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Merged changes from zlib 1.1.4.

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This commit is contained in:
Werner Koch 2002-03-12 09:34:29 +00:00
parent f8f52d8ffe
commit 6c1f79a654
24 changed files with 85 additions and 62 deletions
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47
zlib/inffast.c
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@ -1,5 +1,5 @@
/* inffast.c -- process literals and length/distance pairs fast
* Copyright (C) 1995-1998 Mark Adler
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@ -93,28 +93,41 @@ z_streamp z;
/* do the copy */
m -= c;
if ((uInt)(q - s->window) >= d) /* offset before dest */
{ /* just copy */
r = q - d;
*q++ = *r++; c--; /* minimum count is three, */
*q++ = *r++; c--; /* so unroll loop a little */
}
else /* else offset after destination */
r = q - d;
if (r < s->window) /* wrap if needed */
{
e = d - (uInt)(q - s->window); /* bytes from offset to end */
r = s->end - e; /* pointer to offset */
if (c > e) /* if source crosses, */
do {
r += s->end - s->window; /* force pointer in window */
} while (r < s->window); /* covers invalid distances */
e = s->end - r;
if (c > e)
{
c -= e; /* copy to end of window */
c -= e; /* wrapped copy */
do {
*q++ = *r++;
*q++ = *r++;
} while (--e);
r = s->window; /* copy rest from start of window */
r = s->window;
do {
*q++ = *r++;
} while (--c);
}
else /* normal copy */
{
*q++ = *r++; c--;
*q++ = *r++; c--;
do {
*q++ = *r++;
} while (--c);
}
}
do { /* copy all or what's left */
*q++ = *r++;
} while (--c);
else /* normal copy */
{
*q++ = *r++; c--;
*q++ = *r++; c--;
do {
*q++ = *r++;
} while (--c);
}
break;
}
else if ((e & 64) == 0)