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Attempt towards IPS

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mostly commented out.
This commit is contained in:
Robin Jones 2024-08-08 16:47:46 +01:00
parent 1cfb7747f8
commit 01e2ec3133
1 changed files with 54 additions and 2 deletions
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56
src/menu/rom_patch_info.c
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@ -1,4 +1,5 @@
#include <libdragon.h>
#include <stdbool.h>
#include "utils/fs.h"
#include "rom_patch_info.h"
#include "rom_info.h"
@ -68,9 +69,60 @@ rom_patch_load_err_t apply_patch_type_ips(FILE *f)
{
// https://web.archive.org/web/20170624071240/http://www.smwiki.net:80/wiki/IPS_file_format
char header_magic[5];
fread(header_magic, 5, 1, f);
// FIXME: we are not yet implementing it, but should be the first one!
return PATCH_ERR_INVALID;
// Check the header is valid.
if (strcmp(header_magic, PATCH_IPS_MAGIC) != 0) {
return PATCH_ERR_INVALID;
}
// while (true) {
// uint8_t offset_bytes[3];
// fread(offset_bytes, 3, 1, f);
// uint32_t offset = (offset_bytes[0] << 16) | (offset_bytes[1] << 8) | offset_bytes[2];
// // Check for end-of-file marker.
// if (offset == 0x454F46) { // "EOF" in ASCII (big endian?)
// break;
// }
// uint16_t size;
// fread(&size, 2, 1, f);
// size = (size >> 8) | (size << 8); // Convert to big-endian
// if (size == 0) {
// // RLE record
// uint16_t rle_size;
// uint8_t rle_byte;
// fread(&rle_size, 2, 1, f);
// fread(&rle_byte, 1, 1, f);
// rle_size = (rle_size >> 8) | (rle_size << 8); // Convert to big-endian
// // Apply RLE patch
// for (int i = 0; i < rle_size; i++) {
// // Write rle_byte to the ROM at the given offset
// // (Assuming a function write_byte_to_rom exists)
// //write_byte_to_rom(offset + i, rle_byte);
// }
// } else {
// // Normal record
// uint8_t *data = malloc(size);
// fread(data, size, 1, f);
// // Apply patch
// for (int i = 0; i < size; i++) {
// // Write data[i] to the ROM at the given offset
// // (Assuming a function write_byte_to_rom exists)
// //write_byte_to_rom(offset + i, data[i]);
// }
// free(data);
// }
// }
// FIXME: we are not yet applying it!
return PATCH_OK;
}
rom_patch_load_err_t apply_patch_type_aps(FILE *f)