Add sparse_file_len, which will compute the size of data that would
be produced if sparse_file_write was called. Useful combined with
sparse_file_callback.
Change-Id: I1a156d1071760f5559483954a5c62ffc20298703
Add sparse_file_repsarse, which splits chunks in an existing sparse
file such that the maximum size of a chunk, plus a header and footer,
is smaller than the given size. This will allow multiple smaller
sparse files to result in the same data as a large sparse file.
Change-Id: I177abdb958a23d5afd394ff265c5b0c6a3ff22fa
Add a new output file subclass that will call a callback for
each block as it is written. Will be used to measure the space
used by each sparse block to allow resparsing files.
Also add sparse_file_callback, which will write out a sparse
file by calling the provided write function.
Change-Id: I18707bd9c357b68da319cc07982e93d1c2b2bee2
Abstract the logic from simg2img into libsparse, and add logic
for reading a regular image into libsparse. simg2img then
becomes a simple wrapper around libsparse.
img2simg was not actually making the file sparse, it was using
sparse files to create multiple files that could be pieced back
together. Replace it with a simple wrapper around libsparse.
Its functionality will be replaced by an simg2simg that can
resparse a file into smaller chunks.
Change-Id: I266f70e1c750454183ce46c71a7bb66bbb033a26
Add sparse_file_add_fd to include all or part of the contents
of an fd in the output file. Will be useful for re-sparsing files
where fd will point to the input sparse file.
Change-Id: I5d4ab07fb37231e8e9c1912f62a2968c8b0a00ef
This moves an exact copy of libsparse from
system/extras/ext4_utils/libsparse to system/core/libsparse in
preparation for linking tools in system/core against it.
Change-Id: If664e4fcfd6612844ac745589beb1517e7f9fe58
Colin Cross