/*
* Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3.0 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3.0 along with this program. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#ifndef _LARGEFILE64_SOURCE
# define _LARGEFILE64_SOURCE 1
#endif
#include <errno.h>
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#include "unistd_wrapper.h"
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#import "OFFile.h"
#import "OFLocale.h"
#import "OFString.h"
#import "OFSystemInfo.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFNotOpenException.h"
#import "OFOpenItemFailedException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "OFReadFailedException.h"
#import "OFSeekFailedException.h"
#import "OFWriteFailedException.h"
#ifdef OF_WINDOWS
# include <windows.h>
#endif
#ifdef OF_AMIGAOS
# define Class IntuitionClass
# include <proto/exec.h>
# include <proto/dos.h>
# undef Class
#endif
#ifdef OF_WII
# include <fat.h>
#endif
#ifdef OF_NINTENDO_DS
# include <stdbool.h>
# include <filesystem.h>
#endif
#ifdef OF_NINTENDO_SWITCH
# define id nx_id
# include <switch.h>
# undef id
#endif
#ifndef O_BINARY
# define O_BINARY 0
#endif
#ifndef O_CLOEXEC
# define O_CLOEXEC 0
#endif
#ifndef O_EXCL
# define O_EXCL 0
#endif
#ifndef O_EXLOCK
# define O_EXLOCK 0
#endif
#ifndef OF_AMIGAOS
# define closeHandle(h) close(h)
#else
static struct _OFFileHandle {
struct _OFFileHandle *previous, *next;
BPTR handle;
bool append;
} *firstHandle = NULL;
static void
closeHandle(OFFileHandle handle)
{
Close(handle->handle);
Forbid();
if (handle->previous != NULL)
handle->previous->next = handle->next;
if (handle->next != NULL)
handle->next->previous = handle->previous;
if (firstHandle == handle)
firstHandle = handle->next;
Permit();
OFFreeMemory(handle);
}
OF_DESTRUCTOR()
{
for (OFFileHandle iter = firstHandle; iter != NULL;
iter = iter->next)
Close(iter->handle);
}
#endif
#ifndef OF_AMIGAOS
static int
parseMode(const char *mode)
{
if (strcmp(mode, "r") == 0)
return O_RDONLY;
if (strcmp(mode, "r+") == 0)
return O_RDWR;
if (strcmp(mode, "w") == 0)
return O_WRONLY | O_CREAT | O_TRUNC;
if (strcmp(mode, "wx") == 0)
return O_WRONLY | O_CREAT | O_EXCL | O_EXLOCK;
if (strcmp(mode, "w+") == 0)
return O_RDWR | O_CREAT | O_TRUNC;
if (strcmp(mode, "w+x") == 0)
return O_RDWR | O_CREAT | O_EXCL | O_EXLOCK;
if (strcmp(mode, "a") == 0)
return O_WRONLY | O_CREAT | O_APPEND;
if (strcmp(mode, "a+") == 0)
return O_RDWR | O_CREAT | O_APPEND;
return -1;
}
#else
static int
parseMode(const char *mode, bool *append)
{
*append = false;
if (strcmp(mode, "r") == 0)
return MODE_OLDFILE;
if (strcmp(mode, "r+") == 0)
return MODE_OLDFILE;
if (strcmp(mode, "w") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "wx") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "w+") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "w+x") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "a") == 0) {
*append = true;
return MODE_READWRITE;
}
if (strcmp(mode, "a+") == 0) {
*append = true;
return MODE_READWRITE;
}
return -1;
}
#endif
@implementation OFFile
+ (void)initialize
{
if (self != [OFFile class])
return;
#ifdef OF_WII
if (!fatInitDefault())
@throw [OFInitializationFailedException
exceptionWithClass: self];
#endif
#ifdef OF_NINTENDO_DS
if (!nitroFSInit(NULL))
@throw [OFInitializationFailedException
exceptionWithClass: self];
#endif
#ifdef OF_NINTENDO_SWITCH
if (R_SUCCEEDED(romfsInit()))
/*
* Errors are intentionally ignored, as it's possible we just
* have no romfs.
*/
atexit((void (*)(void))romfsExit);
#endif
}
+ (instancetype)fileWithPath: (OFString *)path mode: (OFString *)mode
{
return [[[self alloc] initWithPath: path mode: mode] autorelease];
}
+ (instancetype)fileWithHandle: (OFFileHandle)handle
{
return [[[self alloc] initWithHandle: handle] autorelease];
}
- (instancetype)initWithPath: (OFString *)path mode: (OFString *)mode
{
OFFileHandle handle;
@try {
void *pool = objc_autoreleasePoolPush();
int flags;
#ifndef OF_AMIGAOS
if ((flags = parseMode(mode.UTF8String)) == -1)
@throw [OFInvalidArgumentException exception];
flags |= O_BINARY | O_CLOEXEC;
# ifdef OF_WINDOWS
if ([OFSystemInfo isWindowsNT])
handle = _wopen(path.UTF16String, flags,
_S_IREAD | _S_IWRITE);
else
# endif
# ifdef HAVE_OPEN64
handle = open64(
[path cStringWithEncoding: [OFLocale encoding]],
flags, 0666);
# else
handle = open(
[path cStringWithEncoding: [OFLocale encoding]],
flags, 0666);
# endif
if (handle == -1)
@throw [OFOpenItemFailedException
exceptionWithPath: path
mode: mode
errNo: errno];
#else
handle = OFAllocMemory(1, sizeof(*handle));
@try {
if ((flags = parseMode(mode.UTF8String,
&handle->append)) == -1)
@throw [OFInvalidArgumentException exception];
if ((handle->handle = Open([path cStringWithEncoding:
[OFLocale encoding]], flags)) == 0) {
int errNo;
switch (IoErr()) {
case ERROR_OBJECT_IN_USE:
case ERROR_DISK_NOT_VALIDATED:
errNo = EBUSY;
break;
case ERROR_OBJECT_NOT_FOUND:
errNo = ENOENT;
break;
case ERROR_DISK_WRITE_PROTECTED:
errNo = EROFS;
break;
case ERROR_WRITE_PROTECTED:
case ERROR_READ_PROTECTED:
errNo = EACCES;
break;
default:
errNo = 0;
break;
}
@throw [OFOpenItemFailedException
exceptionWithPath: path
mode: mode
errNo: errNo];
}
if (handle->append) {
# if defined(OF_MORPHOS)
if (Seek64(handle->handle, 0,
OFFSET_END) == -1) {
# elif defined(OF_AMIGAOS4)
if (ChangeFilePosition(handle->handle, 0,
OFFSET_END) == -1) {
# else
if (Seek(handle->handle, 0, OFFSET_END) == -1) {
# endif
Close(handle->handle);
@throw [OFOpenItemFailedException
exceptionWithPath: path
mode: mode
errNo: EIO];
}
}
Forbid();
handle->previous = NULL;
handle->next = firstHandle;
if (firstHandle != NULL)
firstHandle->previous = handle;
firstHandle = handle;
Permit();
} @catch (id e) {
OFFreeMemory(handle);
@throw e;
}
#endif
objc_autoreleasePoolPop(pool);
} @catch (id e) {
[self release];
@throw e;
}
@try {
self = [self initWithHandle: handle];
} @catch (id e) {
closeHandle(handle);
@throw e;
}
return self;
}
- (instancetype)initWithHandle: (OFFileHandle)handle
{
self = [super init];
_handle = handle;
_initialized = true;
return self;
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (bool)lowlevelIsAtEndOfStream
{
if (_handle == OFInvalidFileHandle)
@throw [OFNotOpenException exceptionWithObject: self];
return _atEndOfStream;
}
- (size_t)lowlevelReadIntoBuffer: (void *)buffer length: (size_t)length
{
ssize_t ret;
if (_handle == OFInvalidFileHandle)
@throw [OFNotOpenException exceptionWithObject: self];
#if defined(OF_WINDOWS)
if (length > UINT_MAX)
@throw [OFOutOfRangeException exception];
if ((ret = read(_handle, buffer, (unsigned int)length)) < 0)
@throw [OFReadFailedException exceptionWithObject: self
requestedLength: length
errNo: errno];
#elif defined(OF_AMIGAOS)
if (length > LONG_MAX)
@throw [OFOutOfRangeException exception];
if ((ret = Read(_handle->handle, buffer, length)) < 0)
@throw [OFReadFailedException exceptionWithObject: self
requestedLength: length
errNo: EIO];
#else
if ((ret = read(_handle, buffer, length)) < 0)
@throw [OFReadFailedException exceptionWithObject: self
requestedLength: length
errNo: errno];
#endif
if (ret == 0)
_atEndOfStream = true;
return ret;
}
- (size_t)lowlevelWriteBuffer: (const void *)buffer length: (size_t)length
{
if (_handle == OFInvalidFileHandle)
@throw [OFNotOpenException exceptionWithObject: self];
#if defined(OF_WINDOWS)
int bytesWritten;
if (length > INT_MAX)
@throw [OFOutOfRangeException exception];
if ((bytesWritten = write(_handle, buffer, (int)length)) < 0)
@throw [OFWriteFailedException exceptionWithObject: self
requestedLength: length
bytesWritten: 0
errNo: errno];
#elif defined(OF_AMIGAOS)
LONG bytesWritten;
if (length > LONG_MAX)
@throw [OFOutOfRangeException exception];
if (_handle->append) {
# if defined(OF_MORPHOS)
if (Seek64(_handle->handle, 0, OFFSET_END) == -1)
# elif defined(OF_AMIGAOS4)
if (ChangeFilePosition(_handle->handle, 0, OFFSET_END) == -1)
# else
if (Seek(_handle->handle, 0, OFFSET_END) == -1)
# endif
@throw [OFWriteFailedException
exceptionWithObject: self
requestedLength: length
bytesWritten: 0
errNo: EIO];
}
if ((bytesWritten = Write(_handle->handle, (void *)buffer, length)) < 0)
@throw [OFWriteFailedException exceptionWithObject: self
requestedLength: length
bytesWritten: 0
errNo: EIO];
#else
ssize_t bytesWritten;
if (length > SSIZE_MAX)
@throw [OFOutOfRangeException exception];
if ((bytesWritten = write(_handle, buffer, length)) < 0)
@throw [OFWriteFailedException exceptionWithObject: self
requestedLength: length
bytesWritten: 0
errNo: errno];
#endif
return (size_t)bytesWritten;
}
- (OFStreamOffset)lowlevelSeekToOffset: (OFStreamOffset)offset
whence: (OFSeekWhence)whence
{
OFStreamOffset ret;
if (_handle == OFInvalidFileHandle)
@throw [OFNotOpenException exceptionWithObject: self];
#ifndef OF_AMIGAOS
int translatedWhence;
switch (whence) {
case OFSeekSet:
translatedWhence = SEEK_SET;
break;
case OFSeekCurrent:
translatedWhence = SEEK_CUR;
break;
case OFSeekEnd:
translatedWhence = SEEK_END;
break;
default:
@throw [OFSeekFailedException exceptionWithStream: self
offset: offset
whence: whence
errNo: EINVAL];
}
# if defined(OF_WINDOWS)
ret = _lseeki64(_handle, offset, translatedWhence);
# elif defined(HAVE_LSEEK64)
ret = lseek64(_handle, offset, translatedWhence);
# else
ret = lseek(_handle, offset, translatedWhence);
# endif
if (ret == -1)
@throw [OFSeekFailedException exceptionWithStream: self
offset: offset
whence: whence
errNo: errno];
#else
LONG translatedWhence;
switch (whence) {
case OFSeekSet:
translatedWhence = OFFSET_BEGINNING;
break;
case OFSeekCurrent:
translatedWhence = OFFSET_CURRENT;
break;
case OFSeekEnd:
translatedWhence = OFFSET_END;
break;
default:
@throw [OFSeekFailedException exceptionWithStream: self
offset: offset
whence: whence
errNo: EINVAL];
}
# if defined(OF_MORPHOS)
if ((ret = Seek64(_handle->handle, offset, translatedWhence)) == 1)
# elif defined(OF_AMIGAOS4)
if ((ret = ChangeFilePosition(_handle->handle, offset,
translatedWhence)) == 1)
# else
if ((ret = Seek(_handle->handle, offset, translatedWhence)) == 1)
# endif
@throw [OFSeekFailedException exceptionWithStream: self
offset: offset
whence: whence
errNo: EINVAL];
#endif
_atEndOfStream = false;
return ret;
}
#ifdef OF_FILE_HANDLE_IS_FD
- (int)fileDescriptorForReading
{
return _handle;
}
- (int)fileDescriptorForWriting
{
return _handle;
}
#endif
- (void)close
{
if (_handle == OFInvalidFileHandle)
@throw [OFNotOpenException exceptionWithObject: self];
closeHandle(_handle);
_handle = OFInvalidFileHandle;
[super close];
}
- (void)dealloc
{
if (_initialized && _handle != OFInvalidFileHandle)
[self close];
[super dealloc];
}
@end