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Honor deflateReset promise to reset the header.

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This corrects the code to match the documentation in zlib.h.
However, note that this may break code out there that assumed the
incorrect persistence of the header across resets.
This commit is contained in:
Mika T. Lindqvist
2026-06-09 18:23:30 +03:00
committed by Mark Adler
parent ec63cd60eb
commit 767c4c9478
1 changed files with 2 additions and 1 deletions
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deflate.c
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@@ -445,7 +445,6 @@ int ZEXPORT deflateInit2_(z_streamp strm, int level, int method,
s->status = INIT_STATE; /* to pass state test in deflateReset() */
s->wrap = wrap;
s->gzhead = Z_NULL;
s->w_bits = (uInt)windowBits;
s->w_size = 1 << s->w_bits;
s->w_mask = s->w_size - 1;
@@ -671,6 +670,8 @@ int ZEXPORT deflateResetKeep(z_streamp strm) {
adler32(0L, Z_NULL, 0);
s->last_flush = -2;
s->gzhead = Z_NULL;
_tr_init(s);
return Z_OK;