filename | src/dreamcast.c |
changeset | 167:71c0cc416a64 |
prev | 146:f91fa34ab219 |
next | 180:e6dcf9b65658 |
author | nkeynes |
date | Mon Jun 19 11:00:42 2006 +0000 (17 years ago) |
permissions | -rw-r--r-- |
last change | Add config value retrieval for pathnames Implement default path for disc + save state loaders Dump disc ID when mounting a CD |
file | annotate | diff | log | raw |
nkeynes@26 | 1 | /** |
nkeynes@167 | 2 | * $Id: dreamcast.c,v 1.17 2006-06-19 11:00:40 nkeynes Exp $ |
nkeynes@26 | 3 | * Central switchboard for the system. This pulls all the individual modules |
nkeynes@26 | 4 | * together into some kind of coherent structure. This is also where you'd |
nkeynes@26 | 5 | * add Naomi support, if I ever get a board to play with... |
nkeynes@26 | 6 | * |
nkeynes@26 | 7 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@26 | 8 | * |
nkeynes@26 | 9 | * This program is free software; you can redistribute it and/or modify |
nkeynes@26 | 10 | * it under the terms of the GNU General Public License as published by |
nkeynes@26 | 11 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@26 | 12 | * (at your option) any later version. |
nkeynes@26 | 13 | * |
nkeynes@26 | 14 | * This program is distributed in the hope that it will be useful, |
nkeynes@26 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@26 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@26 | 17 | * GNU General Public License for more details. |
nkeynes@26 | 18 | */ |
nkeynes@26 | 19 | |
nkeynes@18 | 20 | #include <errno.h> |
nkeynes@144 | 21 | #include <glib/gstrfuncs.h> |
nkeynes@2 | 22 | #include "dream.h" |
nkeynes@2 | 23 | #include "mem.h" |
nkeynes@11 | 24 | #include "aica/aica.h" |
nkeynes@2 | 25 | #include "asic.h" |
nkeynes@2 | 26 | #include "dreamcast.h" |
nkeynes@25 | 27 | #include "gdrom/ide.h" |
nkeynes@25 | 28 | #include "maple/maple.h" |
nkeynes@15 | 29 | |
nkeynes@26 | 30 | /** |
nkeynes@26 | 31 | * Current state of the DC virtual machine |
nkeynes@26 | 32 | */ |
nkeynes@26 | 33 | #define STATE_UNINIT 0 |
nkeynes@26 | 34 | #define STATE_RUNNING 1 |
nkeynes@26 | 35 | #define STATE_STOPPING 2 |
nkeynes@26 | 36 | #define STATE_STOPPED 3 |
nkeynes@26 | 37 | static volatile int dreamcast_state = STATE_UNINIT; |
nkeynes@26 | 38 | static uint32_t timeslice_length = DEFAULT_TIMESLICE_LENGTH; |
nkeynes@26 | 39 | static char *dreamcast_config = "DEFAULT"; |
nkeynes@2 | 40 | |
nkeynes@15 | 41 | #define MAX_MODULES 32 |
nkeynes@15 | 42 | static int num_modules = 0; |
nkeynes@16 | 43 | dreamcast_module_t modules[MAX_MODULES]; |
nkeynes@15 | 44 | |
nkeynes@16 | 45 | /** |
nkeynes@35 | 46 | * The unknown module is used for logging files without an actual module |
nkeynes@35 | 47 | * declaration |
nkeynes@35 | 48 | */ |
nkeynes@35 | 49 | struct dreamcast_module unknown_module = { "****", NULL, NULL, NULL, NULL, |
nkeynes@35 | 50 | NULL, NULL, NULL }; |
nkeynes@35 | 51 | |
nkeynes@35 | 52 | /** |
nkeynes@16 | 53 | * This function is responsible for defining how all the pieces of the |
nkeynes@26 | 54 | * dreamcast actually fit together. |
nkeynes@16 | 55 | * |
nkeynes@16 | 56 | * Note currently the locations of the various MMIO pages are hard coded in |
nkeynes@16 | 57 | * the MMIO definitions - they should probably be moved here. |
nkeynes@16 | 58 | */ |
nkeynes@15 | 59 | void dreamcast_configure( ) |
nkeynes@15 | 60 | { |
nkeynes@16 | 61 | /* Register the memory framework */ |
nkeynes@15 | 62 | dreamcast_register_module( &mem_module ); |
nkeynes@16 | 63 | |
nkeynes@16 | 64 | /* Setup standard memory map */ |
nkeynes@146 | 65 | mem_create_repeating_ram_region( 0x0C000000, 16 MB, MEM_REGION_MAIN, 0x01000000, 0x0F000000 ); |
nkeynes@16 | 66 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO ); |
nkeynes@16 | 67 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH ); |
nkeynes@16 | 68 | mem_create_ram_region( 0x05000000, 8 MB, MEM_REGION_VIDEO ); |
nkeynes@167 | 69 | mem_load_rom( dreamcast_get_config_value(CONFIG_BIOS_PATH), |
nkeynes@167 | 70 | 0x00000000, 0x00200000, 0x89f2b1a1 ); |
nkeynes@146 | 71 | mem_create_ram_region( 0x00200000, 0x00020000, MEM_REGION_FLASH ); |
nkeynes@167 | 72 | mem_load_block( dreamcast_get_config_value(CONFIG_FLASH_PATH), |
nkeynes@167 | 73 | 0x00200000, 0x00020000 ); |
nkeynes@16 | 74 | |
nkeynes@16 | 75 | /* Load in the rest of the core modules */ |
nkeynes@15 | 76 | dreamcast_register_module( &sh4_module ); |
nkeynes@15 | 77 | dreamcast_register_module( &asic_module ); |
nkeynes@15 | 78 | dreamcast_register_module( &pvr2_module ); |
nkeynes@15 | 79 | dreamcast_register_module( &aica_module ); |
nkeynes@15 | 80 | dreamcast_register_module( &maple_module ); |
nkeynes@15 | 81 | dreamcast_register_module( &ide_module ); |
nkeynes@15 | 82 | } |
nkeynes@15 | 83 | |
nkeynes@71 | 84 | /** |
nkeynes@71 | 85 | * Constructs a system configuration for the AICA in standalone mode, |
nkeynes@71 | 86 | * ie sound chip only. |
nkeynes@71 | 87 | */ |
nkeynes@71 | 88 | void dreamcast_configure_aica_only( ) |
nkeynes@71 | 89 | { |
nkeynes@71 | 90 | dreamcast_register_module( &mem_module ); |
nkeynes@71 | 91 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO ); |
nkeynes@71 | 92 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH ); |
nkeynes@71 | 93 | dreamcast_register_module( &aica_module ); |
nkeynes@89 | 94 | aica_enable(); |
nkeynes@71 | 95 | dreamcast_state = STATE_STOPPED; |
nkeynes@71 | 96 | } |
nkeynes@71 | 97 | |
nkeynes@15 | 98 | void dreamcast_register_module( dreamcast_module_t module ) |
nkeynes@15 | 99 | { |
nkeynes@15 | 100 | modules[num_modules++] = module; |
nkeynes@16 | 101 | if( module->init != NULL ) |
nkeynes@16 | 102 | module->init(); |
nkeynes@15 | 103 | } |
nkeynes@15 | 104 | |
nkeynes@15 | 105 | |
nkeynes@2 | 106 | void dreamcast_init( void ) |
nkeynes@2 | 107 | { |
nkeynes@15 | 108 | dreamcast_configure(); |
nkeynes@23 | 109 | dreamcast_state = STATE_STOPPED; |
nkeynes@2 | 110 | } |
nkeynes@2 | 111 | |
nkeynes@2 | 112 | void dreamcast_reset( void ) |
nkeynes@2 | 113 | { |
nkeynes@15 | 114 | int i; |
nkeynes@15 | 115 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 116 | if( modules[i]->reset != NULL ) |
nkeynes@15 | 117 | modules[i]->reset(); |
nkeynes@15 | 118 | } |
nkeynes@2 | 119 | } |
nkeynes@2 | 120 | |
nkeynes@23 | 121 | void dreamcast_run( void ) |
nkeynes@15 | 122 | { |
nkeynes@15 | 123 | int i; |
nkeynes@23 | 124 | if( dreamcast_state != STATE_RUNNING ) { |
nkeynes@23 | 125 | for( i=0; i<num_modules; i++ ) { |
nkeynes@23 | 126 | if( modules[i]->start != NULL ) |
nkeynes@23 | 127 | modules[i]->start(); |
nkeynes@23 | 128 | } |
nkeynes@15 | 129 | } |
nkeynes@23 | 130 | dreamcast_state = STATE_RUNNING; |
nkeynes@23 | 131 | while( dreamcast_state == STATE_RUNNING ) { |
nkeynes@27 | 132 | int time_to_run = timeslice_length; |
nkeynes@23 | 133 | for( i=0; i<num_modules; i++ ) { |
nkeynes@23 | 134 | if( modules[i]->run_time_slice != NULL ) |
nkeynes@27 | 135 | time_to_run = modules[i]->run_time_slice( time_to_run ); |
nkeynes@23 | 136 | } |
nkeynes@23 | 137 | |
nkeynes@23 | 138 | } |
nkeynes@23 | 139 | |
nkeynes@15 | 140 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 141 | if( modules[i]->stop != NULL ) |
nkeynes@15 | 142 | modules[i]->stop(); |
nkeynes@15 | 143 | } |
nkeynes@23 | 144 | dreamcast_state = STATE_STOPPED; |
nkeynes@2 | 145 | } |
nkeynes@15 | 146 | |
nkeynes@23 | 147 | void dreamcast_stop( void ) |
nkeynes@23 | 148 | { |
nkeynes@23 | 149 | if( dreamcast_state == STATE_RUNNING ) |
nkeynes@23 | 150 | dreamcast_state = STATE_STOPPING; |
nkeynes@23 | 151 | } |
nkeynes@17 | 152 | |
nkeynes@26 | 153 | gboolean dreamcast_is_running( void ) |
nkeynes@26 | 154 | { |
nkeynes@26 | 155 | return dreamcast_state == STATE_RUNNING; |
nkeynes@26 | 156 | } |
nkeynes@26 | 157 | |
nkeynes@30 | 158 | /***************************** User Configuration **************************/ |
nkeynes@30 | 159 | |
nkeynes@167 | 160 | |
nkeynes@144 | 161 | static struct dreamcast_config_entry global_config[] = |
nkeynes@144 | 162 | {{ "bios", CONFIG_TYPE_FILE, "dcboot.rom" }, |
nkeynes@144 | 163 | { "flash", CONFIG_TYPE_FILE, "dcflash.rom" }, |
nkeynes@144 | 164 | { "default path", CONFIG_TYPE_PATH, "." }, |
nkeynes@144 | 165 | { "save path", CONFIG_TYPE_PATH, "save" }, |
nkeynes@144 | 166 | { "bootstrap", CONFIG_TYPE_FILE, "IP.BIN" }, |
nkeynes@144 | 167 | { NULL, CONFIG_TYPE_NONE }}; |
nkeynes@144 | 168 | |
nkeynes@144 | 169 | static struct dreamcast_config_entry serial_config[] = |
nkeynes@144 | 170 | {{ "device", CONFIG_TYPE_FILE, "/dev/ttyS1" }, |
nkeynes@144 | 171 | { NULL, CONFIG_TYPE_NONE }}; |
nkeynes@144 | 172 | |
nkeynes@144 | 173 | struct dreamcast_config_group dreamcast_config_root[] = |
nkeynes@144 | 174 | {{ "global", global_config }, |
nkeynes@144 | 175 | { "controllers", NULL }, |
nkeynes@144 | 176 | { "serial", serial_config }, |
nkeynes@144 | 177 | { NULL, CONFIG_TYPE_NONE }}; |
nkeynes@144 | 178 | |
nkeynes@144 | 179 | void dreamcast_set_default_config( ) |
nkeynes@144 | 180 | { |
nkeynes@144 | 181 | struct dreamcast_config_group *group = dreamcast_config_root; |
nkeynes@144 | 182 | while( group->key != NULL ) { |
nkeynes@144 | 183 | struct dreamcast_config_entry *param = group->params; |
nkeynes@144 | 184 | if( param != NULL ) { |
nkeynes@144 | 185 | while( param->key != NULL ) { |
nkeynes@144 | 186 | if( param->value != param->default_value ) { |
nkeynes@144 | 187 | if( param->value != NULL ) |
nkeynes@144 | 188 | free( param->value ); |
nkeynes@144 | 189 | param->value = (gchar *)param->default_value; |
nkeynes@144 | 190 | } |
nkeynes@144 | 191 | param++; |
nkeynes@144 | 192 | } |
nkeynes@144 | 193 | } |
nkeynes@144 | 194 | group++; |
nkeynes@144 | 195 | } |
nkeynes@144 | 196 | maple_detach_all(); |
nkeynes@144 | 197 | } |
nkeynes@144 | 198 | |
nkeynes@167 | 199 | const gchar *dreamcast_get_config_value( int key ) |
nkeynes@167 | 200 | { |
nkeynes@167 | 201 | return global_config[key].value; |
nkeynes@167 | 202 | } |
nkeynes@167 | 203 | |
nkeynes@144 | 204 | gboolean dreamcast_load_config( const gchar *filename ) |
nkeynes@144 | 205 | { |
nkeynes@144 | 206 | FILE *f = fopen(filename, "ro"); |
nkeynes@144 | 207 | gboolean result; |
nkeynes@144 | 208 | |
nkeynes@144 | 209 | if( f == NULL ) { |
nkeynes@144 | 210 | ERROR( "Unable to open '%s': %s", filename, strerror(errno) ); |
nkeynes@144 | 211 | return FALSE; |
nkeynes@144 | 212 | } |
nkeynes@144 | 213 | |
nkeynes@144 | 214 | result = dreamcast_load_config_stream( f ); |
nkeynes@144 | 215 | fclose(f); |
nkeynes@144 | 216 | return result; |
nkeynes@144 | 217 | } |
nkeynes@144 | 218 | |
nkeynes@144 | 219 | gboolean dreamcast_load_config_stream( FILE *f ) |
nkeynes@30 | 220 | { |
nkeynes@30 | 221 | |
nkeynes@144 | 222 | char buf[512], *p; |
nkeynes@144 | 223 | int maple_device = -1, maple_subdevice = -1; |
nkeynes@144 | 224 | struct dreamcast_config_group devgroup; |
nkeynes@144 | 225 | struct dreamcast_config_group *group = NULL; |
nkeynes@144 | 226 | maple_device_t device = NULL; |
nkeynes@144 | 227 | dreamcast_set_default_config(); |
nkeynes@30 | 228 | |
nkeynes@144 | 229 | while( fgets( buf, sizeof(buf), f ) != NULL ) { |
nkeynes@144 | 230 | g_strstrip(buf); |
nkeynes@144 | 231 | if( buf[0] == '#' ) |
nkeynes@144 | 232 | continue; |
nkeynes@144 | 233 | if( *buf == '[' ) { |
nkeynes@144 | 234 | char *p = strchr(buf, ']'); |
nkeynes@144 | 235 | if( p != NULL ) { |
nkeynes@144 | 236 | struct dreamcast_config_group *tmp_group; |
nkeynes@144 | 237 | maple_device = maple_subdevice = -1; |
nkeynes@144 | 238 | *p = '\0'; |
nkeynes@144 | 239 | g_strstrip(buf+1); |
nkeynes@144 | 240 | tmp_group = &dreamcast_config_root[0]; |
nkeynes@144 | 241 | while( tmp_group->key != NULL ) { |
nkeynes@144 | 242 | if( strcasecmp(tmp_group->key, buf+1) == 0 ) { |
nkeynes@144 | 243 | group = tmp_group; |
nkeynes@144 | 244 | break; |
nkeynes@144 | 245 | } |
nkeynes@144 | 246 | tmp_group++; |
nkeynes@144 | 247 | } |
nkeynes@144 | 248 | } |
nkeynes@144 | 249 | } else if( group != NULL ) { |
nkeynes@144 | 250 | char *value = strchr( buf, '=' ); |
nkeynes@144 | 251 | if( value != NULL ) { |
nkeynes@144 | 252 | struct dreamcast_config_entry *param = group->params; |
nkeynes@144 | 253 | *value = '\0'; |
nkeynes@144 | 254 | value++; |
nkeynes@144 | 255 | g_strstrip(buf); |
nkeynes@144 | 256 | g_strstrip(value); |
nkeynes@144 | 257 | if( strcmp(group->key,"controllers") == 0 ) { |
nkeynes@144 | 258 | if( g_strncasecmp( buf, "device ", 7 ) == 0 ) { |
nkeynes@144 | 259 | maple_device = strtoul( buf+7, NULL, 0 ); |
nkeynes@144 | 260 | if( maple_device < 0 || maple_device > 3 ) { |
nkeynes@144 | 261 | ERROR( "Device number must be between 0..3 (not '%s')", buf+7); |
nkeynes@144 | 262 | continue; |
nkeynes@144 | 263 | } |
nkeynes@144 | 264 | maple_subdevice = 0; |
nkeynes@144 | 265 | device = maple_new_device( value ); |
nkeynes@144 | 266 | if( device == NULL ) { |
nkeynes@144 | 267 | ERROR( "Unrecognized device '%s'", value ); |
nkeynes@144 | 268 | } else { |
nkeynes@144 | 269 | devgroup.key = "controllers"; |
nkeynes@144 | 270 | devgroup.params = maple_get_device_config(device); |
nkeynes@144 | 271 | maple_attach_device( device, maple_device, maple_subdevice ); |
nkeynes@144 | 272 | group = &devgroup; |
nkeynes@144 | 273 | } |
nkeynes@144 | 274 | continue; |
nkeynes@144 | 275 | } else if( g_strncasecmp( buf, "subdevice ", 10 ) == 0 ) { |
nkeynes@144 | 276 | maple_subdevice = strtoul( buf+10, NULL, 0 ); |
nkeynes@144 | 277 | if( maple_device == -1 ) { |
nkeynes@144 | 278 | ERROR( "Subdevice not allowed without primary device" ); |
nkeynes@144 | 279 | } else if( maple_subdevice < 1 || maple_subdevice > 5 ) { |
nkeynes@144 | 280 | ERROR( "Subdevice must be between 1..5 (not '%s')", buf+10 ); |
nkeynes@144 | 281 | } else if( (device = maple_new_device(value)) == NULL ) { |
nkeynes@144 | 282 | ERROR( "Unrecognized subdevice '%s'", value ); |
nkeynes@144 | 283 | } else { |
nkeynes@144 | 284 | devgroup.key = "controllers"; |
nkeynes@144 | 285 | devgroup.params = maple_get_device_config(device); |
nkeynes@144 | 286 | maple_attach_device( device, maple_device, maple_subdevice ); |
nkeynes@144 | 287 | group = &devgroup; |
nkeynes@144 | 288 | } |
nkeynes@144 | 289 | continue; |
nkeynes@144 | 290 | } |
nkeynes@144 | 291 | } |
nkeynes@144 | 292 | while( param->key != NULL ) { |
nkeynes@144 | 293 | if( strcasecmp( param->key, buf ) == 0 ) { |
nkeynes@144 | 294 | param->value = g_strdup(value); |
nkeynes@144 | 295 | break; |
nkeynes@144 | 296 | } |
nkeynes@144 | 297 | param++; |
nkeynes@144 | 298 | } |
nkeynes@144 | 299 | } |
nkeynes@144 | 300 | } |
nkeynes@144 | 301 | } |
nkeynes@144 | 302 | return TRUE; |
nkeynes@30 | 303 | } |
nkeynes@30 | 304 | |
nkeynes@144 | 305 | gboolean dreamcast_save_config( const gchar *filename ) |
nkeynes@30 | 306 | { |
nkeynes@144 | 307 | FILE *f = fopen(filename, "wo"); |
nkeynes@144 | 308 | gboolean result; |
nkeynes@144 | 309 | if( f == NULL ) { |
nkeynes@144 | 310 | ERROR( "Unable to open '%s': %s", filename, strerror(errno) ); |
nkeynes@144 | 311 | return FALSE; |
nkeynes@144 | 312 | } |
nkeynes@144 | 313 | result = dreamcast_save_config_stream(f); |
nkeynes@144 | 314 | fclose(f); |
nkeynes@144 | 315 | } |
nkeynes@30 | 316 | |
nkeynes@144 | 317 | gboolean dreamcast_save_config_stream( FILE *f ) |
nkeynes@144 | 318 | { |
nkeynes@144 | 319 | struct dreamcast_config_group *group = &dreamcast_config_root[0]; |
nkeynes@144 | 320 | |
nkeynes@144 | 321 | while( group->key != NULL ) { |
nkeynes@144 | 322 | struct dreamcast_config_entry *entry = group->params; |
nkeynes@144 | 323 | fprintf( f, "[%s]\n", group->key ); |
nkeynes@144 | 324 | |
nkeynes@144 | 325 | if( entry != NULL ) { |
nkeynes@144 | 326 | while( entry->key != NULL ) { |
nkeynes@144 | 327 | fprintf( f, "%s = %s\n", entry->key, entry->value ); |
nkeynes@144 | 328 | entry++; |
nkeynes@144 | 329 | } |
nkeynes@144 | 330 | } else if( strcmp(group->key, "controllers") == 0 ) { |
nkeynes@144 | 331 | int i,j; |
nkeynes@144 | 332 | for( i=0; i<4; i++ ) { |
nkeynes@144 | 333 | for( j=0; j<6; j++ ) { |
nkeynes@144 | 334 | maple_device_t dev = maple_get_device( i, j ); |
nkeynes@144 | 335 | if( dev != NULL ) { |
nkeynes@144 | 336 | if( j == 0 ) |
nkeynes@144 | 337 | fprintf( f, "Device %d = %s\n", i, dev->device_class->name ); |
nkeynes@144 | 338 | else |
nkeynes@144 | 339 | fprintf( f, "Subdevice %d = %s\n", j, dev->device_class->name ); |
nkeynes@144 | 340 | entry = dev->get_config(dev); |
nkeynes@144 | 341 | while( entry->key != NULL ) { |
nkeynes@144 | 342 | fprintf( f, "%*c%s = %s\n", j==0?4:8, ' ',entry->key, entry->value ); |
nkeynes@144 | 343 | entry++; |
nkeynes@144 | 344 | } |
nkeynes@144 | 345 | } |
nkeynes@144 | 346 | } |
nkeynes@144 | 347 | } |
nkeynes@144 | 348 | } |
nkeynes@144 | 349 | fprintf( f, "\n" ); |
nkeynes@144 | 350 | group++; |
nkeynes@144 | 351 | } |
nkeynes@144 | 352 | return TRUE; |
nkeynes@30 | 353 | } |
nkeynes@26 | 354 | |
nkeynes@26 | 355 | /********************************* Save States *****************************/ |
nkeynes@26 | 356 | |
nkeynes@26 | 357 | #define DREAMCAST_SAVE_MAGIC "%!-DreamOn!Save\0" |
nkeynes@26 | 358 | #define DREAMCAST_SAVE_VERSION 0x00010000 |
nkeynes@26 | 359 | |
nkeynes@26 | 360 | struct save_state_header { |
nkeynes@26 | 361 | char magic[16]; |
nkeynes@26 | 362 | uint32_t version; |
nkeynes@26 | 363 | uint32_t module_count; |
nkeynes@26 | 364 | }; |
nkeynes@26 | 365 | |
nkeynes@18 | 366 | int dreamcast_load_state( const gchar *filename ) |
nkeynes@15 | 367 | { |
nkeynes@17 | 368 | int i,j; |
nkeynes@17 | 369 | uint32_t count, len; |
nkeynes@17 | 370 | int have_read[MAX_MODULES]; |
nkeynes@17 | 371 | char tmp[64]; |
nkeynes@15 | 372 | struct save_state_header header; |
nkeynes@18 | 373 | FILE *f; |
nkeynes@18 | 374 | |
nkeynes@18 | 375 | f = fopen( filename, "r" ); |
nkeynes@18 | 376 | if( f == NULL ) return errno; |
nkeynes@15 | 377 | |
nkeynes@15 | 378 | fread( &header, sizeof(header), 1, f ); |
nkeynes@15 | 379 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) { |
nkeynes@15 | 380 | ERROR( "Not a DreamOn save state file" ); |
nkeynes@17 | 381 | return 1; |
nkeynes@15 | 382 | } |
nkeynes@15 | 383 | if( header.version != DREAMCAST_SAVE_VERSION ) { |
nkeynes@15 | 384 | ERROR( "DreamOn save state version not supported" ); |
nkeynes@17 | 385 | return 1; |
nkeynes@17 | 386 | } |
nkeynes@18 | 387 | if( header.module_count > MAX_MODULES ) { |
nkeynes@18 | 388 | ERROR( "DreamOn save state is corrupted (bad module count)" ); |
nkeynes@17 | 389 | return 1; |
nkeynes@17 | 390 | } |
nkeynes@17 | 391 | for( i=0; i<MAX_MODULES; i++ ) { |
nkeynes@17 | 392 | have_read[i] = 0; |
nkeynes@15 | 393 | } |
nkeynes@15 | 394 | |
nkeynes@18 | 395 | for( i=0; i<header.module_count; i++ ) { |
nkeynes@17 | 396 | fread(tmp, 4, 1, f ); |
nkeynes@18 | 397 | if( strncmp(tmp, "BLCK", 4) != 0 ) { |
nkeynes@18 | 398 | ERROR( "DreamOn save state is corrupted (missing block header %d)", i ); |
nkeynes@17 | 399 | return 2; |
nkeynes@17 | 400 | } |
nkeynes@17 | 401 | len = fread_string(tmp, sizeof(tmp), f ); |
nkeynes@17 | 402 | if( len > 64 || len < 1 ) { |
nkeynes@18 | 403 | ERROR( "DreamOn save state is corrupted (bad string)" ); |
nkeynes@17 | 404 | return 2; |
nkeynes@17 | 405 | } |
nkeynes@17 | 406 | |
nkeynes@17 | 407 | /* Find the matching module by name */ |
nkeynes@17 | 408 | for( j=0; j<num_modules; j++ ) { |
nkeynes@17 | 409 | if( strcmp(modules[j]->name,tmp) == 0 ) { |
nkeynes@17 | 410 | have_read[j] = 1; |
nkeynes@17 | 411 | if( modules[j]->load == NULL ) { |
nkeynes@18 | 412 | ERROR( "DreamOn save state is corrupted (no loader for %s)", modules[j]->name ); |
nkeynes@17 | 413 | return 2; |
nkeynes@17 | 414 | } else if( modules[j]->load(f) != 0 ) { |
nkeynes@18 | 415 | ERROR( "DreamOn save state is corrupted (%s failed)", modules[j]->name ); |
nkeynes@17 | 416 | return 2; |
nkeynes@17 | 417 | } |
nkeynes@17 | 418 | break; |
nkeynes@17 | 419 | } |
nkeynes@17 | 420 | } |
nkeynes@17 | 421 | if( j == num_modules ) { |
nkeynes@17 | 422 | ERROR( "DreamOn save state contains unrecognized section" ); |
nkeynes@17 | 423 | return 2; |
nkeynes@17 | 424 | } |
nkeynes@17 | 425 | } |
nkeynes@17 | 426 | |
nkeynes@17 | 427 | /* Any modules that we didn't load - reset to the default state. |
nkeynes@17 | 428 | * (ie it's not an error to skip a module if you don't actually |
nkeynes@17 | 429 | * care about its state). |
nkeynes@17 | 430 | */ |
nkeynes@17 | 431 | for( j=0; j<num_modules; j++ ) { |
nkeynes@17 | 432 | if( have_read[j] == 0 && modules[j]->reset != NULL ) { |
nkeynes@17 | 433 | modules[j]->reset(); |
nkeynes@17 | 434 | } |
nkeynes@15 | 435 | } |
nkeynes@18 | 436 | fclose(f); |
nkeynes@18 | 437 | INFO( "Save state read from %s", filename ); |
nkeynes@15 | 438 | } |
nkeynes@15 | 439 | |
nkeynes@18 | 440 | int dreamcast_save_state( const gchar *filename ) |
nkeynes@15 | 441 | { |
nkeynes@15 | 442 | int i; |
nkeynes@18 | 443 | FILE *f; |
nkeynes@15 | 444 | struct save_state_header header; |
nkeynes@15 | 445 | |
nkeynes@18 | 446 | f = fopen( filename, "w" ); |
nkeynes@18 | 447 | if( f == NULL ) |
nkeynes@18 | 448 | return errno; |
nkeynes@15 | 449 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC ); |
nkeynes@15 | 450 | header.version = DREAMCAST_SAVE_VERSION; |
nkeynes@18 | 451 | header.module_count = 0; |
nkeynes@18 | 452 | |
nkeynes@18 | 453 | for( i=0; i<num_modules; i++ ) { |
nkeynes@18 | 454 | if( modules[i]->save != NULL ) |
nkeynes@18 | 455 | header.module_count++; |
nkeynes@18 | 456 | } |
nkeynes@15 | 457 | fwrite( &header, sizeof(header), 1, f ); |
nkeynes@15 | 458 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 459 | if( modules[i]->save != NULL ) { |
nkeynes@17 | 460 | fwrite( "BLCK", 4, 1, f ); |
nkeynes@17 | 461 | fwrite_string( modules[i]->name, f ); |
nkeynes@15 | 462 | modules[i]->save(f); |
nkeynes@15 | 463 | } |
nkeynes@15 | 464 | } |
nkeynes@18 | 465 | fclose( f ); |
nkeynes@18 | 466 | INFO( "Save state written to %s", filename ); |
nkeynes@15 | 467 | } |
nkeynes@15 | 468 |
.