1*71db0c75SAndroid Build Coastguard Worker //===-- Implementation of strspn ------------------------------------------===// 2*71db0c75SAndroid Build Coastguard Worker // 3*71db0c75SAndroid Build Coastguard Worker // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*71db0c75SAndroid Build Coastguard Worker // See https://llvm.org/LICENSE.txt for license information. 5*71db0c75SAndroid Build Coastguard Worker // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*71db0c75SAndroid Build Coastguard Worker // 7*71db0c75SAndroid Build Coastguard Worker //===----------------------------------------------------------------------===// 8*71db0c75SAndroid Build Coastguard Worker 9*71db0c75SAndroid Build Coastguard Worker #include "src/string/strspn.h" 10*71db0c75SAndroid Build Coastguard Worker 11*71db0c75SAndroid Build Coastguard Worker #include "src/__support/CPP/bitset.h" 12*71db0c75SAndroid Build Coastguard Worker #include "src/__support/common.h" 13*71db0c75SAndroid Build Coastguard Worker #include "src/__support/macros/config.h" 14*71db0c75SAndroid Build Coastguard Worker #include <stddef.h> 15*71db0c75SAndroid Build Coastguard Worker 16*71db0c75SAndroid Build Coastguard Worker namespace LIBC_NAMESPACE_DECL { 17*71db0c75SAndroid Build Coastguard Worker 18*71db0c75SAndroid Build Coastguard Worker LLVM_LIBC_FUNCTION(size_t, strspn, (const char *src, const char *segment)) { 19*71db0c75SAndroid Build Coastguard Worker const char *initial = src; 20*71db0c75SAndroid Build Coastguard Worker cpp::bitset<256> bitset; 21*71db0c75SAndroid Build Coastguard Worker 22*71db0c75SAndroid Build Coastguard Worker for (; *segment; ++segment) 23*71db0c75SAndroid Build Coastguard Worker bitset.set(*reinterpret_cast<const unsigned char *>(segment)); 24*71db0c75SAndroid Build Coastguard Worker for (; *src && bitset.test(*reinterpret_cast<const unsigned char *>(src)); 25*71db0c75SAndroid Build Coastguard Worker ++src) 26*71db0c75SAndroid Build Coastguard Worker ; 27*71db0c75SAndroid Build Coastguard Worker return src - initial; 28*71db0c75SAndroid Build Coastguard Worker } 29*71db0c75SAndroid Build Coastguard Worker 30*71db0c75SAndroid Build Coastguard Worker } // namespace LIBC_NAMESPACE_DECL 31