int inflateInit(int w) {
z.msg = null;
blocks = null;
// handle undocumented wrap option (no zlib header or check)
wrap = 0;
if (w < 0) {
w = -w;
} else {
wrap = (w >> 4) + 1;
if (w < 48) w &= 15;
}
if (w < 8 || w > 15) {
inflateEnd();
return Z_STREAM_ERROR;
}
if (blocks != null && wbits != w) {
blocks.free();
blocks = null;
}
// set window size
wbits = w;
this.blocks = new InfBlocks(z, 1 << w);
// reset state
inflateReset();
return Z_OK;
}
int inflate_fast(
int bl, int bd, int[] tl, int tl_index, int[] td, int td_index, InfBlocks s, ZStream z) {
int t; // temporary pointer
int[] tp; // temporary pointer
int tp_index; // temporary pointer
int e; // extra bits or operation
int b; // bit buffer
int k; // bits in bit buffer
int p; // input data pointer
int n; // bytes available there
int q; // output window write pointer
int m; // bytes to end of window or read pointer
int ml; // mask for literal/length tree
int md; // mask for distance tree
int c; // bytes to copy
int d; // distance back to copy from
int r; // copy source pointer
int tp_index_t_3; // (tp_index+t)*3
// load input, output, bit values
p = z.next_in_index;
n = z.avail_in;
b = s.bitb;
k = s.bitk;
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
// initialize masks
ml = inflate_mask[bl];
md = inflate_mask[bd];
// do until not enough input or output space for fast loop
do { // assume called with m >= 258 && n >= 10
// get literal/length code
while (k < (20)) { // max bits for literal/length code
n--;
b |= (z.next_in[p++] & 0xff) << k;
k += 8;
}
t = b & ml;
tp = tl;
tp_index = tl_index;
tp_index_t_3 = (tp_index + t) * 3;
if ((e = tp[tp_index_t_3]) == 0) {
b >>= (tp[tp_index_t_3 + 1]);
k -= (tp[tp_index_t_3 + 1]);
s.window[q++] = (byte) tp[tp_index_t_3 + 2];
m--;
continue;
}
do {
b >>= (tp[tp_index_t_3 + 1]);
k -= (tp[tp_index_t_3 + 1]);
if ((e & 16) != 0) {
e &= 15;
c = tp[tp_index_t_3 + 2] + ((int) b & inflate_mask[e]);
b >>= e;
k -= e;
// decode distance base of block to copy
while (k < (15)) { // max bits for distance code
n--;
b |= (z.next_in[p++] & 0xff) << k;
k += 8;
}
t = b & md;
tp = td;
tp_index = td_index;
tp_index_t_3 = (tp_index + t) * 3;
e = tp[tp_index_t_3];
do {
b >>= (tp[tp_index_t_3 + 1]);
k -= (tp[tp_index_t_3 + 1]);
if ((e & 16) != 0) {
// get extra bits to add to distance base
e &= 15;
while (k < (e)) { // get extra bits (up to 13)
n--;
b |= (z.next_in[p++] & 0xff) << k;
k += 8;
}
d = tp[tp_index_t_3 + 2] + (b & inflate_mask[e]);
b >>= (e);
k -= (e);
// do the copy
m -= c;
if (q >= d) { // offset before dest
// just copy
r = q - d;
if (q - r > 0 && 2 > (q - r)) {
s.window[q++] = s.window[r++]; // minimum count is three,
s.window[q++] = s.window[r++]; // so unroll loop a little
c -= 2;
} else {
System.arraycopy(s.window, r, s.window, q, 2);
q += 2;
r += 2;
c -= 2;
}
} else { // else offset after destination
r = q - d;
do {
r += s.end; // force pointer in window
} while (r < 0); // covers invalid distances
e = s.end - r;
if (c > e) { // if source crosses,
c -= e; // wrapped copy
if (q - r > 0 && e > (q - r)) {
do {
s.window[q++] = s.window[r++];
} while (--e != 0);
} else {
System.arraycopy(s.window, r, s.window, q, e);
q += e;
r += e;
e = 0;
}
r = 0; // copy rest from start of window
}
}
// copy all or what's left
if (q - r > 0 && c > (q - r)) {
do {
s.window[q++] = s.window[r++];
} while (--c != 0);
} else {
System.arraycopy(s.window, r, s.window, q, c);
q += c;
r += c;
c = 0;
}
break;
} else if ((e & 64) == 0) {
t += tp[tp_index_t_3 + 2];
t += (b & inflate_mask[e]);
tp_index_t_3 = (tp_index + t) * 3;
e = tp[tp_index_t_3];
} else {
z.msg = "invalid distance code";
c = z.avail_in - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= c << 3;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return Z_DATA_ERROR;
}
} while (true);
break;
}
if ((e & 64) == 0) {
t += tp[tp_index_t_3 + 2];
t += (b & inflate_mask[e]);
tp_index_t_3 = (tp_index + t) * 3;
if ((e = tp[tp_index_t_3]) == 0) {
b >>= (tp[tp_index_t_3 + 1]);
k -= (tp[tp_index_t_3 + 1]);
s.window[q++] = (byte) tp[tp_index_t_3 + 2];
m--;
break;
}
} else if ((e & 32) != 0) {
c = z.avail_in - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= c << 3;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return Z_STREAM_END;
} else {
z.msg = "invalid literal/length code";
c = z.avail_in - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= c << 3;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return Z_DATA_ERROR;
}
} while (true);
} while (m >= 258 && n >= 10);
// not enough input or output--restore pointers and return
c = z.avail_in - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= c << 3;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return Z_OK;
}
int proc(InfBlocks s, ZStream z, int r) {
int j; // temporary storage
@SuppressWarnings("unused")
int[] t; // temporary pointer
int tindex; // temporary pointer
int e; // extra bits or operation
int b = 0; // bit buffer
int k = 0; // bits in bit buffer
int p = 0; // input data pointer
int n; // bytes available there
int q; // output window write pointer
int m; // bytes to end of window or read pointer
int f; // pointer to copy strings from
// copy input/output information to locals (UPDATE macro restores)
p = z.next_in_index;
n = z.avail_in;
b = s.bitb;
k = s.bitk;
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
// process input and output based on current state
while (true) {
switch (mode) {
// waiting for "i:"=input, "o:"=output, "x:"=nothing
case START: // x: set up for LEN
if (m >= 258 && n >= 10) {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
r = inflate_fast(lbits, dbits, ltree, ltree_index, dtree, dtree_index, s, z);
p = z.next_in_index;
n = z.avail_in;
b = s.bitb;
k = s.bitk;
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
if (r != Z_OK) {
mode = r == Z_STREAM_END ? WASH : BADCODE;
break;
}
}
need = lbits;
tree = ltree;
tree_index = ltree_index;
mode = LEN;
case LEN: // i: get length/literal/eob next
j = need;
while (k < (j)) {
if (n != 0) r = Z_OK;
else {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
n--;
b |= (z.next_in[p++] & 0xff) << k;
k += 8;
}
tindex = (tree_index + (b & inflate_mask[j])) * 3;
b >>>= (tree[tindex + 1]);
k -= (tree[tindex + 1]);
e = tree[tindex];
if (e == 0) { // literal
lit = tree[tindex + 2];
mode = LIT;
break;
}
if ((e & 16) != 0) { // length
get = e & 15;
len = tree[tindex + 2];
mode = LENEXT;
break;
}
if ((e & 64) == 0) { // next table
need = e;
tree_index = tindex / 3 + tree[tindex + 2];
break;
}
if ((e & 32) != 0) { // end of block
mode = WASH;
break;
}
mode = BADCODE; // invalid code
z.msg = "invalid literal/length code";
r = Z_DATA_ERROR;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
case LENEXT: // i: getting length extra (have base)
j = get;
while (k < (j)) {
if (n != 0) r = Z_OK;
else {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
n--;
b |= (z.next_in[p++] & 0xff) << k;
k += 8;
}
len += (b & inflate_mask[j]);
b >>= j;
k -= j;
need = dbits;
tree = dtree;
tree_index = dtree_index;
mode = DIST;
case DIST: // i: get distance next
j = need;
while (k < (j)) {
if (n != 0) r = Z_OK;
else {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
n--;
b |= (z.next_in[p++] & 0xff) << k;
k += 8;
}
tindex = (tree_index + (b & inflate_mask[j])) * 3;
b >>= tree[tindex + 1];
k -= tree[tindex + 1];
e = (tree[tindex]);
if ((e & 16) != 0) { // distance
get = e & 15;
dist = tree[tindex + 2];
mode = DISTEXT;
break;
}
if ((e & 64) == 0) { // next table
need = e;
tree_index = tindex / 3 + tree[tindex + 2];
break;
}
mode = BADCODE; // invalid code
z.msg = "invalid distance code";
r = Z_DATA_ERROR;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
case DISTEXT: // i: getting distance extra
j = get;
while (k < (j)) {
if (n != 0) r = Z_OK;
else {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
n--;
b |= (z.next_in[p++] & 0xff) << k;
k += 8;
}
dist += (b & inflate_mask[j]);
b >>= j;
k -= j;
mode = COPY;
case COPY: // o: copying bytes in window, waiting for space
f = q - dist;
while (f < 0) { // modulo window size-"while" instead
f += s.end; // of "if" handles invalid distances
}
while (len != 0) {
if (m == 0) {
if (q == s.end && s.read != 0) {
q = 0;
m = q < s.read ? s.read - q - 1 : s.end - q;
}
if (m == 0) {
s.write = q;
r = s.inflate_flush(z, r);
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
if (q == s.end && s.read != 0) {
q = 0;
m = q < s.read ? s.read - q - 1 : s.end - q;
}
if (m == 0) {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
}
}
s.window[q++] = s.window[f++];
m--;
if (f == s.end) f = 0;
len--;
}
mode = START;
break;
case LIT: // o: got literal, waiting for output space
if (m == 0) {
if (q == s.end && s.read != 0) {
q = 0;
m = q < s.read ? s.read - q - 1 : s.end - q;
}
if (m == 0) {
s.write = q;
r = s.inflate_flush(z, r);
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
if (q == s.end && s.read != 0) {
q = 0;
m = q < s.read ? s.read - q - 1 : s.end - q;
}
if (m == 0) {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
}
}
r = Z_OK;
s.window[q++] = (byte) lit;
m--;
mode = START;
break;
case WASH: // o: got eob, possibly more output
if (k > 7) { // return unused byte, if any
k -= 8;
n++;
p--; // can always return one
}
s.write = q;
r = s.inflate_flush(z, r);
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
if (s.read != s.write) {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
mode = END;
case END:
r = Z_STREAM_END;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
case BADCODE: // x: got error
r = Z_DATA_ERROR;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
default:
r = Z_STREAM_ERROR;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
}
}
int inflateEnd() {
if (blocks != null) {
blocks.free();
}
return Z_OK;
}
int inflateEnd(ZStream z) {
if (blocks != null) blocks.free(z);
blocks = null;
// ZFREE(z, z->state);
return Z_OK;
}
