| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "ReadWriteUtils" |
| #include <utils/Log.h> |
| |
| #include <ReadWriteUtils.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <utils/String8.h> |
| |
| using namespace android; |
| |
| #define FAILURE (-1) |
| |
| String8 ReadWriteUtils::readBytes(const String8& filePath) { |
| FILE* file = NULL; |
| file = fopen(filePath.string(), "r"); |
| |
| String8 string(""); |
| if (NULL != file) { |
| int fd = fileno(file); |
| struct stat sb; |
| |
| if (fstat(fd, &sb) == 0 && sb.st_size > 0) { |
| off64_t length = sb.st_size; |
| char* bytes = new char[length]; |
| if (length == read(fd, (void*) bytes, length)) { |
| string.append(bytes, length); |
| } |
| delete[] bytes; |
| } |
| fclose(file); |
| } |
| return string; |
| } |
| |
| int ReadWriteUtils::readBytes(const String8& filePath, char** buffer) { |
| FILE* file = NULL; |
| file = fopen(filePath.string(), "r"); |
| off64_t length = 0; |
| |
| if (NULL != file) { |
| int fd = fileno(file); |
| struct stat sb; |
| |
| if (fstat(fd, &sb) == 0 && sb.st_size > 0) { |
| length = sb.st_size; |
| *buffer = new char[length]; |
| if (length != read(fd, (void*) *buffer, length)) { |
| length = FAILURE; |
| } |
| } |
| fclose(file); |
| } |
| return length; |
| } |
| |
| void ReadWriteUtils::writeToFile(const String8& filePath, const String8& data) { |
| FILE* file = NULL; |
| file = fopen(filePath.string(), "w+"); |
| |
| if (NULL != file) { |
| int fd = fileno(file); |
| |
| int size = data.size(); |
| if (FAILURE != ftruncate(fd, size)) { |
| if (size != write(fd, data.string(), size)) { |
| ALOGE("Failed to write the data to: %s", filePath.string()); |
| } |
| } |
| fclose(file); |
| } |
| } |
| |
| void ReadWriteUtils::appendToFile(const String8& filePath, const String8& data) { |
| FILE* file = NULL; |
| file = fopen(filePath.string(), "a+"); |
| |
| if (NULL != file) { |
| int fd = fileno(file); |
| |
| int size = data.size(); |
| if (size != write(fd, data.string(), size)) { |
| ALOGE("Failed to write the data to: %s", filePath.string()); |
| } |
| fclose(file); |
| } |
| } |
| |