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- /* Copyright (C) 1992, 1994 Aladdin Enterprises. All rights reserved.
-
- This file is part of Aladdin Ghostscript.
-
- Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- or distributor accepts any responsibility for the consequences of using it,
- or for whether it serves any particular purpose or works at all, unless he
- or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- License (the "License") for full details.
-
- Every copy of Aladdin Ghostscript must include a copy of the License,
- normally in a plain ASCII text file named PUBLIC. The License grants you
- the right to copy, modify and redistribute Aladdin Ghostscript, but only
- under certain conditions described in the License. Among other things, the
- License requires that the copyright notice and this notice be preserved on
- all copies.
- */
-
- /* shc.c */
- /* Support code for shc.h */
- #include "std.h"
- #include "scommon.h"
- #include "shc.h"
-
- /* ------ Encoding ------ */
-
- /* Empty the 1-word buffer onto the output stream. */
- byte *
- hc_put_code_proc(register stream_hc_state *ss, byte *q, uint code)
- { int left = ss->bits_left;
- const uint cw = ss->bits + (code >> -left);
- #define cb(n) ((byte)(cw >> (n * 8)))
- #define W (hc_bits_size >> 3)
- if ( ss->FirstBitLowOrder )
- {
- #if hc_bits_size > 16
- q[1] = sbits_reverse_bits[cb(3)];
- q[2] = sbits_reverse_bits[cb(2)];
- #endif
- q[W-1] = sbits_reverse_bits[cb(1)];
- q[W] = sbits_reverse_bits[cb(0)];
- }
- else
- {
- #if hc_bits_size > 16
- q[1] = cb(3);
- q[2] = cb(2);
- #endif
- q[W-1] = cb(1);
- q[W] = cb(0);
- }
- #undef cb
- ss->bits = code << (ss->bits_left = left + hc_bits_size);
- return q + W;
- #undef W
- }
-
- /* Put out any final bytes. */
- byte *
- hc_put_last_bits(stream_hc_state *ss, byte *q)
- { while ( ss->bits_left < hc_bits_size )
- { byte c = (byte)(ss->bits >> (hc_bits_size - 8));
- if ( ss->FirstBitLowOrder )
- c = sbits_reverse_bits[c];
- *++q = c;
- ss->bits <<= 8;
- ss->bits_left += 8;
- }
- return q;
- }
-