126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "common/endian.h"
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#include "glk/scott/types.h"
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#include "glk/scott/unp64/unp64.h"
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#include "glk/scott/unp64/exo_util.h"
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namespace Glk {
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namespace Scott {
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void scnMasterCompressor(UnpStr *unp) {
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byte *mem;
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int p;
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if (unp->_idFlag)
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return;
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mem = unp->_mem;
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if (unp->_depAdr == 0) {
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for (p = 0x80d; p < 0x880; p++) {
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if (u32eqmasked(mem + p + 0x005, 0x00ffffff, 0x00BDD2A2) &&
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u32eq(mem + p + 0x00a, 0xE000F99D) &&
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u32eq(mem + p + 0x017, 0xCAEDD0CA) &&
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u32eq(mem + p + 0x031, 0x84C82E86) &&
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u32eqmasked(mem + p + 0x035, 0x0000ffff, 0x00004C2D) &&
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u32eq(mem + p + 0x134, 0xDBD0FFE6)) {
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if (/*mem[p]==0x78&&*/ mem[p + 1] == 0xa9 &&
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u32eq(mem + p + 0x003, 0xD2A20185)) {
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unp->_depAdr = READ_LE_UINT16(&mem[p + 0x37]);
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unp->_forced = p + 1;
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if (mem[p + 0x12b] == 0x020) // jsr $0400, unuseful fx
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mem[p + 0x12b] = 0x2c;
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} else if (u32eq(mem + p, 0xD024E0E8)) {
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/* HTL version */
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unp->_depAdr = READ_LE_UINT16(&mem[p + 0x37]);
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unp->_forced = 0x840;
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}
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if (unp->_depAdr) {
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unp->_retAdr = READ_LE_UINT16(&mem[p + 0x13e]);
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unp->_endAdr = 0x2d;
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unp->_fStrBf = unp->_endAdr;
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unp->_idFlag = 1;
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return;
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}
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}
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}
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}
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if (unp->_depAdr == 0) {
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for (p = 0x80d; p < 0x880; p++) {
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if (u32eqmasked(mem + p + 0x005, 0x00ffffff, 0x00BDD2A2) &&
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u32eq(mem + p + 0x00a, 0xE000F99D) &&
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u32eq(mem + p + 0x017, 0xCAEDD0CA) &&
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u32eq(mem + p + 0x031, 0x84C82E86) &&
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u32eqmasked(mem + p + 0x035, 0x0000ffff, 0x00004C2D) &&
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u32eq(mem + p + 0x12d, 0xe2D0FFE6)) {
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if (mem[p + 1] == 0xa9 &&
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u32eq(mem + p + 0x003, 0xD2A20185)) {
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unp->_depAdr = READ_LE_UINT16(&mem[p + 0x37]);
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unp->_forced = p + 1;
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}
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if (unp->_depAdr) {
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if (mem[p + 0x136] == 0x4c)
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unp->_retAdr = READ_LE_UINT16(&mem[p + 0x137]);
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else if (mem[p + 0x13d] == 0x4c)
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unp->_retAdr = READ_LE_UINT16(&mem[p + 0x13e]);
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unp->_endAdr = 0x2d;
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unp->_fStrBf = unp->_endAdr;
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unp->_idFlag = 1;
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return;
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}
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}
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}
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}
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if (unp->_depAdr == 0) {
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p = 0x812;
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if (u32eq(mem + p + 0x000, 0xE67800A0) &&
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u32eq(mem + p + 0x004, 0x0841B901) &&
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u32eq(mem + p + 0x008, 0xB900FA99) &&
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u32eq(mem + p + 0x00c, 0x34990910)) {
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unp->_depAdr = 0x100;
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unp->_forced = p;
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unp->_retAdr = READ_LE_UINT16(&mem[0x943]); // mem[0x943] | mem[0x944] << 8;
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unp->_endAdr = 0x2d;
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unp->_fStrBf = unp->_endAdr;
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unp->_idFlag = 1;
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return;
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}
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}
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/* Fred/Channel4 hack */
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if (unp->_depAdr == 0) {
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if (u32eq(mem + 0x811, 0xA9A98078) &&
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u32eq(mem + 0x815, 0x85EE8034) &&
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u32eq(mem + 0x819, 0x802DA201) &&
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u32eq(mem + 0x882, 0x01004C2D)) {
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unp->_depAdr = 0x100;
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unp->_forced = 0x811;
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unp->_retAdr = READ_LE_UINT16(&mem[0x98b]); // mem[0x98b] | mem[0x98c] << 8;
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if (unp->_retAdr < 0x800)
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unp->_rtAFrc = 1;
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unp->_endAdr = 0x2d;
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unp->_idFlag = 1;
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return;
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}
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}
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}
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} // End of namespace Scott
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} // End of namespace Glk
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