Chiebot-Mirror/zlib - zlib - Gitea: Git with a cup of tea

Commit Graph

Author	SHA1	Message	Date
Mark Adler	5c44459c3b	Fix a bug that can crash deflate on some input when using Z_FIXED. This bug was reported by Danilo Ramos of Eideticom, Inc. It has lain in wait 13 years before being found! The bug was introduced in zlib 1.2.2.2, with the addition of the Z_FIXED option. That option forces the use of fixed Huffman codes. For rare inputs with a large number of distant matches, the pending buffer into which the compressed data is written can overwrite the distance symbol table which it overlays. That results in corrupted output due to invalid distances, and can result in out-of-bound accesses, crashing the application. The fix here combines the distance buffer and literal/length buffers into a single symbol buffer. Now three bytes of pending buffer space are opened up for each literal or length/distance pair consumed, instead of the previous two bytes. This assures that the pending buffer cannot overwrite the symbol table, since the maximum fixed code compressed length/distance is 31 bits, and since there are four bytes of pending space for every three bytes of symbol space.	7 years ago
Mark Adler	a577351394	Make the names in functions declarations identical to definitions.	7 years ago
Mark Adler	723e928b84	Avoid an undefined behavior of memcpy() in _tr_stored_block(). Allegedly the behavior of memcpy() is undefined if the source pointer is NULL, even if the number of bytes to copy is zero.	7 years ago
Mark Adler	37ed2112a1	Update vestigial comment from very old Info-ZIP deflate.	8 years ago
Mark Adler	2fa463bacf	zlib 1.2.9	8 years ago
Mark Adler	8f147c3d12	Avoid some random compiler warnings on various platforms.	8 years ago
Mark Adler	21c66cd5ac	Increase verbosity required to warn about bit length overflow. When debugging the Huffman coding would warn about resulting codes greater than 15 bits in length. This is handled properly, and is not uncommon. This increases the verbosity of the warning by one, so that it is not displayed by default.	8 years ago
Mark Adler	a456d898bb	Use memcpy for stored blocks. This speeds up level 0 by about a factor of three, as compared to the previous byte-at-a-time loop. We can do much better though. A later commit avoids this copy for level 0 with large buffers, instead copying directly from the input to the output. This commit still speeds up storing incompressible data found when compressing normally.	8 years ago
Mark Adler	7096424f23	Clean up type conversions.	8 years ago
Mark Adler	82e9dc6093	Use const for static tree descriptions in deflate. This is in order to permit shared memory for these structures.	10 years ago
Mark Adler	51a223def4	Avoid use of DEBUG macro -- change to ZLIB_DEBUG.	10 years ago
Mark Adler	62d6112a79	Clean up the usage of z_const and respect const usage within zlib. This patch allows zlib to compile cleanly with the -Wcast-qual gcc warning enabled, but only if ZLIB_CONST is defined, which adds const to next_in and msg in z_stream and in the in_func prototype. A --const option is added to ./configure which adds -DZLIB_CONST to the compile flags, and adds -Wcast-qual to the compile flags when ZLIBGCCWARN is set in the environment.	13 years ago
Mark Adler	0b828b4aa6	Write out all of the available bits when using Z_BLOCK. Previously, the bit buffer would hold 1 to 16 bits after "all" of the output is provided after a Z_BLOCK deflate() call. Now at most seven bits remain in the output buffer after Z_BLOCK. flush_pending() now flushes the bit buffer before copying out the byte buffer, in order for it to really flush as much as possible.	13 years ago
Mark Adler	8f5eceefe8	Remove second empty static block for Z_PARTIAL_FLUSH. Z_PARTIAL_FLUSH would sometimes emit two empty static blocks instead of one in order to provide enough lookahead for inflate to be able to decode what was last compressed. inflate no longer needs that much lookahead, so this removes the possibility of emitting the second empty static block. Z_PARTIAL_FLUSH will now emit only one empty static block.	13 years ago
Mark Adler	263b1a05b0	Allow deflatePrime() to insert bits in the middle of a stream. This allows the insertion of multiple empty static blocks for the purpose of efficiently bringing a stream to a byte boundary.	13 years ago
Mark Adler	9712272c78	zlib 1.2.5	14 years ago
Mark Adler	7301420248	zlib 1.2.4.5	14 years ago
Mark Adler	67cc20d004	zlib 1.2.4-pre1	14 years ago
Mark Adler	f6194ef39a	zlib 1.2.3.4	14 years ago
Mark Adler	b1c19ca6d8	zlib 1.2.3.1	14 years ago
Mark Adler	9c3a583021	zlib 1.2.2.4	14 years ago
Mark Adler	0484693e17	zlib 1.2.2.2	14 years ago
Mark Adler	9811b53dd9	zlib 1.2.2.1	14 years ago
Mark Adler	7a6955760b	zlib 1.2.1.2	14 years ago
Mark Adler	b97ec631c6	zlib 1.2.0.7	14 years ago
Mark Adler	13a294f044	zlib 1.2.0.1	14 years ago
Mark Adler	7c2a874e50	zlib 1.2.0	14 years ago
Mark Adler	a383133c4e	zlib 1.1.4	14 years ago
Mark Adler	14763ac7c6	zlib 1.1.3	14 years ago
Mark Adler	02b6cf579f	zlib 1.1.1	14 years ago
Mark Adler	965fe72aed	zlib 1.1.0	14 years ago
Mark Adler	6759211ad8	zlib 1.0.8	14 years ago
Mark Adler	7850e4e406	zlib 1.0.7	14 years ago
Mark Adler	ff11b0a61f	zlib 1.0.4	14 years ago
Mark Adler	e26a448e96	zlib 1.0.2	14 years ago
Mark Adler	423eb40306	zlib 1.0.1	14 years ago
Mark Adler	8a2acbffc8	zlib 1.0-pre	14 years ago
Mark Adler	56bcb184fa	zlib 0.99	14 years ago
Mark Adler	25e5325501	zlib 0.95	14 years ago
Mark Adler	23c69f1069	zlib 0.94	14 years ago
Mark Adler	6b834a58bd	zlib 0.93	14 years ago
Mark Adler	bdde4e09d2	zlib 0.92	14 years ago
Mark Adler	64b2e89203	zlib 0.9	14 years ago
Mark Adler	4ca984fb44	zlib 0.8	14 years ago
Mark Adler	913afb9174	zlib 0.79	14 years ago
Mark Adler	bcf78a2097	zlib 0.71	14 years ago

46 Commits (88baa583b93db6e7d88b0f0d6a0b7da8edaeaa62)