| 17 | namespace LIBC_NAMESPACE_DECL { |
| 18 | |
| 19 | LLVM_LIBC_FUNCTION(size_t, strspn, (const char *src, const char *segment)) { |
| 20 | LIBC_CRASH_ON_NULLPTR(src); |
| 21 | LIBC_CRASH_ON_NULLPTR(segment); |
| 22 | const char *initial = src; |
| 23 | cpp::bitset<256> bitset; |
| 24 | |
| 25 | for (; *segment; ++segment) |
| 26 | bitset.set(*reinterpret_cast<const unsigned char *>(segment)); |
| 27 | for (; *src && bitset.test(*reinterpret_cast<const unsigned char *>(src)); |
| 28 | ++src) |
| 29 | ; |
| 30 | return src - initial; |
| 31 | } |
| 32 | |
| 33 | } // namespace LIBC_NAMESPACE_DECL |