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87 lines
1.7 KiB
87 lines
1.7 KiB
4 months ago
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/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <algorithm>
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#include "diskio.h"
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using namespace std;
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int DiskIO::OpenForRead(const unsigned char* data, size_t size) {
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this->data = data;
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this->size = size;
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this->off = 0;
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this->isOpen = 1;
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this->openForWrite = 0;
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return 1;
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}
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void DiskIO::MakeRealName(void) {
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realFilename = userFilename;
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}
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int DiskIO::OpenForRead(void) {
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return 1;
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}
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int DiskIO::OpenForWrite(void) {
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return 1;
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}
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void DiskIO::Close(void) {
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}
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int DiskIO::GetBlockSize(void) {
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return 512;
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}
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int DiskIO::GetPhysBlockSize(void) {
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return 512;
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}
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uint32_t DiskIO::GetNumHeads(void) {
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return 255;
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}
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uint32_t DiskIO::GetNumSecsPerTrack(void) {
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return 63;
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}
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int DiskIO::DiskSync(void) {
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return 1;
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}
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int DiskIO::Seek(uint64_t sector) {
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off_t off = sector * GetBlockSize();
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if (off >= this->size) {
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return 0;
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} else {
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this->off = off;
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return 1;
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}
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}
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int DiskIO::Read(void* buffer, int numBytes) {
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int actualBytes = std::min(static_cast<int>(this->size - this->off), numBytes);
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memcpy(buffer, this->data + this->off, actualBytes);
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return actualBytes;
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}
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int DiskIO::Write(void*, int) {
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return 0;
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}
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uint64_t DiskIO::DiskSize(int *) {
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return this->size / GetBlockSize();
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}
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