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Merged
ehennestad merged 2 commits into from
Sep 18, 2026
Merged

fix(stack): initialize binary files on Linux #140

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fix(stack): initialize binary files on Linux
ehennestad Sep 18, 2026
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Update GitHub badges [skip ci]
github-actions[bot] Sep 18, 2026
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2 changes: 1 addition & 1 deletion .github/badges/tests.svg
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17 changes: 13 additions & 4 deletions code/datatypes/+nansen/+stack/+virtual/Binary.m
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Original file line number Diff line number Diff line change
Expand Up @@ -360,16 +360,25 @@ function initializeFile(filePath, arraySize, arrayClass)
numBytes = nansen.stack.ImageStack.getImageDataByteSize(...
arraySize, arrayClass);

% On Windows, fsutil preallocates the file without writing
% its contents. Every other platform, and a failed fsutil
% call, falls back to writing a sparse file with fwrite.
status = 1;
if ispc
[status, ~] = system(sprintf('cmd /C fsutil file createnew %s %i', filePath, numBytes));
elseif ismac
status = 1;
end

if status % Backup solution
fileId = fopen(filePath, 'w');
[fileId, errorMessage] = fopen(filePath, 'w');
if fileId == -1
error('NANSEN:Stack:Binary:FileNotCreated', ...
['Could not create the binary file "%s": %s. ', ...
'Check that the folder exists and is writable.'], ...
filePath, errorMessage)
end
fileCleanup = onCleanup(@() fclose(fileId));
fwrite(fileId, 0, 'uint8', numBytes-1); % 4th arg: skip
fclose(fileId);
clear fileCleanup % Close the file before it is mapped
end

else
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