Mercurial > repos > blastem
diff romdb.c @ 764:bb60259e8edf
Initial work on ROM database
author | Michael Pavone <pavone@retrodev.com> |
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date | Thu, 02 Jul 2015 19:19:06 -0700 |
parents | |
children | dc54387ee1cd |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/romdb.c Thu Jul 02 19:19:06 2015 -0700 @@ -0,0 +1,83 @@ +#include <stdlib.h> +#include <string.h> +#include "config.h" +#include "romdb.h" +#include "util.h" + +#define GAME_ID_OFF 0x183 +#define GAME_ID_LEN 8 +#define TITLE_START 0x150 +#define TITLE_END (TITLE_START+48) + +tern_node *load_rom_db() +{ + char *exe_dir = get_exe_dir(); + if (!exe_dir) { + fputs("Failed to find executable path\n", stderr); + exit(1); + } + char *path = alloc_concat(exe_dir, "/rom.db"); + tern_node *db = parse_config_file(path); + free(path); + if (!db) { + fputs("Failed to load ROM DB\n", stderr); + } + return db; +} + +char *get_header_name(uint8_t *rom) +{ + uint8_t *last = rom + TITLE_END - 1; + uint8_t *src = rom + TITLE_START; + + while (last > src && (*last <= 0x20 || *last >= 0x80)) + { + last--; + } + if (last == src) { + //TODO: Use other name field + return strdup("UNKNOWN"); + } else { + last++; + char *ret = malloc(last - (rom + TITLE_START) + 1); + uint8_t *dst; + for (dst = ret; src < last; src++) + { + if (*src >= 0x20 && *src < 0x80) { + *(dst++) = *src; + } + } + *dst = 0; + return ret; + } +} + +rom_info configure_rom_heuristics(uint8_t *rom) +{ + rom_info info; + info.name = get_header_name(rom); + +} + +rom_info configure_rom(tern_node *rom_db, void *vrom) +{ + uint8_t product_id[GAME_ID_LEN+1]; + uint8_t *rom = vrom; + product_id[GAME_ID_LEN] = 0; + for (int i = 0; i < GAME_ID_LEN; i++) + { + if (rom[GAME_ID_OFF + i] <= ' ') { + product_id[i] = 0; + break; + } + product_id[i] = rom[GAME_ID_OFF + i]; + + } + tern_node * entry = tern_find_prefix(rom_db, product_id); + if (!entry) { + return configure_rom_heuristics(rom); + } + rom_info info; + info.name = strdup(tern_find_ptr_default(entry, "name", "UNKNOWN")); + return info; +} \ No newline at end of file