| //===-- Implementation of memmove -----------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/string/memmove.h" |
| #include "src/string/memory_utils/inline_memcpy.h" |
| #include "src/string/memory_utils/inline_memmove.h" |
| #include <stddef.h> // size_t |
| |
| namespace LIBC_NAMESPACE { |
| |
| LLVM_LIBC_FUNCTION(void *, memmove, |
| (void *dst, const void *src, size_t count)) { |
| // Memmove may handle some small sizes as efficiently as inline_memcpy. |
| // For these sizes we may not do is_disjoint check. |
| // This both avoids additional code for the most frequent smaller sizes |
| // and removes code bloat (we don't need the memcpy logic for small sizes). |
| if (inline_memmove_small_size(dst, src, count)) |
| return dst; |
| if (is_disjoint(dst, src, count)) |
| inline_memcpy(dst, src, count); |
| else |
| inline_memmove_follow_up(dst, src, count); |
| return dst; |
| } |
| |
| } // namespace LIBC_NAMESPACE |
