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/*
* Copyright 2014 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 <img_utils/FileInput.h>
#include <utils/Log.h>
namespace android {
namespace img_utils {
FileInput::FileInput(String8 path) : mFp(NULL), mPath(path), mOpen(false) {}
FileInput::~FileInput() {
if (mOpen) {
ALOGE("%s: FileInput destroyed without calling close!", __FUNCTION__);
close();
}
}
status_t FileInput::open() {
if (mOpen) {
ALOGW("%s: Open called when file %s already open.", __FUNCTION__, mPath.string());
return OK;
}
mFp = ::fopen(mPath, "rb");
if (!mFp) {
ALOGE("%s: Could not open file %s", __FUNCTION__, mPath.string());
return BAD_VALUE;
}
mOpen = true;
return OK;
}
size_t FileInput::read(uint8_t* buf, size_t offset, size_t count, status_t* err) {
if (!mOpen) {
ALOGE("%s: Could not read file %s, file not open.", __FUNCTION__, mPath.string());
if (err != NULL) *err = BAD_VALUE;
return 0;
}
size_t bytesRead = ::fread(buf + offset, sizeof(uint8_t), count, mFp);
int error = ::ferror(mFp);
if (error != 0) {
ALOGE("%s: Error %d occurred while reading file %s.", __FUNCTION__, error, mPath.string());
if (err != NULL) *err = BAD_VALUE;
}
return bytesRead;
}
status_t FileInput::close() {
if(!mOpen) {
ALOGW("%s: Close called when file %s already close.", __FUNCTION__, mPath.string());
return OK;
}
status_t ret = OK;
if(::fclose(mFp) != 0) {
ALOGE("%s: Failed to close file %s.", __FUNCTION__, mPath.string());
ret = BAD_VALUE;
}
mOpen = false;
return OK;
}
} /*namespace img_utils*/
} /*namespace android*/
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