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cabinet: Move the remaining cabextract.c functions to fdi.c.

This commit is contained in:
James Hawkins 2006-01-12 13:30:43 +01:00 committed by Alexandre Julliard
parent 324b11f206
commit 877c8092cf
4 changed files with 164 additions and 212 deletions
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1
dlls/cabinet/Makefile.in
View File

@ -7,7 +7,6 @@ IMPORTLIB = libcabinet.$(IMPLIBEXT)
IMPORTS = kernel32
C_SRCS = \
cabextract.c \
cabinet_main.c \
fci.c \
fdi.c

209
dlls/cabinet/cabextract.c
View File

@ -1,209 +0,0 @@
/*
* cabextract.c
*
* Copyright 2000-2002 Stuart Caie
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Principal author: Stuart Caie <kyzer@4u.net>
*
* Based on specification documents from Microsoft Corporation
* Quantum decompression researched and implemented by Matthew Russoto
* Huffman code adapted from unlzx by Dave Tritscher.
* InfoZip team's INFLATE implementation adapted to MSZIP by Dirk Stoecker.
* Major LZX fixes by Jae Jung.
*/
#include "config.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "cabinet.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(cabinet);
THOSE_ZIP_CONSTS;
/****************************************************************
* QTMupdatemodel (internal)
*/
void QTMupdatemodel(struct QTMmodel *model, int sym) {
struct QTMmodelsym temp;
int i, j;
for (i = 0; i < sym; i++) model->syms[i].cumfreq += 8;
if (model->syms[0].cumfreq > 3800) {
if (--model->shiftsleft) {
for (i = model->entries - 1; i >= 0; i--) {
/* -1, not -2; the 0 entry saves this */
model->syms[i].cumfreq >>= 1;
if (model->syms[i].cumfreq <= model->syms[i+1].cumfreq) {
model->syms[i].cumfreq = model->syms[i+1].cumfreq + 1;
}
}
}
else {
model->shiftsleft = 50;
for (i = 0; i < model->entries ; i++) {
/* no -1, want to include the 0 entry */
/* this converts cumfreqs into frequencies, then shifts right */
model->syms[i].cumfreq -= model->syms[i+1].cumfreq;
model->syms[i].cumfreq++; /* avoid losing things entirely */
model->syms[i].cumfreq >>= 1;
}
/* now sort by frequencies, decreasing order -- this must be an
* inplace selection sort, or a sort with the same (in)stability
* characteristics
*/
for (i = 0; i < model->entries - 1; i++) {
for (j = i + 1; j < model->entries; j++) {
if (model->syms[i].cumfreq < model->syms[j].cumfreq) {
temp = model->syms[i];
model->syms[i] = model->syms[j];
model->syms[j] = temp;
}
}
}
/* then convert frequencies back to cumfreq */
for (i = model->entries - 1; i >= 0; i--) {
model->syms[i].cumfreq += model->syms[i+1].cumfreq;
}
/* then update the other part of the table */
for (i = 0; i < model->entries; i++) {
model->tabloc[model->syms[i].sym] = i;
}
}
}
}
/*************************************************************************
* make_decode_table (internal)
*
* This function was coded by David Tritscher. It builds a fast huffman
* decoding table out of just a canonical huffman code lengths table.
*
* PARAMS
* nsyms: total number of symbols in this huffman tree.
* nbits: any symbols with a code length of nbits or less can be decoded
* in one lookup of the table.
* length: A table to get code lengths from [0 to syms-1]
* table: The table to fill up with decoded symbols and pointers.
*
* RETURNS
* OK: 0
* error: 1
*/
int make_decode_table(cab_ULONG nsyms, cab_ULONG nbits, cab_UBYTE *length, cab_UWORD *table) {
register cab_UWORD sym;
register cab_ULONG leaf;
register cab_UBYTE bit_num = 1;
cab_ULONG fill;
cab_ULONG pos = 0; /* the current position in the decode table */
cab_ULONG table_mask = 1 << nbits;
cab_ULONG bit_mask = table_mask >> 1; /* don't do 0 length codes */
cab_ULONG next_symbol = bit_mask; /* base of allocation for long codes */
/* fill entries for codes short enough for a direct mapping */
while (bit_num <= nbits) {
for (sym = 0; sym < nsyms; sym++) {
if (length[sym] == bit_num) {
leaf = pos;
if((pos += bit_mask) > table_mask) return 1; /* table overrun */
/* fill all possible lookups of this symbol with the symbol itself */
fill = bit_mask;
while (fill-- > 0) table[leaf++] = sym;
}
}
bit_mask >>= 1;
bit_num++;
}
/* if there are any codes longer than nbits */
if (pos != table_mask) {
/* clear the remainder of the table */
for (sym = pos; sym < table_mask; sym++) table[sym] = 0;
/* give ourselves room for codes to grow by up to 16 more bits */
pos <<= 16;
table_mask <<= 16;
bit_mask = 1 << 15;
while (bit_num <= 16) {
for (sym = 0; sym < nsyms; sym++) {
if (length[sym] == bit_num) {
leaf = pos >> 16;
for (fill = 0; fill < bit_num - nbits; fill++) {
/* if this path hasn't been taken yet, 'allocate' two entries */
if (table[leaf] == 0) {
table[(next_symbol << 1)] = 0;
table[(next_symbol << 1) + 1] = 0;
table[leaf] = next_symbol++;
}
/* follow the path and select either left or right for next bit */
leaf = table[leaf] << 1;
if ((pos >> (15-fill)) & 1) leaf++;
}
table[leaf] = sym;
if ((pos += bit_mask) > table_mask) return 1; /* table overflow */
}
}
bit_mask >>= 1;
bit_num++;
}
}
/* full table? */
if (pos == table_mask) return 0;
/* either erroneous table, or all elements are 0 - let's find out. */
for (sym = 0; sym < nsyms; sym++) if (length[sym]) return 1;
return 0;
}
/*************************************************************************
* checksum (internal)
*/
cab_ULONG checksum(cab_UBYTE *data, cab_UWORD bytes, cab_ULONG csum) {
int len;
cab_ULONG ul = 0;
for (len = bytes >> 2; len--; data += 4) {
csum ^= ((data[0]) | (data[1]<<8) | (data[2]<<16) | (data[3]<<24));
}
switch (bytes & 3) {
case 3: ul |= *data++ << 16;
case 2: ul |= *data++ << 8;
case 1: ul |= *data;
}
csum ^= ul;
return csum;
}

3
dlls/cabinet/cabinet.h
View File

@ -635,8 +635,7 @@ typedef struct {
} EXTRACTdest;
/* from cabextract.c */
BOOL process_cabinet(LPCSTR cabname, LPCSTR dir, BOOL fix, BOOL lower, EXTRACTdest *dest);
/* from fdi.c */
void QTMupdatemodel(struct QTMmodel *model, int sym);
int make_decode_table(cab_ULONG nsyms, cab_ULONG nbits, cab_UBYTE *length, cab_UWORD *table);
cab_ULONG checksum(cab_UBYTE *data, cab_UWORD bytes, cab_ULONG csum);

163
dlls/cabinet/fdi.c
View File

@ -148,6 +148,169 @@ typedef struct fdi_cds_fwd {
struct fdi_cds_fwd *next;
} fdi_decomp_state;
/****************************************************************
* QTMupdatemodel (internal)
*/
void QTMupdatemodel(struct QTMmodel *model, int sym) {
struct QTMmodelsym temp;
int i, j;
for (i = 0; i < sym; i++) model->syms[i].cumfreq += 8;
if (model->syms[0].cumfreq > 3800) {
if (--model->shiftsleft) {
for (i = model->entries - 1; i >= 0; i--) {
/* -1, not -2; the 0 entry saves this */
model->syms[i].cumfreq >>= 1;
if (model->syms[i].cumfreq <= model->syms[i+1].cumfreq) {
model->syms[i].cumfreq = model->syms[i+1].cumfreq + 1;
}
}
}
else {
model->shiftsleft = 50;
for (i = 0; i < model->entries ; i++) {
/* no -1, want to include the 0 entry */
/* this converts cumfreqs into frequencies, then shifts right */
model->syms[i].cumfreq -= model->syms[i+1].cumfreq;
model->syms[i].cumfreq++; /* avoid losing things entirely */
model->syms[i].cumfreq >>= 1;
}
/* now sort by frequencies, decreasing order -- this must be an
* inplace selection sort, or a sort with the same (in)stability
* characteristics
*/
for (i = 0; i < model->entries - 1; i++) {
for (j = i + 1; j < model->entries; j++) {
if (model->syms[i].cumfreq < model->syms[j].cumfreq) {
temp = model->syms[i];
model->syms[i] = model->syms[j];
model->syms[j] = temp;
}
}
}
/* then convert frequencies back to cumfreq */
for (i = model->entries - 1; i >= 0; i--) {
model->syms[i].cumfreq += model->syms[i+1].cumfreq;
}
/* then update the other part of the table */
for (i = 0; i < model->entries; i++) {
model->tabloc[model->syms[i].sym] = i;
}
}
}
}
/*************************************************************************
* make_decode_table (internal)
*
* This function was coded by David Tritscher. It builds a fast huffman
* decoding table out of just a canonical huffman code lengths table.
*
* PARAMS
* nsyms: total number of symbols in this huffman tree.
* nbits: any symbols with a code length of nbits or less can be decoded
* in one lookup of the table.
* length: A table to get code lengths from [0 to syms-1]
* table: The table to fill up with decoded symbols and pointers.
*
* RETURNS
* OK: 0
* error: 1
*/
int make_decode_table(cab_ULONG nsyms, cab_ULONG nbits, cab_UBYTE *length, cab_UWORD *table) {
register cab_UWORD sym;
register cab_ULONG leaf;
register cab_UBYTE bit_num = 1;
cab_ULONG fill;
cab_ULONG pos = 0; /* the current position in the decode table */
cab_ULONG table_mask = 1 << nbits;
cab_ULONG bit_mask = table_mask >> 1; /* don't do 0 length codes */
cab_ULONG next_symbol = bit_mask; /* base of allocation for long codes */
/* fill entries for codes short enough for a direct mapping */
while (bit_num <= nbits) {
for (sym = 0; sym < nsyms; sym++) {
if (length[sym] == bit_num) {
leaf = pos;
if((pos += bit_mask) > table_mask) return 1; /* table overrun */
/* fill all possible lookups of this symbol with the symbol itself */
fill = bit_mask;
while (fill-- > 0) table[leaf++] = sym;
}
}
bit_mask >>= 1;
bit_num++;
}
/* if there are any codes longer than nbits */
if (pos != table_mask) {
/* clear the remainder of the table */
for (sym = pos; sym < table_mask; sym++) table[sym] = 0;
/* give ourselves room for codes to grow by up to 16 more bits */
pos <<= 16;
table_mask <<= 16;
bit_mask = 1 << 15;
while (bit_num <= 16) {
for (sym = 0; sym < nsyms; sym++) {
if (length[sym] == bit_num) {
leaf = pos >> 16;
for (fill = 0; fill < bit_num - nbits; fill++) {
/* if this path hasn't been taken yet, 'allocate' two entries */
if (table[leaf] == 0) {
table[(next_symbol << 1)] = 0;
table[(next_symbol << 1) + 1] = 0;
table[leaf] = next_symbol++;
}
/* follow the path and select either left or right for next bit */
leaf = table[leaf] << 1;
if ((pos >> (15-fill)) & 1) leaf++;
}
table[leaf] = sym;
if ((pos += bit_mask) > table_mask) return 1; /* table overflow */
}
}
bit_mask >>= 1;
bit_num++;
}
}
/* full table? */
if (pos == table_mask) return 0;
/* either erroneous table, or all elements are 0 - let's find out. */
for (sym = 0; sym < nsyms; sym++) if (length[sym]) return 1;
return 0;
}
/*************************************************************************
* checksum (internal)
*/
cab_ULONG checksum(cab_UBYTE *data, cab_UWORD bytes, cab_ULONG csum) {
int len;
cab_ULONG ul = 0;
for (len = bytes >> 2; len--; data += 4) {
csum ^= ((data[0]) | (data[1]<<8) | (data[2]<<16) | (data[3]<<24));
}
switch (bytes & 3) {
case 3: ul |= *data++ << 16;
case 2: ul |= *data++ << 8;
case 1: ul |= *data;
}
csum ^= ul;
return csum;
}
/***********************************************************************
* FDICreate (CABINET.20)
*