mirror of https://github.com/OpenRCT2/OpenRCT2.git
263 lines
6.3 KiB
C
263 lines
6.3 KiB
C
/*****************************************************************************
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* Copyright (c) 2014 Ted John
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* This file is part of OpenRCT2.
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*
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* OpenRCT2 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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* 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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* 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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#include <memory.h>
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#include <stdio.h>
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#include "addresses.h"
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#include "object.h"
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#include "sawyercoding.h"
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/**
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*
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* rct2: 0x006A985D
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*/
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int object_load(int groupIndex, rct_object_entry *entry)
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{
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RCT2_CALLPROC_X(0x006A985D, 0, 0, groupIndex, 0, 0, 0, (int)entry);
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#ifdef _MSC_VER
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__asm jb fail
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#else
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__asm__ goto ( "jb %l0" : : : : fail );
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#endif
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return 1;
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fail:
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return 0;
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}
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/**
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*
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* rct2: 0x006A9CAF
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*/
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void object_unload(int groupIndex, rct_object_entry_extended *entry)
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{
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RCT2_CALLPROC_X(0x006A9CAF, 0, groupIndex, 0, 0, 0, 0, (int)entry);
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}
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static int object_entry_compare(rct_object_entry *a, rct_object_entry *b)
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{
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if (a->flags & 0xF0) {
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if ((a->flags & 0x0F) != (b->flags & 0x0F))
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return 0;
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if (*((uint32*)a->name) != *((uint32*)b->name))
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return 0;
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if (*((uint32*)(&a->name[4])) != *((uint32*)(&b->name[4])))
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return 0;
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} else {
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if (a->flags != b->flags)
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return 0;
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if (*((uint32*)a->name) != *((uint32*)b->name))
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return 0;
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if (*((uint32*)(&a->name[4])) != *((uint32*)(&b->name[4])))
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return 0;
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if (a->checksum != b->checksum)
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return 0;
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}
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return 1;
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}
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static int object_calculate_checksum(rct_object_entry *entry, char *data, int dataLength)
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{
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int i;
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char *eee = (char*)entry;
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int checksum = 0xF369A75B;
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char *ccc = (char*)&checksum;
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*ccc ^= eee[0];
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checksum = rol32(checksum, 11);
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for (i = 4; i < 12; i++) {
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*ccc ^= eee[i];
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checksum = rol32(checksum, 11);
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}
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for (i = 0; i < dataLength; i++) {
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*ccc ^= data[i];
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checksum = rol32(checksum, 11);
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}
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return checksum;
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}
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/**
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* rct2: 0x66B355 part
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* If al is 0
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* chunk : esi
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*/
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int object_scenario_load_custom_text(char* chunk){
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int ebp = (int)(&((uint32*)chunk)[2]);
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int edx = 0;
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int eax, ebx, ecx, edi;
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RCT2_CALLFUNC_X(0x6A9E24, &eax, &ebx, &ecx, &edx, (int*)&chunk, &edi, &ebp);
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*((uint16*)chunk) = eax;
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edx++;
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RCT2_CALLFUNC_X(0x6A9E24, &eax, &ebx, &ecx, &edx, (int*)&chunk, &edi, &ebp);
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*((uint16*)chunk + 1) = eax;
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edx++;
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RCT2_CALLFUNC_X(0x6A9E24, &eax, &ebx, &ecx, &edx, (int*)&chunk, &edi, &ebp);
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*((uint16*)chunk + 2) = eax;
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if (RCT2_GLOBAL(0x9ADAF4, int) == -1)return 0;
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else *(RCT2_GLOBAL(0x9ADAF4, uint32*)) = 0;
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return 1;
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}
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int object_paint(int type, int eax, int ebx, int ecx, int edx, int esi, int edi, int ebp)
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{
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if (type == 10){
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if (eax == 0) return object_scenario_load_custom_text((char*)esi);
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}
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RCT2_CALLPROC_X(RCT2_ADDRESS(0x0098D9D4, uint32)[type], eax, ebx, ecx, edx, esi, edi, ebp);
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#ifdef _MSC_VER
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__asm jb success
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#else
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__asm__ goto ( "jb %l0" : : : : success );
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#endif
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return 0;
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success:
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return 1;
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}
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/**
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*
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* rct2: 0x006A9428
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*/
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int object_get_scenario_text(rct_object_entry *entry)
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{
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// RCT2_CALLPROC_X(0x006A9428, 0, 0, 0, 0, 0, 0, (int)entry); return;
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int i;
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rct_object_entry *installedObject = RCT2_GLOBAL(RCT2_ADDRESS_INSTALLED_OBJECT_LIST, rct_object_entry*);
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for (i = 0; i < RCT2_GLOBAL(0x00F42B6C, sint32); i++) {
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if (object_entry_compare(installedObject, entry)) {
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char path[260];
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char *objectPath = (char*)installedObject + 16;
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subsitute_path(path, RCT2_ADDRESS(RCT2_ADDRESS_OBJECT_DATA_PATH, char), objectPath);
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rct_object_entry openedEntry;
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FILE *file = fopen(path, "rb");
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if (file != NULL) {
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fread(&openedEntry, sizeof(rct_object_entry), 1, file);
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if (object_entry_compare(&openedEntry, entry)) {
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// Get chunk size
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char *pos = (char*)installedObject + 16;
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do {
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pos++;
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} while (*(pos - 1) != 0);
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// Read chunk
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int chunkSize = *((uint32*)pos);
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char *chunk;
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if (chunkSize == 0xFFFFFFFF) {
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chunk = malloc(0x600000);
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chunkSize = sawyercoding_read_chunk(file, chunk);
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chunk = realloc(chunk, chunkSize);
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} else {
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chunk = malloc(chunkSize);
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sawyercoding_read_chunk(file, chunk);
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}
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fclose(file);
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// Calculate and check checksum
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if (object_calculate_checksum(&openedEntry, chunk, chunkSize) != openedEntry.checksum) {
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RCT2_GLOBAL(0x00F42BD9, uint8) = 2;
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free(chunk);
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return 0;
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}
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if (object_paint(openedEntry.flags & 0x0F, 2, 0, 0, 0, (int)chunk, 0, 0)) {
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RCT2_GLOBAL(0x00F42BD9, uint8) = 3;
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free(chunk);
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return 0;
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}
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int yyy = RCT2_GLOBAL(0x009ADAF0, uint32);
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RCT2_GLOBAL(0x009ADAF0, uint32) = 0x726E;
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RCT2_GLOBAL(0x009ADAF8, uint32) = (int)chunk;
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*((rct_object_entry*)0x00F42BC8) = openedEntry;
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RCT2_GLOBAL(0x009ADAFC, uint8) = 255;
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RCT2_GLOBAL(0x009ADAFD, uint8) = 1;
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object_paint(openedEntry.flags & 0x0F, 0, 0, 0, 0, (int)chunk, 0, 0);
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RCT2_GLOBAL(0x009ADAFC, uint8) = 0;
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RCT2_GLOBAL(0x009ADAFD, uint8) = 0;
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RCT2_GLOBAL(0x009ADAF0, uint32) = yyy;
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return 1;
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}
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fclose(file);
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}
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}
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installedObject = object_get_next(installedObject);
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}
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RCT2_GLOBAL(0x00F42BD9, uint8) = 0;
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return 0;
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}
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/**
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*
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* rct2: 0x006A982D
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*/
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void object_free_scenario_text()
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{
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if (RCT2_GLOBAL(0x009ADAF8, void*) != NULL) {
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free(RCT2_GLOBAL(0x009ADAF8, void*));
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RCT2_GLOBAL(0x009ADAF8, void*) = NULL;
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}
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}
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int object_get_length(rct_object_entry *entry)
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{
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return (int)object_get_next(entry) - (int)entry;
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}
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rct_object_entry *object_get_next(rct_object_entry *entry)
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{
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char *pos = (char*)entry;
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// Skip
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pos += 16;
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// Skip filename
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do {
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pos++;
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} while (*(pos - 1) != 0);
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// Skip
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pos += 4;
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// Skip name
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do {
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pos++;
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} while (*(pos - 1) != 0);
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// Skip
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pos += 4;
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// Skip
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pos += *pos++ * 16;
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// Skip theme objects
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pos += *pos++ * 16;
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// Skip
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pos += 4;
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return (rct_object_entry*)pos;
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} |