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Permit Z_NULL arguments to deflatePending.

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This avoids having to create useless variables for return values
that aren't needed.
This commit is contained in:
Mark Adler 2011-12-29 00:15:44 -08:00
parent 9d55abc969
commit 19761b8506
2 changed files with 6 additions and 3 deletions
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6
deflate.c
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@ -451,8 +451,10 @@ int ZEXPORT deflatePending (strm, pending, bits)
z_streamp strm; z_streamp strm;
{ {
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
*pending = strm->state->pending; if (pending != Z_NULL)
*bits = strm->state->bi_valid; *pending = strm->state->pending;
if (bits != Z_NULL)
*bits = strm->state->bi_valid;
return Z_OK; return Z_OK;
} }

3
zlib.h
View File

@ -715,7 +715,8 @@ ZEXTERN int ZEXPORT deflatePending OF((z_streamp strm,
been generated, but not yet provided in the available output. The bytes not been generated, but not yet provided in the available output. The bytes not
provided would be due to the available output space having being consumed. provided would be due to the available output space having being consumed.
The number of bits of output not provided are between 0 and 7, where they The number of bits of output not provided are between 0 and 7, where they
await more bits to join them in order to fill out a full byte. await more bits to join them in order to fill out a full byte. If pending
or bits are Z_NULL, then those values are not set.
deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent. stream state was inconsistent.