int output_code(int code, ref StateLZW st)
{
int bits;
if (st.maxCode > 2048)
{
bits = 12;
}
else
if (st.maxCode > 1024)
{
bits = 11;
}
else
if (st.maxCode > 512)
{
bits = 10;
}
else
{
bits = 9;
}
st.buf[st.p++] |= (byte)(code << st.bs);
code >>= (8 - st.bs);
bits -= 8 - st.bs;
if (bits > 8)
{
st.buf[st.p++] = (byte)code;
bits -= 8;
code >>= 8;
}
st.buf[st.p] = (byte)code;
st.bs = bits;
return(st.p);
}
int input_code(ref StateLZW st)
{
int bits;
int maxCode = st.maxCode + 1;
if (maxCode > 2048)
{
bits = 12;
}
else
if (maxCode > 1024)
{
bits = 11;
}
else
if (maxCode > 512)
{
bits = 10;
}
else
{
bits = 9;
}
int code = st.buf[st.p++] >> st.bs;
int bs2 = (8 - st.bs);
bits -= bs2;
if (bits > 8)
{
code |= st.buf[st.p++] << bs2;
bs2 += 8;
bits -= 8;
}
code |= (st.buf[st.p] & ((1 << bits) - 1)) << bs2;
st.bs = bits;
return(code);
}