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profuse
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git-svn-id: https://profuse.googlecode.com/svn/branches/v2@214 aa027e90-d47c-11dd-86d7-074df07e0730

This commit is contained in:
ksherlock 2010-05-18 02:58:26 +00:00
parent 33f209690e
commit bcf6cd3890
13 changed files with 381 additions and 231 deletions
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77
Device/Adaptor.cpp Normal file
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@ -0,0 +1,77 @@
#include <cstring>
#include <Device/Adaptor.h>
using namespace Device;
Adaptor::~Adaptor()
{
}
POAdaptor::POAdaptor(void *address)
{
_address = (uint8_t *)address;
}
void POAdaptor::readBlock(unsigned block, void *bp)
{
std::memcpy(bp, _address + block * 512, 512);
}
void POAdaptor::writeBlock(unsigned block, const void *bp)
{
std::memcpy(_address + block * 512, bp, 512);
}
unsigned DOAdaptor::Map[] = {
0x00, 0x0e, 0x0d, 0x0c,
0x0b, 0x0a, 0x09, 0x08,
0x07, 0x06, 0x05, 0x04,
0x03, 0x02, 0x01, 0x0f
};
DOAdaptor::DOAdaptor(void *address)
{
_address = (uint8_t *)address;
}
void DOAdaptor::readBlock(unsigned block, void *bp)
{
unsigned track = (block & ~0x07) << 9;
unsigned sector = (block & 0x07) << 1;
for (unsigned i = 0; i < 2; ++i)
{
size_t offset = track | (Map[sector+i] << 8);
std::memcpy(bp, _address + offset, 256);
bp = (uint8_t *)bp + 256;
}
}
void DOAdaptor::writeBlock(unsigned block, const void *bp)
{
unsigned track = (block & ~0x07) << 9;
unsigned sector = (block & 0x07) << 1;
for (unsigned i = 0; i < 2; ++i)
{
size_t offset = track | (Map[sector+i] << 8);
std::memcpy(_address + offset, bp, 256);
bp = (uint8_t *)bp + 256;
}
}

45
Device/Adaptor.h Normal file
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@ -0,0 +1,45 @@
#ifndef __DEVICE_ADAPTOR_H__
#define __DEVICE_ADAPTOR_H__
#include <stdint.h>
namespace Device {
class Adaptor
{
public:
virtual ~Adaptor();
virtual void readBlock(unsigned block, void *bp) = 0;
virtual void writeBlock(unsigned block, const void *bp) = 0;
};
class POAdaptor : public Adaptor
{
public:
POAdaptor(void *address);
void readBlock(unsigned block, void *bp);
void writeBlock(unsigned block, const void *bp);
private:
uint8_t *_address;
};
class DOAdaptor : public Adaptor
{
public:
DOAdaptor(void *address);
void readBlock(unsigned block, void *bp);
void writeBlock(unsigned block, const void *bp);
private:
uint8_t *_address;
static unsigned Map[];
};
// TODO -- nibble adaptor.
}
#endif

26
Device/DavexDiskImage.cpp
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@ -8,7 +8,8 @@
#include <algorithm>
#include <Device/DavexDiskImage.h>
#include <Device/MappedFile.h>
#include <File/MappedFile.h>
#include <Device/Adaptor.h>
#include <Endian/Endian.h>
#include <Endian/IOBuffer.h>
@ -26,16 +27,21 @@ using ProFUSE::POSIXException;
static const char *IdentityCheck = "\x60VSTORE [Davex]\x00";
/*
DavexDiskImage::DavexDiskImage(const char *name, bool readOnly) :
DiskImage(name, readOnly)
{
Validate(file());
}
*/
// private, validation already performed.
DavexDiskImage::DavexDiskImage(MappedFile *f) :
DiskImage(f)
DavexDiskImage::DavexDiskImage(MappedFile *file) :
DiskImage(file)
{
// 512-bytes header
setBlocks((file->length() / 512) - 1);
setAdaptor(new POAdaptor(512 + (uint8_t *)file->address()));
}
@ -49,8 +55,8 @@ void DavexDiskImage::Validate(MappedFile *f)
#undef __METHOD__
#define __METHOD__ "DavexDiskImage::Validate"
size_t size = f->fileSize();
const void * data = f->fileData();
size_t size = f->length();
const void * data = f->address();
bool ok = false;
unsigned blocks = (size / 512) - 1;
@ -80,10 +86,6 @@ void DavexDiskImage::Validate(MappedFile *f)
if (!ok)
throw Exception(__METHOD__ ": Invalid file format.");
f->reset();
f->setBlocks(blocks);
f->setOffset(512);
}
DavexDiskImage *DavexDiskImage::Open(MappedFile *file)
@ -111,7 +113,7 @@ DavexDiskImage *DavexDiskImage::Create(const char *name, size_t blocks, const ch
MappedFile *file = new MappedFile(name, blocks * 512 + 512);
data = (uint8_t *)file->fileData();
data = (uint8_t *)file->address();
header.writeBytes(IdentityCheck, 16);
// file Format
@ -152,10 +154,8 @@ DavexDiskImage *DavexDiskImage::Create(const char *name, size_t blocks, const ch
header.setOffset(512, true);
std::memcpy(file->fileData(), header.buffer(), 512);
std::memcpy(file->address(), header.buffer(), 512);
file->sync();
file->setOffset(512);
file->setBlocks(blocks);
return new DavexDiskImage(file);
}

5
Device/DavexDiskImage.h
View File

@ -4,6 +4,8 @@
#include <string>
#include <Device/BlockDevice.h>
#include <Device/DiskImage.h>
namespace Device {
@ -12,7 +14,6 @@ namespace Device {
class DavexDiskImage : public DiskImage {
public:
DavexDiskImage(const char *, bool readOnly);
virtual ~DavexDiskImage();
static DavexDiskImage *Create(const char *name, size_t blocks);
@ -22,6 +23,8 @@ public:
private:
DavexDiskImage(const char *, bool readOnly);
DavexDiskImage(MappedFile *);
static void Validate(MappedFile *);

58
Device/DiskCopy42Image.cpp
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@ -5,7 +5,6 @@
#include <algorithm>
#include <Device/DiskCopy42Image.h>
#include <Device/MappedFile.h>
#include <Endian/Endian.h>
#include <Endian/IOBuffer.h>
@ -17,32 +16,45 @@ using namespace BigEndian;
using ProFUSE::Exception;
using ProFUSE::POSIXException;
enum {
oDataSize = 64,
oDataChecksum = 72,
oPrivate = 82,
oUserData = 84
};
DiskCopy42Image::DiskCopy42Image(MappedFile *f) :
DiskImage(f),
_changed(false)
{
setAdaptor(new POAdaptor(oUserData + (uint8_t *)f->address()));
setBlocks(Read32(f->address(), oDataSize) / 512);
}
/*
DiskCopy42Image::DiskCopy42Image(const char *name, bool readOnly) :
DiskImage(name, readOnly),
_changed(false)
{
Validate(file());
}
*/
DiskCopy42Image::~DiskCopy42Image()
{
if (_changed)
{
MappedFile *f = file();
void *data = f->fileData();
if (f)
{
uint32_t cs = Checksum(f->offset() + (uint8_t *)data,
f->blocks() * 512);
void *data = f->address();
uint32_t cs = Checksum(oUserData + (uint8_t *)data, Read32(data, oDataSize));
Write32(data, 72, cs);
Write32(data, oDataChecksum, cs);
f->sync();
}
// TODO -- checksum
@ -100,12 +112,12 @@ DiskCopy42Image *DiskCopy42Image::Create(const char *name, size_t blocks)
DiskCopy42Image *DiskCopy42Image::Create(const char *name, size_t blocks, const char *vname)
{
MappedFile *file = new MappedFile(name, blocks * 512 + 84);
file->setOffset(84);
file->setBlocks(blocks);
MappedFile *file = new MappedFile(name, blocks * 512 + oUserData);
uint8_t tmp[84];
IOBuffer header(tmp, 84);
uint8_t tmp[oUserData];
IOBuffer header(tmp, oUserData);
// name -- 64byte pstring.
@ -115,7 +127,7 @@ DiskCopy42Image *DiskCopy42Image::Create(const char *name, size_t blocks, const
header.writeBytes(vname, std::min(l, 63u));
//header.resize(64);
header.setOffset(64, true);
header.setOffset(oDataSize, true);
// data size -- number of bytes
header.write32(blocks * 512);
@ -152,7 +164,7 @@ DiskCopy42Image *DiskCopy42Image::Create(const char *name, size_t blocks, const
// private
header.write16(0x100);
std::memcpy(file->fileData(), header.buffer(), 84);
std::memcpy(file->address(), header.buffer(), oUserData);
file->sync();
return new DiskCopy42Image(file);
@ -164,29 +176,29 @@ void DiskCopy42Image::Validate(MappedFile *file)
#define __METHOD__ "DiskCopy42Image::Validate"
size_t bytes = 0;
size_t size = file->fileSize();
const void *data = file->fileData();
size_t size = file->length();
const void *data = file->address();
bool ok = false;
uint32_t checksum = 0;
do {
if (size < 84) break;
if (size < oUserData) break;
// name must be < 64
if (Read8(data, 0) > 63) break;
if (Read32(data, 82) != 0x100)
if (Read32(data, oPrivate) != 0x100)
break;
// bytes, not blocks.
bytes = Read32(data, 64);
bytes = Read32(data, oDataSize);
if (bytes % 512) break;
if (size < 84 + bytes) break;
if (size < oUserData + bytes) break;
// todo -- checksum.
checksum = Read32(data, 72);
checksum = Read32(data, oDataChecksum);
ok = true;
} while (false);
@ -194,15 +206,13 @@ void DiskCopy42Image::Validate(MappedFile *file)
if (!ok)
throw Exception(__METHOD__ ": Invalid file format.");
uint32_t cs = Checksum(64 + (uint8_t *)data, bytes);
uint32_t cs = Checksum(oUserData + (uint8_t *)data, bytes);
if (cs != checksum)
{
fprintf(stderr, "Warning: checksum invalid.\n");
fprintf(stderr, __METHOD__ ": Warning: checksum invalid.\n");
}
file->reset();
file->setOffset(64);
file->setBlocks(bytes / 512);
}
void DiskCopy42Image::write(unsigned block, const void *bp)

4
Device/DiskCopy42Image.h
View File

@ -2,6 +2,7 @@
#define __DISKCOPY42IMAGE_H__
#include <Device/BlockDevice.h>
#include <Device/DiskImage.h>
#include <stdint.h>
@ -9,7 +10,6 @@ namespace Device {
class DiskCopy42Image : public DiskImage {
public:
DiskCopy42Image(const char *name, bool readOnly);
virtual ~DiskCopy42Image();
static DiskCopy42Image *Create(const char *name, size_t blocks);
@ -24,6 +24,8 @@ public:
private:
DiskCopy42Image(const char *name, bool readOnly);
DiskCopy42Image(MappedFile *);
static void Validate(MappedFile *);
bool _changed;

203
Device/DiskImage.cpp
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@ -9,7 +9,7 @@
#include <Device/DiskImage.h>
#include <MappedFile.h>
#include <File/MappedFile.h>
#include <ProFUSE/Exception.h>
@ -20,96 +20,6 @@ using ProFUSE::Exception;
using ProFUSE::POSIXException;
class Reader {
public:
virtual ~Reader();
virtual void readBlock(unsigned block, void *bp) = 0;
virtual void writeBlock(unsigned block, const void *bp) = 0;
};
class POReader : public Reader {
public:
POReader(void *address);
void readBlock(unsigned block, void *bp);
void writeBlock(unsigned block, const void *bp);
private:
uint8_t *_address;
};
class DOReader : public Reader {
public
DOReader(void *address);
void readBlock(unsigned block, void *bp);
void writeBlock(unsigned block, const void *bp);
private:
uint8_t *_address;
static unsigned Map[];
}
Reader::~Reader()
{
}
unsigned DOReader::Map[] = {
0x00, 0x0e, 0x0d, 0x0c,
0x0b, 0x0a, 0x09, 0x08,
0x07, 0x06, 0x05, 0x04,
0x03, 0x02, 0x01, 0x0f
};
POReader::POReader(void *address)
{
_address = (uint8_t *)address;
}
void POReader::readBlock(unsigned block, void *bp)
{
std::memcpy(bp, _address + block * 512, 512);
}
void POReader::writeBlock(unsigned block, const void *bp)
{
std::memcpy(_address + block * 512, bp, 512);
}
DOReader::DOReader(void *address)
{
_address = (uint8_t *)address;
}
void DOReader::readBlock(unsigned block, void *bp)
{
unsigned track = (block & ~0x07) << 9;
unsigned sector = (block & 0x07) << 1;
for (unsigned i = 0; i < 2; ++i)
{
size_t offset = track | (Map[sector+i] << 8);
std::memcpy(bp, _address + offset, 256);
bp = (uint8_t *)bp + 256;
}
}
void DOReader::writeBlock(unsigned block, const void *bp)
{
unsigned track = (block & ~0x07) << 9;
unsigned sector = (block & 0x07) << 1;
for (unsigned i = 0; i < 2; ++i)
{
size_t offset = track | (DOSMap[sector+i] << 8);
std::memcpy(_address + offset, bp, 256);
bp = (uint8_t *)bp + 256;
}
}
@ -161,29 +71,30 @@ unsigned DiskImage::ImageType(const char *type, unsigned defv)
DiskImage::DiskImage(const char *name, bool readOnly) :
_file(name, readOnly)
DiskImage::DiskImage(const char *name, bool readOnly)
{
_offset = 0;
File fd(name, readOnly ? O_RDONLY : O_RDWR);
MappedFile mf(fd, readOnly);
_file.adopt(mf);
_blocks = 0;
_readOnly = readOnly;
_address = file.address();
_adaptor = NULL;
}
DiskImage::DiskImage(MappedFile *file, bool readOnly)
{
_file.adopt(file);
_offset = 0;
DiskImage::DiskImage(MappedFile *file)
{
_file.adopt(*file);
_blocks = 0;
_readOnly = readOnly;
_address = file.address();
_readOnly = file->readOnly();
_adaptor = NULL;
}
DiskImage::~DiskImage()
{
delete _file;
delete _adaptor;
}
bool DiskImage::readOnly()
@ -197,57 +108,65 @@ unsigned DiskImage::blocks()
}
void DiskImage::setAdaptor(Adaptor *adaptor)
{
delete _adaptor;
_adaptor = adaptor;
}
void DiskImage::read(unsigned block, void *bp)
{
#undef __METHOD__
#define __METHOD__ "DiskImage::read"
if (block >= _blocks)
throw Exception(__METHOD__ ": Invalid block.");
_adaptor->readBlock(block, bp);
}
void DiskImage::write(unsigned block, const void *bp)
{
#undef __METHOD__
#define __METHOD__ "DiskImage::write"
if (block >= _blocks)
throw Exception(__METHOD__ ": Invalid block.");
_adaptor->writeBlock(block, bp);
}
void DiskImage::sync()
{
#undef __METHOD__
#define __METHOD__ "DiskImage::sync"
if (_file) return _file.sync();
if (_file.isValid()) return _file.sync();
throw Exception(__METHOD__ ": File not set.");
}
void DiskImage::readPO(unsigned block, void *bp)
{
#undef __METHOD__
#define __METHOD__ "DiskImage::readPO"
if (block >= _blocks)
throw Exception(__METHOD__ ": Invalid block.");
std::memcpy(bp, (uint8_t *)_address + block * 512, 512);
}
void DiskImage::writePO(unsigned block, const void *bp)
{
#undef __METHOD__
#define __METHOD__ "DiskImage::writePO"
if (block >= _blocks)
throw Exception(__METHOD__ ": Invalid block.");
std::memcpy((uint8_t *)_address + block * 512, bp, 512);
}
/*
ProDOSOrderDiskImage::ProDOSOrderDiskImage(const char *name, bool readOnly) :
DiskImage(name, readOnly)
{
Validate(file());
}
*/
ProDOSOrderDiskImage::ProDOSOrderDiskImage(MappedFile *file) :
DiskImage(file)
{
setBlocks(file->length() / 512);
setAdaptor(new POAdaptor(file->address()));
}
ProDOSOrderDiskImage *ProDOSOrderDiskImage::Create(const char *name, size_t blocks)
{
MappedFile *file = new MappedFile(name, blocks * 512);
file->setBlocks(blocks);
MappedFile *file = MappedFile::Create(name, blocks * 512);
return new ProDOSOrderDiskImage(file);
}
@ -262,33 +181,34 @@ void ProDOSOrderDiskImage::Validate(MappedFile *f)
#undef __METHOD__
#define __METHOD__ "ProDOSOrderDiskImage::Validate"
if (!f) throw Exception(__METHOD__ ": File not set.");
if (!f || !f->isValid()) throw Exception(__METHOD__ ": File not set.");
size_t size = f->fileSize();
size_t size = f->length();
if (size % 512)
throw Exception(__METHOD__ ": Invalid file format.");
f->reset();
f->setBlocks(size / 512);
}
/*
DOSOrderDiskImage::DOSOrderDiskImage(const char *name, bool readOnly) :
DiskImage(name, readOnly)
{
Validate(file());
}
*/
DOSOrderDiskImage::DOSOrderDiskImage(MappedFile *file) :
DiskImage(file)
{
setBlocks(file->length() / 512);
setAdaptor(new DOAdaptor(file->address()));
}
DOSOrderDiskImage *DOSOrderDiskImage::Create(const char *name, size_t blocks)
{
MappedFile *file = new MappedFile(name, blocks * 512);
file->setEncoding(MappedFile::DOSOrder);
file->setBlocks(blocks);
MappedFile *file = MappedFile::Create(name, blocks * 512);
return new DOSOrderDiskImage(file);
}
@ -303,14 +223,11 @@ void DOSOrderDiskImage::Validate(MappedFile *f)
#undef __METHOD__
#define __METHOD__ "DOSOrderDiskImage::Validate"
if (!f) throw Exception(__METHOD__ ": File not set.");
if (!f || !f->isValid()) throw Exception(__METHOD__ ": File not set.");
size_t size = f->fileSize();
size_t size = f->length();
if (size % 512)
throw Exception(__METHOD__ ": Invalid file format.");
f->reset();
f->setEncoding(MappedFile::DOSOrder);
f->setBlocks(size / 512);
}

35
Device/DiskImage.h
View File

@ -8,11 +8,13 @@
#include <Device/BlockDevice.h>
#include <MappedFile.h>
#include <Device/Adaptor.h>
#include <File/MappedFile.h>
namespace Device {
class DiskImage : public BlockDevice {
public:
@ -30,27 +32,21 @@ public:
protected:
DiskImage(MappedFile * = 0);
DiskImage(MappedFile *file = 0);
DiskImage(const char *name, bool readOnly);
void setOffset(uint32_t offset);
void *address() const { return _address; }
void *base() const { return _file.address(); }
void readPO(unsigned block, void *bp);
void writePO(unsigned block, const void *bp);
void readDO(unsigned block, void *bp);
void writeDO(unsigned block, const void *bp);
// readNib
// writeNib
void setBlocks(unsigned blocks) { _blocks = blocks; }
void setAdaptor(Adaptor *);
void *address() const { return _file.address(); }
MappedFile *file() { return &_file; }
private:
MappedFile _file;
void *_address;
uint32_t _offset;
Adaptor *_adaptor;
bool _readOnly;
unsigned _blocks;
@ -60,12 +56,14 @@ private:
class ProDOSOrderDiskImage : public DiskImage {
public:
ProDOSOrderDiskImage(const char *name, bool readOnly);
static ProDOSOrderDiskImage *Create(const char *name, size_t blocks);
static ProDOSOrderDiskImage *Open(MappedFile *);
private:
ProDOSOrderDiskImage(const char *name, bool readOnly);
ProDOSOrderDiskImage(MappedFile *);
static void Validate(MappedFile *);
};
@ -73,12 +71,13 @@ private:
class DOSOrderDiskImage : public DiskImage {
public:
DOSOrderDiskImage(const char *name, bool readOnly);
static DOSOrderDiskImage *Create(const char *name, size_t blocks);
static DOSOrderDiskImage *Open(MappedFile *);
private:
DOSOrderDiskImage(const char *name, bool readOnly);
DOSOrderDiskImage(MappedFile *);
static void Validate(MappedFile *);
};

32
Device/UniversalDiskImage.cpp
View File

@ -1,5 +1,4 @@
#include <Device/UniversalDiskImage.h>
#include <Device/MappedFile.h>
#include <Endian/Endian.h>
#include <Endian/IOBuffer.h>
@ -12,6 +11,7 @@ using namespace LittleEndian;
using ProFUSE::Exception;
using ProFUSE::POSIXException;
/*
UniversalDiskImage::UniversalDiskImage(const char *name, bool readOnly) :
DiskImage(name, readOnly)
{
@ -21,11 +21,26 @@ UniversalDiskImage::UniversalDiskImage(const char *name, bool readOnly) :
// flags. bit 31 = locked.
_flags = Read32(data, 0x10);
}
*/
UniversalDiskImage::UniversalDiskImage(MappedFile *file) :
DiskImage(file)
{
_flags = 0;
unsigned blocks;
unsigned offset;
uint8_t * data = (uint8_t *)file->address();
_flags = Read32(data, 0x10);
offset = Read32(data, 0x20);
blocks = Read32(data, 0x14);
setBlocks(blocks);
// TODO -- DO, Nibble support.
setAdaptor(new POAdaptor(offset + data));
}
UniversalDiskImage *UniversalDiskImage::Create(const char *name, size_t blocks)
@ -65,11 +80,9 @@ UniversalDiskImage *UniversalDiskImage::Create(const char *name, size_t blocks)
// comment offset, creator, reserved -- 0.
header.setOffset(64, true);
std::memcpy(file->fileData(), header.buffer(), 64);
std::memcpy(file->address(), header.buffer(), 64);
file->setOffset(64);
file->setBlocks(blocks);
return new UniversalDiskImage(file);
}
@ -90,8 +103,8 @@ void UniversalDiskImage::Validate(MappedFile *file)
#undef __METHOD__
#define __METHOD__ "UniversalDiskImage::Validate"
const void *data = file->fileData();
size_t size = file->fileSize();
const void *data = file->address();
size_t size = file->length();
bool ok = false;
unsigned blocks = 0;
unsigned offset = 0;
@ -103,6 +116,7 @@ void UniversalDiskImage::Validate(MappedFile *file)
if (std::memcmp(data, "2IMG", 4)) break;
// only prodos supported, for now...
// TODO -- Dos Order, Nibble support.
if (Read32(data, 0x0c) != 1) break;
offset = Read32(data, 0x20);
@ -119,9 +133,7 @@ void UniversalDiskImage::Validate(MappedFile *file)
if (!ok)
throw Exception(__METHOD__ ": Invalid file format.");
file->reset();
file->setOffset(offset);
file->setBlocks(blocks);
}

6
Device/UniversalDiskImage.h
View File

@ -3,13 +3,14 @@
#include <Device/BlockDevice.h>
#include <Device/DiskImage.h>
#include <stdint.h>
namespace Device {
class UniversalDiskImage : public DiskImage {
public:
UniversalDiskImage(const char *name, bool readOnly);
static UniversalDiskImage *Create(const char *name, size_t blocks);
static UniversalDiskImage *Open(MappedFile *);
@ -17,6 +18,9 @@ public:
virtual bool readOnly();
private:
UniversalDiskImage(const char *name, bool readOnly);
UniversalDiskImage(MappedFile *);
static void Validate(MappedFile *);

7
File/File.h
View File

@ -15,8 +15,13 @@ class File {
File(const char *name, int flags);
~File();
bool isValid() const
{
return _fd >= 0;
}
int fd() const { return _fd; }
void close();
void adopt(File &f);

99
File/MappedFile.cpp
View File

@ -13,47 +13,83 @@ MappedFile::MappedFile()
{
_length = -1;
_address = MAP_FAILED;
_readOnly = true;
}
MappedFile::MappedFile(MappedFile &mf)
{
_address = mf._address;
_length = mf._length;
_readOnly = mf._readOnly;
mf._address = MAP_FAILED;
mf._length = -1;
mf._readOnly = true;
}
MappedFile::MappedFile(File f, bool readOnly)
MappedFile::MappedFile(const File &f, bool readOnly, size_t size)
{
#undef __METHOD__
#define __METHOD__ "MappedFile::MappedFile"
_length = -1;
_address = MAP_FAILED;
_readOnly = readOnly;
init(f, readOnly, size);
}
MappedFile::MappedFile(const char *name, bool readOnly)
{
File f(name, readOnly);
_length = -1;
_address = MAP_FAILED;
_readOnly = readOnly;
init(f, readOnly, -1);
}
MappedFile::~MappedFile()
{
close();
}
void MappedFile::init(const File &f, bool readOnly, size_t size)
{
#undef __METHOD__
#define __METHOD__ "MappedFile::init"
struct stat st;
// close enough
if (f.fd() < 0)
throw POSIXException( __METHOD__, EBADF);
if (::fstat(f.fd(), &st) != 0)
throw POSIXException(__METHOD__ ": fstat", errno);
if (!S_ISREG(st.st_mode))
throw POSIXException(__METHOD__, ENODEV);
if (size <= 0)
{
if (::fstat(f.fd(), &st) != 0)
throw POSIXException(__METHOD__ ": fstat", errno);
_length = st.st_size;
if (!S_ISREG(st.st_mode))
throw POSIXException(__METHOD__, ENODEV);
size = st.st_size;
}
_length = size;
_address = ::mmap(0, _length,
readOnly ? PROT_READ : PROT_READ | PROT_WRITE,
MAP_FILE | MAP_SHARED, f.fd(), 0);
readOnly ? PROT_READ : PROT_READ | PROT_WRITE,
MAP_FILE | MAP_SHARED, f.fd(), 0);
if (_address == MAP_FAILED)
throw POSIXException(__METHOD__ ": mmap", errno);
}
MappedFile::~MappedFile()
{
close();
_readOnly = readOnly;
}
@ -70,6 +106,7 @@ void MappedFile::close()
_address = MAP_FAILED;
_length = -1;
_readOnly = true;
if (::munmap(address, length) != 0)
throw POSIXException(__METHOD__ ": munmap", errno);
@ -93,13 +130,39 @@ void MappedFile::adopt(MappedFile &mf)
close();
_address = mf._address;
_length = mf._length;
_readOnly = mf._readOnly;
mf._address = MAP_FAILED;
mf._length = -1;
mf._readOnly = true;
}
void MappedFile::swap(MappedFile &mf)
{
std::swap(_address, mf._address);
std::swap(_length, mf._length);
std::swap(_readOnly, mf._readOnly);
}
static MappedFile *Create(const char *name, size_t size)
{
#undef __METHOD__
#define __METHOD__ "MappedFile::Create"
File fd(::open(name, O_CREAT | O_TRUNC | O_RDWR, 0644));
if (!fd.isValid())
{
throw POSIXException(__METHOD__ ": Unable to create file.", errno);
}
// TODO -- is ftruncate portable?
if (::ftruncate(fd.fd(), size) < 0)
{
// TODO -- unlink?
throw POSIXException(__METHOD__ ": Unable to truncate file.", errno);
}
return new MappedFile(fd, false, size);
}

15
File/MappedFile.h
View File

@ -10,16 +10,26 @@ class MappedFile {
public:
MappedFile();
MappedFile(File f, bool readOnly);
MappedFile(MappedFile&);
MappedFile(const File &f, bool readOnly, size_t size = -1);
MappedFile(const char *name, bool readOnly);
~MappedFile();
static MappedFile *Create(const char *name, size_t size);
bool isValid() const
{
return _address != MAP_FAILED;
}
void sync();
void close();
void *address() const { return _address; }
size_t length() const { return _length; }
bool readOnly() const { return _readOnly; }
void swap(MappedFile &);
void adopt(MappedFile &);
@ -28,8 +38,11 @@ class MappedFile {
MappedFile& operator=(MappedFile &);
void init(const File &f, bool readOnly, size_t size);
void *_address;
size_t _length;
bool _readOnly;
};