mirror of https://github.com/akuker/RASCSI.git
104 lines
1.9 KiB
C++
104 lines
1.9 KiB
C++
//---------------------------------------------------------------------------
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//
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// X68000 EMULATOR "XM6"
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//
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// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
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// Copyright (C) 2010-2020 GIMONS
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// [ File I/O (Subset for RaSCSI) ]
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//
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//---------------------------------------------------------------------------
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#include "rasdump/rasdump_fileio.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <cassert>
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Fileio::~Fileio()
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{
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// Safety measure for Release
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Close();
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}
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bool Fileio::Open(const char *fname, OpenMode mode, bool directIO)
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{
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assert(fname);
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assert(handle < 0);
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// Always fail a read from a null array
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if (fname[0] == '\0') {
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handle = -1;
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return false;
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}
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// Default mode
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const mode_t omode = directIO ? O_DIRECT : 0;
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switch (mode) {
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case OpenMode::ReadOnly:
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handle = open(fname, O_RDONLY | omode);
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break;
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case OpenMode::WriteOnly:
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handle = open(fname, O_CREAT | O_WRONLY | O_TRUNC | omode, 0666);
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break;
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case OpenMode::ReadWrite:
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handle = open(fname, O_RDWR | omode);
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break;
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default:
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assert(false);
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break;
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}
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// Evaluate results
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return handle != -1;
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}
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bool Fileio::Open(const char *fname, OpenMode mode)
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{
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return Open(fname, mode, false);
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}
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bool Fileio::Read(uint8_t *buffer, int size) const
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{
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assert(buffer);
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assert(size > 0);
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assert(handle >= 0);
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return read(handle, buffer, size) == size;
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}
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bool Fileio::Write(const uint8_t *buffer, int size) const
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{
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assert(buffer);
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assert(size > 0);
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assert(handle >= 0);
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return write(handle, buffer, size) == size;
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}
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off_t Fileio::GetFileSize() const
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{
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assert(handle >= 0);
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// Get file position in 64bit
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const off_t cur = lseek(handle, 0, SEEK_CUR);
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// Get file size in64bitで
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const off_t end = lseek(handle, 0, SEEK_END);
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// Return to start position
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lseek(handle, cur, SEEK_SET);
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return end;
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}
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void Fileio::Close()
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{
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if (handle != -1) {
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close(handle);
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handle = -1;
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}
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}
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