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/*
* 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.
*/
#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/FileMap.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) {
FileMap* fileMap = new FileMap();
if (fileMap->create(filePath.string(), fd, 0, sb.st_size, true)) {
char* addr = (char*)fileMap->getDataPtr();
string.append(addr, sb.st_size);
fileMap->release();
}
}
fclose(file);
}
return string;
}
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)) {
FileMap* fileMap = NULL;
fileMap = new FileMap();
if (fileMap->create(filePath.string(), fd, 0, size, false)) {
char* addr = (char*)fileMap->getDataPtr();
memcpy(addr, data.string(), size);
fileMap->release();
}
}
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 offset = lseek(fd, 0, SEEK_END);
if (FAILURE != offset) {
int newEntrySize = data.size();
int fileSize = offset + newEntrySize;
if (FAILURE != ftruncate(fd, fileSize)) {
FileMap* fileMap = NULL;
fileMap = new FileMap();
if (fileMap->create(filePath.string(), fd, offset, fileSize, false)) {
char* addr = (char*)fileMap->getDataPtr();
memcpy(addr, data.string(), data.size());
fileMap->release();
}
}
}
fclose(file);
}
}
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