* src/sparse.c (sparse_scan_file): If the file is entirely sparse,
that is, if ST_NBLOCKS is zero, don't bother scanning for nonzero
blocks. Idea by Kit Westneat, communicated by Bernd Schubert in
<http://lists.gnu.org/archive/html/bug-tar/2010-08/msg00038.html>.
Also, omit unnecessary lseek at start of file.
version (1.0) of PAX sparse format.
(pax_sparse_member_p): Fix condition
(pax_dump_header): A dispatcher function
(pax_dump_header_0,pax_dump_header_1): New functions.
(pax_optab): Update
(oldgnu_dump_header): Minor fix: make sure
sparse_header.isextended is set before calling
set_next_block_after
in GNU.sparse.name variable. The name field in the ustar header
now contains generated name (%d/GNUSparseFile.%p/%f), so that
non-pax-aware tars won't extract the file under the original
filename.
(pax_dump_header): Store sparse map in GNU.sparse.map. If this
variable has been explicitely deleted, use GNU.sparse.offset/
GNU.sparse.numbytes variables.
* src/sparse.c: Include <inttostr.h>.
(struct tar_sparse_file): offset and dumped_size are off_t, not
size_t. optab is now const *.
(dump_zeros): Return bool success flag, not off_t.
All callers changed.
Use a constant-zero buffer rather than clearing a buffer each time.
Don't mess up if write fails.
(dump_zeros, check_sparse_region):
Don't assume off_t is no wider than size_t.
(tar_sparse_init): Don't bother clearing a field that is already clear.
(zero_block_p): First arg is const *, not *.
(clear_block, SPARSES_INIT_COUNT): Remove.
(sparse_add_map): First arg is now struct start_stat_info *, not
struct tar_sparse_file *. All callers changed.
Use x2nrealloc to check for size_t overflow.
(parse_scan_file): Cache commonly-used parts of file.
Use an auto buffer, not a static one.
Don't bother clearing the buffer; not needed.
Don't bother clearing items that are already clear.
(oldgnu_optab, star_optab, pax_optab): Now const.
(sparse_dump_region): Don't bother clearing the buffer before
reading into it; just clear the parts that aren't read into.
(sparse_dump_file): Clear the whole local variable 'file'.
(diff_buffer): Remove; now a local var.
(check_sparse_region): Don't bother clearing buffer before
reading into it. Don't assume off_t is promoted to long.
(oldgnu_get_sparse_info, star_get_sparse_info):
Use an auto status, not static.
* src/tar.h (struct tar_stat_info): had_trailing_slash is
now bool, not int.
* src/xheader.c (sparse_offset_coder, sparse_numbytes_coder):
Rewrite to avoid cast.
(sparse_offset_decoder, sparse_numbytes_decoder):
Diagnose excess entries rather than crashing.
of sparse_map_size. We assume that whatever number it contains
describes adequately the current size of sparse_map. The only
number we need to reset is sparse_map_avail.
(struct tar_sparse_optab.fixup_header): New member
(tar_sparse_member_p): New function.
(tar_sparse_init): Return true if decode_header is not provided
(tar_sparse_fixup_header)
(sparse_member_p,sparse_fixup_header)
(sparse_skip_file)
(oldgnu_sparse_member_p,oldgnu_fixup_header,star_sparse_member_p)
(star_fixup_header, pax_sparse_member_p): New function
(pax_decode_header): Remove
