nkeynes@26 | 1 | /**
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nkeynes@277 | 2 | * $Id: dreamcast.c,v 1.20 2007-01-12 10:16:02 nkeynes Exp $
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nkeynes@26 | 3 | * Central switchboard for the system. This pulls all the individual modules
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nkeynes@26 | 4 | * together into some kind of coherent structure. This is also where you'd
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nkeynes@26 | 5 | * add Naomi support, if I ever get a board to play with...
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nkeynes@26 | 6 | *
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nkeynes@26 | 7 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@26 | 8 | *
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nkeynes@26 | 9 | * This program is free software; you can redistribute it and/or modify
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nkeynes@26 | 10 | * it under the terms of the GNU General Public License as published by
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nkeynes@26 | 11 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@26 | 12 | * (at your option) any later version.
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nkeynes@26 | 13 | *
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nkeynes@26 | 14 | * This program is distributed in the hope that it will be useful,
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nkeynes@26 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@26 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@26 | 17 | * GNU General Public License for more details.
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nkeynes@26 | 18 | */
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nkeynes@26 | 19 |
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nkeynes@18 | 20 | #include <errno.h>
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nkeynes@144 | 21 | #include <glib/gstrfuncs.h>
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nkeynes@2 | 22 | #include "dream.h"
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nkeynes@2 | 23 | #include "mem.h"
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nkeynes@11 | 24 | #include "aica/aica.h"
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nkeynes@2 | 25 | #include "asic.h"
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nkeynes@2 | 26 | #include "dreamcast.h"
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nkeynes@25 | 27 | #include "gdrom/ide.h"
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nkeynes@25 | 28 | #include "maple/maple.h"
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nkeynes@15 | 29 |
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nkeynes@26 | 30 | /**
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nkeynes@26 | 31 | * Current state of the DC virtual machine
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nkeynes@26 | 32 | */
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nkeynes@26 | 33 | #define STATE_UNINIT 0
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nkeynes@26 | 34 | #define STATE_RUNNING 1
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nkeynes@26 | 35 | #define STATE_STOPPING 2
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nkeynes@26 | 36 | #define STATE_STOPPED 3
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nkeynes@26 | 37 | static volatile int dreamcast_state = STATE_UNINIT;
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nkeynes@26 | 38 | static uint32_t timeslice_length = DEFAULT_TIMESLICE_LENGTH;
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nkeynes@26 | 39 | static char *dreamcast_config = "DEFAULT";
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nkeynes@2 | 40 |
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nkeynes@15 | 41 | #define MAX_MODULES 32
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nkeynes@15 | 42 | static int num_modules = 0;
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nkeynes@16 | 43 | dreamcast_module_t modules[MAX_MODULES];
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nkeynes@15 | 44 |
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nkeynes@16 | 45 | /**
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nkeynes@35 | 46 | * The unknown module is used for logging files without an actual module
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nkeynes@35 | 47 | * declaration
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nkeynes@35 | 48 | */
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nkeynes@35 | 49 | struct dreamcast_module unknown_module = { "****", NULL, NULL, NULL, NULL,
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nkeynes@35 | 50 | NULL, NULL, NULL };
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nkeynes@35 | 51 |
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nkeynes@35 | 52 | /**
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nkeynes@16 | 53 | * This function is responsible for defining how all the pieces of the
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nkeynes@26 | 54 | * dreamcast actually fit together.
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nkeynes@16 | 55 | *
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nkeynes@16 | 56 | * Note currently the locations of the various MMIO pages are hard coded in
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nkeynes@16 | 57 | * the MMIO definitions - they should probably be moved here.
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nkeynes@16 | 58 | */
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nkeynes@15 | 59 | void dreamcast_configure( )
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nkeynes@15 | 60 | {
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nkeynes@265 | 61 | dreamcast_register_module( &eventq_module );
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nkeynes@16 | 62 | /* Register the memory framework */
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nkeynes@15 | 63 | dreamcast_register_module( &mem_module );
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nkeynes@16 | 64 |
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nkeynes@16 | 65 | /* Setup standard memory map */
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nkeynes@146 | 66 | mem_create_repeating_ram_region( 0x0C000000, 16 MB, MEM_REGION_MAIN, 0x01000000, 0x0F000000 );
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nkeynes@16 | 67 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO );
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nkeynes@16 | 68 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH );
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nkeynes@16 | 69 | mem_create_ram_region( 0x05000000, 8 MB, MEM_REGION_VIDEO );
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nkeynes@180 | 70 | if( mem_load_rom( dreamcast_get_config_value(CONFIG_BIOS_PATH),
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nkeynes@180 | 71 | 0x00000000, 0x00200000, 0x89f2b1a1 ) == NULL ) {
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nkeynes@180 | 72 | /* Bios wasn't found. Dump an empty ram region in there for something to do */
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nkeynes@180 | 73 | mem_create_ram_region( 0x00000000, 0x00200000, MEM_REGION_BIOS );
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nkeynes@180 | 74 | }
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nkeynes@146 | 75 | mem_create_ram_region( 0x00200000, 0x00020000, MEM_REGION_FLASH );
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nkeynes@167 | 76 | mem_load_block( dreamcast_get_config_value(CONFIG_FLASH_PATH),
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nkeynes@167 | 77 | 0x00200000, 0x00020000 );
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nkeynes@16 | 78 |
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nkeynes@16 | 79 | /* Load in the rest of the core modules */
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nkeynes@15 | 80 | dreamcast_register_module( &sh4_module );
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nkeynes@15 | 81 | dreamcast_register_module( &asic_module );
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nkeynes@15 | 82 | dreamcast_register_module( &pvr2_module );
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nkeynes@15 | 83 | dreamcast_register_module( &aica_module );
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nkeynes@15 | 84 | dreamcast_register_module( &maple_module );
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nkeynes@15 | 85 | dreamcast_register_module( &ide_module );
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nkeynes@15 | 86 | }
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nkeynes@15 | 87 |
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nkeynes@277 | 88 | void dreamcast_save_flash()
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nkeynes@277 | 89 | {
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nkeynes@277 | 90 | char *file = dreamcast_get_config_value(CONFIG_FLASH_PATH);
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nkeynes@277 | 91 | mem_save_block( file, 0x00200000, 0x00020000 );
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nkeynes@277 | 92 | }
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nkeynes@277 | 93 |
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nkeynes@71 | 94 | /**
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nkeynes@71 | 95 | * Constructs a system configuration for the AICA in standalone mode,
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nkeynes@71 | 96 | * ie sound chip only.
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nkeynes@71 | 97 | */
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nkeynes@71 | 98 | void dreamcast_configure_aica_only( )
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nkeynes@71 | 99 | {
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nkeynes@71 | 100 | dreamcast_register_module( &mem_module );
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nkeynes@71 | 101 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO );
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nkeynes@71 | 102 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH );
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nkeynes@71 | 103 | dreamcast_register_module( &aica_module );
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nkeynes@89 | 104 | aica_enable();
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nkeynes@71 | 105 | dreamcast_state = STATE_STOPPED;
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nkeynes@71 | 106 | }
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nkeynes@71 | 107 |
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nkeynes@15 | 108 | void dreamcast_register_module( dreamcast_module_t module )
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nkeynes@15 | 109 | {
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nkeynes@15 | 110 | modules[num_modules++] = module;
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nkeynes@16 | 111 | if( module->init != NULL )
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nkeynes@16 | 112 | module->init();
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nkeynes@15 | 113 | }
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nkeynes@15 | 114 |
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nkeynes@15 | 115 |
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nkeynes@2 | 116 | void dreamcast_init( void )
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nkeynes@2 | 117 | {
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nkeynes@15 | 118 | dreamcast_configure();
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nkeynes@23 | 119 | dreamcast_state = STATE_STOPPED;
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nkeynes@2 | 120 | }
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nkeynes@2 | 121 |
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nkeynes@2 | 122 | void dreamcast_reset( void )
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nkeynes@2 | 123 | {
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nkeynes@15 | 124 | int i;
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nkeynes@15 | 125 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 126 | if( modules[i]->reset != NULL )
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nkeynes@15 | 127 | modules[i]->reset();
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nkeynes@15 | 128 | }
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nkeynes@2 | 129 | }
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nkeynes@2 | 130 |
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nkeynes@23 | 131 | void dreamcast_run( void )
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nkeynes@15 | 132 | {
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nkeynes@15 | 133 | int i;
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nkeynes@23 | 134 | if( dreamcast_state != STATE_RUNNING ) {
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nkeynes@23 | 135 | for( i=0; i<num_modules; i++ ) {
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nkeynes@23 | 136 | if( modules[i]->start != NULL )
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nkeynes@23 | 137 | modules[i]->start();
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nkeynes@23 | 138 | }
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nkeynes@15 | 139 | }
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nkeynes@23 | 140 | dreamcast_state = STATE_RUNNING;
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nkeynes@23 | 141 | while( dreamcast_state == STATE_RUNNING ) {
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nkeynes@27 | 142 | int time_to_run = timeslice_length;
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nkeynes@23 | 143 | for( i=0; i<num_modules; i++ ) {
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nkeynes@23 | 144 | if( modules[i]->run_time_slice != NULL )
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nkeynes@27 | 145 | time_to_run = modules[i]->run_time_slice( time_to_run );
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nkeynes@23 | 146 | }
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nkeynes@23 | 147 |
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nkeynes@23 | 148 | }
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nkeynes@23 | 149 |
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nkeynes@15 | 150 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 151 | if( modules[i]->stop != NULL )
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nkeynes@15 | 152 | modules[i]->stop();
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nkeynes@15 | 153 | }
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nkeynes@23 | 154 | dreamcast_state = STATE_STOPPED;
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nkeynes@2 | 155 | }
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nkeynes@15 | 156 |
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nkeynes@23 | 157 | void dreamcast_stop( void )
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nkeynes@23 | 158 | {
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nkeynes@23 | 159 | if( dreamcast_state == STATE_RUNNING )
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nkeynes@23 | 160 | dreamcast_state = STATE_STOPPING;
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nkeynes@23 | 161 | }
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nkeynes@17 | 162 |
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nkeynes@277 | 163 | void dreamcast_shutdown()
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nkeynes@277 | 164 | {
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nkeynes@277 | 165 | dreamcast_stop();
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nkeynes@277 | 166 | sh4_stop();
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nkeynes@277 | 167 | dreamcast_save_flash();
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nkeynes@277 | 168 | }
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nkeynes@277 | 169 |
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nkeynes@26 | 170 | gboolean dreamcast_is_running( void )
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nkeynes@26 | 171 | {
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nkeynes@26 | 172 | return dreamcast_state == STATE_RUNNING;
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nkeynes@26 | 173 | }
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nkeynes@26 | 174 |
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nkeynes@30 | 175 | /***************************** User Configuration **************************/
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nkeynes@30 | 176 |
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nkeynes@167 | 177 |
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nkeynes@144 | 178 | static struct dreamcast_config_entry global_config[] =
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nkeynes@144 | 179 | {{ "bios", CONFIG_TYPE_FILE, "dcboot.rom" },
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nkeynes@144 | 180 | { "flash", CONFIG_TYPE_FILE, "dcflash.rom" },
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nkeynes@144 | 181 | { "default path", CONFIG_TYPE_PATH, "." },
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nkeynes@144 | 182 | { "save path", CONFIG_TYPE_PATH, "save" },
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nkeynes@144 | 183 | { "bootstrap", CONFIG_TYPE_FILE, "IP.BIN" },
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nkeynes@144 | 184 | { NULL, CONFIG_TYPE_NONE }};
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nkeynes@144 | 185 |
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nkeynes@144 | 186 | static struct dreamcast_config_entry serial_config[] =
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nkeynes@144 | 187 | {{ "device", CONFIG_TYPE_FILE, "/dev/ttyS1" },
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nkeynes@144 | 188 | { NULL, CONFIG_TYPE_NONE }};
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nkeynes@144 | 189 |
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nkeynes@144 | 190 | struct dreamcast_config_group dreamcast_config_root[] =
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nkeynes@144 | 191 | {{ "global", global_config },
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nkeynes@144 | 192 | { "controllers", NULL },
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nkeynes@144 | 193 | { "serial", serial_config },
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nkeynes@144 | 194 | { NULL, CONFIG_TYPE_NONE }};
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nkeynes@144 | 195 |
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nkeynes@144 | 196 | void dreamcast_set_default_config( )
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nkeynes@144 | 197 | {
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nkeynes@144 | 198 | struct dreamcast_config_group *group = dreamcast_config_root;
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nkeynes@144 | 199 | while( group->key != NULL ) {
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nkeynes@144 | 200 | struct dreamcast_config_entry *param = group->params;
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nkeynes@144 | 201 | if( param != NULL ) {
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nkeynes@144 | 202 | while( param->key != NULL ) {
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nkeynes@144 | 203 | if( param->value != param->default_value ) {
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nkeynes@144 | 204 | if( param->value != NULL )
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nkeynes@144 | 205 | free( param->value );
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nkeynes@144 | 206 | param->value = (gchar *)param->default_value;
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nkeynes@144 | 207 | }
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nkeynes@144 | 208 | param++;
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nkeynes@144 | 209 | }
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nkeynes@144 | 210 | }
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nkeynes@144 | 211 | group++;
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nkeynes@144 | 212 | }
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nkeynes@144 | 213 | maple_detach_all();
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nkeynes@144 | 214 | }
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nkeynes@144 | 215 |
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nkeynes@167 | 216 | const gchar *dreamcast_get_config_value( int key )
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nkeynes@167 | 217 | {
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nkeynes@167 | 218 | return global_config[key].value;
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nkeynes@167 | 219 | }
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nkeynes@167 | 220 |
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nkeynes@144 | 221 | gboolean dreamcast_load_config( const gchar *filename )
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nkeynes@144 | 222 | {
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nkeynes@144 | 223 | FILE *f = fopen(filename, "ro");
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nkeynes@144 | 224 | gboolean result;
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nkeynes@144 | 225 |
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nkeynes@144 | 226 | if( f == NULL ) {
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nkeynes@144 | 227 | ERROR( "Unable to open '%s': %s", filename, strerror(errno) );
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nkeynes@144 | 228 | return FALSE;
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nkeynes@144 | 229 | }
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nkeynes@144 | 230 |
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nkeynes@144 | 231 | result = dreamcast_load_config_stream( f );
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nkeynes@144 | 232 | fclose(f);
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nkeynes@144 | 233 | return result;
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nkeynes@144 | 234 | }
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nkeynes@144 | 235 |
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nkeynes@144 | 236 | gboolean dreamcast_load_config_stream( FILE *f )
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nkeynes@30 | 237 | {
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nkeynes@30 | 238 |
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nkeynes@144 | 239 | char buf[512], *p;
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nkeynes@144 | 240 | int maple_device = -1, maple_subdevice = -1;
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nkeynes@144 | 241 | struct dreamcast_config_group devgroup;
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nkeynes@144 | 242 | struct dreamcast_config_group *group = NULL;
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nkeynes@144 | 243 | maple_device_t device = NULL;
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nkeynes@144 | 244 | dreamcast_set_default_config();
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nkeynes@30 | 245 |
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nkeynes@144 | 246 | while( fgets( buf, sizeof(buf), f ) != NULL ) {
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nkeynes@144 | 247 | g_strstrip(buf);
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nkeynes@144 | 248 | if( buf[0] == '#' )
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nkeynes@144 | 249 | continue;
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nkeynes@144 | 250 | if( *buf == '[' ) {
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nkeynes@144 | 251 | char *p = strchr(buf, ']');
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nkeynes@144 | 252 | if( p != NULL ) {
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nkeynes@144 | 253 | struct dreamcast_config_group *tmp_group;
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nkeynes@144 | 254 | maple_device = maple_subdevice = -1;
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nkeynes@144 | 255 | *p = '\0';
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nkeynes@144 | 256 | g_strstrip(buf+1);
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nkeynes@144 | 257 | tmp_group = &dreamcast_config_root[0];
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nkeynes@144 | 258 | while( tmp_group->key != NULL ) {
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nkeynes@144 | 259 | if( strcasecmp(tmp_group->key, buf+1) == 0 ) {
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nkeynes@144 | 260 | group = tmp_group;
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nkeynes@144 | 261 | break;
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nkeynes@144 | 262 | }
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nkeynes@144 | 263 | tmp_group++;
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nkeynes@144 | 264 | }
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nkeynes@144 | 265 | }
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nkeynes@144 | 266 | } else if( group != NULL ) {
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nkeynes@144 | 267 | char *value = strchr( buf, '=' );
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nkeynes@144 | 268 | if( value != NULL ) {
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nkeynes@144 | 269 | struct dreamcast_config_entry *param = group->params;
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nkeynes@144 | 270 | *value = '\0';
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nkeynes@144 | 271 | value++;
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nkeynes@144 | 272 | g_strstrip(buf);
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nkeynes@144 | 273 | g_strstrip(value);
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nkeynes@144 | 274 | if( strcmp(group->key,"controllers") == 0 ) {
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nkeynes@144 | 275 | if( g_strncasecmp( buf, "device ", 7 ) == 0 ) {
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nkeynes@144 | 276 | maple_device = strtoul( buf+7, NULL, 0 );
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nkeynes@144 | 277 | if( maple_device < 0 || maple_device > 3 ) {
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nkeynes@144 | 278 | ERROR( "Device number must be between 0..3 (not '%s')", buf+7);
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nkeynes@144 | 279 | continue;
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nkeynes@144 | 280 | }
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nkeynes@144 | 281 | maple_subdevice = 0;
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nkeynes@144 | 282 | device = maple_new_device( value );
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nkeynes@144 | 283 | if( device == NULL ) {
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nkeynes@144 | 284 | ERROR( "Unrecognized device '%s'", value );
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nkeynes@144 | 285 | } else {
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nkeynes@144 | 286 | devgroup.key = "controllers";
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nkeynes@144 | 287 | devgroup.params = maple_get_device_config(device);
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nkeynes@144 | 288 | maple_attach_device( device, maple_device, maple_subdevice );
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nkeynes@144 | 289 | group = &devgroup;
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nkeynes@144 | 290 | }
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nkeynes@144 | 291 | continue;
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nkeynes@144 | 292 | } else if( g_strncasecmp( buf, "subdevice ", 10 ) == 0 ) {
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nkeynes@144 | 293 | maple_subdevice = strtoul( buf+10, NULL, 0 );
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nkeynes@144 | 294 | if( maple_device == -1 ) {
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nkeynes@144 | 295 | ERROR( "Subdevice not allowed without primary device" );
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nkeynes@144 | 296 | } else if( maple_subdevice < 1 || maple_subdevice > 5 ) {
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nkeynes@144 | 297 | ERROR( "Subdevice must be between 1..5 (not '%s')", buf+10 );
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nkeynes@144 | 298 | } else if( (device = maple_new_device(value)) == NULL ) {
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nkeynes@144 | 299 | ERROR( "Unrecognized subdevice '%s'", value );
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nkeynes@144 | 300 | } else {
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nkeynes@144 | 301 | devgroup.key = "controllers";
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nkeynes@144 | 302 | devgroup.params = maple_get_device_config(device);
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nkeynes@144 | 303 | maple_attach_device( device, maple_device, maple_subdevice );
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nkeynes@144 | 304 | group = &devgroup;
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nkeynes@144 | 305 | }
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nkeynes@144 | 306 | continue;
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nkeynes@144 | 307 | }
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nkeynes@144 | 308 | }
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nkeynes@144 | 309 | while( param->key != NULL ) {
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nkeynes@144 | 310 | if( strcasecmp( param->key, buf ) == 0 ) {
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nkeynes@144 | 311 | param->value = g_strdup(value);
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nkeynes@144 | 312 | break;
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nkeynes@144 | 313 | }
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nkeynes@144 | 314 | param++;
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nkeynes@144 | 315 | }
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nkeynes@144 | 316 | }
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nkeynes@144 | 317 | }
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nkeynes@144 | 318 | }
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nkeynes@144 | 319 | return TRUE;
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nkeynes@30 | 320 | }
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nkeynes@30 | 321 |
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nkeynes@144 | 322 | gboolean dreamcast_save_config( const gchar *filename )
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nkeynes@30 | 323 | {
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nkeynes@144 | 324 | FILE *f = fopen(filename, "wo");
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nkeynes@144 | 325 | gboolean result;
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nkeynes@144 | 326 | if( f == NULL ) {
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nkeynes@144 | 327 | ERROR( "Unable to open '%s': %s", filename, strerror(errno) );
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nkeynes@144 | 328 | return FALSE;
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nkeynes@144 | 329 | }
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nkeynes@144 | 330 | result = dreamcast_save_config_stream(f);
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nkeynes@144 | 331 | fclose(f);
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nkeynes@144 | 332 | }
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nkeynes@30 | 333 |
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nkeynes@144 | 334 | gboolean dreamcast_save_config_stream( FILE *f )
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nkeynes@144 | 335 | {
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nkeynes@144 | 336 | struct dreamcast_config_group *group = &dreamcast_config_root[0];
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nkeynes@144 | 337 |
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nkeynes@144 | 338 | while( group->key != NULL ) {
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nkeynes@144 | 339 | struct dreamcast_config_entry *entry = group->params;
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nkeynes@144 | 340 | fprintf( f, "[%s]\n", group->key );
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nkeynes@144 | 341 |
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nkeynes@144 | 342 | if( entry != NULL ) {
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nkeynes@144 | 343 | while( entry->key != NULL ) {
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nkeynes@144 | 344 | fprintf( f, "%s = %s\n", entry->key, entry->value );
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nkeynes@144 | 345 | entry++;
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nkeynes@144 | 346 | }
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nkeynes@144 | 347 | } else if( strcmp(group->key, "controllers") == 0 ) {
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nkeynes@144 | 348 | int i,j;
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nkeynes@144 | 349 | for( i=0; i<4; i++ ) {
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nkeynes@144 | 350 | for( j=0; j<6; j++ ) {
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nkeynes@144 | 351 | maple_device_t dev = maple_get_device( i, j );
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nkeynes@144 | 352 | if( dev != NULL ) {
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nkeynes@144 | 353 | if( j == 0 )
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nkeynes@144 | 354 | fprintf( f, "Device %d = %s\n", i, dev->device_class->name );
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nkeynes@144 | 355 | else
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nkeynes@144 | 356 | fprintf( f, "Subdevice %d = %s\n", j, dev->device_class->name );
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nkeynes@144 | 357 | entry = dev->get_config(dev);
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nkeynes@144 | 358 | while( entry->key != NULL ) {
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nkeynes@144 | 359 | fprintf( f, "%*c%s = %s\n", j==0?4:8, ' ',entry->key, entry->value );
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nkeynes@144 | 360 | entry++;
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nkeynes@144 | 361 | }
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nkeynes@144 | 362 | }
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nkeynes@144 | 363 | }
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nkeynes@144 | 364 | }
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nkeynes@144 | 365 | }
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nkeynes@144 | 366 | fprintf( f, "\n" );
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nkeynes@144 | 367 | group++;
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nkeynes@144 | 368 | }
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nkeynes@144 | 369 | return TRUE;
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nkeynes@30 | 370 | }
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nkeynes@26 | 371 |
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nkeynes@26 | 372 | /********************************* Save States *****************************/
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nkeynes@26 | 373 |
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nkeynes@180 | 374 | #define DREAMCAST_SAVE_MAGIC "%!-lxDream!Save\0"
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nkeynes@26 | 375 | #define DREAMCAST_SAVE_VERSION 0x00010000
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nkeynes@26 | 376 |
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nkeynes@26 | 377 | struct save_state_header {
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nkeynes@26 | 378 | char magic[16];
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nkeynes@26 | 379 | uint32_t version;
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nkeynes@26 | 380 | uint32_t module_count;
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nkeynes@26 | 381 | };
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nkeynes@26 | 382 |
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nkeynes@18 | 383 | int dreamcast_load_state( const gchar *filename )
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nkeynes@15 | 384 | {
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nkeynes@17 | 385 | int i,j;
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nkeynes@17 | 386 | uint32_t count, len;
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nkeynes@17 | 387 | int have_read[MAX_MODULES];
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nkeynes@17 | 388 | char tmp[64];
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nkeynes@15 | 389 | struct save_state_header header;
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nkeynes@18 | 390 | FILE *f;
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nkeynes@18 | 391 |
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nkeynes@18 | 392 | f = fopen( filename, "r" );
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nkeynes@18 | 393 | if( f == NULL ) return errno;
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nkeynes@15 | 394 |
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nkeynes@15 | 395 | fread( &header, sizeof(header), 1, f );
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nkeynes@15 | 396 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) {
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nkeynes@180 | 397 | ERROR( "Not a %s save state file", APP_NAME );
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nkeynes@17 | 398 | return 1;
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nkeynes@15 | 399 | }
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nkeynes@15 | 400 | if( header.version != DREAMCAST_SAVE_VERSION ) {
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nkeynes@180 | 401 | ERROR( "%s save state version not supported", APP_NAME );
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nkeynes@17 | 402 | return 1;
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nkeynes@17 | 403 | }
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nkeynes@18 | 404 | if( header.module_count > MAX_MODULES ) {
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nkeynes@180 | 405 | ERROR( "%s save state is corrupted (bad module count)", APP_NAME );
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nkeynes@17 | 406 | return 1;
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nkeynes@17 | 407 | }
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nkeynes@17 | 408 | for( i=0; i<MAX_MODULES; i++ ) {
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nkeynes@17 | 409 | have_read[i] = 0;
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nkeynes@15 | 410 | }
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nkeynes@15 | 411 |
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nkeynes@18 | 412 | for( i=0; i<header.module_count; i++ ) {
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nkeynes@17 | 413 | fread(tmp, 4, 1, f );
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nkeynes@18 | 414 | if( strncmp(tmp, "BLCK", 4) != 0 ) {
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nkeynes@180 | 415 | ERROR( "%s save state is corrupted (missing block header %d)", APP_NAME, i );
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nkeynes@17 | 416 | return 2;
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nkeynes@17 | 417 | }
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nkeynes@17 | 418 | len = fread_string(tmp, sizeof(tmp), f );
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nkeynes@17 | 419 | if( len > 64 || len < 1 ) {
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nkeynes@180 | 420 | ERROR( "%s save state is corrupted (bad string)", APP_NAME );
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nkeynes@17 | 421 | return 2;
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nkeynes@17 | 422 | }
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nkeynes@17 | 423 |
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nkeynes@17 | 424 | /* Find the matching module by name */
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nkeynes@17 | 425 | for( j=0; j<num_modules; j++ ) {
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nkeynes@17 | 426 | if( strcmp(modules[j]->name,tmp) == 0 ) {
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nkeynes@17 | 427 | have_read[j] = 1;
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nkeynes@17 | 428 | if( modules[j]->load == NULL ) {
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nkeynes@180 | 429 | ERROR( "%s save state is corrupted (no loader for %s)", APP_NAME, modules[j]->name );
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nkeynes@17 | 430 | return 2;
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nkeynes@17 | 431 | } else if( modules[j]->load(f) != 0 ) {
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nkeynes@180 | 432 | ERROR( "%s save state is corrupted (%s failed)", APP_NAME, modules[j]->name );
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nkeynes@17 | 433 | return 2;
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nkeynes@17 | 434 | }
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nkeynes@17 | 435 | break;
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nkeynes@17 | 436 | }
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nkeynes@17 | 437 | }
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nkeynes@17 | 438 | if( j == num_modules ) {
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nkeynes@180 | 439 | ERROR( "%s save state contains unrecognized section", APP_NAME );
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nkeynes@17 | 440 | return 2;
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nkeynes@17 | 441 | }
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nkeynes@17 | 442 | }
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nkeynes@17 | 443 |
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nkeynes@17 | 444 | /* Any modules that we didn't load - reset to the default state.
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nkeynes@17 | 445 | * (ie it's not an error to skip a module if you don't actually
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nkeynes@17 | 446 | * care about its state).
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nkeynes@17 | 447 | */
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nkeynes@17 | 448 | for( j=0; j<num_modules; j++ ) {
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nkeynes@17 | 449 | if( have_read[j] == 0 && modules[j]->reset != NULL ) {
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nkeynes@17 | 450 | modules[j]->reset();
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nkeynes@17 | 451 | }
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nkeynes@15 | 452 | }
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nkeynes@18 | 453 | fclose(f);
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nkeynes@18 | 454 | INFO( "Save state read from %s", filename );
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nkeynes@15 | 455 | }
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nkeynes@15 | 456 |
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nkeynes@18 | 457 | int dreamcast_save_state( const gchar *filename )
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nkeynes@15 | 458 | {
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nkeynes@15 | 459 | int i;
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nkeynes@18 | 460 | FILE *f;
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nkeynes@15 | 461 | struct save_state_header header;
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nkeynes@15 | 462 |
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nkeynes@18 | 463 | f = fopen( filename, "w" );
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nkeynes@18 | 464 | if( f == NULL )
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nkeynes@18 | 465 | return errno;
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nkeynes@15 | 466 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC );
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nkeynes@15 | 467 | header.version = DREAMCAST_SAVE_VERSION;
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nkeynes@18 | 468 | header.module_count = 0;
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nkeynes@18 | 469 |
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nkeynes@18 | 470 | for( i=0; i<num_modules; i++ ) {
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nkeynes@18 | 471 | if( modules[i]->save != NULL )
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nkeynes@18 | 472 | header.module_count++;
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nkeynes@18 | 473 | }
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nkeynes@15 | 474 | fwrite( &header, sizeof(header), 1, f );
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nkeynes@15 | 475 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 476 | if( modules[i]->save != NULL ) {
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nkeynes@17 | 477 | fwrite( "BLCK", 4, 1, f );
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nkeynes@17 | 478 | fwrite_string( modules[i]->name, f );
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nkeynes@15 | 479 | modules[i]->save(f);
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nkeynes@15 | 480 | }
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nkeynes@15 | 481 | }
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nkeynes@18 | 482 | fclose( f );
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nkeynes@18 | 483 | INFO( "Save state written to %s", filename );
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nkeynes@15 | 484 | }
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nkeynes@15 | 485 |
|