unsigned char) c) + break; + iter += mb_len (cur); + } + return (char *) iter; + notfound: + return NULL; + } + else + return strchr (string, c); +} -- cgit v1.2.3