681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
|
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
|
-
+
-
-
+
+
-
-
+
+
-
+
-
+
-
+
|
self = [super init];
fd = fileDescriptor;
return self;
}
- (BOOL)_isAtEndOfStream
- (BOOL)lowlevelIsAtEndOfStream
{
if (fd == -1)
return YES;
return atEndOfStream;
}
- (size_t)_readIntoBuffer: (void*)buffer
length: (size_t)length
- (size_t)lowlevelReadIntoBuffer: (void*)buffer
length: (size_t)length
{
ssize_t ret;
if (fd == -1 || atEndOfStream || (ret = read(fd, buffer, length)) < 0)
@throw [OFReadFailedException exceptionWithClass: [self class]
stream: self
requestedLength: length];
if (ret == 0)
atEndOfStream = YES;
return ret;
}
- (void)_writeBuffer: (const void*)buffer
length: (size_t)length
- (void)lowlevelWriteBuffer: (const void*)buffer
length: (size_t)length
{
if (fd == -1 || atEndOfStream || write(fd, buffer, length) < length)
@throw [OFWriteFailedException exceptionWithClass: [self class]
stream: self
requestedLength: length];
}
- (void)_seekToOffset: (off_t)offset
- (void)lowlevelSeekToOffset: (off_t)offset
{
if (lseek(fd, offset, SEEK_SET) == -1)
@throw [OFSeekFailedException exceptionWithClass: [self class]
stream: self
offset: offset
whence: SEEK_SET];
}
- (off_t)_seekForwardWithOffset: (off_t)offset
- (off_t)lowlevelSeekForwardWithOffset: (off_t)offset
{
off_t ret;
if ((ret = lseek(fd, offset, SEEK_CUR)) == -1)
@throw [OFSeekFailedException exceptionWithClass: [self class]
stream: self
offset: offset
whence: SEEK_CUR];
return ret;
}
- (off_t)_seekToOffsetRelativeToEnd: (off_t)offset
- (off_t)lowlevelSeekToOffsetRelativeToEnd: (off_t)offset
{
off_t ret;
if ((ret = lseek(fd, offset, SEEK_END)) == -1)
@throw [OFSeekFailedException exceptionWithClass: [self class]
stream: self
offset: offset
|
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
|
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
|
-
+
-
+
-
+
|
- (void)dealloc
{
@throw [OFNotImplementedException exceptionWithClass: [self class]
selector: _cmd];
[super dealloc]; /* Get rid of stupid warning */
}
- (void)_seekToOffset: (off_t)offset
- (void)lowlevelSeekToOffset: (off_t)offset
{
@throw [OFNotImplementedException exceptionWithClass: [self class]
selector: _cmd];
}
- (off_t)_seekForwardWithOffset: (off_t)offset
- (off_t)lowlevelSeekForwardWithOffset: (off_t)offset
{
@throw [OFNotImplementedException exceptionWithClass: [self class]
selector: _cmd];
}
- (off_t)_seekToOffsetRelativeToEnd: (off_t)offset
- (off_t)lowlevelSeekToOffsetRelativeToEnd: (off_t)offset
{
@throw [OFNotImplementedException exceptionWithClass: [self class]
selector: _cmd];
}
@end
|