/* Simple strspn.
Copyright (C) 2022 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
. */
#include
size_t strspn (const char *str, const char *accept)
{
if (accept[0] == 0)
return 0;
if (accept[1] == 0)
{
const char *p;
for (p = str; *p == accept[0]; p++);
return p - str;
}
unsigned char table[256] = {0};
unsigned char *us;
for (us = (unsigned char*) accept; *us != 0; table[*us++] = 1);
for (us = (unsigned char*) str; table[*us] != 0; us++);
return us - (unsigned char *) str;
}
libc_hidden_builtin_def (strspn)