From bb14fcd8c8d3b805bed6672c29b249c605c87056 Mon Sep 17 00:00:00 2001 From: Robin Jones Date: Wed, 18 Oct 2017 13:55:40 +0100 Subject: [PATCH] cheatfile done --- src/main.c | 342 ++++++++++++++++++++++++++++------------------------- 1 file changed, 178 insertions(+), 164 deletions(-) diff --git a/src/main.c b/src/main.c index 2ad2929..b1dab36 100644 --- a/src/main.c +++ b/src/main.c @@ -1724,7 +1724,9 @@ int saveTypeToSd(display_context_t disp, char *rom_name, int stype) if (result == FR_OK) { //for savegame - uint8_t cartsave_data[size] = {0}; + uint8_t cartsave_data[size]; //TODO: bring back old initialisation if this doesn't work + + TRACEF(disp, "cartsave_data=%p", &cartsave_data); @@ -2015,173 +2017,185 @@ int readCheatFile(char *filename, u32 *cheat_lists[2]) yaml_parser_initialize(&parser); - FatRecord rec_tmpf; - if (fatFindRecord(filename, &rec_tmpf, 0) != 0) + FRESULT result; + FIL file; + UINT bytesread; + result = f_open(&file, filename, FA_READ); + + if (result == FR_OK) + { + int fsize = f_size(&file); + + char *cheatfile = malloc(fsize); + if (!cheatfile) + { + return -2; // Out of memory + } + + /* + * Size of the cheat list can never be more than half the size of the YAML + * Minimum YAML example: + * A:-80001234 FFFF + * Which is exactly 16 bytes. + * The cheat list in this case fits into exactly 8 bytes (2 words): + * 0x80001234, 0x0000FFFF + */ + list1 = calloc(1, fsize + 2 * sizeof(u32)); // Plus 2 words to be safe + if (!list1) + { + // Free + free(cheatfile); + return -2; // Out of memory + } + list2 = &list1[fsize / sizeof(u32) / 2]; + cheat_lists[0] = list1; + cheat_lists[1] = list2; + + result = + f_read ( + &file, /* [IN] File object */ + &cheatfile, /* [OUT] Buffer to store read data */ + fsize, /* [IN] Number of bytes to read */ + &bytesread /* [OUT] Number of bytes read */ + ); + + result = f_close(&file); + + yaml_parser_set_input_string(&parser, cheatfile, strlen(cheatfile)); + + do + { + if (!yaml_parser_parse(&parser, &event)) + { + // Free + yaml_parser_delete(&parser); + yaml_event_delete(&event); + free(cheatfile); + free(cheat_lists[0]); + cheat_lists[0] = 0; + cheat_lists[1] = 0; + + return -3; // Parse error + } + + // Process YAML + switch (event.type) + { + case YAML_MAPPING_START_EVENT: + // Begin code block + is_code = 0; + break; + + case YAML_SEQUENCE_START_EVENT: + // Begin code lines + is_code = 1; + code_on = (event.data.sequence_start.tag ? !!strcasecmp(event.data.sequence_start.tag, "!off") : 1); + break; + + case YAML_SEQUENCE_END_EVENT: + // End code lines + is_code = 0; + code_on = 1; + repeater = 0; + break; + + case YAML_SCALAR_EVENT: + // Code line + if (!is_code || !code_on) + { + break; + } + + address = strtoul(event.data.scalar.value, &next, 16); + value = strtoul(next, NULL, 16); + + // Do not check code types within "repeater data" + if (repeater) + { + repeater--; + *list2++ = address; + *list2++ = value; + break; + } + + // Determine destination cheat_list for the code type + switch (address >> 24) + { + + // Uncessary code types + case 0x20: // Clear code list + case 0xCC: // Exception Handler Selection + case 0xDE: // Entry Point + break; + + // Boot-time cheats + case 0xEE: // Disable Expansion Pak + case 0xF0: // 8-bit Boot-Time Write + case 0xF1: // 16-bit Boot-Time Write + case 0xFF: // Cheat Engine Location + *list1++ = address; + *list1++ = value; + break; + + // In-game cheats + case 0x50: // Repeater/Patch + // Validate repeater count + if (address & 0x0000FF00) + { + repeater = 1; + *list2++ = address; + *list2++ = value; + } + break; + + // Everything else + default: + if (!address) + { + // TODO: Support special code types! :) + } + // Fall-through! + + case 0xD0: // 8-bit Equal-To Conditional + case 0xD1: // 16-bit Equal-To Conditional + case 0xD2: // 8-bit Not-Equal-To Conditional + case 0xD3: // 16-bit Not-Equal-To Conditional + // Validate 16-bit codes + if ((address & 0x01000001) == 0x01000001) + { + break; + } + + *list2++ = address; + *list2++ = value; + break; + } + break; + + case YAML_STREAM_END_EVENT: + // And we're outta here! + done = 1; + break; + + default: + break; + } + + yaml_event_delete(&event); + } while (!done); + + // Free + yaml_parser_delete(&parser); + free(cheatfile); + + return repeater; // Ok or repeater error + + } + else { return -1; //err file not found } - - u8 resp = 0; - resp = fatOpenFileByName(filename, 0); - - //filesize of the opend file -> is the readfile / 512 - int fsize = file.sec_available * 512; - char *cheatfile = malloc(fsize); - if (!cheatfile) - { - return -2; // Out of memory - } - - /* - * Size of the cheat list can never be more than half the size of the YAML - * Minimum YAML example: - * A:-80001234 FFFF - * Which is exactly 16 bytes. - * The cheat list in this case fits into exactly 8 bytes (2 words): - * 0x80001234, 0x0000FFFF - */ - list1 = calloc(1, fsize + 2 * sizeof(u32)); // Plus 2 words to be safe - if (!list1) - { - // Free - free(cheatfile); - return -2; // Out of memory - } - list2 = &list1[fsize / sizeof(u32) / 2]; - cheat_lists[0] = list1; - cheat_lists[1] = list2; - - resp = fatReadFile(cheatfile, fsize / 512); //1 cluster - - yaml_parser_set_input_string(&parser, cheatfile, strlen(cheatfile)); - - do - { - if (!yaml_parser_parse(&parser, &event)) - { - // Free - yaml_parser_delete(&parser); - yaml_event_delete(&event); - free(cheatfile); - free(cheat_lists[0]); - cheat_lists[0] = 0; - cheat_lists[1] = 0; - - return -3; // Parse error - } - - // Process YAML - switch (event.type) - { - case YAML_MAPPING_START_EVENT: - // Begin code block - is_code = 0; - break; - - case YAML_SEQUENCE_START_EVENT: - // Begin code lines - is_code = 1; - code_on = (event.data.sequence_start.tag ? !!strcasecmp(event.data.sequence_start.tag, "!off") : 1); - break; - - case YAML_SEQUENCE_END_EVENT: - // End code lines - is_code = 0; - code_on = 1; - repeater = 0; - break; - - case YAML_SCALAR_EVENT: - // Code line - if (!is_code || !code_on) - { - break; - } - - address = strtoul(event.data.scalar.value, &next, 16); - value = strtoul(next, NULL, 16); - - // Do not check code types within "repeater data" - if (repeater) - { - repeater--; - *list2++ = address; - *list2++ = value; - break; - } - - // Determine destination cheat_list for the code type - switch (address >> 24) - { - - // Uncessary code types - case 0x20: // Clear code list - case 0xCC: // Exception Handler Selection - case 0xDE: // Entry Point - break; - - // Boot-time cheats - case 0xEE: // Disable Expansion Pak - case 0xF0: // 8-bit Boot-Time Write - case 0xF1: // 16-bit Boot-Time Write - case 0xFF: // Cheat Engine Location - *list1++ = address; - *list1++ = value; - break; - - // In-game cheats - case 0x50: // Repeater/Patch - // Validate repeater count - if (address & 0x0000FF00) - { - repeater = 1; - *list2++ = address; - *list2++ = value; - } - break; - - // Everything else - default: - if (!address) - { - // TODO: Support special code types! :) - } - // Fall-through! - - case 0xD0: // 8-bit Equal-To Conditional - case 0xD1: // 16-bit Equal-To Conditional - case 0xD2: // 8-bit Not-Equal-To Conditional - case 0xD3: // 16-bit Not-Equal-To Conditional - // Validate 16-bit codes - if ((address & 0x01000001) == 0x01000001) - { - break; - } - - *list2++ = address; - *list2++ = value; - break; - } - break; - - case YAML_STREAM_END_EVENT: - // And we're outta here! - done = 1; - break; - - default: - break; - } - - yaml_event_delete(&event); - } while (!done); - - // Free - yaml_parser_delete(&parser); - free(cheatfile); - - return repeater; // Ok or repeater error } //TODO: UNUSED CODE, WHAT IS IS FOR? BattleTanx??? but where to insert it???