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Diffstat (limited to 'SrcShared/Hardware/TRG/EmTRGDiskIO.cpp')
| -rw-r--r-- | SrcShared/Hardware/TRG/EmTRGDiskIO.cpp | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/SrcShared/Hardware/TRG/EmTRGDiskIO.cpp b/SrcShared/Hardware/TRG/EmTRGDiskIO.cpp new file mode 100644 index 0000000..9b43582 --- /dev/null +++ b/SrcShared/Hardware/TRG/EmTRGDiskIO.cpp @@ -0,0 +1,174 @@ +/* -*- mode: C++; tab-width: 4 -*- */ +/* ===================================================================== *\ + Copyright (c) 2000-2001 Palm, Inc. or its subsidiaries. + All rights reserved. + + This file is part of the Palm OS Emulator. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. +\* ===================================================================== */ + +#include "EmCommon.h" +#include "EmTRGDiskIO.h" + +/************************************************************************ + * This class handles the generic low level disk access. + ************************************************************************/ +#include <stdio.h> + +#include "EmCommon.h" +#include "EmTRGDiskIO.h" + +#define CFFILE_NAME "trgdrv.dat" +#define SDFILE_NAME "trgdrvsd.dat" + +#define SECTOR_SIZE 512 + + +EmTRGDiskIO::EmTRGDiskIO() +{ + m_driveNo = UNKNOWN_DRIVE; +} + + +EmTRGDiskIO::~EmTRGDiskIO() +{ +} + + +char * EmTRGDiskIO::GetFilePath(int driveNo) +{ +#if PLATFORM_WINDOWS + static char tmp[MAX_PATH]; + + if (driveNo == CF_DRIVE) + _snprintf(tmp, sizeof(tmp), "%s\\%s", getenv("WINDIR"), CFFILE_NAME); + else + _snprintf(tmp, sizeof(tmp), "%s\\%s", getenv("WINDIR"), SDFILE_NAME); + return(tmp); +#else + if (driveNo == CF_DRIVE) + return CFFILE_NAME; + else + return SDFILE_NAME; +#endif +} + +int EmTRGDiskIO::Format(void) +{ + EmSector *buffer; + uint32 num, lba; + FILE *fp; + + fp = fopen(GetFilePath(m_driveNo), "wb"); + if (fp == NULL) + return -1; + + buffer = new EmSector; + num = m_currDisk.GetNumSectors(m_diskTypeID); + for (lba=0; lba<num; lba++) + { + m_currDisk.GetSector(m_diskTypeID, lba, buffer); + + // The most probable error condition is + // attempting to write to a full drive ... it could also + // be write-protected, or on a disconnected network drive. + if (fwrite(buffer, SECTOR_SIZE, 1, fp) == 0) + { + delete buffer; + fclose(fp); + return -1; + } + } + delete buffer; + + return 0; +} + +int EmTRGDiskIO::Read(uint32 sectorNum, void *buffer) +{ + FILE *fp; + + if ((fp = fopen(GetFilePath(m_driveNo), "rb")) == NULL) + return -1; + + if (fseek(fp, sectorNum * SECTOR_SIZE, SEEK_SET) == -1) + { + fclose(fp); + return -1; + } + + if (fread(buffer, SECTOR_SIZE, 1, fp) != 1) + { + fclose(fp); + return -1; + } + fclose(fp); + + return 0; +} + +int EmTRGDiskIO::Write(uint32 sectorNum, void *buffer) +{ + FILE *fp; + + if ((fp = fopen(GetFilePath(m_driveNo), "r+b")) == NULL) + return -1; + + if (fseek(fp, sectorNum * SECTOR_SIZE, SEEK_SET) == -1) + { + fclose(fp); + return -1; + } + + if (fwrite(buffer, SECTOR_SIZE, 1, fp) != 1) + { + fclose(fp); + return -1; + } + fclose(fp); + + return 0; +} + + +void EmTRGDiskIO::Initialize(EmDiskTypeID DiskTypeID, int driveNo) +{ + m_diskTypeID = DiskTypeID; + m_driveNo = driveNo; +} + +void EmTRGDiskIO::Dispose(void) +{ +} + +int EmTRGDiskIO::ReadSector(uint32 sectorNum, void *buffer) +{ + int retval; + + if ((retval = Read(sectorNum, buffer)) != 0) + { + Format(); + retval = Read(sectorNum, buffer); + } + + return retval; +} + + + +int EmTRGDiskIO::WriteSector(uint32 sectorNum, void *buffer) +{ + int retval; + + if ((retval = Write(sectorNum, buffer)) != 0) + { + Format(); + retval = Write(sectorNum, buffer); + } + + return retval; +} |