| /* |
| * 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; |
| } |
| |
| ssize_t FileInput::read(uint8_t* buf, size_t offset, size_t count) { |
| if (!mOpen) { |
| ALOGE("%s: Could not read file %s, file not open.", __FUNCTION__, mPath.string()); |
| return BAD_VALUE; |
| } |
| |
| 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()); |
| return BAD_VALUE; |
| } |
| |
| // End of file reached |
| if (::feof(mFp) != 0 && bytesRead == 0) { |
| return NOT_ENOUGH_DATA; |
| } |
| |
| 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*/ |