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Move rom header function to more appropriate location

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This commit is contained in:
Robin Jones 2023-06-08 16:39:02 +01:00
parent 6809203777
commit 7942c5209b
3 changed files with 43 additions and 41 deletions
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43
src/menu/menu_main.c
View File

@ -22,41 +22,6 @@ static int items_in_dir = 1;
static FILINFO current_fileinfo;
rom_header_t file_read_rom_header(char *path) {
FILE *fp = fopen(path, "rb");
printf("loading path: %s\n", path);
if (!fp) {
printf("Error loading rom file header\n");
}
rom_header_t *rom_header = malloc(sizeof(rom_header_t));
fseek(fp, 0x10, SEEK_SET);
fread(&(rom_header->checksum), sizeof(uint64_t), 1, fp);
fseek(fp, 0x20, SEEK_SET);
fread(&(rom_header->title), sizeof(rom_header->title), 1, fp);
rom_header->title[20] = '\0';
fseek(fp, 0x3b, SEEK_SET);
fread(&(rom_header->metadata.media_type), sizeof(rom_header->metadata.media_type), 1, fp);
//fseek(fp, 0x3c, SEEK_SET); // Consecutive read (no need to seek).
fread(&(rom_header->metadata.unique_identifier), sizeof(rom_header->metadata.unique_identifier), 1, fp);
//fseek(fp, 0x3e, SEEK_SET); // Consecutive read (no need to seek).
fread(&(rom_header->metadata.destination_market), sizeof(rom_header->metadata.destination_market), 1, fp);
//fseek(fp, 0x3f, SEEK_SET); // Consecutive read (no need to seek).
fread(&(rom_header->version), sizeof(rom_header->version), 1, fp);
fclose(fp);
printf("ROM checksum: %llu\n", rom_header->checksum);
printf("ROM title: %s\n", rom_header->title);
printf("ROM media type: %c\n", rom_header->metadata.media_type);
printf("ROM unique id: %.2s\n", (char*)&(rom_header->metadata.unique_identifier));
printf("ROM dest market: %c\n", rom_header->metadata.destination_market);
printf("ROM version: %hhu\n", rom_header->version);
return *rom_header;
}
// FIXME: use newlib rather than fatfs to do this!
FRESULT scan_file_path (char *path) {
@ -196,6 +161,14 @@ void menu_main_init (settings_t *settings) {
char tmp_buffer[280];
sprintf(tmp_buffer, "sd:/%s", current_fileinfo.fname);
rom_header_t temp_header = file_read_rom_header(tmp_buffer);
printf("ROM checksum: %llu\n", temp_header.checksum);
printf("ROM title: %s\n", temp_header.title);
printf("ROM media type: %c\n", temp_header.metadata.media_type);
printf("ROM unique id: %.2s\n", (char*)&(temp_header.metadata.unique_identifier));
printf("ROM dest market: %c\n", temp_header.metadata.destination_market);
printf("ROM version: %hhu\n", temp_header.version);
printf("uid as int: %d\n", temp_header.metadata.unique_identifier);
uint8_t save_type = rom_db_match_save_type(temp_header);

39
src/menu/rom_database.c
View File

@ -1,5 +1,7 @@
#include "rom_database.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
uint8_t extract_homebrew_setting(uint8_t setting, uint8_t bit_position) {
return (setting & (1 << bit_position)) ? 1 : 0;
@ -26,6 +28,33 @@ uint8_t extract_homebrew_save_type(uint8_t save_type) {
}
}
rom_header_t file_read_rom_header(char *path) {
FILE *fp = fopen(path, "rb");
printf("loading path: %s\n", path);
if (!fp) {
printf("Error loading rom file header\n");
}
rom_header_t *rom_header = malloc(sizeof(rom_header_t));
fseek(fp, 0x10, SEEK_SET);
fread(&(rom_header->checksum), sizeof(uint64_t), 1, fp);
fseek(fp, 0x20, SEEK_SET);
fread(&(rom_header->title), sizeof(rom_header->title), 1, fp);
rom_header->title[20] = '\0';
fseek(fp, 0x3b, SEEK_SET);
fread(&(rom_header->metadata.media_type), sizeof(rom_header->metadata.media_type), 1, fp);
//fseek(fp, 0x3c, SEEK_SET); // Consecutive read (no need to seek).
fread(&(rom_header->metadata.unique_identifier), sizeof(rom_header->metadata.unique_identifier), 1, fp);
//fseek(fp, 0x3e, SEEK_SET); // Consecutive read (no need to seek).
fread(&(rom_header->metadata.destination_market), sizeof(rom_header->metadata.destination_market), 1, fp);
//fseek(fp, 0x3f, SEEK_SET); // Consecutive read (no need to seek).
fread(&(rom_header->version), sizeof(rom_header->version), 1, fp);
fclose(fp);
return *rom_header;
}
// TODO: make sure this can also handle an external input file.
@ -37,13 +66,13 @@ uint8_t rom_db_match_save_type(rom_header_t rom_header) {
// TODO: if appropriate this can be improved with other unused codes... e.g. | `AA` | `ZZ`
if (rom_header.metadata.unique_identifier == *(uint16_t *)"ED") {
// uint8_t info = rom_header.version & 0x0F;
// uint8_t rtc_enabled = extract_homebrew_setting(info, 0); // Bit 0
// uint8_t region_free_enabled = extract_homebrew_setting(info, 1); // Bit 1
// uint8_t low_nibble = rom_header.version & 0x0F;
// uint8_t rtc_enabled = extract_homebrew_setting(low_nibble, 0); // Bit 0
// uint8_t region_free_enabled = extract_homebrew_setting(low_nibble, 1); // Bit 1
uint8_t save_type = (rom_header.version >> 4) & 0x0F;
uint8_t high_nibble = (rom_header.version >> 4) & 0x0F;
return extract_homebrew_save_type(save_type);
return extract_homebrew_save_type(high_nibble);
}
// Second: Match the default entries for crc_high.

2
src/menu/rom_database.h
View File

@ -73,5 +73,5 @@ typedef struct {
uint8_t version;
} rom_header_t;
rom_header_t file_read_rom_header(char *path);
uint8_t rom_db_match_save_type(rom_header_t rom_header);