Function EqualIntegrityFiles

src/android/android_main.cpp:75–111

The first line of each integrity file contains the combined hash for all files, if the hashes match then we assume that the unpacked data folder is up-to-date.

// The first line of each integrity file contains the combined hash for all files,
// if the hashes match then we assume that the unpacked data folder is up-to-date.
static bool EqualIntegrityFiles(const char *pAssetFilename, const char *pStorageFilename)
{
	IOHANDLE StorageFile = io_open(pStorageFilename, IOFLAG_READ);
	if(!StorageFile)
	{
		return false;
	}

	char aStorageMainSha256[SHA256_MAXSTRSIZE];
	const size_t StorageReadLength = io_read(StorageFile, aStorageMainSha256, sizeof(aStorageMainSha256) - 1);
	io_close(StorageFile);
	if(StorageReadLength != sizeof(aStorageMainSha256) - 1)
	{
		return false;
	}
	aStorageMainSha256[sizeof(aStorageMainSha256) - 1] = '\0';

	char aAssetFilename[IO_MAX_PATH_LENGTH] = "asset_integrity_files/";
	str_append(aAssetFilename, pAssetFilename);

	SDL_RWops *pAssetFile = SDL_RWFromFile(aAssetFilename, "rb");
	if(!pAssetFile)
	{
		return false;
	}

	char aAssetMainSha256[SHA256_MAXSTRSIZE];
	const size_t AssetReadLength = SDL_RWread(pAssetFile, aAssetMainSha256, 1, sizeof(aAssetMainSha256) - 1);
	SDL_RWclose(pAssetFile);
	if(AssetReadLength != sizeof(aAssetMainSha256) - 1)
	{
		return false;
	}
	aAssetMainSha256[sizeof(aAssetMainSha256) - 1] = '\0';

	return str_comp(aStorageMainSha256, aAssetMainSha256) == 0;
}

class CIntegrityFileLine
{