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annotate romdb.c @ 764:bb60259e8edf

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Initial work on ROM database
author Michael Pavone <pavone@retrodev.com>
date Thu, 02 Jul 2015 19:19:06 -0700
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children dc54387ee1cd
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764
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1 #include <stdlib.h>
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2 #include <string.h>
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3 #include "config.h"
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4 #include "romdb.h"
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5 #include "util.h"
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6
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7 #define GAME_ID_OFF 0x183
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8 #define GAME_ID_LEN 8
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9 #define TITLE_START 0x150
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10 #define TITLE_END (TITLE_START+48)
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11
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12 tern_node *load_rom_db()
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13 {
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14 char *exe_dir = get_exe_dir();
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15 if (!exe_dir) {
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16 fputs("Failed to find executable path\n", stderr);
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17 exit(1);
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18 }
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19 char *path = alloc_concat(exe_dir, "/rom.db");
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20 tern_node *db = parse_config_file(path);
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21 free(path);
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22 if (!db) {
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23 fputs("Failed to load ROM DB\n", stderr);
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24 }
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25 return db;
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26 }
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27
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28 char *get_header_name(uint8_t *rom)
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29 {
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30 uint8_t *last = rom + TITLE_END - 1;
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31 uint8_t *src = rom + TITLE_START;
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32
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33 while (last > src && (*last <= 0x20 || *last >= 0x80))
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34 {
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35 last--;
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36 }
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37 if (last == src) {
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38 //TODO: Use other name field
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39 return strdup("UNKNOWN");
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40 } else {
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41 last++;
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42 char *ret = malloc(last - (rom + TITLE_START) + 1);
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43 uint8_t *dst;
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44 for (dst = ret; src < last; src++)
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45 {
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46 if (*src >= 0x20 && *src < 0x80) {
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47 *(dst++) = *src;
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48 }
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49 }
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50 *dst = 0;
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51 return ret;
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52 }
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53 }
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54
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55 rom_info configure_rom_heuristics(uint8_t *rom)
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56 {
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57 rom_info info;
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58 info.name = get_header_name(rom);
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59
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60 }
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61
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62 rom_info configure_rom(tern_node *rom_db, void *vrom)
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63 {
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64 uint8_t product_id[GAME_ID_LEN+1];
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65 uint8_t *rom = vrom;
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66 product_id[GAME_ID_LEN] = 0;
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67 for (int i = 0; i < GAME_ID_LEN; i++)
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68 {
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69 if (rom[GAME_ID_OFF + i] <= ' ') {
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70 product_id[i] = 0;
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71 break;
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72 }
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73 product_id[i] = rom[GAME_ID_OFF + i];
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74
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75 }
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76 tern_node * entry = tern_find_prefix(rom_db, product_id);
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77 if (!entry) {
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78 return configure_rom_heuristics(rom);
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79 }
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80 rom_info info;
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81 info.name = strdup(tern_find_ptr_default(entry, "name", "UNKNOWN"));
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82 return info;
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83 }