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- /* Copyright (C) 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.
- */
-
- /* shcgen.h */
- /* Interface to shcgen.c */
- /* Requires shc.h */
-
- /* Compute an optimal Huffman code from an input data set. */
- /* The client must have set all the elements of *def. */
- /* The definition is guaranteed to be well-behaved. */
- int hc_compute(P3(hc_definition *def, const long *freqs, gs_memory_t *mem));
-
- /* Convert a definition to a byte string. */
- /* The caller must provide the byte string, of length def->num_values. */
- /* Assume (do not check) that the definition is well-behaved. */
- /* Return the actual length of the string. */
- int hc_bytes_from_definition(P2(byte *dbytes, const hc_definition *def));
-
- /* Extract num_counts and num_values from a byte string. */
- void hc_sizes_from_bytes(P3(hc_definition *def, const byte *dbytes, int num_bytes));
-
- /* Convert a byte string back to a definition. */
- /* The caller must initialize *def, including allocating counts and values. */
- void hc_definition_from_bytes(P2(hc_definition *def, const byte *dbytes));
-
- /* Generate the encoding table from the definition. */
- /* The size of the encode array is def->num_values. */
- void hc_make_encoding(P2(hce_code *encode, const hc_definition *def));
-
- /* Calculate the size of the decoding table. */
- uint hc_sizeof_decoding(P2(const hc_definition *def, int initial_bits));
-
- /* Generate the decoding tables. */
- void hc_make_decoding(P3(hcd_code *decode, const hc_definition *def,
- int initial_bits));
-