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feat: get_file_size - gets the size of a file in bytes
#1029
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We have not used get_* patterns anywhere else so, this function may perhaps just be file_size? The fact that it is a function already means we're get_ting stuff.
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This functionality can be achieved by Fortran intrinsics only. Perhaps that would be a good way to avoid cross-platform CI issues and avoid the C backend calls?
User facing function added is
get_file_size(path [, err])It returns the file size in bytes. It returns an error if the
pathis a directory or a symlink to a directory (because for the size of directories you will need to recurse into the directory and add all its component sizes to get its actual size)It uses
statand_stati64on POSIX and windows respectively. It returns an integer ofkindint64to handle large enough file sizes.