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usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
file1 File name of the first HDF5 file
file2 File name of the second HDF5 file
[obj1] Name of an HDF5 object, in absolute path
[obj2] Name of an HDF5 object, in absolute path
OPTIONS
-h, --help Print a usage message and exit.
-V, --version Print version number and exit.
-r, --report Report mode. Print differences.
-v, --verbose Verbose mode. Print differences, list of objects.
-q, --quiet Quiet mode. Do not produce output.
--follow-links Follow symbolic links (soft links and external links)
and compare the links' target objects.
If symbolic link(s) with the same name exist in the
files being compared, then determine whether the
target of each link is an existing object (dataset,
group, or named datatype) or the link is a dangling
link (a soft or external link pointing to a target
object that does not yet exist).
- If both symbolic links are dangling links, they
are treated as being the same; by default, h5diff
returns an exit code of 0. If, however,
--no-dangling-links is used with --follow-links,
this situation is treated as an error and h5diff
returns an exit code of 2.
- If only one of the two links is a dangling link,
they are treated as being different and h5diff
returns an exit code of 1. If, however,
--no-dangling-links is used with --follow-links,
this situation is treated as an error and h5diff
returns an exit code of 2.
- If both symbolic links point to existing objects,
h5diff compares the two objects.
If any symbolic link specified in the call to h5diff
does not exist, h5diff treats it as an error and
returns an exit code of 2.
--no-dangling-links Must be used with --follow-links option;
otherwise, h5diff shows error message and returns
an exit code of 2.
Check for any symbolic links (soft links or external
links) that do not resolve to an existing object
(dataset, group, or named datatype). If any
dangling link is found, this situation is treated as
an error and h5diff returns an exit code of 2.
-c, --compare List objects that are not comparable
-N, --nan Avoid NaNs detection
-n C, --count=C Print differences up to C number, C is a positive
integer.
-d D, --delta=D Print difference if (|a-b| > D), D is a positive
number.
-p R, --relative=R Print difference if (|(a-b)/b| > R), R is a positive
number.
--use-system-epsilon Print difference if (|a-b| > EPSILON),
where EPSILON (FLT_EPSILON or FLT_EPSILON) is the
system epsilon value.
If the system epsilon is not defined, use the value
below:
FLT_EPSILON = 1.19209E-07 for float
DBL_EPSILON = 2.22045E-16 for double
-d, -p, and --use-system-epsilon options are used for
comparing floating point values.
By default, strict equality is used. Use -p or -d to
set specific tolerance.
Modes of output:
Default mode: print the number of differences found and where they occured
-r Report mode: print the above plus the differences
-v Verbose mode: print the above plus a list of objects and warnings
-q Quiet mode: do not print output
Compare criteria
If no objects [obj1[obj2]] are specified, h5diff only compares objects
with the same absolute path in both files
The compare criteria is:
1) datasets: numerical array differences
2) groups: name string difference
3) datatypes: the return value of H5Tequal
4) links: name string difference of the linked value as default
(refer to --follow-links option).
Exit code:
0 if no differences, 1 if differences found, 2 if error
Examples of use:
1) h5diff file1 file2 /g1/dset1 /g1/dset2
Compares object '/g1/dset1' in file1 with '/g1/dset2' in file2
2) h5diff file1 file2 /g1/dset1
Compares object '/g1/dset1' in both files
3) h5diff file1 file2
Compares all objects in both files
Notes:
file1 and file2 can be the same file.
Use h5diff file1 file1 /g1/dset1 /g1/dset2 to compare
'/g1/dset1' and '/g1/dset2' in the same file
h5diff error: missing file names
EXIT CODE: 1
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