2 * @copyright Copyright (c) 2016-2020 TOYOTA MOTOR CORPORATION.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <sys/types.h>
21 strlcat(char *dst, const char *src, size_t size)
23 size_t dstsize, srcsize, copysize;
25 dstsize = strnlen(dst, size);
26 srcsize = strlen(src);
27 if (dstsize == size) {
28 return dstsize + srcsize;
31 copysize = size - dstsize - 1;
32 if (srcsize < copysize) {
36 memcpy(dst + dstsize, src, copysize);
37 dst[dstsize + copysize] = '\0';
39 return dstsize + srcsize;