public int deflateEnd()
{
if (this.dstate == null)
{
return(-2);
}
int num = this.dstate.deflateEnd();
this.dstate = null;
return(num);
}
internal void gen_bitlen(Deflate s)
{
int num4;
short[] numArray = this.dyn_tree;
short[] numArray2 = this.stat_desc.static_tree;
int[] numArray3 = this.stat_desc.extra_bits;
int num = this.stat_desc.extra_base;
int index = this.stat_desc.max_length;
int num9 = 0;
int num6 = 0;
while (num6 <= 15)
{
s.bl_count[num6] = 0;
num6++;
}
numArray[(s.heap[s.heap_max] * 2) + 1] = 0;
int num3 = s.heap_max + 1;
while (num3 < 0x23d)
{
num4 = s.heap[num3];
num6 = numArray[(numArray[(num4 * 2) + 1] * 2) + 1] + 1;
if (num6 > index)
{
num6 = index;
num9++;
}
numArray[(num4 * 2) + 1] = (short)num6;
if (num4 <= this.max_code)
{
s.bl_count[num6]++;
int num7 = 0;
if (num4 >= num)
{
num7 = numArray3[num4 - num];
}
short num8 = numArray[num4 * 2];
s.opt_len += num8 * (num6 + num7);
if (numArray2 != null)
{
s.static_len += num8 * (numArray2[(num4 * 2) + 1] + num7);
}
}
num3++;
}
if (num9 != 0)
{
do
{
num6 = index - 1;
while (s.bl_count[num6] == 0)
{
num6--;
}
s.bl_count[num6]--;
s.bl_count[num6 + 1] += 2;
s.bl_count[index]--;
num9 -= 2;
}while (num9 > 0);
for (num6 = index; num6 != 0; num6--)
{
num4 = s.bl_count[num6];
while (num4 != 0)
{
int num5 = s.heap[--num3];
if (num5 <= this.max_code)
{
if (numArray[(num5 * 2) + 1] != num6)
{
s.opt_len += (num6 - numArray[(num5 * 2) + 1]) * numArray[num5 * 2];
numArray[(num5 * 2) + 1] = (short)num6;
}
num4--;
}
}
}
}
}
internal void build_tree(Deflate s)
{
int num2;
int num5;
short[] tree = this.dyn_tree;
short[] numArray2 = this.stat_desc.static_tree;
int elems = this.stat_desc.elems;
int num4 = -1;
s.heap_len = 0;
s.heap_max = 0x23d;
for (num2 = 0; num2 < elems; num2++)
{
if (tree[num2 * 2] != 0)
{
s.heap[++s.heap_len] = num4 = num2;
s.depth[num2] = 0;
}
else
{
tree[(num2 * 2) + 1] = 0;
}
}
while (s.heap_len < 2)
{
num5 = s.heap[++s.heap_len] = (num4 < 2) ? ++num4 : 0;
tree[num5 * 2] = 1;
s.depth[num5] = 0;
s.opt_len--;
if (numArray2 != null)
{
s.static_len -= numArray2[(num5 * 2) + 1];
}
}
this.max_code = num4;
num2 = s.heap_len / 2;
while (num2 >= 1)
{
s.pqdownheap(tree, num2);
num2--;
}
num5 = elems;
do
{
num2 = s.heap[1];
s.heap[1] = s.heap[s.heap_len--];
s.pqdownheap(tree, 1);
int index = s.heap[1];
s.heap[--s.heap_max] = num2;
s.heap[--s.heap_max] = index;
tree[num5 * 2] = (short)(tree[num2 * 2] + tree[index * 2]);
s.depth[num5] = (byte)(Math.Max(s.depth[num2], s.depth[index]) + 1);
tree[(num2 * 2) + 1] = tree[(index * 2) + 1] = (short)num5;
s.heap[1] = num5++;
s.pqdownheap(tree, 1);
}while (s.heap_len >= 2);
s.heap[--s.heap_max] = s.heap[1];
this.gen_bitlen(s);
gen_codes(tree, num4, s.bl_count);
}
public int deflateInit(int level, int bits, bool nowrap)
{
this.dstate = new Deflate();
return(this.dstate.deflateInit(this, level, nowrap ? -bits : bits));
}
