libkern/zlib/inflate.c

38  *   creation of window when not needed, minimize use of window when it is
59  * - Fix bug in reuse of allocated window after inflateReset()
72  * - Rearrange window copies in inflate_fast() for speed and simplification
73  * - Unroll last copy for window match in inflate_fast()
74  * - Use local copies of window variables in inflate_fast() for speed
81  *   programs like gzip and unzip -- uses window as output buffer to avoid
82  *   window copying
94  * - Changed type of window in inflateBackInit() to unsigned char *
212     state->window = Z_NULL;
339    Update the window with the last wsize (normally 32K) bytes written before
340    returning.  If window does not exist yet, create it.  This is only called
341    when a window is already in use, or when output has been written during this
343    It is also called to create a window for dictionary data when a dictionary
347    advantage, since only the last 32K of output is copied to the sliding window
361     /* if it hasn't been done already, allocate space for the window */
362     if (state->window == Z_NULL) {
363         state->window = (unsigned char FAR *)
366         if (state->window == Z_NULL) return 1;
369     /* if window not in use yet, initialize */
376     /* copy state->wsize or less output bytes into the circular window */
379         zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
386         zmemcpy(state->window + state->write, strm->next_out - copy, dist);
389             zmemcpy(state->window, strm->next_out - copy, copy);
567    When there is a window, goto inf_leave will update the window with the last
569    and there is no window currently, goto inf_leave will create one and copy
570    output to the window for the next call of inflate().
576    the allocation of and copying into a sliding window until necessary, which
652                 strm->msg = (char *)"invalid window size";
1078             if (state->offset > copy) {         /* copy from window */
1082                     from = state->window + (state->wsize - copy);
1085                     from = state->window + (state->write - copy);
1159        error.  Call updatewindow() to create and/or update the window state.
1191     if (state->window != Z_NULL) ZFREE(strm, state->window);
1220     /* copy dictionary to window */
1226         zmemcpy(state->window, dictionary + dictLength - state->wsize,
1231         zmemcpy(state->window + state->wsize - dictLength, dictionary,
1358     unsigned char FAR *window;
1371     window = Z_NULL;
1372     if (state->window != Z_NULL) {
1373         window = (unsigned char FAR *)
1375         if (window == Z_NULL) {
1390     if (window != Z_NULL) {
1392         zmemcpy(window, state->window, wsize);
1394     copy->window = window;