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- #include "../exehead/config.h"
- #ifdef NSIS_COMPRESS_USE_ZLIB
-
- #include "zutil.h"
-
-
- /* defines for inflate input/output */
- /* update pointers and return */
- #define UPDBITS {s->bitb=b;s->bitk=k;}
- #define UPDIN {z->avail_in=n;z->next_in=p;}
- #define UPDOUT {s->write=q;}
- #define UPDATE {UPDBITS UPDIN UPDOUT}
- #define LEAVE(r) {UPDATE inflate_flush(z); return r;}
-
- /* get bytes and bits */
- #define LOADIN {p=z->next_in;n=z->avail_in;b=s->bitb;k=s->bitk;}
-
-
- #define NEEDBYTE {if(!n)LEAVE(Z_OK)}
- #define NEXTBYTE (n--,*p++)
- #define NEEDBITS(j) {while(k<(j)){NEEDBYTE;b|=((uLong)NEXTBYTE)<<k;k+=8;}}
-
- #define DUMPBITS(j) {b>>=(j);k-=(j);}
- /* output bytes */
- #define WAVAIL (uInt)(q<s->read?s->read-q-1:s->end-q)
- #define LOADOUT {q=s->write;m=(uInt)WAVAIL;}
- #define WRAP {if(q==s->end&&s->read!=s->window){q=s->window;m=(uInt)WAVAIL;}}
- #define FLUSH {UPDOUT inflate_flush(z); LOADOUT}
- #define NEEDOUT {if(m==0){WRAP if(m==0){FLUSH WRAP if(m==0) LEAVE(Z_OK)}}}
- #define OUTBYTE(a) {*q++=(Byte)(a);m--;}
- /* load local pointers */
- #define LOAD {LOADIN LOADOUT}
-
- #define LAST (s->last == DRY)
-
- #define FIXEDH 544 /* number of hufts used by fixed tables */
-
-
-
- typedef struct inflate_blocks_state FAR inflate_blocks_statef;
- #define exop word.what.Exop
- #define bits word.what.Bits
-
- /* And'ing with mask[n] masks the lower n bits */
- local unsigned short inflate_mask[17] = {
- 0x0000,
- 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
- 0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
- };
- local const char border[] = { /* Order of the bit length code lengths */
- 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-
- /* Tables for deflate from PKZIP's appnote.txt. */
- local const unsigned short cplens[31] = { /* Copy lengths for literal codes 257..285 */
- 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
- 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
- /* see note #13 above about 258 */
- local const unsigned short cplext[31] = { /* Extra bits for literal codes 257..285 */
- 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
- 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 112, 112}; /* 112==invalid */
- local const unsigned short cpdist[30] = { /* Copy offsets for distance codes 0..29 */
- 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
- 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
- 8193, 12289, 16385, 24577};
- local const unsigned short cpdext[30] = { /* Extra bits for distance codes */
- 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
- 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
- 12, 12, 13, 13};
-
- /* build fixed tables only once--keep them here */
- local char fixed_built = 0;
- local inflate_huft fixed_mem[FIXEDH];
- local uInt fixed_bl=9;
- local uInt fixed_bd=5;
- local inflate_huft *fixed_tl;
- local inflate_huft *fixed_td;
-
- /* copy as much as possible from the sliding window to the output area */
- local void inflate_flush(z)
- z_streamp z;
- {
- inflate_blocks_statef *s = &z->blocks;
- uInt n;
- Bytef *q;
-
- /* local copies of source and destination pointers */
- q = s->read;
-
- again:
- /* compute number of bytes to copy as far as end of window */
- n = (uInt)((q <= s->write ? s->write : s->end) - q);
- n = min(n, z->avail_out);
-
- /* update counters */
- z->avail_out -= n;
- //z->total_out += n;
-
- /* copy as far as end of window */
- zmemcpy(z->next_out, q, n);
- z->next_out += n;
- q += n;
-
- /* see if more to copy at beginning of window */
- if (q == s->end)
- {
- /* wrap pointers */
- q = s->window;
- if (s->write == s->end)
- s->write = s->window;
-
- /* do the same for the beginning of the window */
- goto again;
- }
-
- /* update pointers */
- s->read = q;
- }
-
- #define BMAX 15 /* maximum bit length of any code */
-
- local int huft_build(
- uIntf *b, /* code lengths in bits (all assumed <= BMAX) */
- uInt n, /* number of codes (assumed <= 288) */
- uInt s, /* number of simple-valued codes (0..s-1) */
- const unsigned short *d, /* list of base values for non-simple codes */
- const unsigned short *e, /* list of extra bits for non-simple codes */
- inflate_huft * FAR *t, /* result: starting table */
- uIntf *m, /* maximum lookup bits, returns actual */
- inflate_huft *hp, /* space for trees */
- uInt *hn) /* working area: values in order of bit length */
- {
- static uIntf v[288]; /* work area for huft_build */
- uInt a; /* counter for codes of length k */
- uInt c[BMAX+1]; /* bit length count table */
- uInt f; /* i repeats in table every f entries */
- int g; /* maximum code length */
- int h; /* table level */
- uInt i; /* counter, current code */
- uInt j; /* counter */
- int k; /* number of bits in current code */
- int l; /* bits per table (returned in m) */
- uIntf *p; /* pointer into c[], b[], or v[] */
- inflate_huft *q; /* points to current table */
- struct inflate_huft_s r; /* table entry for structure assignment */
- inflate_huft *u[BMAX]; /* table stack */
- int w; /* bits before this table == (l * h) */
- uInt x[BMAX+1]; /* bit offsets, then code stack */
- uIntf *xp; /* pointer into x */
- int y; /* number of dummy codes added */
- uInt z; /* number of entries in current table */
-
-
- /* Generate counts for each bit length */
- p=c;
- y=16; while (y--) *p++ = 0;
- p = b;
- i = n;
- do {
- c[*p++]++; /* assume all entries <= BMAX */
- } while (--i);
- if (c[0] == n) /* null input--all zero length codes */
- {
- *t = (inflate_huft *)Z_NULL;
- *m = 0;
- return Z_OK;
- }
-
-
- /* Find minimum and maximum length, bound *m by those */
- l = *m;
- for (j = 1; j <= BMAX; j++)
- if (c[j])
- break;
- k = j; /* minimum code length */
- if ((uInt)l < j)
- l = j;
- for (i = BMAX; i; i--)
- if (c[i])
- break;
- g = i; /* maximum code length */
- if ((uInt)l > i)
- l = i;
- *m = l;
-
-
- /* Adjust last length count to fill out codes, if needed */
- for (y = 1 << j; j < i; j++, y <<= 1)
- if ((y -= c[j]) < 0)
- return Z_DATA_ERROR;
- if ((y -= c[i]) < 0)
- return Z_DATA_ERROR;
- c[i] += y;
-
-
- /* Generate starting offsets into the value table for each length */
- x[1] = j = 0;
- p = c + 1; xp = x + 2;
- while (--i) { /* note that i == g from above */
- *xp++ = (j += *p++);
- }
-
-
- /* Make a table of values in order of bit lengths */
- p = b; i = 0;
- do {
- if ((j = *p++) != 0)
- v[x[j]++] = i;
- } while (++i < n);
- n = x[g]; /* set n to length of v */
-
-
- /* Generate the Huffman codes and for each, make the table entries */
- x[0] = i = 0; /* first Huffman code is zero */
- p = v; /* grab values in bit order */
- h = -1; /* no tables yet--level -1 */
- w = -l; /* bits decoded == (l * h) */
- u[0] = (inflate_huft *)Z_NULL; /* just to keep compilers happy */
- q = (inflate_huft *)Z_NULL; /* ditto */
- z = 0; /* ditto */
-
- /* go through the bit lengths (k already is bits in shortest code) */
- for (; k <= g; k++)
- {
- a = c[k];
- while (a--)
- {
- int nextw=w;
- /* here i is the Huffman code of length k bits for value *p */
- /* make tables up to required level */
- while (k > (nextw=w + l))
- {
- h++;
-
- /* compute minimum size table less than or equal to l bits */
- z = g - nextw;
- z = z > (uInt)l ? l : z; /* table size upper limit */
- if ((f = 1 << (j = k - nextw)) > a + 1) /* try a k-w bit table */
- { /* too few codes for k-w bit table */
- f -= a + 1; /* deduct codes from patterns left */
- xp = c + k;
- if (j < z)
- while (++j < z && (f <<= 1) > *++xp) /* try smaller tables up to z bits */
- {
- f -= *xp; /* else deduct codes from patterns */
- }
- }
- z = 1 << j; /* table entries for j-bit table */
-
- /* allocate new table */
- if (*hn + z > MANY) /* (note: doesn't matter for fixed) */
- return Z_MEM_ERROR; /* not enough memory */
- u[h] = q = hp + *hn;
- *hn += z;
-
- /* connect to last table, if there is one */
- if (h)
- {
- x[h] = i; /* save pattern for backing up */
- r.bits = (Byte)l; /* bits to dump before this table */
- r.exop = (Byte)j; /* bits in this table */
- j = i >> w;
- r.base = (uInt)(q - u[h-1] - j); /* offset to this table */
- u[h-1][j] = r; /* connect to last table */
- }
- else
- *t = q; /* first table is returned result */
- w=nextw; /* previous table always l bits */
- }
-
- /* set up table entry in r */
- r.bits = (Byte)(k - w);
- if (p >= v + n)
- r.exop = 128 + 64; /* out of values--invalid code */
- else if (*p < s)
- {
- r.exop = (Byte)(*p < 256 ? 0 : 32 + 64); /* 256 is end-of-block */
- r.base = *p++; /* simple code is just the value */
- }
- else
- {
- r.exop = (Byte)(e[*p - s] + 16 + 64);/* non-simple--look up in lists */
- r.base = d[*p++ - s];
- }
-
- /* fill code-like entries with r */
- f = 1 << (k - w);
- for (j = i >> w; j < z; j += f)
- q[j] = r;
-
- /* backwards increment the k-bit code i */
- for (j = 1 << (k - 1); i & j; j >>= 1)
- i ^= j;
- i ^= j;
-
- /* backup over finished tables */
- while ((i & ((1 << w) - 1)) != x[h])
- {
- h--; /* don't need to update q */
- w -= l;
- }
- }
- }
-
-
- /* Return Z_BUF_ERROR if we were given an incomplete table */
- return (y != 0 && g != 1) ? Z_BUF_ERROR : Z_OK;
- }
-
- int inflate(z_streamp z)
- {
- inflate_blocks_statef *s = &z->blocks;
- inflate_codes_statef *c = &s->sub.decode.t_codes; /* codes state */
-
- // lousy two bytes saved by doing this
- struct
- {
- uInt t; /* temporary storage */
- uLong b; /* bit buffer */
- uInt k; /* bits in bit buffer */
- Bytef *p; /* input data pointer */
- uInt n; /* bytes available there */
- Bytef *q; /* output window write pointer */
- uInt m; /* bytes to end of window or read pointer */
-
- /* CODES variables */
-
- inflate_huft *j; /* temporary pointer */
- uInt e; /* extra bits or operation */
- Bytef *f; /* pointer to copy strings from */
- } _state;
-
- #define t _state.t
- #define b _state.b
- #define k _state.k
- #define p _state.p
- #define n _state.n
- #define q _state.q
- #define m _state.m
-
- /* copy input/output information to locals (UPDATE macro restores) */
- LOAD
-
- /* process input based on current state */
- for (;;) switch (s->mode)
- {
- case TYPE:
- NEEDBITS(3)
- t = (uInt)b & 7;
- DUMPBITS(3)
- s->last = (t & 1) ? DRY : TYPE;
- switch (t >> 1)
- {
- case 0: /* stored */
- Tracev((stderr, "inflate: stored block%s\n",
- LAST ? " (last)" : ""));
- DUMPBITS(k&7)
- s->mode = LENS; /* get length of stored block */
- break;
- case 1: /* fixed */
- Tracev((stderr, "inflate: fixed codes block%s\n",
- LAST ? " (last)" : ""));
- {
- if (!fixed_built)
- {
- int _k; /* temporary variable */
- uInt f = 0; /* number of hufts used in fixed_mem */
- static uIntf c[288]; /* length list for huft_build */
-
- /* literal table */
- for (_k = 0; _k < 288; _k++)
- {
- char v=8;
- if (_k > 143)
- {
- if (_k < 256) v++;
- else if (_k < 280) v--;
- }
- c[_k] = v;
- }
-
- huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl, fixed_mem, &f);
-
- /* distance table */
- for (_k = 0; _k < 30; _k++) c[_k] = 5;
-
- huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd, fixed_mem, &f);
-
- /* done */
- fixed_built++;
- }
-
- //s->sub.decode.t_codes.mode = CODES_START;
- s->sub.decode.t_codes.lbits = (Byte)fixed_bl;
- s->sub.decode.t_codes.dbits = (Byte)fixed_bd;
- s->sub.decode.t_codes.ltree = fixed_tl;
- s->sub.decode.t_codes.dtree = fixed_td;
- }
- s->mode = CODES_START;
- break;
- case 2: /* dynamic */
- Tracev((stderr, "inflate: dynamic codes block%s\n",
- LAST ? " (last)" : ""));
- s->mode = TABLE;
- break;
- case 3: /* illegal */
- /* the only illegal value possible is 3 because we check only 2 bits */
- goto bad;
- }
- break;
- case LENS:
- NEEDBITS(16)
- s->sub.left = (uInt)b & 0xffff;
- b = k = 0; /* dump bits */
- Tracev((stderr, "inflate: stored length %u\n", s->sub.left));
- s->mode = s->sub.left ? STORED : s->last;
- break;
- case STORED:
- {
- uInt mn;
-
- if (n == 0)
- LEAVE(Z_OK)
- NEEDOUT
- mn = min(m, n);
- t = min(s->sub.left, mn);
- zmemcpy(q, p, t);
- p += t; n -= t;
- q += t; m -= t;
- if (!(s->sub.left -= t))
- s->mode = s->last;
- break;
- }
- case TABLE:
- NEEDBITS(14)
- s->sub.trees.table = t = (uInt)b & 0x3fff;
- if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29)
- {
- s->mode = BAD;
- LEAVE(Z_DATA_ERROR);
- }
- //t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
- DUMPBITS(14)
- s->sub.trees.index = 0;
- Tracev((stderr, "inflate: table sizes ok\n"));
- s->mode = BTREE;
- case BTREE:
- while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
- {
- NEEDBITS(3)
- s->sub.trees.t_blens[border[s->sub.trees.index++]] = (uInt)b & 7;
- DUMPBITS(3)
- }
- while (s->sub.trees.index < 19)
- s->sub.trees.t_blens[border[s->sub.trees.index++]] = 0;
- s->sub.trees.bb = 7;
-
- {
- uInt hn = 0; /* hufts used in space */
-
- t = huft_build(s->sub.trees.t_blens, 19, 19, (short *)Z_NULL, (short*)Z_NULL,
- &s->sub.trees.tb, &s->sub.trees.bb, s->hufts, &hn);
- if (t != Z_OK || !s->sub.trees.bb)
- {
- s->mode = BAD;
- break;
- }
- }
-
- s->sub.trees.index = 0;
- Tracev((stderr, "inflate: bits tree ok\n"));
- s->mode = DTREE;
- case DTREE:
- while (t = s->sub.trees.table,
- s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
- {
- inflate_huft *h;
- uInt i, j, c;
-
- t = s->sub.trees.bb;
- NEEDBITS(t)
- h = s->sub.trees.tb + ((uInt)b & (uInt)inflate_mask[t]);
- t = h->bits;
- c = h->base;
- if (c < 16)
- {
- DUMPBITS(t)
- s->sub.trees.t_blens[s->sub.trees.index++] = c;
- }
- else /* c == 16..18 */
- {
- if (c == 18)
- {
- i=7;
- j=11;
- }
- else
- {
- i=c-14;
- j=3;
- }
- NEEDBITS(t+i)
- DUMPBITS(t)
- j += (uInt)b & (uInt)inflate_mask[i];
- DUMPBITS(i)
- i = s->sub.trees.index;
- t = s->sub.trees.table;
- if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
- (c == 16 && i < 1))
- {
- s->mode = BAD;
- LEAVE(Z_DATA_ERROR);
- }
- c = c == 16 ? s->sub.trees.t_blens[i - 1] : 0;
- do {
- s->sub.trees.t_blens[i++] = c;
- } while (--j);
- s->sub.trees.index = i;
- }
- }
- s->sub.trees.tb = Z_NULL;
- {
- uInt hn = 0; /* hufts used in space */
- uInt bl, bd;
- inflate_huft *tl, *td;
- int nl,nd;
- t = s->sub.trees.table;
-
- nl = 257 + (t & 0x1f);
- nd = 1 + ((t >> 5) & 0x1f);
- bl = 9; /* must be <= 9 for lookahead assumptions */
- bd = 6; /* must be <= 9 for lookahead assumptions */
-
- t = huft_build(s->sub.trees.t_blens, nl, 257, cplens, cplext, &tl, &bl, s->hufts, &hn);
- if (bl == 0) t = Z_DATA_ERROR;
- if (t == Z_OK)
- {
- /* build distance tree */
- t = huft_build(s->sub.trees.t_blens + nl, nd, 0, cpdist, cpdext, &td, &bd, s->hufts, &hn);
- }
- if (t != Z_OK || (bd == 0 && nl > 257))
- {
- s->mode = BAD;
- LEAVE(Z_DATA_ERROR);
- }
- Tracev((stderr, "inflate: trees ok\n"));
-
- //s->sub.decode.t_codes.mode = CODES_START;
- s->sub.decode.t_codes.lbits = (Byte)bl;
- s->sub.decode.t_codes.dbits = (Byte)bd;
- s->sub.decode.t_codes.ltree = tl;
- s->sub.decode.t_codes.dtree = td;
- }
- s->mode = CODES_START;
-
- #define j (_state.j)
- #define e (_state.e)
- #define f (_state.f)
-
- /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
-
- case CODES_START: /* x: set up for LEN */
- c->sub.code.need = c->lbits;
- c->sub.code.tree = c->ltree;
- s->mode = CODES_LEN;
- case CODES_LEN: /* i: get length/literal/eob next */
- t = c->sub.code.need;
- NEEDBITS(t)
- j = c->sub.code.tree + ((uInt)b & (uInt)inflate_mask[t]);
- DUMPBITS(j->bits)
- e = (uInt)(j->exop);
- if (e == 0) /* literal */
- {
- c->sub.lit = j->base;
- s->mode = CODES_LIT;
- break;
- }
- if (e & 16) /* length */
- {
- c->sub.copy.get = e & 15;
- c->len = j->base;
- s->mode = CODES_LENEXT;
- break;
- }
- if ((e & 64) == 0) /* next table */
- {
- c->sub.code.need = e;
- c->sub.code.tree = j + j->base;
- break;
- }
- if (e & 32) /* end of block */
- {
- s->mode = CODES_WASH;
- break;
- }
- goto bad;
- case CODES_LENEXT: /* i: getting length extra (have base) */
- t = c->sub.copy.get;
- NEEDBITS(t)
- c->len += (uInt)b & (uInt)inflate_mask[t];
- DUMPBITS(t)
- c->sub.code.need = c->dbits;
- c->sub.code.tree = c->dtree;
- s->mode = CODES_DIST;
- case CODES_DIST: /* i: get distance next */
- t = c->sub.code.need;
- NEEDBITS(t)
- j = c->sub.code.tree + ((uInt)b & (uInt)inflate_mask[t]);
- DUMPBITS(j->bits)
- e = (uInt)(j->exop);
- if (e & 16) /* distance */
- {
- c->sub.copy.get = e & 15;
- c->sub.copy.dist = j->base;
- s->mode = CODES_DISTEXT;
- break;
- }
- if ((e & 64) == 0) /* next table */
- {
- c->sub.code.need = e;
- c->sub.code.tree = j + j->base;
- break;
- }
- goto bad; /* invalid code */
- case CODES_DISTEXT: /* i: getting distance extra */
- t = c->sub.copy.get;
- NEEDBITS(t)
- c->sub.copy.dist += (uInt)b & (uInt)inflate_mask[t];
- DUMPBITS(t)
- s->mode = CODES_COPY;
- case CODES_COPY: /* o: copying bytes in window, waiting for space */
- f = (uInt)(q - s->window) < c->sub.copy.dist ?
- s->end - (c->sub.copy.dist - (q - s->window)) :
- q - c->sub.copy.dist;
-
- while (c->len)
- {
- NEEDOUT
- OUTBYTE(*f++)
- if (f == s->end)
- f = s->window;
- c->len--;
- }
- s->mode = CODES_START;
- break;
- case CODES_LIT: /* o: got literal, waiting for output space */
- NEEDOUT
- OUTBYTE(c->sub.lit)
- s->mode = CODES_START;
- break;
- case CODES_WASH: /* o: got eob, possibly more output */
- if (k > 7) /* return unused byte, if any */
- {
- k -= 8;
- n++;
- p--; /* can always return one */
- }
- /* flushing will be done in DRY */
-
- #undef j
- #undef e
- #undef f
-
- case DRY:
- FLUSH
- if (s->write != s->read)
- LEAVE(Z_OK)
- if (s->mode == CODES_WASH)
- {
- Tracev((stderr, "inflate: codes end, %lu total out\n",
- z->total_out + (q >= s->read ? q - s->read :
- (s->end - s->read) + (q - s->window))));
- }
- /* DRY if last, TYPE if not */
- s->mode = s->last;
- if (s->mode == TYPE)
- break;
- LEAVE(Z_STREAM_END)
- //case BAD:
- //r = Z_DATA_ERROR;
- //LEAVE
- default: // we'll call Z_STREAM_ERROR if BAD anyway
- bad:
- s->mode = BAD;
- LEAVE(Z_STREAM_ERROR)
- }
- }
-
- #undef t
- #undef b
- #undef k
- #undef p
- #undef n
- #undef q
- #undef m
-
-
- #endif
-