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- /*--------------------------------------------------------------------------*/
- /* */
- /* Copyright 1989, Doug Boone. FidoNet 119/5 */
- /* (916) 893-9019 Data */
- /* (916) 891-0748 voice */
- /* P.O. Box 5108, Chico, CA. 95928 */
- /* */
- /* This program is not for sale. It is for the free use with Opus systems. */
- /* You may not sell it in ANY way. If you have an access charge to your */
- /* Bulletin Board, consider this to be like Opus, you can ONLY make it */
- /* available for download in an open area, where non-members can get access */
- /* */
- /* If you need to modify this source code, please send me a copy of the */
- /* changes you've made so that everyone can share in the updates. */
- /* */
- /* "Don't rip me off!" -- Tom Jennings, FidoNet's founder */
- /* */
- /*--------------------------------------------------------------------------*/
-
-
- #define STRSIZ 256
- #define INBUF_SIZE 8192
- #define OUTBUF_SIZE 32768
- #define DLE 144
- #define MAX_BITS 13
- #define INIT_BITS 9
- #define HSIZE 8192
- #define FIRST 257
- #define CLEAR 256
-
-
- extern FILE *Log_fp;
- extern int infile;
- extern int outfile;
- extern byte *inbuf;
- extern byte *inptr;
- extern byte *outbuf;
- extern byte *outptr;
- extern unsigned inpos;
- extern unsigned outpos;
- extern long packed;
- extern long unpacked;
- extern unsigned insize;
- extern unsigned outsize;
-
- long outcnt;
- int method; /* Packing method */
- unsigned bitbuf;
- int bits_left;
- char zipeof; /* used as an error flag */
-
- byte followers[CLEAR][64];
- byte Slen[CLEAR];
-
-
- int prefix[HSIZE +1];
- byte suffix[HSIZE +1];
- byte stack[HSIZE +1];
-
- int codesize;
- int maxcode;
- int free_ent;
- int maxcodemax;
- int offset;
-
- static unsigned mask_bits[] =
- {0, 0x0001, 0x0003, 0x0007, 0x000f,
- 0x001f, 0x003f, 0x007f, 0x00ff,
- 0x01ff, 0x03ff, 0x07ff, 0x0fff,
- 0x1fff, 0x3fff, 0x7fff, 0xffff
- };
-
- int L_table[] = {0, 0x7f, 0x3f, 0x1f, 0x0f};
- int D_shift[] = {0, 0x07, 0x06, 0x05, 0x04};
- int D_mask[] = {0, 0x01, 0x03, 0x07, 0x0f};
-
- int B_table[] = { 8, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8};
-
-
-