/* * 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 #include 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*/