65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*
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* Copyright 2012, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sys/stat.h>
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#include <stdlib.h>
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#include "bcinfo/Wrap/file_wrapper_input.h"
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FileWrapperInput::FileWrapperInput(const char* name) :
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_name(name), _at_eof(false), _size_found(false), _size(0) {
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_file = fopen(name, "rb");
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if (_file == nullptr) {
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fprintf(stderr, "Unable to open: %s\n", name);
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exit(1);
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}
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}
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FileWrapperInput::~FileWrapperInput() {
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fclose(_file);
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}
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size_t FileWrapperInput::Read(uint8_t* buffer, size_t wanted) {
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size_t found = fread((char*) buffer, 1, wanted, _file);
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if (feof(_file) || ferror(_file)) {
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_at_eof = true;
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}
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return found;
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}
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bool FileWrapperInput::AtEof() {
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return _at_eof;
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}
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off_t FileWrapperInput::Size() {
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if (_size_found) return _size;
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struct stat st;
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if (stat(_name, &st) == 0) {
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_size_found = true;
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_size = st.st_size;
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return _size;
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} else {
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fprintf(stderr, "Unable to compute file size: %s\n", _name);
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exit(1);
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}
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// NOT REACHABLE.
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return 0;
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}
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bool FileWrapperInput::Seek(uint32_t pos) {
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return fseek(_file, (long) pos, SEEK_SET) == 0; // NOLINT
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}
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