filename | src/dreamcast.c |
changeset | 839:51f1c4195790 |
prev | 825:2ac7ceccd775 |
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author | nkeynes |
date | Tue Sep 02 03:34:00 2008 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Implement absolute positioning mouse mode when not grabbed enable/disable grab on dreamcast start/stop where it's requested by the controllers |
file | annotate | diff | log | raw |
nkeynes@26 | 1 | /** |
nkeynes@586 | 2 | * $Id$ |
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@543 | 21 | #include <glib.h> |
nkeynes@669 | 22 | #include "lxdream.h" |
nkeynes@740 | 23 | #include "dream.h" |
nkeynes@2 | 24 | #include "mem.h" |
nkeynes@669 | 25 | #include "dreamcast.h" |
nkeynes@669 | 26 | #include "asic.h" |
nkeynes@669 | 27 | #include "syscall.h" |
nkeynes@669 | 28 | #include "gui.h" |
nkeynes@11 | 29 | #include "aica/aica.h" |
nkeynes@25 | 30 | #include "gdrom/ide.h" |
nkeynes@25 | 31 | #include "maple/maple.h" |
nkeynes@669 | 32 | #include "sh4/sh4.h" |
nkeynes@740 | 33 | #include "sh4/sh4core.h" |
nkeynes@15 | 34 | |
nkeynes@26 | 35 | /** |
nkeynes@26 | 36 | * Current state of the DC virtual machine |
nkeynes@26 | 37 | */ |
nkeynes@543 | 38 | typedef enum { STATE_UNINIT=0, STATE_RUNNING, |
nkeynes@736 | 39 | STATE_STOPPING, STATE_STOPPED } dreamcast_state_t; |
nkeynes@736 | 40 | |
nkeynes@543 | 41 | static volatile dreamcast_state_t dreamcast_state = STATE_UNINIT; |
nkeynes@543 | 42 | static gboolean dreamcast_has_bios = FALSE; |
nkeynes@742 | 43 | static gboolean dreamcast_has_flash = FALSE; |
nkeynes@689 | 44 | static gboolean dreamcast_exit_on_stop = FALSE; |
nkeynes@543 | 45 | static gchar *dreamcast_program_name = NULL; |
nkeynes@543 | 46 | static sh4addr_t dreamcast_entry_point = 0xA0000000; |
nkeynes@26 | 47 | static uint32_t timeslice_length = DEFAULT_TIMESLICE_LENGTH; |
nkeynes@689 | 48 | static uint64_t run_time_nanosecs = 0; |
nkeynes@2 | 49 | |
nkeynes@15 | 50 | #define MAX_MODULES 32 |
nkeynes@15 | 51 | static int num_modules = 0; |
nkeynes@16 | 52 | dreamcast_module_t modules[MAX_MODULES]; |
nkeynes@15 | 53 | |
nkeynes@16 | 54 | /** |
nkeynes@35 | 55 | * The unknown module is used for logging files without an actual module |
nkeynes@35 | 56 | * declaration |
nkeynes@35 | 57 | */ |
nkeynes@35 | 58 | struct dreamcast_module unknown_module = { "****", NULL, NULL, NULL, NULL, |
nkeynes@736 | 59 | NULL, NULL, NULL }; |
nkeynes@35 | 60 | |
nkeynes@35 | 61 | /** |
nkeynes@16 | 62 | * This function is responsible for defining how all the pieces of the |
nkeynes@26 | 63 | * dreamcast actually fit together. |
nkeynes@16 | 64 | * |
nkeynes@16 | 65 | * Note currently the locations of the various MMIO pages are hard coded in |
nkeynes@16 | 66 | * the MMIO definitions - they should probably be moved here. |
nkeynes@16 | 67 | */ |
nkeynes@15 | 68 | void dreamcast_configure( ) |
nkeynes@15 | 69 | { |
nkeynes@825 | 70 | const char *bios_path = lxdream_get_config_value(CONFIG_BIOS_PATH); |
nkeynes@825 | 71 | const char *flash_path = lxdream_get_config_value(CONFIG_FLASH_PATH); |
nkeynes@825 | 72 | |
nkeynes@265 | 73 | dreamcast_register_module( &eventq_module ); |
nkeynes@16 | 74 | /* Register the memory framework */ |
nkeynes@15 | 75 | dreamcast_register_module( &mem_module ); |
nkeynes@16 | 76 | |
nkeynes@16 | 77 | /* Setup standard memory map */ |
nkeynes@146 | 78 | mem_create_repeating_ram_region( 0x0C000000, 16 MB, MEM_REGION_MAIN, 0x01000000, 0x0F000000 ); |
nkeynes@16 | 79 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO ); |
nkeynes@16 | 80 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH ); |
nkeynes@16 | 81 | mem_create_ram_region( 0x05000000, 8 MB, MEM_REGION_VIDEO ); |
nkeynes@825 | 82 | dreamcast_has_bios = mem_load_rom( bios_path, 0x00000000, 0x00200000, 0x89f2b1a1, MEM_REGION_BIOS ); |
nkeynes@146 | 83 | mem_create_ram_region( 0x00200000, 0x00020000, MEM_REGION_FLASH ); |
nkeynes@825 | 84 | if( flash_path != NULL && flash_path[0] != '\0' ) { |
nkeynes@825 | 85 | mem_load_block( flash_path, 0x00200000, 0x00020000 ); |
nkeynes@825 | 86 | } |
nkeynes@742 | 87 | dreamcast_has_flash = TRUE; |
nkeynes@16 | 88 | |
nkeynes@16 | 89 | /* Load in the rest of the core modules */ |
nkeynes@15 | 90 | dreamcast_register_module( &sh4_module ); |
nkeynes@15 | 91 | dreamcast_register_module( &asic_module ); |
nkeynes@15 | 92 | dreamcast_register_module( &pvr2_module ); |
nkeynes@15 | 93 | dreamcast_register_module( &aica_module ); |
nkeynes@15 | 94 | dreamcast_register_module( &maple_module ); |
nkeynes@15 | 95 | dreamcast_register_module( &ide_module ); |
nkeynes@15 | 96 | } |
nkeynes@15 | 97 | |
nkeynes@461 | 98 | void dreamcast_config_changed(void) |
nkeynes@461 | 99 | { |
nkeynes@825 | 100 | const char *bios_path = lxdream_get_config_value(CONFIG_BIOS_PATH); |
nkeynes@825 | 101 | const char *flash_path = lxdream_get_config_value(CONFIG_FLASH_PATH); |
nkeynes@825 | 102 | dreamcast_has_bios = mem_load_rom( bios_path, 0x00000000, 0x00200000, 0x89f2b1a1, MEM_REGION_BIOS ); |
nkeynes@825 | 103 | if( flash_path != NULL && flash_path[0] != '\0' ) { |
nkeynes@825 | 104 | mem_load_block( flash_path, 0x00200000, 0x00020000 ); |
nkeynes@825 | 105 | } |
nkeynes@461 | 106 | } |
nkeynes@461 | 107 | |
nkeynes@277 | 108 | void dreamcast_save_flash() |
nkeynes@277 | 109 | { |
nkeynes@742 | 110 | if( dreamcast_has_flash ) { |
nkeynes@742 | 111 | const char *file = lxdream_get_config_value(CONFIG_FLASH_PATH); |
nkeynes@742 | 112 | mem_save_block( file, 0x00200000, 0x00020000 ); |
nkeynes@742 | 113 | } |
nkeynes@277 | 114 | } |
nkeynes@277 | 115 | |
nkeynes@71 | 116 | /** |
nkeynes@71 | 117 | * Constructs a system configuration for the AICA in standalone mode, |
nkeynes@71 | 118 | * ie sound chip only. |
nkeynes@71 | 119 | */ |
nkeynes@71 | 120 | void dreamcast_configure_aica_only( ) |
nkeynes@71 | 121 | { |
nkeynes@71 | 122 | dreamcast_register_module( &mem_module ); |
nkeynes@71 | 123 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO ); |
nkeynes@71 | 124 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH ); |
nkeynes@71 | 125 | dreamcast_register_module( &aica_module ); |
nkeynes@89 | 126 | aica_enable(); |
nkeynes@71 | 127 | dreamcast_state = STATE_STOPPED; |
nkeynes@71 | 128 | } |
nkeynes@71 | 129 | |
nkeynes@15 | 130 | void dreamcast_register_module( dreamcast_module_t module ) |
nkeynes@15 | 131 | { |
nkeynes@15 | 132 | modules[num_modules++] = module; |
nkeynes@16 | 133 | if( module->init != NULL ) |
nkeynes@736 | 134 | module->init(); |
nkeynes@15 | 135 | } |
nkeynes@15 | 136 | |
nkeynes@689 | 137 | void dreamcast_set_run_time( uint32_t secs, uint32_t nanosecs ) |
nkeynes@689 | 138 | { |
nkeynes@689 | 139 | run_time_nanosecs = (((uint64_t)secs) * 1000000000) + nanosecs; |
nkeynes@689 | 140 | } |
nkeynes@689 | 141 | |
nkeynes@689 | 142 | void dreamcast_set_exit_on_stop( gboolean flag ) |
nkeynes@689 | 143 | { |
nkeynes@689 | 144 | dreamcast_exit_on_stop = flag; |
nkeynes@689 | 145 | } |
nkeynes@15 | 146 | |
nkeynes@2 | 147 | void dreamcast_init( void ) |
nkeynes@2 | 148 | { |
nkeynes@15 | 149 | dreamcast_configure(); |
nkeynes@23 | 150 | dreamcast_state = STATE_STOPPED; |
nkeynes@2 | 151 | } |
nkeynes@2 | 152 | |
nkeynes@2 | 153 | void dreamcast_reset( void ) |
nkeynes@2 | 154 | { |
nkeynes@766 | 155 | sh4_core_exit(CORE_EXIT_SYSRESET); |
nkeynes@15 | 156 | int i; |
nkeynes@15 | 157 | for( i=0; i<num_modules; i++ ) { |
nkeynes@736 | 158 | if( modules[i]->reset != NULL ) |
nkeynes@736 | 159 | modules[i]->reset(); |
nkeynes@15 | 160 | } |
nkeynes@2 | 161 | } |
nkeynes@2 | 162 | |
nkeynes@23 | 163 | void dreamcast_run( void ) |
nkeynes@15 | 164 | { |
nkeynes@15 | 165 | int i; |
nkeynes@736 | 166 | |
nkeynes@23 | 167 | if( dreamcast_state != STATE_RUNNING ) { |
nkeynes@689 | 168 | for( i=0; i<num_modules; i++ ) { |
nkeynes@689 | 169 | if( modules[i]->start != NULL ) |
nkeynes@689 | 170 | modules[i]->start(); |
nkeynes@689 | 171 | } |
nkeynes@15 | 172 | } |
nkeynes@839 | 173 | |
nkeynes@839 | 174 | if( maple_should_grab() ) { |
nkeynes@839 | 175 | gui_set_use_grab(TRUE); |
nkeynes@839 | 176 | } |
nkeynes@736 | 177 | |
nkeynes@23 | 178 | dreamcast_state = STATE_RUNNING; |
nkeynes@736 | 179 | |
nkeynes@689 | 180 | if( run_time_nanosecs != 0 ) { |
nkeynes@689 | 181 | while( dreamcast_state == STATE_RUNNING ) { |
nkeynes@689 | 182 | uint32_t time_to_run = timeslice_length; |
nkeynes@689 | 183 | if( run_time_nanosecs < time_to_run ) { |
nkeynes@689 | 184 | time_to_run = (uint32_t)run_time_nanosecs; |
nkeynes@689 | 185 | } |
nkeynes@736 | 186 | |
nkeynes@689 | 187 | for( i=0; i<num_modules; i++ ) { |
nkeynes@689 | 188 | if( modules[i]->run_time_slice != NULL ) |
nkeynes@689 | 189 | time_to_run = modules[i]->run_time_slice( time_to_run ); |
nkeynes@689 | 190 | } |
nkeynes@736 | 191 | |
nkeynes@689 | 192 | if( run_time_nanosecs > time_to_run ) { |
nkeynes@689 | 193 | run_time_nanosecs -= time_to_run; |
nkeynes@689 | 194 | } else { |
nkeynes@689 | 195 | run_time_nanosecs = 0; // Finished |
nkeynes@689 | 196 | break; |
nkeynes@689 | 197 | } |
nkeynes@689 | 198 | } |
nkeynes@689 | 199 | } else { |
nkeynes@689 | 200 | while( dreamcast_state == STATE_RUNNING ) { |
nkeynes@689 | 201 | int time_to_run = timeslice_length; |
nkeynes@689 | 202 | for( i=0; i<num_modules; i++ ) { |
nkeynes@689 | 203 | if( modules[i]->run_time_slice != NULL ) |
nkeynes@689 | 204 | time_to_run = modules[i]->run_time_slice( time_to_run ); |
nkeynes@689 | 205 | } |
nkeynes@23 | 206 | |
nkeynes@689 | 207 | } |
nkeynes@23 | 208 | } |
nkeynes@23 | 209 | |
nkeynes@839 | 210 | gui_set_use_grab(FALSE); |
nkeynes@839 | 211 | |
nkeynes@15 | 212 | for( i=0; i<num_modules; i++ ) { |
nkeynes@689 | 213 | if( modules[i]->stop != NULL ) |
nkeynes@689 | 214 | modules[i]->stop(); |
nkeynes@15 | 215 | } |
nkeynes@23 | 216 | dreamcast_state = STATE_STOPPED; |
nkeynes@736 | 217 | |
nkeynes@689 | 218 | if( dreamcast_exit_on_stop ) { |
nkeynes@689 | 219 | dreamcast_shutdown(); |
nkeynes@689 | 220 | exit(0); |
nkeynes@372 | 221 | } |
nkeynes@372 | 222 | } |
nkeynes@372 | 223 | |
nkeynes@23 | 224 | void dreamcast_stop( void ) |
nkeynes@23 | 225 | { |
nkeynes@740 | 226 | sh4_core_exit(CORE_EXIT_HALT); // returns only if not inside SH4 core |
nkeynes@23 | 227 | if( dreamcast_state == STATE_RUNNING ) |
nkeynes@736 | 228 | dreamcast_state = STATE_STOPPING; |
nkeynes@23 | 229 | } |
nkeynes@17 | 230 | |
nkeynes@277 | 231 | void dreamcast_shutdown() |
nkeynes@277 | 232 | { |
nkeynes@727 | 233 | // Don't do a dreamcast_stop - if we're calling this out of SH4 code, |
nkeynes@727 | 234 | // it's a shutdown-and-quit event |
nkeynes@727 | 235 | if( dreamcast_state == STATE_RUNNING ) |
nkeynes@727 | 236 | dreamcast_state = STATE_STOPPING; |
nkeynes@277 | 237 | dreamcast_save_flash(); |
nkeynes@671 | 238 | #ifdef ENABLE_SH4STATS |
nkeynes@671 | 239 | sh4_stats_print(stdout); |
nkeynes@671 | 240 | #endif |
nkeynes@277 | 241 | } |
nkeynes@277 | 242 | |
nkeynes@543 | 243 | void dreamcast_program_loaded( const gchar *name, sh4addr_t entry_point ) |
nkeynes@543 | 244 | { |
nkeynes@543 | 245 | if( dreamcast_program_name != NULL ) { |
nkeynes@543 | 246 | g_free(dreamcast_program_name); |
nkeynes@543 | 247 | } |
nkeynes@543 | 248 | dreamcast_program_name = g_strdup(name); |
nkeynes@543 | 249 | dreamcast_entry_point = entry_point; |
nkeynes@543 | 250 | sh4_set_pc(entry_point); |
nkeynes@586 | 251 | bios_install(); |
nkeynes@543 | 252 | dcload_install(); |
nkeynes@543 | 253 | gui_update_state(); |
nkeynes@543 | 254 | } |
nkeynes@543 | 255 | |
nkeynes@26 | 256 | gboolean dreamcast_is_running( void ) |
nkeynes@26 | 257 | { |
nkeynes@26 | 258 | return dreamcast_state == STATE_RUNNING; |
nkeynes@26 | 259 | } |
nkeynes@26 | 260 | |
nkeynes@543 | 261 | gboolean dreamcast_can_run(void) |
nkeynes@543 | 262 | { |
nkeynes@543 | 263 | return dreamcast_state != STATE_UNINIT && |
nkeynes@736 | 264 | (dreamcast_has_bios || dreamcast_program_name != NULL); |
nkeynes@543 | 265 | } |
nkeynes@543 | 266 | |
nkeynes@26 | 267 | /********************************* Save States *****************************/ |
nkeynes@26 | 268 | |
nkeynes@26 | 269 | struct save_state_header { |
nkeynes@26 | 270 | char magic[16]; |
nkeynes@26 | 271 | uint32_t version; |
nkeynes@26 | 272 | uint32_t module_count; |
nkeynes@26 | 273 | }; |
nkeynes@26 | 274 | |
nkeynes@477 | 275 | struct chunk_header { |
nkeynes@477 | 276 | char marker[4]; /* Always BLCK */ |
nkeynes@477 | 277 | char name[8]; /* Block (module) name */ |
nkeynes@477 | 278 | uint32_t block_length; |
nkeynes@477 | 279 | }; |
nkeynes@477 | 280 | |
nkeynes@477 | 281 | /** |
nkeynes@477 | 282 | * Check the save state header to ensure that it is a valid, supported |
nkeynes@477 | 283 | * file. |
nkeynes@477 | 284 | * @return the number of blocks following, or 0 if the file is invalid. |
nkeynes@477 | 285 | */ |
nkeynes@477 | 286 | int dreamcast_read_save_state_header( FILE *f ) |
nkeynes@477 | 287 | { |
nkeynes@477 | 288 | struct save_state_header header; |
nkeynes@477 | 289 | if( fread( &header, sizeof(header), 1, f ) != 1 ) { |
nkeynes@736 | 290 | return 0; |
nkeynes@477 | 291 | } |
nkeynes@477 | 292 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) { |
nkeynes@736 | 293 | ERROR( "Not a %s save state file", APP_NAME ); |
nkeynes@736 | 294 | return 0; |
nkeynes@477 | 295 | } |
nkeynes@477 | 296 | if( header.version != DREAMCAST_SAVE_VERSION ) { |
nkeynes@736 | 297 | ERROR( "%s save state version not supported", APP_NAME ); |
nkeynes@736 | 298 | return 0; |
nkeynes@477 | 299 | } |
nkeynes@477 | 300 | if( header.module_count > MAX_MODULES ) { |
nkeynes@736 | 301 | ERROR( "%s save state is corrupted (bad module count)", APP_NAME ); |
nkeynes@736 | 302 | return 0; |
nkeynes@477 | 303 | } |
nkeynes@477 | 304 | return header.module_count; |
nkeynes@477 | 305 | } |
nkeynes@477 | 306 | |
nkeynes@477 | 307 | int dreamcast_write_chunk_header( const gchar *name, uint32_t length, FILE *f ) |
nkeynes@477 | 308 | { |
nkeynes@477 | 309 | struct chunk_header head; |
nkeynes@477 | 310 | |
nkeynes@477 | 311 | memcpy( head.marker, "BLCK", 4 ); |
nkeynes@477 | 312 | memset( head.name, 0, 8 ); |
nkeynes@477 | 313 | memcpy( head.name, name, strlen(name) ); |
nkeynes@477 | 314 | head.block_length = length; |
nkeynes@477 | 315 | return fwrite( &head, sizeof(head), 1, f ); |
nkeynes@477 | 316 | } |
nkeynes@477 | 317 | |
nkeynes@477 | 318 | |
nkeynes@477 | 319 | frame_buffer_t dreamcast_load_preview( const gchar *filename ) |
nkeynes@477 | 320 | { |
nkeynes@477 | 321 | int i; |
nkeynes@477 | 322 | FILE *f = fopen( filename, "r" ); |
nkeynes@477 | 323 | if( f == NULL ) return NULL; |
nkeynes@736 | 324 | |
nkeynes@477 | 325 | int module_count = dreamcast_read_save_state_header(f); |
nkeynes@477 | 326 | if( module_count <= 0 ) { |
nkeynes@736 | 327 | fclose(f); |
nkeynes@736 | 328 | return NULL; |
nkeynes@477 | 329 | } |
nkeynes@477 | 330 | for( i=0; i<module_count; i++ ) { |
nkeynes@736 | 331 | struct chunk_header head; |
nkeynes@736 | 332 | if( fread( &head, sizeof(head), 1, f ) != 1 ) { |
nkeynes@736 | 333 | fclose(f); |
nkeynes@736 | 334 | return NULL; |
nkeynes@736 | 335 | } |
nkeynes@736 | 336 | if( memcmp("BLCK", head.marker, 4) != 0 ) { |
nkeynes@736 | 337 | fclose(f); |
nkeynes@736 | 338 | return NULL; |
nkeynes@736 | 339 | } |
nkeynes@477 | 340 | |
nkeynes@736 | 341 | if( strcmp("PVR2", head.name) == 0 ) { |
nkeynes@736 | 342 | uint32_t buf_count; |
nkeynes@736 | 343 | int has_front; |
nkeynes@736 | 344 | fread( &buf_count, sizeof(buf_count), 1, f ); |
nkeynes@736 | 345 | fread( &has_front, sizeof(has_front), 1, f ); |
nkeynes@736 | 346 | if( buf_count != 0 && has_front ) { |
nkeynes@736 | 347 | frame_buffer_t result = read_png_from_stream(f); |
nkeynes@736 | 348 | fclose(f); |
nkeynes@736 | 349 | return result; |
nkeynes@736 | 350 | } |
nkeynes@736 | 351 | break; |
nkeynes@736 | 352 | } else { |
nkeynes@736 | 353 | fseek( f, head.block_length, SEEK_CUR ); |
nkeynes@736 | 354 | } |
nkeynes@477 | 355 | } |
nkeynes@477 | 356 | return NULL; |
nkeynes@477 | 357 | } |
nkeynes@477 | 358 | |
nkeynes@18 | 359 | int dreamcast_load_state( const gchar *filename ) |
nkeynes@15 | 360 | { |
nkeynes@17 | 361 | int i,j; |
nkeynes@477 | 362 | int module_count; |
nkeynes@17 | 363 | int have_read[MAX_MODULES]; |
nkeynes@18 | 364 | |
nkeynes@477 | 365 | FILE *f = fopen( filename, "r" ); |
nkeynes@18 | 366 | if( f == NULL ) return errno; |
nkeynes@15 | 367 | |
nkeynes@477 | 368 | module_count = dreamcast_read_save_state_header(f); |
nkeynes@477 | 369 | if( module_count <= 0 ) { |
nkeynes@736 | 370 | fclose(f); |
nkeynes@736 | 371 | return 1; |
nkeynes@15 | 372 | } |
nkeynes@477 | 373 | |
nkeynes@17 | 374 | for( i=0; i<MAX_MODULES; i++ ) { |
nkeynes@736 | 375 | have_read[i] = 0; |
nkeynes@15 | 376 | } |
nkeynes@15 | 377 | |
nkeynes@477 | 378 | for( i=0; i<module_count; i++ ) { |
nkeynes@736 | 379 | struct chunk_header chunk; |
nkeynes@736 | 380 | fread( &chunk, sizeof(chunk), 1, f ); |
nkeynes@736 | 381 | if( strncmp(chunk.marker, "BLCK", 4) != 0 ) { |
nkeynes@736 | 382 | ERROR( "%s save state is corrupted (missing block header %d)", APP_NAME, i ); |
nkeynes@736 | 383 | fclose(f); |
nkeynes@736 | 384 | return 2; |
nkeynes@736 | 385 | } |
nkeynes@736 | 386 | |
nkeynes@736 | 387 | /* Find the matching module by name */ |
nkeynes@736 | 388 | for( j=0; j<num_modules; j++ ) { |
nkeynes@736 | 389 | if( strcmp(modules[j]->name,chunk.name) == 0 ) { |
nkeynes@736 | 390 | have_read[j] = 1; |
nkeynes@736 | 391 | if( modules[j]->load == NULL ) { |
nkeynes@736 | 392 | ERROR( "%s save state is corrupted (no loader for %s)", APP_NAME, modules[j]->name ); |
nkeynes@736 | 393 | fclose(f); |
nkeynes@736 | 394 | return 2; |
nkeynes@736 | 395 | } else if( modules[j]->load(f) != 0 ) { |
nkeynes@736 | 396 | ERROR( "%s save state is corrupted (%s failed)", APP_NAME, modules[j]->name ); |
nkeynes@736 | 397 | fclose(f); |
nkeynes@736 | 398 | return 2; |
nkeynes@736 | 399 | } |
nkeynes@736 | 400 | break; |
nkeynes@736 | 401 | } |
nkeynes@736 | 402 | } |
nkeynes@736 | 403 | if( j == num_modules ) { |
nkeynes@736 | 404 | fclose(f); |
nkeynes@736 | 405 | ERROR( "%s save state contains unrecognized section", APP_NAME ); |
nkeynes@736 | 406 | return 2; |
nkeynes@736 | 407 | } |
nkeynes@17 | 408 | } |
nkeynes@736 | 409 | |
nkeynes@17 | 410 | /* Any modules that we didn't load - reset to the default state. |
nkeynes@17 | 411 | * (ie it's not an error to skip a module if you don't actually |
nkeynes@17 | 412 | * care about its state). |
nkeynes@17 | 413 | */ |
nkeynes@17 | 414 | for( j=0; j<num_modules; j++ ) { |
nkeynes@736 | 415 | if( have_read[j] == 0 && modules[j]->reset != NULL ) { |
nkeynes@736 | 416 | modules[j]->reset(); |
nkeynes@736 | 417 | } |
nkeynes@15 | 418 | } |
nkeynes@18 | 419 | fclose(f); |
nkeynes@18 | 420 | INFO( "Save state read from %s", filename ); |
nkeynes@422 | 421 | return 0; |
nkeynes@15 | 422 | } |
nkeynes@15 | 423 | |
nkeynes@18 | 424 | int dreamcast_save_state( const gchar *filename ) |
nkeynes@15 | 425 | { |
nkeynes@15 | 426 | int i; |
nkeynes@18 | 427 | FILE *f; |
nkeynes@15 | 428 | struct save_state_header header; |
nkeynes@736 | 429 | |
nkeynes@18 | 430 | f = fopen( filename, "w" ); |
nkeynes@18 | 431 | if( f == NULL ) |
nkeynes@736 | 432 | return errno; |
nkeynes@15 | 433 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC ); |
nkeynes@15 | 434 | header.version = DREAMCAST_SAVE_VERSION; |
nkeynes@18 | 435 | header.module_count = 0; |
nkeynes@18 | 436 | |
nkeynes@18 | 437 | for( i=0; i<num_modules; i++ ) { |
nkeynes@736 | 438 | if( modules[i]->save != NULL ) |
nkeynes@736 | 439 | header.module_count++; |
nkeynes@18 | 440 | } |
nkeynes@15 | 441 | fwrite( &header, sizeof(header), 1, f ); |
nkeynes@15 | 442 | for( i=0; i<num_modules; i++ ) { |
nkeynes@736 | 443 | if( modules[i]->save != NULL ) { |
nkeynes@736 | 444 | uint32_t blocklen, posn1, posn2; |
nkeynes@736 | 445 | dreamcast_write_chunk_header( modules[i]->name, 0, f ); |
nkeynes@736 | 446 | posn1 = ftell(f); |
nkeynes@736 | 447 | modules[i]->save(f); |
nkeynes@736 | 448 | posn2 = ftell(f); |
nkeynes@736 | 449 | blocklen = posn2 - posn1; |
nkeynes@736 | 450 | fseek( f, posn1-4, SEEK_SET ); |
nkeynes@736 | 451 | fwrite( &blocklen, sizeof(blocklen), 1, f ); |
nkeynes@736 | 452 | fseek( f, posn2, SEEK_SET ); |
nkeynes@736 | 453 | } |
nkeynes@15 | 454 | } |
nkeynes@18 | 455 | fclose( f ); |
nkeynes@18 | 456 | INFO( "Save state written to %s", filename ); |
nkeynes@422 | 457 | return 0; |
nkeynes@15 | 458 | } |
nkeynes@15 | 459 |
.