| Ruben Brunk | e507721 | 2014-04-28 16:39:12 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <img_utils/FileInput.h> |
| 18 | |
| 19 | #include <utils/Log.h> |
| 20 | |
| 21 | namespace android { |
| 22 | namespace img_utils { |
| 23 | |
| 24 | FileInput::FileInput(String8 path) : mFp(NULL), mPath(path), mOpen(false) {} |
| 25 | |
| 26 | FileInput::~FileInput() { |
| 27 | if (mOpen) { |
| 28 | ALOGE("%s: FileInput destroyed without calling close!", __FUNCTION__); |
| 29 | close(); |
| 30 | } |
| 31 | |
| 32 | } |
| 33 | |
| 34 | status_t FileInput::open() { |
| 35 | if (mOpen) { |
| 36 | ALOGW("%s: Open called when file %s already open.", __FUNCTION__, mPath.string()); |
| 37 | return OK; |
| 38 | } |
| 39 | mFp = ::fopen(mPath, "rb"); |
| 40 | if (!mFp) { |
| 41 | ALOGE("%s: Could not open file %s", __FUNCTION__, mPath.string()); |
| 42 | return BAD_VALUE; |
| 43 | } |
| 44 | mOpen = true; |
| 45 | return OK; |
| 46 | } |
| 47 | |
| 48 | size_t FileInput::read(uint8_t* buf, size_t offset, size_t count, status_t* err) { |
| 49 | if (!mOpen) { |
| 50 | ALOGE("%s: Could not read file %s, file not open.", __FUNCTION__, mPath.string()); |
| 51 | if (err != NULL) *err = BAD_VALUE; |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | size_t bytesRead = ::fread(buf + offset, sizeof(uint8_t), count, mFp); |
| 56 | int error = ::ferror(mFp); |
| 57 | if (error != 0) { |
| 58 | ALOGE("%s: Error %d occurred while reading file %s.", __FUNCTION__, error, mPath.string()); |
| 59 | if (err != NULL) *err = BAD_VALUE; |
| 60 | } |
| 61 | return bytesRead; |
| 62 | } |
| 63 | |
| 64 | status_t FileInput::close() { |
| 65 | if(!mOpen) { |
| 66 | ALOGW("%s: Close called when file %s already close.", __FUNCTION__, mPath.string()); |
| 67 | return OK; |
| 68 | } |
| 69 | |
| 70 | status_t ret = OK; |
| 71 | if(::fclose(mFp) != 0) { |
| 72 | ALOGE("%s: Failed to close file %s.", __FUNCTION__, mPath.string()); |
| 73 | ret = BAD_VALUE; |
| 74 | } |
| 75 | mOpen = false; |
| 76 | return OK; |
| 77 | } |
| 78 | |
| 79 | } /*namespace img_utils*/ |
| 80 | } /*namespace android*/ |