/* * Copyright 2024 Google LLC * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /////////////////////////////////////// // Implements: // char *strcat(char *s1, const char *s2); // char *strncat(char *s1, const char *s2, size_t n); /////////////////////////////////////// // Notes: // Tuned for code size. #include char *strcat(char * restrict s1, const char * restrict s2) { char *rc = s1; s1 += strlen(s1); strcpy(s1, s2); return rc; } char *strncat(char * restrict s1, const char * restrict s2, size_t n) { char * rc = s1; s1 += strlen(s1); size_t strn = strlen(s2); if (strn > n) { strn = n; } memcpy(s1, s2, strn); s1[strn] = '\0'; return rc; }