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Copyright Fix
Description:
Switched the copyright statements from the old, bad version to the
new version we got from the lawyers. Note: not every file was
changed. There are some files which have copyrights not to NCSA (see
the Stream VFD and some of the GIF conversion modules didn't have
copyrights, so I didn't know if they were from others or from us). I
left those alone. If others think they should be changed, please
feel free to do so.
Platforms tested:
Linux
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Purpose:
Bug Fix
Description:
When compiling with a C++ compiler, the compiler would balk at
finding some file drivers.
Solution:
We need to put this:
#ifdef __cplusplus
extern "C" {
#endif
/* ... */
#ifdef __cplusplus
}
#endif
around function declarations.
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Code Update
Description:
Ported change from the 1.5 branch to the 1.4 branch where all HDF5
include files are in quotes instead of angle brackets:
#include "hdf5_file.h"
instead of
#include <hdf5_file.h>
Platforms tested:
Linux
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Bug fix
Description:
IMPORTANT! IMPORTANT! IMPORTANT!
A case where metadata in a file could get corrupted in certain unusual
sitations was detected and fixed.
In certain circumstances, metadata could get cached in the raw data cache,
and if that particular piece of metadata was updated on disk while
incorrectly cached, the new metadata would get overwritten with the stale
metadata from the raw data cache when it was flushed out.
Additionally, I've patched up the raw data cache to be smarter about how
much it caches and how much I/O it triggers, leading to some speedups.
Solution:
Changed the raw data I/O routines which perform caching to require a
parameter with the size of the dataset being accessed and limited the
cache to no more than that many bytes.
Platforms tested:
FreeBSD 4.3 (hawkwind)
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Maintainance & performance enhancements
Description:
Re-arranged header files to protect private symbols better.
Changed optimized regular hyperslab I/O to compute the offsets more
efficiently from previous method of using matrix operations.
Added sequential I/O operations at a more abstract level (at the same level
as H5F_arr_read/write), to support the optimized hyperslab I/O.
Platforms tested:
Solaris 2.6 (baldric) & FreeBSD 4.1.1 (hawkwind)
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logging and added
test code for aggregating metadata into more localized locations in the file.
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useful for
tracking the actual I/O locations and space used in a file during an
application.
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