/* File: file_nes.c Copyright (C) 2013 James Holodnak This software is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_nes) #ifdef HAVE_CONFIG_H #include #endif #ifdef HAVE_STRING_H #include #endif #include #include "types.h" #include "filegen.h" #include "common.h" /*@ requires \valid(file_stat); */ static void register_header_check_nes(file_stat_t *file_stat); const file_hint_t file_hint_nes= { .extension="nes", .description="iNES/iNES 2.0 ROM image", .max_filesize=PHOTOREC_MAX_FILE_SIZE, .recover=1, .enable_by_default=0, .register_header_check=®ister_header_check_nes }; struct nes_header { char ident[4]; uint8_t prgsize; uint8_t chrsize; } __attribute__ ((gcc_struct, __packed__)); /*@ @ requires buffer_size >= sizeof(struct nes_header); @ requires \valid_read(buffer+(0..buffer_size-1)); @ requires valid_file_recovery(file_recovery); @ requires \valid(file_recovery_new); @ requires file_recovery_new->blocksize > 0; @ requires separation: \separated(&file_hint_nes, buffer+(..), file_recovery, file_recovery_new); @ assigns *file_recovery_new; @ ensures \result == 0 || \result == 1; @ ensures \result!=0 ==> valid_file_recovery(file_recovery_new); @*/ static int header_check_nes(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) { const struct nes_header *bm=(const struct nes_header *)buffer; const uint64_t size=16+bm->prgsize*0x4000+bm->chrsize*0x2000; reset_file_recovery(file_recovery_new); file_recovery_new->extension=file_hint_nes.extension; file_recovery_new->min_filesize=16; file_recovery_new->calculated_file_size=size; file_recovery_new->data_check=&data_check_size; file_recovery_new->file_check=&file_check_size; return 1; } static void register_header_check_nes(file_stat_t *file_stat) { static const unsigned char nes_header[4]= {'N','E','S',0x1A}; register_header_check(0, nes_header,sizeof(nes_header), &header_check_nes, file_stat); } #endif