mirror of
https://github.com/gnustep/libs-base.git
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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/branches/NibCompatibility@22359 72102866-910b-0410-8b05-ffd578937521
3799 lines
85 KiB
Objective-C
3799 lines
85 KiB
Objective-C
/**
|
||
Copyright (C) 1995, 1996, 1997, 2000, 2002 Free Software Foundation, Inc.
|
||
|
||
Written by: Andrew Kachites McCallum <mccallum@gnu.ai.mit.edu>
|
||
Date: March 1995
|
||
Rewritten by: Richard Frith-Macdonald <richard@brainstorm.co.uk>
|
||
Date: September 1997
|
||
|
||
This file is part of the GNUstep Base Library.
|
||
|
||
This library is free software; you can redistribute it and/or
|
||
modify it under the terms of the GNU Library General Public
|
||
License as published by the Free Software Foundation; either
|
||
version 2 of the License, or (at your option) any later version.
|
||
|
||
This library 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
|
||
Library General Public License for more details.
|
||
|
||
You should have received a copy of the GNU Library General Public
|
||
License along with this library; if not, write to the Free
|
||
Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111 USA.
|
||
|
||
<title>NSData class reference</title>
|
||
$Date$ $Revision$
|
||
*/
|
||
|
||
/* NOTES - Richard Frith-Macdonald 1997
|
||
*
|
||
* Rewritten to use the class cluster architecture as in OPENSTEP.
|
||
*
|
||
* NB. In our implementaion we require an extra primitive for the
|
||
* NSMutableData subclasses. This new primitive method is the
|
||
* [-setCapacity:] method, and it differs from [-setLength:]
|
||
* as follows -
|
||
*
|
||
* [-setLength:]
|
||
* clears bytes when the allocated buffer grows
|
||
* never shrinks the allocated buffer capacity
|
||
* [-setCapacity:]
|
||
* doesn't clear newly allocated bytes
|
||
* sets the size of the allocated buffer.
|
||
*
|
||
* The actual class hierarchy is as follows -
|
||
*
|
||
* NSData Abstract base class.
|
||
* NSDataStatic Concrete class static buffers.
|
||
* NSDataEmpty Concrete class static buffers.
|
||
* NSDataMalloc Concrete class.
|
||
* NSDataMappedFile Memory mapped files.
|
||
* NSDataShared Extension for shared memory.
|
||
* NSMutableData Abstract base class.
|
||
* NSMutableDataMalloc Concrete class.
|
||
* NSMutableDataShared Extension for shared memory.
|
||
*
|
||
* NSMutableDataMalloc MUST share it's initial instance variable layout
|
||
* with NSDataMalloc so that it can use the 'behavior' code to inherit
|
||
* methods from NSDataMalloc.
|
||
*
|
||
* Since all the other subclasses are based on NSDataMalloc or
|
||
* NSMutableDataMalloc, we can put most methods in here and not
|
||
* bother with duplicating them in the other classes.
|
||
*
|
||
*/
|
||
|
||
#include "config.h"
|
||
#include "GNUstepBase/preface.h"
|
||
#include "GNUstepBase/GSObjCRuntime.h"
|
||
#include "Foundation/NSObjCRuntime.h"
|
||
#include "Foundation/NSByteOrder.h"
|
||
#include "Foundation/NSCoder.h"
|
||
#include "Foundation/NSData.h"
|
||
#include "Foundation/NSString.h"
|
||
#include "Foundation/NSException.h"
|
||
#include "Foundation/NSDebug.h"
|
||
#include "Foundation/NSFileManager.h"
|
||
#include "Foundation/NSPathUtilities.h"
|
||
#include "Foundation/NSRange.h"
|
||
#include "Foundation/NSURL.h"
|
||
#include "Foundation/NSZone.h"
|
||
#include <stdio.h>
|
||
#include <string.h> /* for memset() */
|
||
#ifdef HAVE_UNISTD_H
|
||
#include <unistd.h> /* SEEK_* on SunOS 4 */
|
||
#endif
|
||
|
||
#ifdef HAVE_MMAP
|
||
#include <unistd.h>
|
||
#include <sys/mman.h>
|
||
#include <fcntl.h>
|
||
#ifndef MAP_FAILED
|
||
#define MAP_FAILED ((void*)-1) /* Failure address. */
|
||
#endif
|
||
@class NSDataMappedFile;
|
||
#endif
|
||
|
||
#ifdef HAVE_SYS_STAT_H
|
||
#include <sys/stat.h>
|
||
#endif
|
||
|
||
#ifdef HAVE_SHMCTL
|
||
#include <sys/ipc.h>
|
||
#include <sys/shm.h>
|
||
|
||
#define VM_RDONLY 0644 /* self read/write - other readonly */
|
||
#define VM_ACCESS 0666 /* read/write access for all */
|
||
@class NSDataShared;
|
||
@class NSMutableDataShared;
|
||
#endif
|
||
|
||
@class NSDataMalloc;
|
||
@class NSDataStatic;
|
||
@class NSMutableDataMalloc;
|
||
|
||
/*
|
||
* Some static variables to cache classes and methods for quick access -
|
||
* these are set up at process startup or in [NSData +initialize]
|
||
*/
|
||
static SEL appendSel;
|
||
static Class dataStatic;
|
||
static Class dataMalloc;
|
||
static Class mutableDataMalloc;
|
||
static Class NSDataAbstract;
|
||
static Class NSMutableDataAbstract;
|
||
static SEL appendSel;
|
||
static IMP appendImp;
|
||
|
||
static BOOL
|
||
readContentsOfFile(NSString* path, void** buf, unsigned int* len, NSZone* zone)
|
||
{
|
||
#if defined(__MINGW32__)
|
||
const unichar *thePath = 0;
|
||
#else
|
||
const char *thePath = 0;
|
||
#endif
|
||
FILE *theFile = 0;
|
||
void *tmp = 0;
|
||
int c;
|
||
long fileLength;
|
||
|
||
#if GS_WITH_GC == 1
|
||
zone = GSAtomicMallocZone(); // Use non-GC memory inside NSData
|
||
#endif
|
||
|
||
#if defined(__MINGW32__)
|
||
thePath = (const unichar*)[path fileSystemRepresentation];
|
||
#else
|
||
thePath = [path fileSystemRepresentation];
|
||
#endif
|
||
if (thePath == 0)
|
||
{
|
||
NSWarnFLog(@"Open (%@) attempt failed - bad path", path);
|
||
return NO;
|
||
}
|
||
|
||
#if defined(__MINGW32__)
|
||
theFile = _wfopen(thePath, L"rb");
|
||
#else
|
||
theFile = fopen(thePath, "rb");
|
||
#endif
|
||
|
||
if (theFile == 0) /* We failed to open the file. */
|
||
{
|
||
NSWarnFLog(@"Open (%@) attempt failed - %s", path,
|
||
GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
|
||
/*
|
||
* Seek to the end of the file.
|
||
*/
|
||
c = fseek(theFile, 0L, SEEK_END);
|
||
if (c != 0)
|
||
{
|
||
NSWarnFLog(@"Seek to end of file (%@) failed - %s", path,
|
||
GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
|
||
/*
|
||
* Determine the length of the file (having seeked to the end of the
|
||
* file) by calling ftell().
|
||
*/
|
||
fileLength = ftell(theFile);
|
||
if (fileLength == -1)
|
||
{
|
||
NSWarnFLog(@"Ftell on %@ failed - %s", path,
|
||
GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
|
||
/*
|
||
* Rewind the file pointer to the beginning, preparing to read in
|
||
* the file.
|
||
*/
|
||
c = fseek(theFile, 0L, SEEK_SET);
|
||
if (c != 0)
|
||
{
|
||
NSWarnFLog(@"Fseek to start of file (%@) failed - %s", path,
|
||
GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
|
||
if (fileLength == 0)
|
||
{
|
||
unsigned char buf[BUFSIZ];
|
||
|
||
/*
|
||
* Special case ... a file of length zero may be a named pipe or some
|
||
* file in the /proc filesystem, which will return us data if we read
|
||
* from it ... so we try reading as much as we can.
|
||
*/
|
||
while ((c = fread(buf, 1, BUFSIZ, theFile)) != 0)
|
||
{
|
||
if (tmp == 0)
|
||
{
|
||
tmp = NSZoneMalloc(zone, c);
|
||
}
|
||
else
|
||
{
|
||
tmp = NSZoneRealloc(zone, tmp, fileLength + c);
|
||
}
|
||
if (tmp == 0)
|
||
{
|
||
NSLog(@"Malloc failed for file (%@) of length %d - %s", path,
|
||
fileLength + c, GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
memcpy(tmp + fileLength, buf, c);
|
||
fileLength += c;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
tmp = NSZoneMalloc(zone, fileLength);
|
||
if (tmp == 0)
|
||
{
|
||
NSLog(@"Malloc failed for file (%@) of length %d - %s", path,
|
||
fileLength, GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
|
||
c = fread(tmp, 1, fileLength, theFile);
|
||
if (c != (int)fileLength)
|
||
{
|
||
NSWarnFLog(@"read of file (%@) contents failed - %s", path,
|
||
GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
}
|
||
|
||
*buf = tmp;
|
||
*len = fileLength;
|
||
fclose(theFile);
|
||
return YES;
|
||
|
||
/*
|
||
* Just in case the failure action needs to be changed.
|
||
*/
|
||
failure:
|
||
if (tmp != 0)
|
||
{
|
||
NSZoneFree(zone, tmp);
|
||
}
|
||
if (theFile != 0)
|
||
{
|
||
fclose(theFile);
|
||
}
|
||
return NO;
|
||
}
|
||
|
||
/*
|
||
* NB, The start of the NSMutableDataMalloc instance variables must be
|
||
* identical to that of NSDataMalloc in order to inherit its methods.
|
||
*/
|
||
@interface NSDataStatic : NSData
|
||
{
|
||
unsigned length;
|
||
void *bytes;
|
||
}
|
||
@end
|
||
@interface NSDataEmpty: NSDataStatic
|
||
@end
|
||
|
||
@interface NSDataMalloc : NSDataStatic
|
||
{
|
||
}
|
||
@end
|
||
|
||
@interface NSMutableDataMalloc : NSMutableData
|
||
{
|
||
unsigned length;
|
||
void *bytes;
|
||
NSZone *zone;
|
||
unsigned capacity;
|
||
unsigned growth;
|
||
}
|
||
/* Increase capacity to at least the specified minimum value. */
|
||
- (void) _grow: (unsigned int)minimum;
|
||
@end
|
||
|
||
#ifdef HAVE_MMAP
|
||
@interface NSDataMappedFile : NSDataMalloc
|
||
@end
|
||
#endif
|
||
|
||
#ifdef HAVE_SHMCTL
|
||
@interface NSDataShared : NSDataMalloc
|
||
{
|
||
int shmid;
|
||
}
|
||
- (id) initWithShmID: (int)anId length: (unsigned int)bufferSize;
|
||
@end
|
||
|
||
@interface NSMutableDataShared : NSMutableDataMalloc
|
||
{
|
||
int shmid;
|
||
}
|
||
- (id) initWithShmID: (int)anId length: (unsigned int)bufferSize;
|
||
@end
|
||
#endif
|
||
|
||
|
||
|
||
/**
|
||
* <p>Class for storing a byte array. Methods for initializing from memory a
|
||
* file, or the network are provided, as well as the ability to write to a
|
||
* file or the network. If desired, object can take over management of a
|
||
* pre-allocated buffer (with malloc or similar), free'ing it when deallocated.
|
||
* </p>
|
||
* <p>The data buffer at any given time has a <em>capacity</em>, which is the
|
||
* size of its allocated memory area, in bytes, and a <em>length</em>, which
|
||
* is the length of data it is currently storing.</p>
|
||
*/
|
||
@implementation NSData
|
||
|
||
+ (void) initialize
|
||
{
|
||
if (self == [NSData class])
|
||
{
|
||
NSDataAbstract = self;
|
||
NSMutableDataAbstract = [NSMutableData class];
|
||
dataMalloc = [NSDataMalloc class];
|
||
dataStatic = [NSDataStatic class];
|
||
mutableDataMalloc = [NSMutableDataMalloc class];
|
||
appendSel = @selector(appendBytes:length:);
|
||
appendImp = [mutableDataMalloc instanceMethodForSelector: appendSel];
|
||
}
|
||
}
|
||
|
||
+ (id) allocWithZone: (NSZone*)z
|
||
{
|
||
if (self == NSDataAbstract)
|
||
{
|
||
return NSAllocateObject(dataMalloc, 0, z);
|
||
}
|
||
else
|
||
{
|
||
return NSAllocateObject(self, 0, z);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Returns an empty data object.
|
||
*/
|
||
+ (id) data
|
||
{
|
||
static NSData *empty = nil;
|
||
|
||
if (empty == nil)
|
||
{
|
||
empty = [NSDataEmpty allocWithZone: NSDefaultMallocZone()];
|
||
empty = [empty initWithBytesNoCopy: 0 length: 0 freeWhenDone: NO];
|
||
}
|
||
return empty;
|
||
}
|
||
|
||
/**
|
||
* Returns an autoreleased data object containing data copied from bytes
|
||
* and with the specified length. Invokes -initWithBytes:length:
|
||
*/
|
||
+ (id) dataWithBytes: (const void*)bytes
|
||
length: (unsigned int)length
|
||
{
|
||
NSData *d;
|
||
|
||
d = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytes: bytes length: length];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* Returns an autoreleased data object encapsulating the data at bytes
|
||
* and with the specified length. Invokes
|
||
* -initWithBytesNoCopy:length:freeWhenDone: with YES
|
||
*/
|
||
+ (id) dataWithBytesNoCopy: (void*)bytes
|
||
length: (unsigned int)length
|
||
{
|
||
NSData *d;
|
||
|
||
d = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytesNoCopy: bytes length: length freeWhenDone: YES];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* Returns an autoreleased data object encapsulating the data at bytes
|
||
* and with the specified length. Invokes
|
||
* -initWithBytesNoCopy:length:freeWhenDone:
|
||
*/
|
||
+ (id) dataWithBytesNoCopy: (void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
freeWhenDone: (BOOL)shouldFree
|
||
{
|
||
NSData *d;
|
||
|
||
if (shouldFree == YES)
|
||
{
|
||
d = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
}
|
||
else
|
||
{
|
||
d = [dataStatic allocWithZone: NSDefaultMallocZone()];
|
||
}
|
||
d = [d initWithBytesNoCopy: aBuffer
|
||
length: bufferSize
|
||
freeWhenDone: shouldFree];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* Returns a data object encapsulating the contents of the specified file.
|
||
* Invokes -initWithContentsOfFile:
|
||
*/
|
||
+ (id) dataWithContentsOfFile: (NSString*)path
|
||
{
|
||
NSData *d;
|
||
|
||
d = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithContentsOfFile: path];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* Returns a data object encapsulating the contents of the specified
|
||
* file mapped directly into memory.
|
||
* Invokes -initWithContentsOfMappedFile:
|
||
*/
|
||
+ (id) dataWithContentsOfMappedFile: (NSString*)path
|
||
{
|
||
NSData *d;
|
||
|
||
#ifdef HAVE_MMAP
|
||
d = [NSDataMappedFile allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithContentsOfMappedFile: path];
|
||
#else
|
||
d = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithContentsOfMappedFile: path];
|
||
#endif
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* Retrieves the information at the specified url and returns an NSData
|
||
* instance encapsulating it.
|
||
*/
|
||
+ (id) dataWithContentsOfURL: (NSURL*)url
|
||
{
|
||
NSData *d;
|
||
|
||
d = [url resourceDataUsingCache: YES];
|
||
return d;
|
||
}
|
||
|
||
/**
|
||
* Returns an autoreleased instance initialised by copying the contents of data.
|
||
*/
|
||
+ (id) dataWithData: (NSData*)data
|
||
{
|
||
NSData *d;
|
||
|
||
d = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytes: [data bytes] length: [data length]];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* Returns a new empty data object.
|
||
*/
|
||
+ (id) new
|
||
{
|
||
NSData *d;
|
||
|
||
d = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytesNoCopy: 0 length: 0 freeWhenDone: YES];
|
||
return d;
|
||
}
|
||
|
||
- (id) init
|
||
{
|
||
return [self initWithBytesNoCopy: 0 length: 0 freeWhenDone: YES];
|
||
}
|
||
|
||
/**
|
||
* Makes a copy of bufferSize bytes of data at aBuffer, and passes it to
|
||
* -initWithBytesNoCopy:length:freeWhenDone: with a YES argument in order
|
||
* to initialise the receiver. Returns the result.
|
||
*/
|
||
- (id) initWithBytes: (const void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
{
|
||
void *ptr = 0;
|
||
|
||
if (bufferSize > 0)
|
||
{
|
||
ptr = NSZoneMalloc(NSDefaultMallocZone(), bufferSize);
|
||
if (ptr == 0)
|
||
{
|
||
DESTROY(self);
|
||
return nil;
|
||
}
|
||
memcpy(ptr, aBuffer, bufferSize);
|
||
}
|
||
return [self initWithBytesNoCopy: ptr
|
||
length: bufferSize
|
||
freeWhenDone: YES];
|
||
}
|
||
|
||
/**
|
||
* Invokes -initWithBytesNoCopy:length:freeWhenDone: with the last argument
|
||
* set to YES. Returns the resulting initialised data object (which may not
|
||
* be the receiver).
|
||
*/
|
||
- (id) initWithBytesNoCopy: (void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
{
|
||
return [self initWithBytesNoCopy: aBuffer
|
||
length: bufferSize
|
||
freeWhenDone: YES];
|
||
}
|
||
|
||
/** <init /><override-subclass />
|
||
* Initialises the receiver.<br />
|
||
* The value of aBuffer is a pointer to something to be stored.<br />
|
||
* The value of bufferSize is the number of bytes to use.<br />
|
||
* The value of shouldFree specifies whether the receiver should
|
||
* attempt to free the memory pointer to by aBuffer when the receiver
|
||
* is deallocated ... ie. it says whether the receiver <em>owns</em>
|
||
* the memory. Supplying the wrong value here will lead to memory
|
||
* leaks or crashes.
|
||
*/
|
||
- (id) initWithBytesNoCopy: (void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
freeWhenDone: (BOOL)shouldFree
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
return nil;
|
||
}
|
||
|
||
/**
|
||
* Initialises the receiver with the contents of the specified file.<br />
|
||
* Returns the resulting object.<br />
|
||
* Returns nil if the file does not exist or can not be read for some reason.
|
||
*/
|
||
- (id) initWithContentsOfFile: (NSString*)path
|
||
{
|
||
void *fileBytes;
|
||
unsigned fileLength;
|
||
NSZone *zone;
|
||
|
||
#if GS_WITH_GC
|
||
zone = GSAtomicMallocZone();
|
||
#else
|
||
zone = GSObjCZone(self);
|
||
#endif
|
||
if (readContentsOfFile(path, &fileBytes, &fileLength, zone) == NO)
|
||
{
|
||
DESTROY(self);
|
||
}
|
||
else
|
||
{
|
||
self = [self initWithBytesNoCopy: fileBytes
|
||
length: fileLength
|
||
freeWhenDone: YES];
|
||
}
|
||
return self;
|
||
}
|
||
|
||
/**
|
||
* Initialize with data pointing to contents of file at path. Bytes are
|
||
* only "swapped in" as needed. File should not be moved or deleted for
|
||
* the life of this object.
|
||
*/
|
||
- (id) initWithContentsOfMappedFile: (NSString *)path
|
||
{
|
||
#ifdef HAVE_MMAP
|
||
NSZone *z = GSObjCZone(self);
|
||
RELEASE(self);
|
||
self = [NSDataMappedFile allocWithZone: z];
|
||
return [self initWithContentsOfMappedFile: path];
|
||
#else
|
||
return [self initWithContentsOfFile: path];
|
||
#endif
|
||
}
|
||
|
||
/**
|
||
* Initialize with data pointing to contents of URL, which will be
|
||
* retrieved immediately in a blocking manner.
|
||
*/
|
||
- (id) initWithContentsOfURL: (NSURL*)url
|
||
{
|
||
NSData *data = [url resourceDataUsingCache: YES];
|
||
|
||
return [self initWithData: data];
|
||
}
|
||
|
||
/**
|
||
* Initializes by copying data's bytes into a new buffer.
|
||
*/
|
||
- (id) initWithData: (NSData*)data
|
||
{
|
||
if (data == nil)
|
||
{
|
||
return [self initWithBytesNoCopy: 0 length: 0 freeWhenDone: YES];
|
||
}
|
||
if ([data isKindOfClass: [NSData class]] == NO)
|
||
{
|
||
NSLog(@"-initWithData: passed a non-data object");
|
||
RELEASE(self);
|
||
return nil;
|
||
}
|
||
return [self initWithBytes: [data bytes] length: [data length]];
|
||
}
|
||
|
||
|
||
// Accessing Data
|
||
|
||
/** <override-subclass>
|
||
* Returns a pointer to the data encapsulated by the receiver.
|
||
*/
|
||
- (const void*) bytes
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* Returns a short description of this object.
|
||
*/
|
||
- (NSString*) description
|
||
{
|
||
extern void GSPropertyListMake(id,NSDictionary*,BOOL,BOOL,unsigned,id*);
|
||
NSMutableString *result = nil;
|
||
|
||
GSPropertyListMake(self, nil, NO, YES, 0, &result);
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* Copies the contents of the memory encapsulated by the receiver into
|
||
* the specified buffer. The buffer must be large enough to contain
|
||
* -length bytes of data ... if it isn't then a crash is likely to occur.<br />
|
||
* Invokes -getBytes:range: with the range set to the whole of the receiver.
|
||
*/
|
||
- (void) getBytes: (void*)buffer
|
||
{
|
||
[self getBytes: buffer range: NSMakeRange(0, [self length])];
|
||
}
|
||
|
||
/**
|
||
* Copies length bytes of data from the memory encapsulated by the receiver
|
||
* into the specified buffer. The buffer must be large enough to contain
|
||
* length bytes of data ... if it isn't then a crash is likely to occur.<br />
|
||
* Invokes -getBytes:range: with the range set to NSMakeRange(0, length)
|
||
*/
|
||
- (void) getBytes: (void*)buffer length: (unsigned int)length
|
||
{
|
||
[self getBytes: buffer range: NSMakeRange(0, length)];
|
||
}
|
||
|
||
/**
|
||
* Copies data from the memory encapsulated by the receiver (in the range
|
||
* specified by aRange) into the specified buffer.<br />
|
||
* The buffer must be large enough to contain the data ... if it isn't then
|
||
* a crash is likely to occur.<br />
|
||
* If aRange specifies a range which does not entirely lie within the
|
||
* receiver, an exception is raised.
|
||
*/
|
||
- (void) getBytes: (void*)buffer range: (NSRange)aRange
|
||
{
|
||
unsigned size = [self length];
|
||
|
||
GS_RANGE_CHECK(aRange, size);
|
||
memcpy(buffer, [self bytes] + aRange.location, aRange.length);
|
||
}
|
||
|
||
- (id) replacementObjectForPortCoder: (NSPortCoder*)aCoder
|
||
{
|
||
return self;
|
||
}
|
||
|
||
/**
|
||
* Returns an NSData instance encapsulating the memory from the receiver
|
||
* specified by the range aRange.<br />
|
||
* If aRange specifies a range which does not entirely lie within the
|
||
* receiver, an exception is raised.
|
||
*/
|
||
- (NSData*) subdataWithRange: (NSRange)aRange
|
||
{
|
||
void *buffer;
|
||
unsigned l = [self length];
|
||
|
||
GS_RANGE_CHECK(aRange, l);
|
||
|
||
#if GS_WITH_GC
|
||
buffer = NSZoneMalloc(GSAtomicMallocZone(), aRange.length);
|
||
#else
|
||
buffer = NSZoneMalloc([self zone], aRange.length);
|
||
#endif
|
||
if (buffer == 0)
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"No memory for subdata of NSData object"];
|
||
}
|
||
[self getBytes: buffer range: aRange];
|
||
|
||
return [NSData dataWithBytesNoCopy: buffer length: aRange.length];
|
||
}
|
||
|
||
- (unsigned int) hash
|
||
{
|
||
unsigned char buf[64];
|
||
unsigned l = [self length];
|
||
unsigned ret =0;
|
||
|
||
l = MIN(l,64);
|
||
|
||
/*
|
||
* hash for empty data matches hash for empty string
|
||
*/
|
||
if (l == 0)
|
||
{
|
||
return 0xfffffffe;
|
||
}
|
||
|
||
[self getBytes: &buf range: NSMakeRange(0, l)];
|
||
|
||
while (l-- > 0)
|
||
{
|
||
ret = (ret << 5) + ret + buf[l];
|
||
}
|
||
// Again, match NSString
|
||
if (ret == 0)
|
||
{
|
||
ret = 0xffffffff;
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
- (BOOL) isEqual: anObject
|
||
{
|
||
if ([anObject isKindOfClass: [NSData class]])
|
||
return [self isEqualToData: anObject];
|
||
return NO;
|
||
}
|
||
|
||
/**
|
||
* Returns a boolean value indicating if the receiver and other contain
|
||
* identical data (using a byte by byte comparison). Assumes that the
|
||
* other object is an NSData instance ... may raise an exception if it isn't.
|
||
*/
|
||
- (BOOL) isEqualToData: (NSData*)other
|
||
{
|
||
unsigned int len;
|
||
if (other == self)
|
||
{
|
||
return YES;
|
||
}
|
||
if ((len = [self length]) != [other length])
|
||
{
|
||
return NO;
|
||
}
|
||
return (memcmp([self bytes], [other bytes], len) ? NO : YES);
|
||
}
|
||
|
||
/** <override-subclass>
|
||
* Returns the number of bytes of data encapsulated by the receiver.
|
||
*/
|
||
- (unsigned int) length
|
||
{
|
||
/* This is left to concrete subclasses to implement. */
|
||
[self subclassResponsibility: _cmd];
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* <p>Writes a copy of the data encapsulated by the receiver to a file
|
||
* at path. If the useAuxiliaryFile flag is YES, this writes to a
|
||
* temporary file and then renames that to the file at path, thus
|
||
* ensuring that path exists and does not contain partially written
|
||
* data at any point.
|
||
* </p>
|
||
* <p>On success returns YES, on failure returns NO.
|
||
* </p>
|
||
*/
|
||
- (BOOL) writeToFile: (NSString*)path atomically: (BOOL)useAuxiliaryFile
|
||
{
|
||
#if defined(__MINGW32__)
|
||
unsigned int length = [path length];
|
||
unichar wthePath[length + 100];
|
||
unichar wtheRealPath[length + 100];
|
||
#else
|
||
char thePath[BUFSIZ*2+8];
|
||
char theRealPath[BUFSIZ*2];
|
||
#endif
|
||
int c;
|
||
FILE *theFile;
|
||
BOOL error_BadPath = YES;
|
||
|
||
#if defined(__MINGW32__)
|
||
[path getCharacters: wtheRealPath];
|
||
wtheRealPath[length] = L'\0';
|
||
error_BadPath = (length <= 0);
|
||
#else
|
||
if ([path canBeConvertedToEncoding: [NSString defaultCStringEncoding]])
|
||
{
|
||
const char *local_c_path = [path cString];
|
||
|
||
if (local_c_path != 0 && strlen(local_c_path) < (BUFSIZ*2))
|
||
{
|
||
strcpy(theRealPath,local_c_path);
|
||
error_BadPath = NO;
|
||
}
|
||
}
|
||
#endif
|
||
if (error_BadPath)
|
||
{
|
||
NSWarnMLog(@"Open (%@) attempt failed - bad path",path);
|
||
return NO;
|
||
}
|
||
|
||
#ifdef HAVE_MKSTEMP
|
||
if (useAuxiliaryFile)
|
||
{
|
||
int desc;
|
||
int mask;
|
||
|
||
strcpy(thePath, theRealPath);
|
||
strcat(thePath, "XXXXXX");
|
||
if ((desc = mkstemp(thePath)) < 0)
|
||
{
|
||
NSWarnMLog(@"mkstemp (%s) failed - %s", thePath,
|
||
GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
mask = umask(0);
|
||
umask(mask);
|
||
fchmod(desc, 0644 & ~mask);
|
||
if ((theFile = fdopen(desc, "w")) == 0)
|
||
{
|
||
close(desc);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
strcpy(thePath, theRealPath);
|
||
theFile = fopen(thePath, "wb");
|
||
}
|
||
#else
|
||
if (useAuxiliaryFile)
|
||
{
|
||
/* Use the path name of the destination file as a prefix for the
|
||
* mktemp() call so that we can be sure that both files are on
|
||
* the same filesystem and the subsequent rename() will work. */
|
||
#if defined(__MINGW32__)
|
||
wcscpy(wthePath, wtheRealPath);
|
||
wcscat(wthePath, L"XXXXXX");
|
||
if (_wmktemp(wthePath) == 0)
|
||
{
|
||
NSWarnMLog(@"mktemp (%@) failed - %s",
|
||
[NSString stringWithCharacters:wthePath length:wcslen(wthePath)],
|
||
GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
#else
|
||
strcpy(thePath, theRealPath);
|
||
strcat(thePath, "XXXXXX");
|
||
if (mktemp(thePath) == 0)
|
||
{
|
||
NSWarnMLog(@"mktemp (%s) failed - %s", thePath,
|
||
GSLastErrorStr(errno));
|
||
goto failure;
|
||
}
|
||
#endif
|
||
}
|
||
else
|
||
{
|
||
#if defined(__MINGW32__)
|
||
wcscpy(wthePath,wtheRealPath);
|
||
#else
|
||
strcpy(thePath, theRealPath);
|
||
#endif
|
||
}
|
||
|
||
/* Open the file (whether temp or real) for writing. */
|
||
#if defined(__MINGW32__)
|
||
theFile = _wfopen(wthePath, L"wb");
|
||
#else
|
||
theFile = fopen(thePath, "wb");
|
||
#endif
|
||
#endif
|
||
|
||
if (theFile == 0)
|
||
{
|
||
/* Something went wrong; we weren't
|
||
* even able to open the file. */
|
||
#if defined(__MINGW32__)
|
||
NSWarnMLog(@"Open (%@) failed - %s",
|
||
[NSString stringWithCharacters: wthePath length: wcslen(wthePath)],
|
||
GSLastErrorStr(errno));
|
||
#else
|
||
NSWarnMLog(@"Open (%s) failed - %s", thePath, GSLastErrorStr(errno));
|
||
#endif
|
||
goto failure;
|
||
}
|
||
|
||
/* Now we try and write the NSData's bytes to the file. Here `c' is
|
||
* the number of bytes which were successfully written to the file
|
||
* in the fwrite() call. */
|
||
c = fwrite([self bytes], sizeof(char), [self length], theFile);
|
||
|
||
if (c < (int)[self length]) /* We failed to write everything for
|
||
* some reason. */
|
||
{
|
||
#if defined(__MINGW32__)
|
||
NSWarnMLog(@"Fwrite (%@) failed - %s",
|
||
[NSString stringWithCharacters:wthePath length:wcslen(wthePath)],
|
||
GSLastErrorStr(errno));
|
||
#else
|
||
NSWarnMLog(@"Fwrite (%s) failed - %s", thePath, GSLastErrorStr(errno));
|
||
#endif
|
||
goto failure;
|
||
}
|
||
|
||
/* We're done, so close everything up. */
|
||
c = fclose(theFile);
|
||
|
||
if (c != 0) /* I can't imagine what went wrong
|
||
* closing the file, but we got here,
|
||
* so we need to deal with it. */
|
||
{
|
||
#if defined(__MINGW32__)
|
||
NSWarnMLog(@"Fclose (%@) failed - %s",
|
||
[NSString stringWithCharacters:wthePath length:wcslen(wthePath)],
|
||
GSLastErrorStr(errno));
|
||
#else
|
||
NSWarnMLog(@"Fclose (%s) failed - %s", thePath, GSLastErrorStr(errno));
|
||
#endif
|
||
goto failure;
|
||
}
|
||
|
||
/* If we used a temporary file, we still need to rename() it be the
|
||
* real file. Also, we need to try to retain the file attributes of
|
||
* the original file we are overwriting (if we are) */
|
||
if (useAuxiliaryFile)
|
||
{
|
||
NSFileManager *mgr = [NSFileManager defaultManager];
|
||
NSMutableDictionary *att = nil;
|
||
|
||
if ([mgr fileExistsAtPath: path])
|
||
{
|
||
att = [[mgr fileAttributesAtPath: path
|
||
traverseLink: YES] mutableCopy];
|
||
IF_NO_GC(TEST_AUTORELEASE(att));
|
||
}
|
||
|
||
#if defined(__MINGW32__)
|
||
/*
|
||
* The windoze implementation of the POSIX rename() function is buggy
|
||
* and doesn't work if the destination file already exists ... so we
|
||
* try to use a windoze specific function instead.
|
||
*/
|
||
#if 0
|
||
if (ReplaceFile(theRealPath, thePath, 0,
|
||
REPLACEFILE_IGNORE_MERGE_ERRORS, 0, 0) != 0)
|
||
{
|
||
c = 0;
|
||
}
|
||
else
|
||
{
|
||
c = -1;
|
||
}
|
||
#else
|
||
if (MoveFileExW(wthePath, wtheRealPath, MOVEFILE_REPLACE_EXISTING) != 0)
|
||
{
|
||
c = 0;
|
||
}
|
||
/* Windows 9x does not support MoveFileEx */
|
||
else if (GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
|
||
{
|
||
unichar secondaryFile[length + 100];
|
||
|
||
wcscpy(secondaryFile, wthePath);
|
||
wcscat(secondaryFile, L"-delete");
|
||
// Delete the intermediate name just in case
|
||
DeleteFileW(secondaryFile);
|
||
// Move the existing file to the temp name
|
||
if (MoveFileW(wtheRealPath, secondaryFile) != 0)
|
||
{
|
||
if (MoveFileW(wthePath, wtheRealPath) != 0)
|
||
{
|
||
c = 0;
|
||
// Delete the old file if possible
|
||
DeleteFileW(secondaryFile);
|
||
}
|
||
else
|
||
{
|
||
c = -1; // failure, restore the old file if possible
|
||
MoveFileW(secondaryFile, wtheRealPath);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
c = -1; // failure
|
||
}
|
||
}
|
||
else
|
||
{
|
||
c = -1;
|
||
}
|
||
#endif
|
||
#else
|
||
c = rename(thePath, theRealPath);
|
||
#endif
|
||
if (c != 0) /* Many things could go wrong, I guess. */
|
||
{
|
||
#if defined(__MINGW32__)
|
||
NSWarnMLog(@"Rename ('%@' to '%@') failed - %s",
|
||
[NSString stringWithCharacters: wthePath length:wcslen(wthePath)],
|
||
[NSString stringWithCharacters:
|
||
wtheRealPath length:wcslen(wtheRealPath)],
|
||
GSLastErrorStr(errno));
|
||
#else
|
||
NSWarnMLog(@"Rename ('%s' to '%s') failed - %s",
|
||
thePath, theRealPath, GSLastErrorStr(errno));
|
||
#endif
|
||
goto failure;
|
||
}
|
||
|
||
if (att != nil)
|
||
{
|
||
/*
|
||
* We have created a new file - so we attempt to make it's
|
||
* attributes match that of the original.
|
||
*/
|
||
[att removeObjectForKey: NSFileSize];
|
||
[att removeObjectForKey: NSFileModificationDate];
|
||
[att removeObjectForKey: NSFileReferenceCount];
|
||
[att removeObjectForKey: NSFileSystemNumber];
|
||
[att removeObjectForKey: NSFileSystemFileNumber];
|
||
[att removeObjectForKey: NSFileDeviceIdentifier];
|
||
[att removeObjectForKey: NSFileType];
|
||
if ([mgr changeFileAttributes: att atPath: path] == NO)
|
||
{
|
||
NSWarnMLog(@"Unable to correctly set all attributes for '%@'",
|
||
path);
|
||
}
|
||
}
|
||
#ifndef __MINGW32__
|
||
else if (geteuid() == 0 && [@"root" isEqualToString: NSUserName()] == NO)
|
||
{
|
||
att = [NSDictionary dictionaryWithObjectsAndKeys:
|
||
NSFileOwnerAccountName, NSUserName(), nil];
|
||
if ([mgr changeFileAttributes: att atPath: path] == NO)
|
||
{
|
||
NSWarnMLog(@"Unable to correctly set ownership for '%@'", path);
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* success: */
|
||
return YES;
|
||
|
||
/* Just in case the failure action needs to be changed. */
|
||
failure:
|
||
/*
|
||
* Attempt to tidy up by removing temporary file on failure.
|
||
*/
|
||
if (useAuxiliaryFile)
|
||
{
|
||
#if defined(__MINGW32__)
|
||
_wunlink(wthePath);
|
||
#else
|
||
unlink(thePath);
|
||
#endif
|
||
}
|
||
return NO;
|
||
}
|
||
|
||
/**
|
||
* Writes a copy of the contents of the receiver to the specified URL.
|
||
*/
|
||
- (BOOL) writeToURL: (NSURL*)anURL atomically: (BOOL)flag
|
||
{
|
||
if ([anURL isFileURL] == YES)
|
||
{
|
||
return [self writeToFile: [anURL path] atomically: flag];
|
||
}
|
||
else
|
||
{
|
||
return [anURL setResourceData: self];
|
||
}
|
||
}
|
||
|
||
|
||
// Deserializing Data
|
||
|
||
/**
|
||
* Copies data from buffer starting from cursor. <strong>Deprecated</strong>.
|
||
* Use [-getBytes:] and related methods instead.
|
||
*/
|
||
- (unsigned int) deserializeAlignedBytesLengthAtCursor: (unsigned int*)cursor
|
||
{
|
||
return (unsigned)[self deserializeIntAtCursor: cursor];
|
||
}
|
||
|
||
/**
|
||
* Copies data from buffer starting from cursor. <strong>Deprecated</strong>.
|
||
* Use [-getBytes:] and related methods instead.
|
||
*/
|
||
- (void) deserializeBytes: (void*)buffer
|
||
length: (unsigned int)bytes
|
||
atCursor: (unsigned int*)cursor
|
||
{
|
||
NSRange range = { *cursor, bytes };
|
||
|
||
[self getBytes: buffer range: range];
|
||
*cursor += bytes;
|
||
}
|
||
|
||
- (void) deserializeDataAt: (void*)data
|
||
ofObjCType: (const char*)type
|
||
atCursor: (unsigned int*)cursor
|
||
context: (id <NSObjCTypeSerializationCallBack>)callback
|
||
{
|
||
if (!type || !data)
|
||
return;
|
||
|
||
switch (*type)
|
||
{
|
||
case _C_ID:
|
||
{
|
||
[callback deserializeObjectAt: data
|
||
ofObjCType: type
|
||
fromData: self
|
||
atCursor: cursor];
|
||
return;
|
||
}
|
||
case _C_CHARPTR:
|
||
{
|
||
int32_t length;
|
||
|
||
[self deserializeBytes: &length
|
||
length: sizeof(length)
|
||
atCursor: cursor];
|
||
length = GSSwapBigI32ToHost(length);
|
||
if (length == -1)
|
||
{
|
||
*(const char**)data = 0;
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
unsigned len = (length+1)*sizeof(char);
|
||
|
||
#if GS_WITH_GC == 0
|
||
*(char**)data = (char*)NSZoneMalloc(NSDefaultMallocZone(), len);
|
||
#else
|
||
*(char**)data = (char*)NSZoneMalloc(GSAtomicMallocZone(), len);
|
||
#endif
|
||
if (*(char**)data == 0)
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"out of memory to deserialize bytes"];
|
||
}
|
||
}
|
||
|
||
[self deserializeBytes: *(char**)data
|
||
length: length
|
||
atCursor: cursor];
|
||
(*(char**)data)[length] = '\0';
|
||
return;
|
||
}
|
||
case _C_ARY_B:
|
||
{
|
||
unsigned offset = 0;
|
||
unsigned size;
|
||
unsigned count = atoi(++type);
|
||
unsigned i;
|
||
|
||
while (isdigit(*type))
|
||
{
|
||
type++;
|
||
}
|
||
size = objc_sizeof_type(type);
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
[self deserializeDataAt: (char*)data + offset
|
||
ofObjCType: type
|
||
atCursor: cursor
|
||
context: callback];
|
||
offset += size;
|
||
}
|
||
return;
|
||
}
|
||
case _C_STRUCT_B:
|
||
{
|
||
struct objc_struct_layout layout;
|
||
|
||
objc_layout_structure (type, &layout);
|
||
while (objc_layout_structure_next_member (&layout))
|
||
{
|
||
unsigned offset;
|
||
unsigned align;
|
||
const char *ftype;
|
||
|
||
objc_layout_structure_get_info (&layout, &offset, &align, &ftype);
|
||
|
||
[self deserializeDataAt: ((char*)data) + offset
|
||
ofObjCType: ftype
|
||
atCursor: cursor
|
||
context: callback];
|
||
}
|
||
return;
|
||
}
|
||
case _C_PTR:
|
||
{
|
||
unsigned len = objc_sizeof_type(++type);
|
||
|
||
#if GS_WITH_GC == 0
|
||
*(char**)data = (char*)NSZoneMalloc(NSDefaultMallocZone(), len);
|
||
#else
|
||
*(char**)data = (char*)NSZoneMalloc(GSAtomicMallocZone(), len);
|
||
#endif
|
||
if (*(char**)data == 0)
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"out of memory to deserialize bytes"];
|
||
}
|
||
[self deserializeDataAt: *(char**)data
|
||
ofObjCType: type
|
||
atCursor: cursor
|
||
context: callback];
|
||
return;
|
||
}
|
||
case _C_CHR:
|
||
case _C_UCHR:
|
||
{
|
||
[self deserializeBytes: data
|
||
length: sizeof(unsigned char)
|
||
atCursor: cursor];
|
||
return;
|
||
}
|
||
case _C_SHT:
|
||
case _C_USHT:
|
||
{
|
||
unsigned short ns;
|
||
|
||
[self deserializeBytes: &ns
|
||
length: sizeof(unsigned short)
|
||
atCursor: cursor];
|
||
*(unsigned short*)data = NSSwapBigShortToHost(ns);
|
||
return;
|
||
}
|
||
case _C_INT:
|
||
case _C_UINT:
|
||
{
|
||
unsigned ni;
|
||
|
||
[self deserializeBytes: &ni
|
||
length: sizeof(unsigned)
|
||
atCursor: cursor];
|
||
*(unsigned*)data = NSSwapBigIntToHost(ni);
|
||
return;
|
||
}
|
||
case _C_LNG:
|
||
case _C_ULNG:
|
||
{
|
||
unsigned long nl;
|
||
|
||
[self deserializeBytes: &nl
|
||
length: sizeof(unsigned long)
|
||
atCursor: cursor];
|
||
*(unsigned long*)data = NSSwapBigLongToHost(nl);
|
||
return;
|
||
}
|
||
case _C_LNG_LNG:
|
||
case _C_ULNG_LNG:
|
||
{
|
||
unsigned long long nl;
|
||
|
||
[self deserializeBytes: &nl
|
||
length: sizeof(unsigned long long)
|
||
atCursor: cursor];
|
||
*(unsigned long long*)data = NSSwapBigLongLongToHost(nl);
|
||
return;
|
||
}
|
||
case _C_FLT:
|
||
{
|
||
NSSwappedFloat nf;
|
||
|
||
[self deserializeBytes: &nf
|
||
length: sizeof(NSSwappedFloat)
|
||
atCursor: cursor];
|
||
*(float*)data = NSSwapBigFloatToHost(nf);
|
||
return;
|
||
}
|
||
case _C_DBL:
|
||
{
|
||
NSSwappedDouble nd;
|
||
|
||
[self deserializeBytes: &nd
|
||
length: sizeof(NSSwappedDouble)
|
||
atCursor: cursor];
|
||
*(double*)data = NSSwapBigDoubleToHost(nd);
|
||
return;
|
||
}
|
||
case _C_CLASS:
|
||
{
|
||
uint16_t ni;
|
||
|
||
[self deserializeBytes: &ni
|
||
length: sizeof(ni)
|
||
atCursor: cursor];
|
||
ni = GSSwapBigI16ToHost(ni);
|
||
if (ni == 0)
|
||
{
|
||
*(Class*)data = 0;
|
||
}
|
||
else
|
||
{
|
||
char name[ni+1];
|
||
Class c;
|
||
|
||
[self deserializeBytes: name
|
||
length: ni
|
||
atCursor: cursor];
|
||
name[ni] = '\0';
|
||
c = GSClassFromName(name);
|
||
if (c == 0)
|
||
{
|
||
NSLog(@"[%s %s] can't find class - %s",
|
||
GSNameFromClass([self class]),
|
||
GSNameFromSelector(_cmd), name);
|
||
}
|
||
*(Class*)data = c;
|
||
}
|
||
return;
|
||
}
|
||
case _C_SEL:
|
||
{
|
||
uint16_t ln;
|
||
uint16_t lt;
|
||
|
||
[self deserializeBytes: &ln
|
||
length: sizeof(ln)
|
||
atCursor: cursor];
|
||
ln = GSSwapBigI16ToHost(ln);
|
||
[self deserializeBytes: <
|
||
length: sizeof(lt)
|
||
atCursor: cursor];
|
||
lt = GSSwapBigI16ToHost(lt);
|
||
if (ln == 0)
|
||
{
|
||
*(SEL*)data = 0;
|
||
}
|
||
else
|
||
{
|
||
char name[ln+1];
|
||
char types[lt+1];
|
||
SEL sel;
|
||
|
||
[self deserializeBytes: name
|
||
length: ln
|
||
atCursor: cursor];
|
||
name[ln] = '\0';
|
||
[self deserializeBytes: types
|
||
length: lt
|
||
atCursor: cursor];
|
||
types[lt] = '\0';
|
||
|
||
if (lt)
|
||
{
|
||
sel = sel_get_typed_uid(name, types);
|
||
}
|
||
else
|
||
{
|
||
sel = sel_get_any_typed_uid(name);
|
||
}
|
||
if (sel == 0)
|
||
{
|
||
if (lt)
|
||
{
|
||
sel = sel_register_typed_name(name, types);
|
||
}
|
||
else
|
||
{
|
||
sel = sel_register_name(name);
|
||
}
|
||
if (sel == 0)
|
||
{
|
||
[NSException raise: NSInternalInconsistencyException
|
||
format: @"can't make sel with name '%s' "
|
||
@"and types '%s'", name, types];
|
||
}
|
||
}
|
||
*(SEL*)data = sel;
|
||
}
|
||
return;
|
||
}
|
||
default:
|
||
[NSException raise: NSGenericException
|
||
format: @"Unknown type to deserialize - '%s'", type];
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Retrieve an int from this data, which is assumed to be in network
|
||
* (big-endian) byte order. Cursor refers to byte position.
|
||
*/
|
||
- (int) deserializeIntAtCursor: (unsigned int*)cursor
|
||
{
|
||
unsigned ni, result;
|
||
|
||
[self deserializeBytes: &ni length: sizeof(unsigned) atCursor: cursor];
|
||
result = NSSwapBigIntToHost(ni);
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* Retrieve an int from this data, which is assumed to be in network
|
||
* (big-endian) byte order. Index refers to byte position.
|
||
*/
|
||
- (int) deserializeIntAtIndex: (unsigned int)index
|
||
{
|
||
unsigned ni, result;
|
||
|
||
[self deserializeBytes: &ni length: sizeof(unsigned) atCursor: &index];
|
||
result = NSSwapBigIntToHost(ni);
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* Retrieve ints from intBuffer, which is assumed to be in network (big-endian)
|
||
* byte order. Count refers to number of ints, but index refers to byte
|
||
* position.
|
||
*/
|
||
- (void) deserializeInts: (int*)intBuffer
|
||
count: (unsigned int)numInts
|
||
atCursor: (unsigned int*)cursor
|
||
{
|
||
unsigned i;
|
||
|
||
[self deserializeBytes: &intBuffer
|
||
length: numInts * sizeof(unsigned)
|
||
atCursor: cursor];
|
||
for (i = 0; i < numInts; i++)
|
||
intBuffer[i] = NSSwapBigIntToHost(intBuffer[i]);
|
||
}
|
||
|
||
/**
|
||
* Retrieve ints from intBuffer, which is assumed to be in network (big-endian)
|
||
* byte order. Count refers to number of ints, but index refers to byte
|
||
* position.
|
||
*/
|
||
- (void) deserializeInts: (int*)intBuffer
|
||
count: (unsigned int)numInts
|
||
atIndex: (unsigned int)index
|
||
{
|
||
unsigned i;
|
||
|
||
[self deserializeBytes: &intBuffer
|
||
length: numInts * sizeof(int)
|
||
atCursor: &index];
|
||
for (i = 0; i < numInts; i++)
|
||
{
|
||
intBuffer[i] = NSSwapBigIntToHost(intBuffer[i]);
|
||
}
|
||
}
|
||
|
||
- (id) copyWithZone: (NSZone*)z
|
||
{
|
||
if (NSShouldRetainWithZone(self, z) &&
|
||
[self isKindOfClass: [NSMutableData class]] == NO)
|
||
return RETAIN(self);
|
||
else
|
||
return [[dataMalloc allocWithZone: z]
|
||
initWithBytes: [self bytes] length: [self length]];
|
||
}
|
||
|
||
- (id) mutableCopyWithZone: (NSZone*)zone
|
||
{
|
||
return [[mutableDataMalloc allocWithZone: zone]
|
||
initWithBytes: [self bytes] length: [self length]];
|
||
}
|
||
|
||
- (void) encodeWithCoder: (NSCoder*)coder
|
||
{
|
||
[coder encodeDataObject: self];
|
||
}
|
||
|
||
- (id) initWithCoder: (NSCoder*)coder
|
||
{
|
||
id obj = [coder decodeDataObject];
|
||
|
||
if (obj != self)
|
||
{
|
||
ASSIGN(self, obj);
|
||
}
|
||
return self;
|
||
}
|
||
|
||
@end
|
||
|
||
/**
|
||
* Provides some shared-memory extensions to [NSData].
|
||
*/
|
||
@implementation NSData (GNUstepExtensions)
|
||
|
||
/**
|
||
* New instance with given shared memory ID.
|
||
*/
|
||
+ (id) dataWithShmID: (int)anID length: (unsigned int)length
|
||
{
|
||
#ifdef HAVE_SHMCTL
|
||
NSDataShared *d;
|
||
|
||
d = [NSDataShared allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithShmID: anID length: length];
|
||
return AUTORELEASE(d);
|
||
#else
|
||
NSLog(@"[NSData -dataWithSmdID:length:] no shared memory support");
|
||
return nil;
|
||
#endif
|
||
}
|
||
|
||
/**
|
||
* New instance with given bytes in shared memory.
|
||
*/
|
||
+ (id) dataWithSharedBytes: (const void*)bytes length: (unsigned int)length
|
||
{
|
||
NSData *d;
|
||
|
||
#ifdef HAVE_SHMCTL
|
||
d = [NSDataShared allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytes: bytes length: length];
|
||
#else
|
||
d = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytes: bytes length: length];
|
||
#endif
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
+ (id) dataWithStaticBytes: (const void*)bytes length: (unsigned int)length
|
||
{
|
||
NSDataStatic *d;
|
||
|
||
d = [dataStatic allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytesNoCopy: (void*)bytes length: length freeWhenDone: NO];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
- (void) deserializeTypeTag: (unsigned char*)tag
|
||
andCrossRef: (unsigned int*)ref
|
||
atCursor: (unsigned int*)cursor
|
||
{
|
||
[self deserializeDataAt: (void*)tag
|
||
ofObjCType: @encode(uint8_t)
|
||
atCursor: cursor
|
||
context: nil];
|
||
if (*tag & _GSC_MAYX)
|
||
{
|
||
switch (*tag & _GSC_SIZE)
|
||
{
|
||
case _GSC_X_0:
|
||
{
|
||
return;
|
||
}
|
||
case _GSC_X_1:
|
||
{
|
||
uint8_t x;
|
||
|
||
[self deserializeDataAt: (void*)&x
|
||
ofObjCType: @encode(uint8_t)
|
||
atCursor: cursor
|
||
context: nil];
|
||
*ref = (unsigned int)x;
|
||
return;
|
||
}
|
||
case _GSC_X_2:
|
||
{
|
||
uint16_t x;
|
||
|
||
[self deserializeDataAt: (void*)&x
|
||
ofObjCType: @encode(uint16_t)
|
||
atCursor: cursor
|
||
context: nil];
|
||
*ref = (unsigned int)x;
|
||
return;
|
||
}
|
||
default:
|
||
{
|
||
uint32_t x;
|
||
|
||
[self deserializeDataAt: (void*)&x
|
||
ofObjCType: @encode(uint32_t)
|
||
atCursor: cursor
|
||
context: nil];
|
||
*ref = (unsigned int)x;
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
@end
|
||
|
||
|
||
/**
|
||
* Mutable version of [NSData]. Methods are provided for appending and
|
||
* replacing bytes in the buffer, which will be grown as needed.
|
||
*/
|
||
@implementation NSMutableData
|
||
+ (id) allocWithZone: (NSZone*)z
|
||
{
|
||
if (self == NSMutableDataAbstract)
|
||
{
|
||
return NSAllocateObject(mutableDataMalloc, 0, z);
|
||
}
|
||
else
|
||
{
|
||
return NSAllocateObject(self, 0, z);
|
||
}
|
||
}
|
||
|
||
+ (id) data
|
||
{
|
||
NSMutableData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithCapacity: 0];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
+ (id) dataWithBytes: (const void*)bytes
|
||
length: (unsigned int)length
|
||
{
|
||
NSData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytes: bytes length: length];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
+ (id) dataWithBytesNoCopy: (void*)bytes
|
||
length: (unsigned int)length
|
||
{
|
||
NSData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytesNoCopy: bytes length: length];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* New instance with buffer of given numBytes with length of valid data set
|
||
* to zero. Note that capacity will be automatically increased as necessary.
|
||
*/
|
||
+ (id) dataWithCapacity: (unsigned int)numBytes
|
||
{
|
||
NSMutableData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithCapacity: numBytes];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
+ (id) dataWithContentsOfFile: (NSString*)path
|
||
{
|
||
NSMutableData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithContentsOfFile: path];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
+ (id) dataWithContentsOfMappedFile: (NSString*)path
|
||
{
|
||
NSMutableData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithContentsOfMappedFile: path];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
+ (id) dataWithContentsOfURL: (NSURL*)url
|
||
{
|
||
NSMutableData *d;
|
||
NSData *data;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
data = [url resourceDataUsingCache: YES];
|
||
d = [d initWithBytes: [data bytes] length: [data length]];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
+ (id) dataWithData: (NSData*)data
|
||
{
|
||
NSMutableData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytes: [data bytes] length: [data length]];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* New instance with buffer of capacity and valid data size equal to given
|
||
* length in bytes. The buffer contents are set to zero. The length of
|
||
* valid data is set to zero. Note that buffer will be automatically
|
||
* increased as necessary.
|
||
*/
|
||
+ (id) dataWithLength: (unsigned int)length
|
||
{
|
||
NSMutableData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithLength: length];
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
+ (id) new
|
||
{
|
||
NSMutableData *d;
|
||
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithCapacity: 0];
|
||
return d;
|
||
}
|
||
|
||
- (const void*) bytes
|
||
{
|
||
return [self mutableBytes];
|
||
}
|
||
|
||
- (void) encodeWithCoder: (NSCoder*)aCoder
|
||
{
|
||
unsigned length = [self length];
|
||
void *bytes = [self mutableBytes];
|
||
|
||
[aCoder encodeValueOfObjCType: @encode(unsigned int)
|
||
at: &length];
|
||
if (length)
|
||
{
|
||
[aCoder encodeArrayOfObjCType: @encode(unsigned char)
|
||
count: length
|
||
at: bytes];
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Initialize with buffer capable of holding size bytes. The length of valid
|
||
* data is initially set to zero.
|
||
* <init/>
|
||
*/
|
||
- (id) initWithCapacity: (unsigned int)capacity
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
return nil;
|
||
}
|
||
|
||
- (id) initWithCoder: (NSCoder*)aCoder
|
||
{
|
||
unsigned l;
|
||
NSZone *zone;
|
||
|
||
#if GS_WITH_GC
|
||
zone = GSAtomicMallocZone();
|
||
#else
|
||
zone = [self zone];
|
||
#endif
|
||
|
||
[aCoder decodeValueOfObjCType: @encode(unsigned int) at: &l];
|
||
if (l)
|
||
{
|
||
void *b = NSZoneMalloc(zone, l);
|
||
|
||
if (b == 0)
|
||
{
|
||
NSLog(@"[NSDataMalloc -initWithCoder:] unable to get %lu bytes", l);
|
||
RELEASE(self);
|
||
return nil;
|
||
}
|
||
[aCoder decodeArrayOfObjCType: @encode(unsigned char) count: l at: b];
|
||
self = [self initWithBytesNoCopy: b length: l];
|
||
}
|
||
else
|
||
{
|
||
self = [self initWithBytesNoCopy: 0 length: 0];
|
||
}
|
||
return self;
|
||
}
|
||
|
||
/**
|
||
* Initialize with buffer of capacity equal to length, and with the length
|
||
* of valid data set to length. Data is set to zero.
|
||
*/
|
||
- (id) initWithLength: (unsigned int)length
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
return nil;
|
||
}
|
||
|
||
// Adjusting Capacity
|
||
/**
|
||
* Increases buffer length by given number of bytes, filling the new space
|
||
* with zeros.
|
||
*/
|
||
- (void) increaseLengthBy: (unsigned int)extraLength
|
||
{
|
||
[self setLength: [self length]+extraLength];
|
||
}
|
||
|
||
/**
|
||
* <p>
|
||
* Sets the length of the NSMutableData object.
|
||
* If the length is increased, the newly allocated data area
|
||
* is filled with zero bytes.
|
||
* </p>
|
||
* <p>
|
||
* This is a 'primitive' method ... you need to implement it
|
||
* if you write a subclass of NSMutableData.
|
||
* </p>
|
||
*/
|
||
- (void) setLength: (unsigned int)size
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
}
|
||
|
||
/**
|
||
* <p>
|
||
* Returns a pointer to the data storage of the receiver.<br />
|
||
* Modifications to the memory pointed to by this pointer will
|
||
* change the contents of the object. It is important that
|
||
* your code should not try to modify the memory beyond the
|
||
* number of bytes given by the <code>-length</code> method.
|
||
* </p>
|
||
* <p>
|
||
* NB. if the object is released, or any method that changes its
|
||
* size or content is called, then the pointer previously returned
|
||
* by this method may cease to be valid.
|
||
* </p>
|
||
* <p>
|
||
* This is a 'primitive' method ... you need to implement it
|
||
* if you write a subclass of NSMutableData.
|
||
* </p>
|
||
*/
|
||
- (void*) mutableBytes
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
return 0;
|
||
}
|
||
|
||
// Appending Data
|
||
|
||
/**
|
||
* Appends bufferSize bytes from aBuffer to data, increasing capacity if
|
||
* necessary.
|
||
*/
|
||
- (void) appendBytes: (const void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
{
|
||
unsigned oldLength = [self length];
|
||
void* buffer;
|
||
|
||
[self setLength: oldLength + bufferSize];
|
||
buffer = [self mutableBytes];
|
||
memcpy(buffer + oldLength, aBuffer, bufferSize);
|
||
}
|
||
|
||
/**
|
||
* Copies and appends data from other to data, increasing capacity if
|
||
* necessary.
|
||
*/
|
||
- (void) appendData: (NSData*)other
|
||
{
|
||
[self appendBytes: [other bytes] length: [other length]];
|
||
}
|
||
|
||
/**
|
||
* Replaces the bytes of data in the specified range with a
|
||
* copy of the new bytes supplied.<br />
|
||
* If the location of the range specified lies beyond the end
|
||
* of the data (<code>[self length] < range.location</code>)
|
||
* then a range exception is raised.<br />
|
||
* Otherwise, if the range specified extends beyond the end
|
||
* of the data, then the size of the data is increased to
|
||
* accommodate the new bytes.<br />
|
||
*/
|
||
- (void) replaceBytesInRange: (NSRange)aRange
|
||
withBytes: (const void*)bytes
|
||
{
|
||
unsigned size = [self length];
|
||
unsigned need = NSMaxRange(aRange);
|
||
|
||
if (aRange.location > size)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"location bad in replaceByteInRange:withBytes:"];
|
||
}
|
||
if (aRange.length > 0)
|
||
{
|
||
if (need > size)
|
||
{
|
||
[self setLength: need];
|
||
}
|
||
memmove([self mutableBytes] + aRange.location, bytes, aRange.length);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Replace the content of the receiver which lies in aRange with
|
||
* the specified length of data from the buffer pointed to by bytes.<br />
|
||
* The size of the receiver is adjusted to allow for the change.
|
||
*/
|
||
- (void) replaceBytesInRange: (NSRange)aRange
|
||
withBytes: (const void*)bytes
|
||
length: (unsigned int)length
|
||
{
|
||
unsigned size = [self length];
|
||
unsigned end = NSMaxRange(aRange);
|
||
int shift = length - aRange.length;
|
||
unsigned need = size + shift;
|
||
void *buf;
|
||
|
||
if (aRange.location > size)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"location bad in replaceByteInRange:withBytes:"];
|
||
}
|
||
if (need > size)
|
||
{
|
||
[self setLength: need];
|
||
}
|
||
buf = [self mutableBytes];
|
||
if (shift < 0)
|
||
{
|
||
if (length > 0)
|
||
{
|
||
// Copy bytes into place.
|
||
memmove(buf + aRange.location, bytes, length);
|
||
}
|
||
// Fill gap
|
||
memmove(buf + end + shift, buf + end, size - end);
|
||
}
|
||
else
|
||
{
|
||
if (shift > 0)
|
||
{
|
||
// Open space
|
||
memmove(buf + end + shift, buf + end, size - end);
|
||
}
|
||
if (length > 0)
|
||
{
|
||
// Copy bytes into place.
|
||
memmove(buf + aRange.location, bytes, length);
|
||
}
|
||
}
|
||
if (need < size)
|
||
{
|
||
[self setLength: need];
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Set bytes in aRange to 0.
|
||
*/
|
||
- (void) resetBytesInRange: (NSRange)aRange
|
||
{
|
||
unsigned size = [self length];
|
||
|
||
GS_RANGE_CHECK(aRange, size);
|
||
memset((char*)[self bytes] + aRange.location, 0, aRange.length);
|
||
}
|
||
|
||
/**
|
||
* Replaces contents of buffer with contents of data's buffer, increasing
|
||
* or shrinking capacity to match.
|
||
*/
|
||
- (void) setData: (NSData*)data
|
||
{
|
||
NSRange r = NSMakeRange(0, [data length]);
|
||
|
||
[self setCapacity: r.length];
|
||
[self replaceBytesInRange: r withBytes: [data bytes]];
|
||
}
|
||
|
||
// Serializing Data
|
||
|
||
/**
|
||
* Does not act as the name suggests. Instead, serializes length itself
|
||
* as an int into buffer.
|
||
*/
|
||
- (void) serializeAlignedBytesLength: (unsigned int)length
|
||
{
|
||
[self serializeInt: length];
|
||
}
|
||
|
||
- (void) serializeDataAt: (const void*)data
|
||
ofObjCType: (const char*)type
|
||
context: (id <NSObjCTypeSerializationCallBack>)callback
|
||
{
|
||
if (!data || !type)
|
||
return;
|
||
|
||
switch (*type)
|
||
{
|
||
case _C_ID:
|
||
[callback serializeObjectAt: (id*)data
|
||
ofObjCType: type
|
||
intoData: self];
|
||
return;
|
||
|
||
case _C_CHARPTR:
|
||
{
|
||
uint32_t len;
|
||
uint32_t ni;
|
||
|
||
if (!*(void**)data)
|
||
{
|
||
ni = (uint32_t)-1;
|
||
ni = GSSwapHostI32ToBig(ni);
|
||
[self appendBytes: (void*)&ni length: sizeof(ni)];
|
||
return;
|
||
}
|
||
len = (uint32_t)strlen(*(void**)data);
|
||
ni = GSSwapHostI32ToBig(len);
|
||
[self appendBytes: (void*)&ni length: sizeof(ni)];
|
||
[self appendBytes: *(void**)data length: len];
|
||
return;
|
||
}
|
||
case _C_ARY_B:
|
||
{
|
||
unsigned offset = 0;
|
||
unsigned size;
|
||
unsigned count = atoi(++type);
|
||
unsigned i;
|
||
|
||
while (isdigit(*type))
|
||
{
|
||
type++;
|
||
}
|
||
size = objc_sizeof_type(type);
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
[self serializeDataAt: (char*)data + offset
|
||
ofObjCType: type
|
||
context: callback];
|
||
offset += size;
|
||
}
|
||
return;
|
||
}
|
||
case _C_STRUCT_B:
|
||
{
|
||
struct objc_struct_layout layout;
|
||
|
||
objc_layout_structure (type, &layout);
|
||
while (objc_layout_structure_next_member (&layout))
|
||
{
|
||
unsigned offset;
|
||
unsigned align;
|
||
const char *ftype;
|
||
|
||
objc_layout_structure_get_info (&layout, &offset, &align, &ftype);
|
||
|
||
[self serializeDataAt: ((char*)data) + offset
|
||
ofObjCType: ftype
|
||
context: callback];
|
||
}
|
||
return;
|
||
}
|
||
case _C_PTR:
|
||
[self serializeDataAt: *(char**)data
|
||
ofObjCType: ++type
|
||
context: callback];
|
||
return;
|
||
case _C_CHR:
|
||
case _C_UCHR:
|
||
[self appendBytes: data length: sizeof(unsigned char)];
|
||
return;
|
||
case _C_SHT:
|
||
case _C_USHT:
|
||
{
|
||
unsigned short ns = NSSwapHostShortToBig(*(unsigned short*)data);
|
||
[self appendBytes: &ns length: sizeof(unsigned short)];
|
||
return;
|
||
}
|
||
case _C_INT:
|
||
case _C_UINT:
|
||
{
|
||
unsigned ni = NSSwapHostIntToBig(*(unsigned int*)data);
|
||
[self appendBytes: &ni length: sizeof(unsigned)];
|
||
return;
|
||
}
|
||
case _C_LNG:
|
||
case _C_ULNG:
|
||
{
|
||
unsigned long nl = NSSwapHostLongToBig(*(unsigned long*)data);
|
||
[self appendBytes: &nl length: sizeof(unsigned long)];
|
||
return;
|
||
}
|
||
case _C_LNG_LNG:
|
||
case _C_ULNG_LNG:
|
||
{
|
||
unsigned long long nl;
|
||
|
||
nl = NSSwapHostLongLongToBig(*(unsigned long long*)data);
|
||
[self appendBytes: &nl length: sizeof(unsigned long long)];
|
||
return;
|
||
}
|
||
case _C_FLT:
|
||
{
|
||
NSSwappedFloat nf = NSSwapHostFloatToBig(*(float*)data);
|
||
|
||
[self appendBytes: &nf length: sizeof(NSSwappedFloat)];
|
||
return;
|
||
}
|
||
case _C_DBL:
|
||
{
|
||
NSSwappedDouble nd = NSSwapHostDoubleToBig(*(double*)data);
|
||
|
||
[self appendBytes: &nd length: sizeof(NSSwappedDouble)];
|
||
return;
|
||
}
|
||
case _C_CLASS:
|
||
{
|
||
const char *name = *(Class*)data?GSNameFromClass(*(Class*)data):"";
|
||
uint16_t ln = (uint16_t)strlen(name);
|
||
uint16_t ni;
|
||
|
||
ni = GSSwapHostI16ToBig(ln);
|
||
[self appendBytes: &ni length: sizeof(ni)];
|
||
if (ln)
|
||
{
|
||
[self appendBytes: name length: ln];
|
||
}
|
||
return;
|
||
}
|
||
case _C_SEL:
|
||
{
|
||
const char *name = *(SEL*)data?GSNameFromSelector(*(SEL*)data):"";
|
||
uint16_t ln = (name == 0) ? 0 : (uint16_t)strlen(name);
|
||
const char *types = *(SEL*)data?GSTypesFromSelector(*(SEL*)data):"";
|
||
uint16_t lt = (types == 0) ? 0 : (uint16_t)strlen(types);
|
||
uint16_t ni;
|
||
|
||
ni = GSSwapHostI16ToBig(ln);
|
||
[self appendBytes: &ni length: sizeof(ni)];
|
||
ni = GSSwapHostI16ToBig(lt);
|
||
[self appendBytes: &ni length: sizeof(ni)];
|
||
if (ln)
|
||
{
|
||
[self appendBytes: name length: ln];
|
||
}
|
||
if (lt)
|
||
{
|
||
[self appendBytes: types length: lt];
|
||
}
|
||
return;
|
||
}
|
||
default:
|
||
[NSException raise: NSGenericException
|
||
format: @"Unknown type to serialize - '%s'", type];
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Serialize an int into this object's data buffer, swapping it to network
|
||
* (big-endian) byte order first.
|
||
*/
|
||
- (void) serializeInt: (int)value
|
||
{
|
||
unsigned ni = NSSwapHostIntToBig(value);
|
||
[self appendBytes: &ni length: sizeof(unsigned)];
|
||
}
|
||
|
||
/**
|
||
* Serialize an int into this object's data buffer at index (replacing
|
||
* anything there currently), swapping it to network (big-endian) byte order
|
||
* first.
|
||
*/
|
||
- (void) serializeInt: (int)value atIndex: (unsigned int)index
|
||
{
|
||
unsigned ni = NSSwapHostIntToBig(value);
|
||
NSRange range = { index, sizeof(int) };
|
||
|
||
[self replaceBytesInRange: range withBytes: &ni];
|
||
}
|
||
|
||
/**
|
||
* Serialize one or more ints into this object's data buffer, swapping them to
|
||
* network (big-endian) byte order first.
|
||
*/
|
||
- (void) serializeInts: (int*)intBuffer
|
||
count: (unsigned int)numInts
|
||
{
|
||
unsigned i;
|
||
SEL sel = @selector(serializeInt:);
|
||
IMP imp = [self methodForSelector: sel];
|
||
|
||
for (i = 0; i < numInts; i++)
|
||
{
|
||
(*imp)(self, sel, intBuffer[i]);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Serialize one or more ints into this object's data buffer at index
|
||
* (replacing anything there currently), swapping them to network (big-endian)
|
||
* byte order first.
|
||
*/
|
||
- (void) serializeInts: (int*)intBuffer
|
||
count: (unsigned int)numInts
|
||
atIndex: (unsigned int)index
|
||
{
|
||
unsigned i;
|
||
SEL sel = @selector(serializeInt:atIndex:);
|
||
IMP imp = [self methodForSelector: sel];
|
||
|
||
for (i = 0; i < numInts; i++)
|
||
{
|
||
(*imp)(self, sel, intBuffer[i], index++);
|
||
}
|
||
}
|
||
|
||
@end
|
||
|
||
|
||
/**
|
||
* Provides some additional methods to [NSData].
|
||
*/
|
||
@implementation NSMutableData (GNUstepExtensions)
|
||
|
||
/**
|
||
* New instance with given shared memory ID.
|
||
*/
|
||
+ (id) dataWithShmID: (int)anID length: (unsigned int)length
|
||
{
|
||
#ifdef HAVE_SHMCTL
|
||
NSDataShared *d;
|
||
|
||
d = [NSMutableDataShared allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithShmID: anID length: length];
|
||
return AUTORELEASE(d);
|
||
#else
|
||
NSLog(@"[NSMutableData -dataWithSmdID:length:] no shared memory support");
|
||
return nil;
|
||
#endif
|
||
}
|
||
|
||
/**
|
||
* New instance with given bytes in shared memory.
|
||
*/
|
||
+ (id) dataWithSharedBytes: (const void*)bytes length: (unsigned int)length
|
||
{
|
||
NSData *d;
|
||
|
||
#ifdef HAVE_SHMCTL
|
||
d = [NSMutableDataShared allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytes: bytes length: length];
|
||
#else
|
||
d = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
d = [d initWithBytes: bytes length: length];
|
||
#endif
|
||
return AUTORELEASE(d);
|
||
}
|
||
|
||
/**
|
||
* Returns current capacity of data buffer.
|
||
*/
|
||
- (unsigned int) capacity
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* Sets current capacity of data buffer. Unlike [-setLength:], this will
|
||
* shrink the buffer if requested.
|
||
*/
|
||
- (id) setCapacity: (unsigned int)newCapacity
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
return nil;
|
||
}
|
||
|
||
/**
|
||
* Return shared memory ID, if using one, else -1.
|
||
*/
|
||
- (int) shmID
|
||
{
|
||
return -1;
|
||
}
|
||
|
||
- (void) serializeTypeTag: (unsigned char)tag
|
||
{
|
||
[self serializeDataAt: (void*)&tag
|
||
ofObjCType: @encode(unsigned char)
|
||
context: nil];
|
||
}
|
||
|
||
- (void) serializeTypeTag: (unsigned char)tag
|
||
andCrossRef: (unsigned int)xref
|
||
{
|
||
if (xref <= 0xff)
|
||
{
|
||
uint8_t x = (uint8_t)xref;
|
||
|
||
tag = (tag & ~_GSC_SIZE) | _GSC_X_1;
|
||
[self serializeDataAt: (void*)&tag
|
||
ofObjCType: @encode(unsigned char)
|
||
context: nil];
|
||
[self serializeDataAt: (void*)&x
|
||
ofObjCType: @encode(uint8_t)
|
||
context: nil];
|
||
}
|
||
else if (xref <= 0xffff)
|
||
{
|
||
uint16_t x = (uint16_t)xref;
|
||
|
||
tag = (tag & ~_GSC_SIZE) | _GSC_X_2;
|
||
[self serializeDataAt: (void*)&tag
|
||
ofObjCType: @encode(unsigned char)
|
||
context: nil];
|
||
[self serializeDataAt: (void*)&x
|
||
ofObjCType: @encode(uint16_t)
|
||
context: nil];
|
||
}
|
||
else
|
||
{
|
||
uint32_t x = (uint32_t)xref;
|
||
|
||
tag = (tag & ~_GSC_SIZE) | _GSC_X_4;
|
||
[self serializeDataAt: (void*)&tag
|
||
ofObjCType: @encode(unsigned char)
|
||
context: nil];
|
||
[self serializeDataAt: (void*)&x
|
||
ofObjCType: @encode(uint32_t)
|
||
context: nil];
|
||
}
|
||
}
|
||
@end
|
||
|
||
|
||
/*
|
||
* This is the top of the hierarchy of concrete implementations.
|
||
* As such, it contains efficient implementations of most methods.
|
||
*/
|
||
@implementation NSDataStatic
|
||
|
||
+ (id) allocWithZone: (NSZone*)z
|
||
{
|
||
return (NSData*)NSAllocateObject(self, 0, z);
|
||
}
|
||
|
||
/* Creation and Destruction of objects. */
|
||
|
||
- (id) copy
|
||
{
|
||
return RETAIN(self);
|
||
}
|
||
|
||
- (id) copyWithZone: (NSZone*)z
|
||
{
|
||
return RETAIN(self);
|
||
}
|
||
|
||
- (id) mutableCopy
|
||
{
|
||
return [[mutableDataMalloc allocWithZone: NSDefaultMallocZone()]
|
||
initWithBytes: bytes length: length];
|
||
}
|
||
|
||
- (id) mutableCopyWithZone: (NSZone*)z
|
||
{
|
||
return [[mutableDataMalloc allocWithZone: z]
|
||
initWithBytes: bytes length: length];
|
||
}
|
||
|
||
- (void) dealloc
|
||
{
|
||
bytes = 0;
|
||
length = 0;
|
||
[super dealloc];
|
||
}
|
||
|
||
- (id) initWithBytesNoCopy: (void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
freeWhenDone: (BOOL)shouldFree
|
||
{
|
||
bytes = aBuffer;
|
||
length = bufferSize;
|
||
return self;
|
||
}
|
||
|
||
- (Class) classForCoder
|
||
{
|
||
return dataMalloc; /* Will not be static data when decoded. */
|
||
}
|
||
|
||
/* Basic methods */
|
||
|
||
- (const void*) bytes
|
||
{
|
||
return bytes;
|
||
}
|
||
|
||
- (void) getBytes: (void*)buffer
|
||
range: (NSRange)aRange
|
||
{
|
||
GS_RANGE_CHECK(aRange, length);
|
||
memcpy(buffer, bytes + aRange.location, aRange.length);
|
||
}
|
||
|
||
- (unsigned int) length
|
||
{
|
||
return length;
|
||
}
|
||
|
||
static inline void
|
||
getBytes(void* dst, void* src, unsigned len, unsigned limit, unsigned *pos)
|
||
{
|
||
if (*pos > limit || len > limit || len+*pos > limit)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"Range: (%u, %u) Size: %d",
|
||
*pos, len, limit];
|
||
}
|
||
memcpy(dst, src + *pos, len);
|
||
*pos += len;
|
||
}
|
||
|
||
- (void) deserializeDataAt: (void*)data
|
||
ofObjCType: (const char*)type
|
||
atCursor: (unsigned int*)cursor
|
||
context: (id <NSObjCTypeSerializationCallBack>)callback
|
||
{
|
||
if (data == 0 || type == 0)
|
||
{
|
||
if (data == 0)
|
||
{
|
||
NSLog(@"attempt to deserialize to a null pointer");
|
||
}
|
||
if (type == 0)
|
||
{
|
||
NSLog(@"attempt to deserialize with a null type encoding");
|
||
}
|
||
return;
|
||
}
|
||
|
||
switch (*type)
|
||
{
|
||
case _C_ID:
|
||
{
|
||
[callback deserializeObjectAt: data
|
||
ofObjCType: type
|
||
fromData: self
|
||
atCursor: cursor];
|
||
return;
|
||
}
|
||
case _C_CHARPTR:
|
||
{
|
||
int32_t len;
|
||
|
||
[self deserializeBytes: &len
|
||
length: sizeof(len)
|
||
atCursor: cursor];
|
||
len = GSSwapBigI32ToHost(len);
|
||
if (len == -1)
|
||
{
|
||
*(const char**)data = 0;
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
#if GS_WITH_GC == 0
|
||
*(char**)data = (char*)NSZoneMalloc(NSDefaultMallocZone(), len+1);
|
||
#else
|
||
*(char**)data = (char*)NSZoneMalloc(GSAtomicMallocZone(), len+1);
|
||
#endif
|
||
if (*(char**)data == 0)
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"out of memory to deserialize bytes"];
|
||
}
|
||
}
|
||
getBytes(*(void**)data, bytes, len, length, cursor);
|
||
(*(char**)data)[len] = '\0';
|
||
return;
|
||
}
|
||
case _C_ARY_B:
|
||
{
|
||
unsigned offset = 0;
|
||
unsigned size;
|
||
unsigned count = atoi(++type);
|
||
unsigned i;
|
||
|
||
while (isdigit(*type))
|
||
{
|
||
type++;
|
||
}
|
||
size = objc_sizeof_type(type);
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
[self deserializeDataAt: (char*)data + offset
|
||
ofObjCType: type
|
||
atCursor: cursor
|
||
context: callback];
|
||
offset += size;
|
||
}
|
||
return;
|
||
}
|
||
case _C_STRUCT_B:
|
||
{
|
||
struct objc_struct_layout layout;
|
||
|
||
objc_layout_structure (type, &layout);
|
||
while (objc_layout_structure_next_member (&layout))
|
||
{
|
||
unsigned offset;
|
||
unsigned align;
|
||
const char *ftype;
|
||
|
||
objc_layout_structure_get_info (&layout, &offset, &align, &ftype);
|
||
|
||
[self deserializeDataAt: ((char*)data) + offset
|
||
ofObjCType: ftype
|
||
atCursor: cursor
|
||
context: callback];
|
||
}
|
||
return;
|
||
}
|
||
case _C_PTR:
|
||
{
|
||
unsigned len = objc_sizeof_type(++type);
|
||
|
||
#if GS_WITH_GC == 0
|
||
*(char**)data = (char*)NSZoneMalloc(NSDefaultMallocZone(), len);
|
||
#else
|
||
*(char**)data = (char*)NSZoneMalloc(GSAtomicMallocZone(), len);
|
||
if (*(char**)data == 0)
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"out of memory to deserialize bytes"];
|
||
}
|
||
#endif
|
||
[self deserializeDataAt: *(char**)data
|
||
ofObjCType: type
|
||
atCursor: cursor
|
||
context: callback];
|
||
return;
|
||
}
|
||
case _C_CHR:
|
||
case _C_UCHR:
|
||
{
|
||
getBytes(data, bytes, sizeof(unsigned char), length, cursor);
|
||
return;
|
||
}
|
||
case _C_SHT:
|
||
case _C_USHT:
|
||
{
|
||
unsigned short ns;
|
||
|
||
getBytes((void*)&ns, bytes, sizeof(ns), length, cursor);
|
||
*(unsigned short*)data = NSSwapBigShortToHost(ns);
|
||
return;
|
||
}
|
||
case _C_INT:
|
||
case _C_UINT:
|
||
{
|
||
unsigned ni;
|
||
|
||
getBytes((void*)&ni, bytes, sizeof(ni), length, cursor);
|
||
*(unsigned*)data = NSSwapBigIntToHost(ni);
|
||
return;
|
||
}
|
||
case _C_LNG:
|
||
case _C_ULNG:
|
||
{
|
||
unsigned long nl;
|
||
|
||
getBytes((void*)&nl, bytes, sizeof(nl), length, cursor);
|
||
*(unsigned long*)data = NSSwapBigLongToHost(nl);
|
||
return;
|
||
}
|
||
case _C_LNG_LNG:
|
||
case _C_ULNG_LNG:
|
||
{
|
||
unsigned long long nl;
|
||
|
||
getBytes((void*)&nl, bytes, sizeof(nl), length, cursor);
|
||
*(unsigned long long*)data = NSSwapBigLongLongToHost(nl);
|
||
return;
|
||
}
|
||
case _C_FLT:
|
||
{
|
||
NSSwappedFloat nf;
|
||
|
||
getBytes((void*)&nf, bytes, sizeof(nf), length, cursor);
|
||
*(float*)data = NSSwapBigFloatToHost(nf);
|
||
return;
|
||
}
|
||
case _C_DBL:
|
||
{
|
||
NSSwappedDouble nd;
|
||
|
||
getBytes((void*)&nd, bytes, sizeof(nd), length, cursor);
|
||
*(double*)data = NSSwapBigDoubleToHost(nd);
|
||
return;
|
||
}
|
||
case _C_CLASS:
|
||
{
|
||
uint16_t ni;
|
||
|
||
getBytes((void*)&ni, bytes, sizeof(ni), length, cursor);
|
||
ni = GSSwapBigI16ToHost(ni);
|
||
if (ni == 0)
|
||
{
|
||
*(Class*)data = 0;
|
||
}
|
||
else
|
||
{
|
||
char name[ni+1];
|
||
Class c;
|
||
|
||
getBytes((void*)name, bytes, ni, length, cursor);
|
||
name[ni] = '\0';
|
||
c = GSClassFromName(name);
|
||
if (c == 0)
|
||
{
|
||
NSLog(@"[%s %s] can't find class - %s",
|
||
GSNameFromClass([self class]),
|
||
GSNameFromSelector(_cmd), name);
|
||
}
|
||
*(Class*)data = c;
|
||
}
|
||
return;
|
||
}
|
||
case _C_SEL:
|
||
{
|
||
uint16_t ln;
|
||
uint16_t lt;
|
||
|
||
getBytes((void*)&ln, bytes, sizeof(ln), length, cursor);
|
||
ln = GSSwapBigI16ToHost(ln);
|
||
getBytes((void*)<, bytes, sizeof(lt), length, cursor);
|
||
lt = GSSwapBigI16ToHost(lt);
|
||
if (ln == 0)
|
||
{
|
||
*(SEL*)data = 0;
|
||
}
|
||
else
|
||
{
|
||
char name[ln+1];
|
||
char types[lt+1];
|
||
SEL sel;
|
||
|
||
getBytes((void*)name, bytes, ln, length, cursor);
|
||
name[ln] = '\0';
|
||
getBytes((void*)types, bytes, lt, length, cursor);
|
||
types[lt] = '\0';
|
||
|
||
if (lt)
|
||
{
|
||
sel = sel_get_typed_uid(name, types);
|
||
}
|
||
else
|
||
{
|
||
sel = sel_get_any_typed_uid(name);
|
||
}
|
||
if (sel == 0)
|
||
{
|
||
if (lt)
|
||
{
|
||
sel = sel_register_typed_name(name, types);
|
||
}
|
||
else
|
||
{
|
||
sel = sel_register_name(name);
|
||
}
|
||
if (sel == 0)
|
||
{
|
||
[NSException raise: NSInternalInconsistencyException
|
||
format: @"can't make sel with name '%s' "
|
||
@"and types '%s'", name, types];
|
||
}
|
||
}
|
||
*(SEL*)data = sel;
|
||
}
|
||
return;
|
||
}
|
||
default:
|
||
[NSException raise: NSGenericException
|
||
format: @"Unknown type to deserialize - '%s'", type];
|
||
}
|
||
}
|
||
|
||
- (void) deserializeTypeTag: (unsigned char*)tag
|
||
andCrossRef: (unsigned int*)ref
|
||
atCursor: (unsigned int*)cursor
|
||
{
|
||
if (*cursor >= length)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"Range: (%u, 1) Size: %d", *cursor, length];
|
||
}
|
||
*tag = *((unsigned char*)bytes + (*cursor)++);
|
||
if (*tag & _GSC_MAYX)
|
||
{
|
||
switch (*tag & _GSC_SIZE)
|
||
{
|
||
case _GSC_X_0:
|
||
{
|
||
return;
|
||
}
|
||
case _GSC_X_1:
|
||
{
|
||
if (*cursor >= length)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"Range: (%u, 1) Size: %d",
|
||
*cursor, length];
|
||
}
|
||
*ref = (unsigned int)*((unsigned char*)bytes + (*cursor)++);
|
||
return;
|
||
}
|
||
case _GSC_X_2:
|
||
{
|
||
uint16_t x;
|
||
|
||
if (*cursor >= length-1)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"Range: (%u, 1) Size: %d",
|
||
*cursor, length];
|
||
}
|
||
#if NEED_WORD_ALIGNMENT
|
||
if ((*cursor % __alignof__(uint16_t)) != 0)
|
||
memcpy(&x, (bytes + *cursor), 2);
|
||
else
|
||
#endif
|
||
x = *(uint16_t*)(bytes + *cursor);
|
||
*cursor += 2;
|
||
*ref = (unsigned int)GSSwapBigI16ToHost(x);
|
||
return;
|
||
}
|
||
default:
|
||
{
|
||
uint32_t x;
|
||
|
||
if (*cursor >= length-3)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"Range: (%u, 1) Size: %d",
|
||
*cursor, length];
|
||
}
|
||
#if NEED_WORD_ALIGNMENT
|
||
if ((*cursor % __alignof__(uint32_t)) != 0)
|
||
memcpy(&x, (bytes + *cursor), 4);
|
||
else
|
||
#endif
|
||
x = *(uint32_t*)(bytes + *cursor);
|
||
*cursor += 4;
|
||
*ref = (unsigned int)GSSwapBigI32ToHost(x);
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
@end
|
||
|
||
|
||
@implementation NSDataEmpty
|
||
- (void) dealloc
|
||
{
|
||
}
|
||
@end
|
||
|
||
|
||
@implementation NSDataMalloc
|
||
|
||
- (id) copy
|
||
{
|
||
if (NSShouldRetainWithZone(self, NSDefaultMallocZone()))
|
||
return RETAIN(self);
|
||
else
|
||
return [[dataMalloc allocWithZone: NSDefaultMallocZone()]
|
||
initWithBytes: bytes length: length];
|
||
}
|
||
|
||
- (id) copyWithZone: (NSZone*)z
|
||
{
|
||
if (NSShouldRetainWithZone(self, z))
|
||
return RETAIN(self);
|
||
else
|
||
return [[dataMalloc allocWithZone: z]
|
||
initWithBytes: bytes length: length];
|
||
}
|
||
|
||
- (void) dealloc
|
||
{
|
||
if (bytes != 0)
|
||
{
|
||
NSZoneFree(NSZoneFromPointer(bytes), bytes);
|
||
bytes = 0;
|
||
}
|
||
[super dealloc];
|
||
}
|
||
|
||
- (id) initWithBytesNoCopy: (void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
freeWhenDone: (BOOL)shouldFree
|
||
{
|
||
if (shouldFree == NO)
|
||
{
|
||
self->isa = dataStatic;
|
||
}
|
||
bytes = aBuffer;
|
||
length = bufferSize;
|
||
return self;
|
||
}
|
||
|
||
@end
|
||
|
||
#ifdef HAVE_MMAP
|
||
@implementation NSDataMappedFile
|
||
+ (id) allocWithZone: (NSZone*)z
|
||
{
|
||
return (NSData*)NSAllocateObject([NSDataMappedFile class], 0, z);
|
||
}
|
||
|
||
- (void) dealloc
|
||
{
|
||
if (bytes != 0)
|
||
{
|
||
munmap(bytes, length);
|
||
bytes = 0;
|
||
}
|
||
[super dealloc];
|
||
}
|
||
|
||
/**
|
||
* Initialize with data pointing to contents of file at path. Bytes are
|
||
* only "swapped in" as needed. File should not be moved or deleted for
|
||
* the life of this object.
|
||
*/
|
||
- (id) initWithContentsOfMappedFile: (NSString*)path
|
||
{
|
||
int fd;
|
||
|
||
#if defined(__MINGW32__)
|
||
const unichar *thePath = (const unichar*)[path filesystemRepresentation];
|
||
#else
|
||
const char *thePath = [path fileSystemRepresentation];
|
||
#endif
|
||
|
||
if (thePath == 0)
|
||
{
|
||
NSWarnMLog(@"Open (%@) attempt failed - bad path", path);
|
||
RELEASE(self);
|
||
return nil;
|
||
}
|
||
|
||
#if defined(__MINGW32__)
|
||
fd = _wopen(thePath, _O_RDONLY);
|
||
#else
|
||
fd = open(thePath, O_RDONLY);
|
||
#endif
|
||
if (fd < 0)
|
||
{
|
||
NSWarnMLog(@"unable to open %@ - %s", path, GSLastErrorStr(errno));
|
||
RELEASE(self);
|
||
return nil;
|
||
}
|
||
/* Find size of file to be mapped. */
|
||
length = lseek(fd, 0, SEEK_END);
|
||
if (length < 0)
|
||
{
|
||
NSWarnMLog(@"unable to seek to eof %@ - %s", path, GSLastErrorStr(errno));
|
||
close(fd);
|
||
RELEASE(self);
|
||
return nil;
|
||
}
|
||
/* Position at start of file. */
|
||
if (lseek(fd, 0, SEEK_SET) != 0)
|
||
{
|
||
NSWarnMLog(@"unable to seek to sof %@ - %s", path, GSLastErrorStr(errno));
|
||
close(fd);
|
||
RELEASE(self);
|
||
return nil;
|
||
}
|
||
bytes = mmap(0, length, PROT_READ, MAP_SHARED, fd, 0);
|
||
if (bytes == MAP_FAILED)
|
||
{
|
||
NSWarnMLog(@"mapping failed for %s - %s", path, GSLastErrorStr(errno));
|
||
close(fd);
|
||
RELEASE(self);
|
||
self = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
self = [self initWithContentsOfFile: path];
|
||
}
|
||
close(fd);
|
||
return self;
|
||
}
|
||
|
||
@end
|
||
#endif /* HAVE_MMAP */
|
||
|
||
#ifdef HAVE_SHMCTL
|
||
@implementation NSDataShared
|
||
+ (id) allocWithZone: (NSZone*)z
|
||
{
|
||
return (NSData*)NSAllocateObject([NSDataShared class], 0, z);
|
||
}
|
||
|
||
- (void) dealloc
|
||
{
|
||
if (bytes != 0)
|
||
{
|
||
struct shmid_ds buf;
|
||
|
||
if (shmctl(shmid, IPC_STAT, &buf) < 0)
|
||
NSLog(@"[NSDataShared -dealloc] shared memory control failed - %s",
|
||
GSLastErrorStr(errno));
|
||
else if (buf.shm_nattch == 1)
|
||
if (shmctl(shmid, IPC_RMID, &buf) < 0) /* Mark for deletion. */
|
||
NSLog(@"[NSDataShared -dealloc] shared memory delete failed - %s",
|
||
GSLastErrorStr(errno));
|
||
if (shmdt(bytes) < 0)
|
||
NSLog(@"[NSDataShared -dealloc] shared memory detach failed - %s",
|
||
GSLastErrorStr(errno));
|
||
bytes = 0;
|
||
length = 0;
|
||
shmid = -1;
|
||
}
|
||
[super dealloc];
|
||
}
|
||
|
||
- (id) initWithBytes: (const void*)aBuffer length: (unsigned int)bufferSize
|
||
{
|
||
shmid = -1;
|
||
if (aBuffer && bufferSize)
|
||
{
|
||
shmid = shmget(IPC_PRIVATE, bufferSize, IPC_CREAT|VM_RDONLY);
|
||
if (shmid == -1) /* Created memory? */
|
||
{
|
||
NSLog(@"[-initWithBytes:length:] shared mem get failed for %u - %s",
|
||
bufferSize, GSLastErrorStr(errno));
|
||
RELEASE(self);
|
||
self = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
return [self initWithBytes: aBuffer length: bufferSize];
|
||
}
|
||
|
||
bytes = shmat(shmid, 0, 0);
|
||
if (bytes == (void*)-1)
|
||
{
|
||
NSLog(@"[-initWithBytes:length:] shared mem attach failed for %u - %s",
|
||
bufferSize, GSLastErrorStr(errno));
|
||
bytes = 0;
|
||
RELEASE(self);
|
||
self = [dataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
return [self initWithBytes: aBuffer length: bufferSize];
|
||
}
|
||
length = bufferSize;
|
||
}
|
||
return self;
|
||
}
|
||
|
||
- (id) initWithShmID: (int)anId length: (unsigned int)bufferSize
|
||
{
|
||
struct shmid_ds buf;
|
||
|
||
shmid = anId;
|
||
if (shmctl(shmid, IPC_STAT, &buf) < 0)
|
||
{
|
||
NSLog(@"[NSDataShared -initWithShmID:length:] shared memory control failed - %s", GSLastErrorStr(errno));
|
||
RELEASE(self); /* Unable to access memory. */
|
||
return nil;
|
||
}
|
||
if (buf.shm_segsz < bufferSize)
|
||
{
|
||
NSLog(@"[NSDataShared -initWithShmID:length:] shared memory segment too small");
|
||
RELEASE(self); /* Memory segment too small. */
|
||
return nil;
|
||
}
|
||
bytes = shmat(shmid, 0, 0);
|
||
if (bytes == (void*)-1)
|
||
{
|
||
NSLog(@"[NSDataShared -initWithShmID:length:] shared memory attach failed - %s",
|
||
GSLastErrorStr(errno));
|
||
bytes = 0;
|
||
RELEASE(self); /* Unable to attach to memory. */
|
||
return nil;
|
||
}
|
||
length = bufferSize;
|
||
return self;
|
||
}
|
||
|
||
- (int) shmID
|
||
{
|
||
return shmid;
|
||
}
|
||
|
||
@end
|
||
#endif /* HAVE_SHMCTL */
|
||
|
||
|
||
@implementation NSMutableDataMalloc
|
||
+ (void) initialize
|
||
{
|
||
if (self == [NSMutableDataMalloc class])
|
||
{
|
||
GSObjCAddClassBehavior(self, [NSDataMalloc class]);
|
||
}
|
||
}
|
||
|
||
+ (id) allocWithZone: (NSZone*)z
|
||
{
|
||
return (NSData*)NSAllocateObject(mutableDataMalloc, 0, z);
|
||
}
|
||
|
||
- (Class) classForCoder
|
||
{
|
||
return mutableDataMalloc;
|
||
}
|
||
|
||
- (id) copy
|
||
{
|
||
return [[dataMalloc allocWithZone: NSDefaultMallocZone()]
|
||
initWithBytes: bytes length: length];
|
||
}
|
||
|
||
- (id) copyWithZone: (NSZone*)z
|
||
{
|
||
return [[dataMalloc allocWithZone: z]
|
||
initWithBytes: bytes length: length];
|
||
}
|
||
|
||
- (void) dealloc
|
||
{
|
||
if (bytes != 0)
|
||
{
|
||
if (zone != 0)
|
||
{
|
||
NSZoneFree(zone, bytes);
|
||
}
|
||
bytes = 0;
|
||
}
|
||
[super dealloc];
|
||
}
|
||
|
||
- (id) initWithBytes: (const void*)aBuffer length: (unsigned int)bufferSize
|
||
{
|
||
self = [self initWithCapacity: bufferSize];
|
||
if (self)
|
||
{
|
||
if (aBuffer && bufferSize > 0)
|
||
{
|
||
memcpy(bytes, aBuffer, bufferSize);
|
||
length = bufferSize;
|
||
}
|
||
}
|
||
return self;
|
||
}
|
||
|
||
- (id) initWithBytesNoCopy: (void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
freeWhenDone: (BOOL)shouldFree
|
||
{
|
||
if (aBuffer == 0)
|
||
{
|
||
self = [self initWithCapacity: bufferSize];
|
||
if (self != nil)
|
||
{
|
||
[self setLength: bufferSize];
|
||
}
|
||
return self;
|
||
}
|
||
self = [self initWithCapacity: 0];
|
||
if (self)
|
||
{
|
||
if (shouldFree == NO)
|
||
{
|
||
zone = 0; // Don't free this memory.
|
||
}
|
||
bytes = aBuffer;
|
||
length = bufferSize;
|
||
capacity = bufferSize;
|
||
growth = capacity/2;
|
||
if (growth == 0)
|
||
{
|
||
growth = 1;
|
||
}
|
||
}
|
||
return self;
|
||
}
|
||
|
||
// THIS IS THE DESIGNATED INITIALISER
|
||
/**
|
||
* Initialize with buffer capable of holding size bytes.
|
||
* <init/>
|
||
*/
|
||
- (id) initWithCapacity: (unsigned int)size
|
||
{
|
||
#if GS_WITH_GC
|
||
zone = GSAtomicMallocZone();
|
||
#else
|
||
zone = GSObjCZone(self);
|
||
#endif
|
||
if (size)
|
||
{
|
||
bytes = NSZoneMalloc(zone, size);
|
||
if (bytes == 0)
|
||
{
|
||
NSLog(@"[NSMutableDataMalloc -initWithCapacity:] out of memory "
|
||
@"for %u bytes - %s", size, GSLastErrorStr(errno));
|
||
RELEASE(self);
|
||
return nil;
|
||
}
|
||
}
|
||
capacity = size;
|
||
growth = capacity/2;
|
||
if (growth == 0)
|
||
{
|
||
growth = 1;
|
||
}
|
||
length = 0;
|
||
|
||
return self;
|
||
}
|
||
|
||
/**
|
||
* Initialize with buffer capable of holding size bytes. Buffer is zeroed
|
||
* out.
|
||
*/
|
||
- (id) initWithLength: (unsigned int)size
|
||
{
|
||
self = [self initWithCapacity: size];
|
||
if (self)
|
||
{
|
||
memset(bytes, '\0', size);
|
||
length = size;
|
||
}
|
||
return self;
|
||
}
|
||
|
||
- (id) initWithContentsOfFile: (NSString *)path
|
||
{
|
||
self = [self initWithCapacity: 0];
|
||
if (readContentsOfFile(path, &bytes, &length, zone) == NO)
|
||
{
|
||
DESTROY(self);
|
||
}
|
||
else
|
||
{
|
||
capacity = length;
|
||
}
|
||
return self;
|
||
}
|
||
|
||
- (id) initWithContentsOfMappedFile: (NSString *)path
|
||
{
|
||
return [self initWithContentsOfFile: path];
|
||
}
|
||
|
||
- (void) appendBytes: (const void*)aBuffer
|
||
length: (unsigned int)bufferSize
|
||
{
|
||
unsigned oldLength = length;
|
||
unsigned minimum = length + bufferSize;
|
||
|
||
if (minimum > capacity)
|
||
{
|
||
[self _grow: minimum];
|
||
}
|
||
memcpy(bytes + oldLength, aBuffer, bufferSize);
|
||
length = minimum;
|
||
}
|
||
|
||
- (unsigned int) capacity
|
||
{
|
||
return capacity;
|
||
}
|
||
|
||
- (void) _grow: (unsigned int)minimum
|
||
{
|
||
if (minimum > capacity)
|
||
{
|
||
unsigned nextCapacity = capacity + growth;
|
||
unsigned nextGrowth = capacity ? capacity : 1;
|
||
|
||
while (nextCapacity < minimum)
|
||
{
|
||
unsigned tmp = nextCapacity + nextGrowth;
|
||
|
||
nextGrowth = nextCapacity;
|
||
nextCapacity = tmp;
|
||
}
|
||
[self setCapacity: nextCapacity];
|
||
growth = nextGrowth;
|
||
}
|
||
}
|
||
|
||
- (void*) mutableBytes
|
||
{
|
||
return bytes;
|
||
}
|
||
|
||
- (void) replaceBytesInRange: (NSRange)aRange
|
||
withBytes: (const void*)moreBytes
|
||
{
|
||
unsigned need = NSMaxRange(aRange);
|
||
|
||
if (aRange.location > length)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"location bad in replaceByteInRange:withBytes:"];
|
||
}
|
||
if (aRange.length > 0)
|
||
{
|
||
if (need > length)
|
||
{
|
||
[self setCapacity: need];
|
||
length = need;
|
||
}
|
||
memcpy(bytes + aRange.location, moreBytes, aRange.length);
|
||
}
|
||
}
|
||
|
||
- (void) serializeDataAt: (const void*)data
|
||
ofObjCType: (const char*)type
|
||
context: (id <NSObjCTypeSerializationCallBack>)callback
|
||
{
|
||
if (data == 0 || type == 0)
|
||
{
|
||
if (data == 0)
|
||
{
|
||
NSLog(@"attempt to serialize from a null pointer");
|
||
}
|
||
if (type == 0)
|
||
{
|
||
NSLog(@"attempt to serialize with a null type encoding");
|
||
}
|
||
return;
|
||
}
|
||
switch (*type)
|
||
{
|
||
case _C_ID:
|
||
[callback serializeObjectAt: (id*)data
|
||
ofObjCType: type
|
||
intoData: self];
|
||
return;
|
||
|
||
case _C_CHARPTR:
|
||
{
|
||
unsigned len;
|
||
int32_t ni;
|
||
uint32_t minimum;
|
||
|
||
if (!*(void**)data)
|
||
{
|
||
ni = -1;
|
||
ni = GSSwapHostI32ToBig(ni);
|
||
[self appendBytes: (void*)&len length: sizeof(len)];
|
||
return;
|
||
}
|
||
len = strlen(*(void**)data);
|
||
ni = GSSwapHostI32ToBig(len);
|
||
minimum = length + len + sizeof(ni);
|
||
if (minimum > capacity)
|
||
{
|
||
[self _grow: minimum];
|
||
}
|
||
memcpy(bytes+length, &ni, sizeof(ni));
|
||
length += sizeof(ni);
|
||
if (len)
|
||
{
|
||
memcpy(bytes+length, *(void**)data, len);
|
||
length += len;
|
||
}
|
||
return;
|
||
}
|
||
case _C_ARY_B:
|
||
{
|
||
unsigned offset = 0;
|
||
unsigned size;
|
||
unsigned count = atoi(++type);
|
||
unsigned i;
|
||
uint32_t minimum;
|
||
|
||
while (isdigit(*type))
|
||
{
|
||
type++;
|
||
}
|
||
size = objc_sizeof_type(type);
|
||
|
||
/*
|
||
* Serialized objects are going to take up at least as much
|
||
* space as the originals, so we can calculate a minimum space
|
||
* we are going to need and make sure our buffer is big enough.
|
||
*/
|
||
minimum = length + size*count;
|
||
if (minimum > capacity)
|
||
{
|
||
[self _grow: minimum];
|
||
}
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
[self serializeDataAt: (char*)data + offset
|
||
ofObjCType: type
|
||
context: callback];
|
||
offset += size;
|
||
}
|
||
return;
|
||
}
|
||
case _C_STRUCT_B:
|
||
{
|
||
struct objc_struct_layout layout;
|
||
|
||
objc_layout_structure (type, &layout);
|
||
while (objc_layout_structure_next_member (&layout))
|
||
{
|
||
unsigned offset;
|
||
unsigned align;
|
||
const char *ftype;
|
||
|
||
objc_layout_structure_get_info (&layout, &offset, &align, &ftype);
|
||
|
||
[self serializeDataAt: ((char*)data) + offset
|
||
ofObjCType: ftype
|
||
context: callback];
|
||
}
|
||
return;
|
||
}
|
||
case _C_PTR:
|
||
[self serializeDataAt: *(char**)data
|
||
ofObjCType: ++type
|
||
context: callback];
|
||
return;
|
||
case _C_CHR:
|
||
case _C_UCHR:
|
||
(*appendImp)(self, appendSel, data, sizeof(unsigned char));
|
||
return;
|
||
case _C_SHT:
|
||
case _C_USHT:
|
||
{
|
||
unsigned short ns = NSSwapHostShortToBig(*(unsigned short*)data);
|
||
(*appendImp)(self, appendSel, &ns, sizeof(unsigned short));
|
||
return;
|
||
}
|
||
case _C_INT:
|
||
case _C_UINT:
|
||
{
|
||
unsigned ni = NSSwapHostIntToBig(*(unsigned int*)data);
|
||
(*appendImp)(self, appendSel, &ni, sizeof(unsigned));
|
||
return;
|
||
}
|
||
case _C_LNG:
|
||
case _C_ULNG:
|
||
{
|
||
unsigned long nl = NSSwapHostLongToBig(*(unsigned long*)data);
|
||
(*appendImp)(self, appendSel, &nl, sizeof(unsigned long));
|
||
return;
|
||
}
|
||
case _C_LNG_LNG:
|
||
case _C_ULNG_LNG:
|
||
{
|
||
unsigned long long nl;
|
||
|
||
nl = NSSwapHostLongLongToBig(*(unsigned long long*)data);
|
||
(*appendImp)(self, appendSel, &nl, sizeof(unsigned long long));
|
||
return;
|
||
}
|
||
case _C_FLT:
|
||
{
|
||
NSSwappedFloat nf = NSSwapHostFloatToBig(*(float*)data);
|
||
(*appendImp)(self, appendSel, &nf, sizeof(NSSwappedFloat));
|
||
return;
|
||
}
|
||
case _C_DBL:
|
||
{
|
||
NSSwappedDouble nd = NSSwapHostDoubleToBig(*(double*)data);
|
||
(*appendImp)(self, appendSel, &nd, sizeof(NSSwappedDouble));
|
||
return;
|
||
}
|
||
case _C_CLASS:
|
||
{
|
||
const char *name = *(Class*)data?GSNameFromClass(*(Class*)data):"";
|
||
uint16_t ln = (uint16_t)strlen(name);
|
||
uint32_t minimum = length + ln + sizeof(uint16_t);
|
||
uint16_t ni;
|
||
|
||
if (minimum > capacity)
|
||
{
|
||
[self _grow: minimum];
|
||
}
|
||
ni = GSSwapHostI16ToBig(ln);
|
||
memcpy(bytes+length, &ni, sizeof(ni));
|
||
length += sizeof(ni);
|
||
if (ln)
|
||
{
|
||
memcpy(bytes+length, name, ln);
|
||
length += ln;
|
||
}
|
||
return;
|
||
}
|
||
case _C_SEL:
|
||
{
|
||
const char *name = *(SEL*)data?GSNameFromSelector(*(SEL*)data):"";
|
||
uint16_t ln = (name == 0) ? 0 : (uint16_t)strlen(name);
|
||
const char *types = *(SEL*)data?GSTypesFromSelector(*(SEL*)data):"";
|
||
uint16_t lt = (types == 0) ? 0 : (uint16_t)strlen(types);
|
||
uint32_t minimum = length + ln + lt + 2*sizeof(uint16_t);
|
||
uint16_t ni;
|
||
|
||
if (minimum > capacity)
|
||
{
|
||
[self _grow: minimum];
|
||
}
|
||
ni = GSSwapHostI16ToBig(ln);
|
||
memcpy(bytes+length, &ni, sizeof(ni));
|
||
length += sizeof(ni);
|
||
ni = GSSwapHostI16ToBig(lt);
|
||
memcpy(bytes+length, &ni, sizeof(ni));
|
||
length += sizeof(ni);
|
||
if (ln)
|
||
{
|
||
memcpy(bytes+length, name, ln);
|
||
length += ln;
|
||
}
|
||
if (lt)
|
||
{
|
||
memcpy(bytes+length, types, lt);
|
||
length += lt;
|
||
}
|
||
return;
|
||
}
|
||
default:
|
||
[NSException raise: NSMallocException
|
||
format: @"Unknown type to serialize - '%s'", type];
|
||
}
|
||
}
|
||
|
||
- (void) serializeTypeTag: (unsigned char)tag
|
||
{
|
||
if (length == capacity)
|
||
{
|
||
[self _grow: length + 1];
|
||
}
|
||
((unsigned char*)bytes)[length++] = tag;
|
||
}
|
||
|
||
- (void) serializeTypeTag: (unsigned char)tag
|
||
andCrossRef: (unsigned int)xref
|
||
{
|
||
if (xref <= 0xff)
|
||
{
|
||
tag = (tag & ~_GSC_SIZE) | _GSC_X_1;
|
||
if (length + 2 >= capacity)
|
||
{
|
||
[self _grow: length + 2];
|
||
}
|
||
*(uint8_t*)(bytes + length++) = tag;
|
||
*(uint8_t*)(bytes + length++) = xref;
|
||
}
|
||
else if (xref <= 0xffff)
|
||
{
|
||
uint16_t x = (uint16_t)xref;
|
||
|
||
tag = (tag & ~_GSC_SIZE) | _GSC_X_2;
|
||
if (length + 3 >= capacity)
|
||
{
|
||
[self _grow: length + 3];
|
||
}
|
||
*(uint8_t*)(bytes + length++) = tag;
|
||
#if NEED_WORD_ALIGNMENT
|
||
if ((length % __alignof__(uint16_t)) != 0)
|
||
{
|
||
x = GSSwapHostI16ToBig(x);
|
||
memcpy((bytes + length), &x, 2);
|
||
}
|
||
else
|
||
#endif
|
||
*(uint16_t*)(bytes + length) = GSSwapHostI16ToBig(x);
|
||
length += 2;
|
||
}
|
||
else
|
||
{
|
||
uint32_t x = (uint32_t)xref;
|
||
|
||
tag = (tag & ~_GSC_SIZE) | _GSC_X_4;
|
||
if (length + 5 >= capacity)
|
||
{
|
||
[self _grow: length + 5];
|
||
}
|
||
*(uint8_t*)(bytes + length++) = tag;
|
||
#if NEED_WORD_ALIGNMENT
|
||
if ((length % __alignof__(uint32_t)) != 0)
|
||
{
|
||
x = GSSwapHostI32ToBig(x);
|
||
memcpy((bytes + length), &x, 4);
|
||
}
|
||
else
|
||
#endif
|
||
*(uint32_t*)(bytes + length) = GSSwapHostI32ToBig(x);
|
||
length += 4;
|
||
}
|
||
}
|
||
|
||
- (id) setCapacity: (unsigned int)size
|
||
{
|
||
if (size != capacity)
|
||
{
|
||
void* tmp;
|
||
|
||
if (bytes)
|
||
{
|
||
if (zone == 0)
|
||
{
|
||
#if GS_WITH_GC
|
||
zone = GSAtomicMallocZone();
|
||
#else
|
||
zone = GSObjCZone(self);
|
||
#endif
|
||
tmp = NSZoneMalloc(zone, size);
|
||
if (tmp == 0)
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"Unable to set data capacity to '%d'", size];
|
||
}
|
||
memcpy(tmp, bytes, capacity < size ? capacity : size);
|
||
}
|
||
else
|
||
{
|
||
tmp = NSZoneRealloc(zone, bytes, size);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (zone == 0)
|
||
{
|
||
#if GS_WITH_GC
|
||
zone = GSAtomicMallocZone();
|
||
#else
|
||
zone = GSObjCZone(self);
|
||
#endif
|
||
}
|
||
tmp = NSZoneMalloc(zone, size);
|
||
}
|
||
if (tmp == 0)
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"Unable to set data capacity to '%d'", size];
|
||
}
|
||
bytes = tmp;
|
||
capacity = size;
|
||
growth = capacity/2;
|
||
if (growth == 0)
|
||
{
|
||
growth = 1;
|
||
}
|
||
}
|
||
if (size < length)
|
||
{
|
||
length = size;
|
||
}
|
||
return self;
|
||
}
|
||
|
||
- (void) setData: (NSData*)data
|
||
{
|
||
unsigned l = [data length];
|
||
|
||
[self setCapacity: l];
|
||
length = l;
|
||
memcpy(bytes, [data bytes], length);
|
||
}
|
||
|
||
- (void) setLength: (unsigned int)size
|
||
{
|
||
if (size > capacity)
|
||
{
|
||
[self setCapacity: size];
|
||
}
|
||
if (size > length)
|
||
{
|
||
memset(bytes + length, '\0', size - length);
|
||
}
|
||
length = size;
|
||
}
|
||
|
||
@end
|
||
|
||
|
||
#ifdef HAVE_SHMCTL
|
||
@implementation NSMutableDataShared
|
||
+ (id) allocWithZone: (NSZone*)z
|
||
{
|
||
return (NSData*)NSAllocateObject([NSMutableDataShared class], 0, z);
|
||
}
|
||
|
||
- (void) dealloc
|
||
{
|
||
if (bytes != 0)
|
||
{
|
||
struct shmid_ds buf;
|
||
|
||
if (shmctl(shmid, IPC_STAT, &buf) < 0)
|
||
{
|
||
NSLog(@"[NSMutableDataShared -dealloc] shared memory "
|
||
@"control failed - %s", GSLastErrorStr(errno));
|
||
}
|
||
else if (buf.shm_nattch == 1)
|
||
{
|
||
if (shmctl(shmid, IPC_RMID, &buf) < 0) /* Mark for deletion. */
|
||
{
|
||
NSLog(@"[NSMutableDataShared -dealloc] shared memory "
|
||
@"delete failed - %s", GSLastErrorStr(errno));
|
||
}
|
||
}
|
||
if (shmdt(bytes) < 0)
|
||
{
|
||
NSLog(@"[NSMutableDataShared -dealloc] shared memory "
|
||
@"detach failed - %s", GSLastErrorStr(errno));
|
||
}
|
||
bytes = 0;
|
||
length = 0;
|
||
capacity = 0;
|
||
shmid = -1;
|
||
}
|
||
[super dealloc];
|
||
}
|
||
|
||
- (id) initWithBytes: (const void*)aBuffer length: (unsigned int)bufferSize
|
||
{
|
||
self = [self initWithCapacity: bufferSize];
|
||
if (self)
|
||
{
|
||
if (bufferSize && aBuffer)
|
||
memcpy(bytes, aBuffer, bufferSize);
|
||
length = bufferSize;
|
||
}
|
||
return self;
|
||
}
|
||
|
||
- (id) initWithCapacity: (unsigned int)bufferSize
|
||
{
|
||
int e;
|
||
|
||
shmid = shmget(IPC_PRIVATE, bufferSize, IPC_CREAT|VM_ACCESS);
|
||
if (shmid == -1) /* Created memory? */
|
||
{
|
||
NSLog(@"[NSMutableDataShared -initWithCapacity:] shared memory "
|
||
@"get failed for %u - %s", bufferSize, GSLastErrorStr(errno));
|
||
RELEASE(self);
|
||
self = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
return [self initWithCapacity: bufferSize];
|
||
}
|
||
|
||
bytes = shmat(shmid, 0, 0);
|
||
e = errno;
|
||
if (bytes == (void*)-1)
|
||
{
|
||
NSLog(@"[NSMutableDataShared -initWithCapacity:] shared memory "
|
||
@"attach failed for %u - %s", bufferSize, GSLastErrorStr(e));
|
||
bytes = 0;
|
||
RELEASE(self);
|
||
self = [mutableDataMalloc allocWithZone: NSDefaultMallocZone()];
|
||
return [self initWithCapacity: bufferSize];
|
||
}
|
||
length = 0;
|
||
capacity = bufferSize;
|
||
|
||
return self;
|
||
}
|
||
|
||
- (id) initWithShmID: (int)anId length: (unsigned int)bufferSize
|
||
{
|
||
struct shmid_ds buf;
|
||
|
||
shmid = anId;
|
||
if (shmctl(shmid, IPC_STAT, &buf) < 0)
|
||
{
|
||
NSLog(@"[NSMutableDataShared -initWithShmID:length:] shared memory "
|
||
@"control failed - %s", GSLastErrorStr(errno));
|
||
RELEASE(self); /* Unable to access memory. */
|
||
return nil;
|
||
}
|
||
if (buf.shm_segsz < bufferSize)
|
||
{
|
||
NSLog(@"[NSMutableDataShared -initWithShmID:length:] shared memory "
|
||
@"segment too small");
|
||
RELEASE(self); /* Memory segment too small. */
|
||
return nil;
|
||
}
|
||
bytes = shmat(shmid, 0, 0);
|
||
if (bytes == (void*)-1)
|
||
{
|
||
NSLog(@"[NSMutableDataShared -initWithShmID:length:] shared memory "
|
||
@"attach failed - %s", GSLastErrorStr(errno));
|
||
bytes = 0;
|
||
RELEASE(self); /* Unable to attach to memory. */
|
||
return nil;
|
||
}
|
||
length = bufferSize;
|
||
capacity = length;
|
||
|
||
return self;
|
||
}
|
||
|
||
- (id) setCapacity: (unsigned int)size
|
||
{
|
||
if (size != capacity)
|
||
{
|
||
void *tmp;
|
||
int newid;
|
||
|
||
newid = shmget(IPC_PRIVATE, size, IPC_CREAT|VM_ACCESS);
|
||
if (newid == -1) /* Created memory? */
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"Unable to create shared memory segment (size:%u) - %s.",
|
||
size, GSLastErrorStr(errno)];
|
||
}
|
||
tmp = shmat(newid, 0, 0);
|
||
if ((intptr_t)tmp == -1) /* Attached memory? */
|
||
{
|
||
[NSException raise: NSMallocException
|
||
format: @"Unable to attach to shared memory segment."];
|
||
}
|
||
memcpy(tmp, bytes, length);
|
||
if (bytes)
|
||
{
|
||
struct shmid_ds buf;
|
||
|
||
if (shmctl(shmid, IPC_STAT, &buf) < 0)
|
||
{
|
||
NSLog(@"[NSMutableDataShared -setCapacity:] shared memory "
|
||
@"control failed - %s", GSLastErrorStr(errno));
|
||
}
|
||
else if (buf.shm_nattch == 1)
|
||
{
|
||
if (shmctl(shmid, IPC_RMID, &buf) < 0) /* Mark for deletion. */
|
||
{
|
||
NSLog(@"[NSMutableDataShared -setCapacity:] shared memory "
|
||
@"delete failed - %s", GSLastErrorStr(errno));
|
||
}
|
||
}
|
||
if (shmdt(bytes) < 0) /* Detach memory. */
|
||
{
|
||
NSLog(@"[NSMutableDataShared -setCapacity:] shared memory "
|
||
@"detach failed - %s", GSLastErrorStr(errno));
|
||
}
|
||
}
|
||
bytes = tmp;
|
||
shmid = newid;
|
||
capacity = size;
|
||
}
|
||
if (size < length)
|
||
{
|
||
length = size;
|
||
}
|
||
return self;
|
||
}
|
||
|
||
- (int) shmID
|
||
{
|
||
return shmid;
|
||
}
|
||
|
||
@end
|
||
#endif /* HAVE_SHMCTL */
|
||
|