59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
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/*
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* xDMS v1.3 - Portable DMS archive unpacker - Public Domain
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* Written by Andre Rodrigues de la Rocha <adlroc@usa.net>
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*
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* Main decompression functions used in MEDIUM mode
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*
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*/
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#include <string.h>
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#include "cdata.h"
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#include "u_medium.h"
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#include "getbits.h"
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#include "tables.h"
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#define MBITMASK 0x3fff
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USHORT medium_text_loc;
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USHORT Unpack_MEDIUM(UCHAR *in, UCHAR *out, USHORT origsize){
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USHORT i, j, c;
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UCHAR u, *outend;
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initbitbuf(in);
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outend = out+origsize;
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while (out < outend) {
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if (GETBITS(1)!=0) {
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DROPBITS(1);
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*out++ = text[medium_text_loc++ & MBITMASK] = (UCHAR)GETBITS(8);
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DROPBITS(8);
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} else {
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DROPBITS(1);
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c = GETBITS(8); DROPBITS(8);
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j = (USHORT) (d_code[c]+3);
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u = d_len[c];
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c = (USHORT) (((c << u) | GETBITS(u)) & 0xff); DROPBITS(u);
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u = d_len[c];
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c = (USHORT) ((d_code[c] << 8) | (((c << u) | GETBITS(u)) & 0xff)); DROPBITS(u);
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i = (USHORT) (medium_text_loc - c - 1);
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while(j--) *out++ = text[medium_text_loc++ & MBITMASK] = text[i++ & MBITMASK];
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}
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}
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medium_text_loc = (USHORT)((medium_text_loc+66) & MBITMASK);
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return 0;
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}
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