/*
	Copyright 2022-2023 Gabriel Jensen.

	This file is part of agbsum.

	agbsum is free software: you can redistribute it
	and/or modify it under the terms of the GNU
	Affero General Public License as published by
	the Free Software Foundation, either version 3
	of the License, or (at your option) any later
	version.

	agbsum is distributed in the hope that it will
	be useful, but WITHOUT ANY WARRANTY; without
	even the implied warranty of MERCHANTABILITY
	or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU Affero General Public License for more
	details.

	You should have received a copy of the GNU
	Affero General Public License along with agbsum.
	If not, see <https://www.gnu.org/licenses/>.
*/

#include <agbsum.h>

#include <limits.h>
#include <stdint.h>
#include <stdio.h>

#if CHAR_BIT != 0x8
#error "agbsum only support 8-bit byte systems"
#endif

int main (int const argc, char const* const* const argv)
{
	struct agb_dat dat;
	agb_inidat (&dat);
	agb_chkpar (&dat, argc, argv);

	dat.img = agb_opn (dat.pth);

	char unsigned buf[agb_sumoff + 0x1];

	agb_red (buf, dat.img);

	{
		char unsigned const sum    = agb_getsum (buf);
		char unsigned const romsum = buf[agb_sumoff];

		if (romsum == sum || !dat.dopat) {
			// Don't patch the ROM if it's already okay or we're not allowed to.
			if (!dat.sil) {printf ("\"%s\": %hhX (%hhX in file)\n", dat.pth, sum, romsum);}
			agb_exi (agb_cnd_oky, dat.img);
		}

		agb_pat (dat.img, sum);

		if (!dat.sil) {printf ("\"%s\" @ %zX: %hhX => %hhX\n", dat.pth, agb_iptsrt + agb_sumoff, romsum, sum);} // If we aren't supposed to print anything then don't.
	}

	agb_exi (agb_cnd_oky, dat.img);
}