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- (instancetype)initWithMemoryAddress: (void *)address
size: (size_t)size
writable: (bool)writable
{
self = [super init];
@try {
if (size > SSIZE_MAX || (ssize_t)size != (OFFileOffset)size)
@throw [OFOutOfRangeException exception];
_address = address;
_size = size;
_writable = writable;
} @catch (id e) {
[self release];
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- (instancetype)initWithMemoryAddress: (void *)address
size: (size_t)size
writable: (bool)writable
{
self = [super init];
@try {
if (size > SSIZE_MAX || (ssize_t)size != (OFStreamOffset)size)
@throw [OFOutOfRangeException exception];
_address = address;
_size = size;
_writable = writable;
} @catch (id e) {
[self release];
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}
- (bool)lowlevelIsAtEndOfStream
{
return (_position == _size);
}
- (OFFileOffset)lowlevelSeekToOffset: (OFFileOffset)offset whence: (int)whence
{
OFFileOffset new;
switch (whence) {
case SEEK_SET:
new = offset;
break;
case SEEK_CUR:
new = (OFFileOffset)_position + offset;
break;
case SEEK_END:
new = (OFFileOffset)_size + offset;
break;
default:
@throw [OFInvalidArgumentException exception];
}
if (new < 0 || new > (OFFileOffset)_size)
@throw [OFSeekFailedException exceptionWithStream: self
offset: offset
whence: whence
errNo: EINVAL];
return (_position = (size_t)new);
}
@end
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>
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}
- (bool)lowlevelIsAtEndOfStream
{
return (_position == _size);
}
- (OFStreamOffset)lowlevelSeekToOffset: (OFStreamOffset)offset
whence: (int)whence
{
OFStreamOffset new;
switch (whence) {
case SEEK_SET:
new = offset;
break;
case SEEK_CUR:
new = (OFStreamOffset)_position + offset;
break;
case SEEK_END:
new = (OFStreamOffset)_size + offset;
break;
default:
@throw [OFInvalidArgumentException exception];
}
if (new < 0 || new > (OFStreamOffset)_size)
@throw [OFSeekFailedException exceptionWithStream: self
offset: offset
whence: whence
errNo: EINVAL];
return (_position = (size_t)new);
}
@end
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