diff options
Diffstat (limited to 'lib/zlib/inffast.c')
| -rw-r--r-- | lib/zlib/inffast.c | 20 |
1 files changed, 10 insertions, 10 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 |