diff options
Diffstat (limited to 'lib/zlib')
| -rw-r--r-- | lib/zlib/inffast.c | 20 | ||||
| -rw-r--r-- | lib/zlib/inflate.c | 22 | ||||
| -rw-r--r-- | lib/zlib/inflate.h | 2 |
3 files changed, 22 insertions, 22 deletions
diff --git a/lib/zlib/inffast.c b/lib/zlib/inffast.c index d61cf0e72af..bdaa6d0dc51 100644 --- a/lib/zlib/inffast.c +++ b/lib/zlib/inffast.c @@ -80,7 +80,7 @@ void inflate_fast(z_streamp strm, unsigned start) #endif unsigned wsize; /* window size or zero if not using window */ unsigned whave; /* valid bytes in the window */ - unsigned write; /* window write index */ + unsigned wnext; /* window write index */ unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */ unsigned long hold; /* local strm->hold */ unsigned bits; /* local strm->bits */ @@ -115,7 +115,7 @@ void inflate_fast(z_streamp strm, unsigned start) #endif wsize = state->wsize; whave = state->whave; - write = state->write; + wnext = state->wnext; window = state->window; hold = state->hold; bits = state->bits; @@ -201,7 +201,7 @@ void inflate_fast(z_streamp strm, unsigned start) break; } from = window - OFF; - if (write == 0) { /* very common case */ + if (wnext == 0) { /* very common case */ from += wsize - op; if (op < len) { /* some from window */ len -= op; @@ -211,17 +211,17 @@ void inflate_fast(z_streamp strm, unsigned start) from = out - dist; /* rest from output */ } } - else if (write < op) { /* wrap around window */ - from += wsize + write - op; - op -= write; + else if (wnext < op) { /* wrap around window */ + from += wsize + wnext - op; + op -= wnext; if (op < len) { /* some from end of window */ len -= op; do { PUP(out) = PUP(from); } while (--op); from = window - OFF; - if (write < len) { /* some from start of window */ - op = write; + if (wnext < len) { /* some from start of window */ + op = wnext; len -= op; do { PUP(out) = PUP(from); @@ -231,7 +231,7 @@ void inflate_fast(z_streamp strm, unsigned start) } } else { /* contiguous in window */ - from += write - op; + from += wnext - op; if (op < len) { /* some from window */ len -= op; do { @@ -343,7 +343,7 @@ void inflate_fast(z_streamp strm, unsigned start) inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe): - Using bit fields for code structure - Different op definition to avoid & for extra bits (do & for table bits) - - Three separate decoding do-loops for direct, window, and write == 0 + - Three separate decoding do-loops for direct, window, and wnext == 0 - Special case for distance > 1 copies to do overlapped load and store copy - Explicit branch predictions (based on measured branch probabilities) - Deferring match copy and interspersed it with decoding subsequent codes diff --git a/lib/zlib/inflate.c b/lib/zlib/inflate.c index 8f767b7b9d2..79c9e991aa3 100644 --- a/lib/zlib/inflate.c +++ b/lib/zlib/inflate.c @@ -21,7 +21,7 @@ int ZEXPORT inflateReset(z_streamp strm) state->head = Z_NULL; state->wsize = 0; state->whave = 0; - state->write = 0; + state->wnext = 0; state->hold = 0; state->bits = 0; state->lencode = state->distcode = state->next = state->codes; @@ -115,7 +115,7 @@ local int updatewindow(z_streamp strm, unsigned out) /* if window not in use yet, initialize */ if (state->wsize == 0) { state->wsize = 1U << state->wbits; - state->write = 0; + state->wnext = 0; state->whave = 0; } @@ -123,22 +123,22 @@ local int updatewindow(z_streamp strm, unsigned out) copy = out - strm->avail_out; if (copy >= state->wsize) { zmemcpy(state->window, strm->next_out - state->wsize, state->wsize); - state->write = 0; + state->wnext = 0; state->whave = state->wsize; } else { - dist = state->wsize - state->write; + dist = state->wsize - state->wnext; if (dist > copy) dist = copy; - zmemcpy(state->window + state->write, strm->next_out - copy, dist); + zmemcpy(state->window + state->wnext, strm->next_out - copy, dist); copy -= dist; if (copy) { zmemcpy(state->window, strm->next_out - copy, copy); - state->write = copy; + state->wnext = copy; state->whave = state->wsize; } else { - state->write += dist; - if (state->write == state->wsize) state->write = 0; + state->wnext += dist; + if (state->wnext == state->wsize) state->wnext = 0; if (state->whave < state->wsize) state->whave += dist; } } @@ -823,12 +823,12 @@ int ZEXPORT inflate(z_streamp strm, int flush) copy = out - left; if (state->offset > copy) { /* copy from window */ copy = state->offset - copy; - if (copy > state->write) { - copy -= state->write; + if (copy > state->wnext) { + copy -= state->wnext; from = state->window + (state->wsize - copy); } else - from = state->window + (state->write - copy); + from = state->window + (state->wnext - copy); if (copy > state->length) copy = state->length; } else { /* copy from output */ diff --git a/lib/zlib/inflate.h b/lib/zlib/inflate.h index 07bd3e78a7c..2657d611cda 100644 --- a/lib/zlib/inflate.h +++ b/lib/zlib/inflate.h @@ -88,7 +88,7 @@ struct inflate_state { unsigned wbits; /* log base 2 of requested window size */ unsigned wsize; /* window size or zero if not using window */ unsigned whave; /* valid bytes in the window */ - unsigned write; /* window write index */ + unsigned wnext; /* window write index */ unsigned char FAR *window; /* allocated sliding window, if needed */ /* bit accumulator */ unsigned long hold; /* input bit accumulator */ |