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242 Commits

Author SHA1 Message Date
Ryan Liptak
08f0780cb2 zstd.Decompress.stream: Fix handling of skippable frames in new_frame state 
The previous code assumed that `initFrame` during the `new_frame` state would always result in the `in_frame` state, but that's not always the case. `initFrame` can also result in the `skippable_frame` state, which would lead to access of union field 'in_frame' while field 'skipping_frame' is active.

Now, the switch is re-entered with the updated state so either case is handled appropriately.

Fixes the crashes from https://github.com/ziglang/zig/issues/24817
 2025-08-14 17:37:51 -07:00
Andrew Kelley
e252e6c696
Merge pull request #24847 from squeek502/zstd-partial-magic 
zstd.Decompress: Treat a partial magic number as a failure
 2025-08-14 16:08:06 -07:00
Ryan Liptak
353cf1f671 zstd.Decompress: Delete unused/impossible "end" state 2025-08-14 14:08:49 -07:00
Ryan Liptak
60b0b21296 zstd.Decompress: Treat a partial magic number as a failure 
Previously, the "allow EndOfStream" part of this logic was too permissive. If there are a few dangling bytes at the end of the stream, that should be treated as a bad magic number. The only case where EndOfStream is allowed is when the stream is truly at the end, with exactly zero bytes available.
 2025-08-14 14:08:49 -07:00
Andrew Kelley
af7e142485 std.Io.Writer: introduce rebase to the vtable 
fixes #24814
 2025-08-14 12:56:37 -07:00
Isaac Freund
b8124d9c0b std.io.Writer.Allocating: rename getWritten() to written() 
This "get" is useless noise and was copied from FixedBufferWriter.
Since this API has not yet landed in a release, now is a good time
to make the breaking change to fix this.
 2025-08-13 01:43:52 -07:00
Andrew Kelley
749f10af49 std.ArrayList: make unmanaged the default 2025-08-11 15:52:49 -07:00
Andrew Kelley
df46ee61c4 std.Io.Writer.Allocating: configurable bump amount 2025-08-08 19:22:08 -07:00
Andrew Kelley
91a81d3846 std.compress.flate.Decompress: fix buffer size in test 2025-08-08 15:03:05 -07:00
Ryan Liptak
23fff3442d flate: Handle invalid block type 
Fixes `panic: invalid enum value` when the type bits had the u2 value of 3.

Contributes towards #24741
 2025-08-08 12:27:25 -07:00
Igor Anić
6de2310035
flate change bit reader Bits to usize (#24719) 
Don't see why byte returned from specialPeek needs to be shifted by
remaining_needed_bits.
I believe that decision in specialPeek should be done on the number of
the remaining bits not of the content of that bits.

Some test result are changed, but they are now consistent with the
original state as found in:
5f790464b0/lib/std/compress/flate/Decompress.zig

Changing Bits from usize to u32 or u64 now returns same results.

* flate: simplify peekBitsEnding

`peekBits` returns at most asked number of bits. Fails with EndOfStream
when there are no available bits. If there are less bits available than
asked still returns that available bits.
Hopefully this change better reflects intention. On first input stream
peek error we break the loop.
 2025-08-07 14:40:08 -07:00
Igor Anić
d2149106a6 flate zlib fix end of block reading 
`n` is wanted number of bits to toss
`buffered_n` is actual number of bytes in `next_int`
 2025-08-05 17:09:41 -07:00
Ian Johnson
96be6f6566 std.compress.flate.Decompress: return correct size for unbuffered decompression 
Closes #24686

As a bonus, this commit also makes the `git.zig` "testing `main`" compile again.
 2025-08-04 19:32:14 -07:00
Andrew Kelley
a6f7927764 std.compress.flate.Decompress: use 64 buffered bits 
will have to find out why usize doesn't work for 32 bit targets some
other time
 2025-08-01 09:04:27 -07:00
Andrew Kelley
64814dc986 std.compress.flate.Decompress: respect stream limit 2025-07-31 22:10:11 -07:00
Andrew Kelley
a7808892f7 std.compress.flate.Decompress: be in indirect or direct mode 
depending on whether buffered
 2025-07-31 22:10:11 -07:00
Andrew Kelley
6eac56caf7 std.compress.flate.Decompress: allow users to swap out Writer 2025-07-31 22:10:11 -07:00
Andrew Kelley
c9ff068391 std.compress: fix discard impl and flate error detection 2025-07-31 22:10:11 -07:00
Andrew Kelley
111305678c std: match readVec fn prototype exactly 
this is not necessary according to zig language, but works around a flaw
in the C backend
 2025-07-31 22:10:11 -07:00
Andrew Kelley
4c04835a08 std.compress.zstd.Decompress: implement discard and readVec 2025-07-31 22:10:11 -07:00
Andrew Kelley
84e4343b0c fix test failures by adding readVec 2025-07-31 22:10:11 -07:00
Andrew Kelley
afe9f3a9ec std.compress.flate.Decompress: implement readVec and discard 2025-07-31 22:10:11 -07:00
Andrew Kelley
6bcced31a0 fix 32-bit compilation 2025-07-31 22:10:11 -07:00
Andrew Kelley
42b10f08cc std.compress.flate.Decompress: delete bad unit tests 
if I remove the last input byte from "don't read past deflate stream's
end" (on master branch), the test fails with error.EndOfStream. what,
then, is it supposed to be testing?
 2025-07-31 22:10:11 -07:00
Andrew Kelley
5f790464b0 std.compress.flate.Decompress: hashing is out of scope 
This API provides the data; applications can verify their own checksums.
 2025-07-31 22:10:11 -07:00
Andrew Kelley
4741a16d9a putting stuff back does not require mutation 2025-07-31 22:10:11 -07:00
Andrew Kelley
05ce1f99a6 compiler: update to new flate API 2025-07-31 22:10:11 -07:00
Andrew Kelley
2569f4ff85 simplify tossBitsEnding 2025-07-31 22:10:11 -07:00
Andrew Kelley
5bc63794cc fix takeBitsEnding 2025-07-31 22:10:11 -07:00
Andrew Kelley
63f496c4f9 make takeBits deal with integers only 2025-07-31 22:10:11 -07:00
Andrew Kelley
c00fb86db6 fix peekBitsEnding 2025-07-31 22:10:11 -07:00
Andrew Kelley
8ab91a6fe9 error.EndOfStream disambiguation 2025-07-31 22:10:11 -07:00
Andrew Kelley
f644f40702 implement tossBitsEnding 2025-07-31 22:10:11 -07:00
Andrew Kelley
2d8d0dd9b0 std.compress.flate.Decompress: unfuck the test suite 2025-07-31 22:10:11 -07:00
Andrew Kelley
c684b21b4f simplify test cases 2025-07-31 22:10:11 -07:00
Andrew Kelley
ac4fbb427b std.compress.flate.Decompress: don't compute checksums 
These have no business being in-bound; simply provide the expected
values to user code for maximum flexibility.
 2025-07-31 22:10:11 -07:00
Andrew Kelley
5f571f53d6 refactor gzip test cases 
zig newbies love using for loops in unit tests
 2025-07-31 22:10:11 -07:00
Andrew Kelley
e73ca2444e std.compress.flate.Decompress: implement peekBitsEnding and writeMatch 2025-07-31 22:10:11 -07:00
Andrew Kelley
7bf91d705c fix bit read not at eof 2025-07-31 22:10:11 -07:00
Andrew Kelley
73e5594c78 std.compress.flate.Decompress: fix bit read at eof 2025-07-31 22:10:11 -07:00
Andrew Kelley
9c8cb777d4 std.compress.flate.Decompress: implement more bit reading 2025-07-31 22:10:11 -07:00
Andrew Kelley
6509fa1cf3 std.compress.flate.Decompress: passing basic test case 2025-07-31 22:10:11 -07:00
Andrew Kelley
88ca750209 std.compress.flate.Decompress: add rebase impl 2025-07-31 22:10:11 -07:00
Andrew Kelley
1b43551190 std.Io: remove BitWriter 2025-07-31 22:10:11 -07:00
Andrew Kelley
824c157e0c std.compress.flate: finish reorganizing 2025-07-31 22:10:11 -07:00
Andrew Kelley
a4f05a4588 delete flate implementation 2025-07-31 22:10:11 -07:00
Andrew Kelley
83513ade35 std.compress: rework flate to new I/O API 2025-07-31 22:10:11 -07:00
Andrew Kelley
cf7a28febb std.Io.Reader: introduce readVec back into the VTable 
simplifies and fixes things

addresses a subset of #24608
 2025-07-30 09:26:34 -07:00
Andrew Kelley
1fcaf90dd3 std.Io.Reader: make fillUnbuffered respect prexisting buffer 
addresses only one usage pattern in #24608
 2025-07-29 23:10:50 -07:00
Andrew Kelley
bb29846732 std.compress.xz: eliminate dependency on std.Io.bitReader 2025-07-27 22:08:52 -07:00