diff options
Diffstat (limited to 'string/strspn.c')
-rw-r--r-- | string/strspn.c | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/string/strspn.c b/string/strspn.c deleted file mode 100644 index c63197cdf0..0000000000 --- a/string/strspn.c +++ /dev/null @@ -1,76 +0,0 @@ -/* Copyright (C) 1991-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library 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 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <string.h> -#include <stdint.h> -#include <libc-pointer-arith.h> - -#undef strspn -#ifndef STRSPN -# define STRSPN strspn -#endif - -/* Return the length of the maximum initial segment - of S which contains only characters in ACCEPT. */ -size_t -STRSPN (const char *str, const char *accept) -{ - if (accept[0] == '\0') - return 0; - if (__glibc_unlikely (accept[1] == '\0')) - { - const char *a = str; - for (; *str == *accept; str++); - return str - a; - } - - /* Use multiple small memsets to enable inlining on most targets. */ - unsigned char table[256]; - unsigned char *p = memset (table, 0, 64); - memset (p + 64, 0, 64); - memset (p + 128, 0, 64); - memset (p + 192, 0, 64); - - unsigned char *s = (unsigned char*) accept; - /* Different from strcspn it does not add the NULL on the table - so can avoid check if str[i] is NULL, since table['\0'] will - be 0 and thus stopping the loop check. */ - do - p[*s++] = 1; - while (*s); - - s = (unsigned char*) str; - if (!p[s[0]]) return 0; - if (!p[s[1]]) return 1; - if (!p[s[2]]) return 2; - if (!p[s[3]]) return 3; - - s = (unsigned char *) PTR_ALIGN_DOWN (s, 4); - - unsigned int c0, c1, c2, c3; - do { - s += 4; - c0 = p[s[0]]; - c1 = p[s[1]]; - c2 = p[s[2]]; - c3 = p[s[3]]; - } while ((c0 & c1 & c2 & c3) != 0); - - size_t count = s - (unsigned char *) str; - return (c0 & c1) == 0 ? count + c0 : count + c2 + 2; -} -libc_hidden_builtin_def (strspn) |