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concat.c
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concat.c
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// Copyright 2017 Open Source Robotics Foundation, Inc.
//
// 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.
#ifdef __cplusplus
extern "C"
{
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rcutils/concat.h"
char *
rcutils_concat(const char * lhs, const char * rhs, const char * delimiter)
{
if (NULL == lhs) {
return NULL;
}
if (NULL == rhs) {
return NULL;
}
size_t lhs_len = strlen(lhs);
size_t rhs_len = strlen(rhs);
size_t del_len = (delimiter) ? strlen(delimiter) : 0;
char * concat = (char *) malloc((lhs_len + rhs_len + del_len + 1) * sizeof(char));
if (NULL == concat) {
return NULL;
}
int n = snprintf(concat, lhs_len + 1, "%s", lhs);
snprintf(concat + n, rhs_len + del_len + 1, "%s%s", (delimiter) ? delimiter : "", rhs);
return concat;
}
#ifdef __cplusplus
}
#endif