diff options
Diffstat (limited to 'media/img_utils/src/FileInput.cpp')
-rw-r--r-- | media/img_utils/src/FileInput.cpp | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/media/img_utils/src/FileInput.cpp b/media/img_utils/src/FileInput.cpp new file mode 100644 index 0000000..e43fd53 --- /dev/null +++ b/media/img_utils/src/FileInput.cpp @@ -0,0 +1,80 @@ +/* + * 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*/ |