| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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. |
| |
| #include "kudu/util/memory/overwrite.h" |
| |
| #include "kudu/gutil/strings/stringpiece.h" |
| |
| #include <string.h> |
| #include <glog/logging.h> |
| namespace kudu { |
| |
| void OverwriteWithPattern(char* p, size_t len, StringPiece pattern) { |
| size_t pat_len = pattern.size(); |
| CHECK_LT(0, pat_len); |
| size_t rem = len; |
| const char *pat_ptr = pattern.data(); |
| |
| for (; rem >= pat_len; rem -= pat_len) { |
| memcpy(p, pat_ptr, pat_len); |
| p += pat_len; |
| } |
| |
| for (; rem > 0; rem--) { |
| *p++ = *pat_ptr++; |
| } |
| } |
| |
| } // namespace kudu |