/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
* Jonathan Schleifer <js@heap.zone>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <assert.h>
#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 "OFString.h"
#import "OFLocalization.h"
#import "OFDataArray.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFNotOpenException.h"
#import "OFOpenItemFailedException.h"
#import "OFOutOfRangeException.h"
#import "OFReadFailedException.h"
#import "OFSeekFailedException.h"
#import "OFWriteFailedException.h"
#ifdef OF_WINDOWS
# include <windows.h>
#endif
#ifdef OF_WII
# define BOOL OGC_BOOL
# include <fat.h>
# undef BOOL
#endif
#ifdef OF_NINTENDO_DS
# include <stdbool.h>
# include <filesystem.h>
#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_MORPHOS
# define closeHandle(h) close(h)
#else
static OFDataArray *openHandles = nil;
static void
closeHandle(of_file_handle_t handle)
{
if (handle.index != SIZE_MAX) {
BPTR *handles = [openHandles items];
size_t count = [openHandles count];
assert(handles[handle.index] == handle.handle);
handles[handle.index] = handles[count - 1];
[openHandles removeItemAtIndex: count - 1];
}
Close(handle.handle);
}
OF_DESTRUCTOR()
{
BPTR *handles = [openHandles items];
size_t count = [openHandles count];
for (size_t i = 0; i < count; i++)
Close(handles[i]);
}
#endif
#ifndef OF_MORPHOS
static int
parseMode(const char *mode)
{
if (strcmp(mode, "r") == 0)
return O_RDONLY;
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, "a") == 0)
return O_WRONLY | O_CREAT | O_APPEND;
if (strcmp(mode, "rb") == 0)
return O_RDONLY | O_BINARY;
if (strcmp(mode, "wb") == 0)
return O_WRONLY | O_CREAT | O_TRUNC | O_BINARY;
if (strcmp(mode, "wbx") == 0)
return O_WRONLY | O_CREAT | O_EXCL | O_EXLOCK;
if (strcmp(mode, "ab") == 0)
return O_WRONLY | O_CREAT | O_APPEND | O_BINARY;
if (strcmp(mode, "r+") == 0)
return O_RDWR;
if (strcmp(mode, "w+") == 0)
return O_RDWR | O_CREAT | O_TRUNC;
if (strcmp(mode, "a+") == 0)
return O_RDWR | O_CREAT | O_APPEND;
if (strcmp(mode, "r+b") == 0 || strcmp(mode, "rb+") == 0)
return O_RDWR | O_BINARY;
if (strcmp(mode, "w+b") == 0 || strcmp(mode, "wb+") == 0)
return O_RDWR | O_CREAT | O_TRUNC | O_BINARY;
if (strcmp(mode, "w+bx") == 0 || strcmp(mode, "wb+x") == 0)
return O_RDWR | O_CREAT | O_EXCL | O_EXLOCK;
if (strcmp(mode, "ab+") == 0 || strcmp(mode, "a+b") == 0)
return O_RDWR | O_CREAT | O_APPEND | O_BINARY;
return -1;
}
#else
static int
parseMode(const char *mode, bool *append)
{
*append = false;
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, "a") == 0) {
*append = true;
return MODE_READWRITE;
}
if (strcmp(mode, "rb") == 0)
return MODE_OLDFILE;
if (strcmp(mode, "wb") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "wbx") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "ab") == 0) {
*append = true;
return MODE_READWRITE;
}
if (strcmp(mode, "r+") == 0)
return MODE_OLDFILE;
if (strcmp(mode, "w+") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "a+") == 0) {
*append = true;
return MODE_READWRITE;
}
if (strcmp(mode, "r+b") == 0 || strcmp(mode, "rb+") == 0)
return MODE_OLDFILE;
if (strcmp(mode, "w+b") == 0 || strcmp(mode, "wb+") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "w+bx") == 0 || strcmp(mode, "wb+x") == 0)
return MODE_NEWFILE;
if (strcmp(mode, "ab+") == 0 || strcmp(mode, "a+b") == 0) {
*append = true;
return MODE_READWRITE;
}
return -1;
}
#endif
@implementation OFFile
+ (void)initialize
{
if (self != [OFFile class])
return;
#ifdef OF_MORPHOS
openHandles = [[OFDataArray alloc] initWithItemSize: sizeof(BPTR)];
#endif
#ifdef OF_WII
if (!fatInitDefault())
@throw [OFInitializationFailedException
exceptionWithClass: self];
#endif
#ifdef OF_NINTENDO_DS
if (!nitroFSInit(NULL))
@throw [OFInitializationFailedException
exceptionWithClass: self];
#endif
}
+ (instancetype)fileWithPath: (OFString *)path
mode: (OFString *)mode
{
return [[[self alloc] initWithPath: path
mode: mode] autorelease];
}
+ (instancetype)fileWithHandle: (of_file_handle_t)handle
{
return [[[self alloc] initWithHandle: handle] autorelease];
}
- init
{
OF_INVALID_INIT_METHOD
}
- initWithPath: (OFString *)path
mode: (OFString *)mode
{
of_file_handle_t handle;
@try {
void *pool = objc_autoreleasePoolPush();
int flags;
#ifndef OF_MORPHOS
if ((flags = parseMode([mode UTF8String])) == -1)
@throw [OFInvalidArgumentException exception];
flags |= O_CLOEXEC;
# if defined(OF_WINDOWS)
if ((handle = _wopen([path UTF16String], flags,
_S_IREAD | _S_IWRITE)) == -1)
# elif defined(OF_HAVE_OFF64_T)
if ((handle = open64([path cStringWithEncoding:
[OFLocalization encoding]], flags, 0666)) == -1)
# else
if ((handle = open([path cStringWithEncoding:
[OFLocalization encoding]], flags, 0666)) == -1)
# endif
@throw [OFOpenItemFailedException
exceptionWithPath: path
mode: mode
errNo: errno];
#else
handle.index = SIZE_MAX;
if ((flags = parseMode([mode UTF8String],
&handle.append)) == -1)
@throw [OFInvalidArgumentException exception];
if ((handle.handle = Open([path cStringWithEncoding:
[OFLocalization 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];
}
[openHandles addItem: &handle.handle];
handle.index = [openHandles count] - 1;
if (handle.append) {
if (Seek64(handle.handle, 0, OFFSET_END) == -1) {
closeHandle(handle);
@throw [OFOpenItemFailedException
exceptionWithPath: path
mode: mode
errNo: EIO];
}
}
#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;
}
- initWithHandle: (of_file_handle_t)handle
{
self = [super init];
_handle = handle;
return self;
}
- (bool)lowlevelIsAtEndOfStream
{
if (!OF_FILE_HANDLE_IS_VALID(_handle))
@throw [OFNotOpenException exceptionWithObject: self];
return _atEndOfStream;
}
- (size_t)lowlevelReadIntoBuffer: (void *)buffer
length: (size_t)length
{
ssize_t ret;
if (!OF_FILE_HANDLE_IS_VALID(_handle))
@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_MORPHOS)
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;
}
- (void)lowlevelWriteBuffer: (const void *)buffer
length: (size_t)length
{
if (!OF_FILE_HANDLE_IS_VALID(_handle))
@throw [OFNotOpenException exceptionWithObject: self];
#if defined(OF_WINDOWS)
if (length > INT_MAX)
@throw [OFOutOfRangeException exception];
if (write(_handle, buffer, (int)length) != (int)length)
@throw [OFWriteFailedException exceptionWithObject: self
requestedLength: length
errNo: errno];
#elif defined(OF_MORPHOS)
if (length > LONG_MAX)
@throw [OFOutOfRangeException exception];
if (_handle.append) {
if (Seek64(_handle.handle, 0, OFFSET_END) == -1)
@throw [OFWriteFailedException
exceptionWithObject: self
requestedLength: length
errNo: EIO];
}
if (Write(_handle.handle, (void *)buffer, length) != (LONG)length)
@throw [OFWriteFailedException exceptionWithObject: self
requestedLength: length
errNo: EIO];
#else
if (length > SSIZE_MAX)
@throw [OFOutOfRangeException exception];
if (write(_handle, buffer, length) != (ssize_t)length)
@throw [OFWriteFailedException exceptionWithObject: self
requestedLength: length
errNo: errno];
#endif
}
- (of_offset_t)lowlevelSeekToOffset: (of_offset_t)offset
whence: (int)whence
{
of_offset_t ret;
if (!OF_FILE_HANDLE_IS_VALID(_handle))
@throw [OFNotOpenException exceptionWithObject: self];
#ifndef OF_MORPHOS
# if defined(OF_WINDOWS)
ret = _lseeki64(_handle, offset, whence);
# elif defined(OF_HAVE_OFF64_T)
ret = lseek64(_handle, offset, whence);
# else
ret = lseek(_handle, offset, whence);
# endif
if (ret == -1)
@throw [OFSeekFailedException exceptionWithStream: self
offset: offset
whence: whence
errNo: errno];
#else
switch (whence) {
case SEEK_SET:
ret = Seek64(_handle.handle, offset, OFFSET_BEGINNING);
break;
case SEEK_CUR:
ret = Seek64(_handle.handle, offset, OFFSET_CURRENT);
break;
case SEEK_END:
ret = Seek64(_handle.handle, offset, OFFSET_END);
break;
default:
ret = -1;
break;
}
if (ret == -1)
@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 (OF_FILE_HANDLE_IS_VALID(_handle))
closeHandle(_handle);
_handle = OF_INVALID_FILE_HANDLE;
[super close];
}
- (void)dealloc
{
[self close];
[super dealloc];
}
@end