71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/*
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File: file_nes.c
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Copyright (C) 2013 James Holodnak <jamesholodnak@gmail.com>
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This software is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_nes)
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <stdio.h>
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#include "types.h"
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#include "filegen.h"
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#include "common.h"
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static void register_header_check_nes(file_stat_t *file_stat);
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const file_hint_t file_hint_nes= {
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.extension="nes",
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.description="iNES/iNES 2.0 ROM image",
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.max_filesize=PHOTOREC_MAX_FILE_SIZE,
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.recover=1,
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.enable_by_default=0,
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.register_header_check=®ister_header_check_nes
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};
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struct nes_header
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{
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char ident[4];
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uint8_t prgsize;
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uint8_t chrsize;
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} __attribute__ ((gcc_struct, __packed__));
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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)
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{
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const struct nes_header *bm=(const struct nes_header *)buffer;
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const uint64_t size=16+bm->prgsize*0x4000+bm->chrsize*0x2000;
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension=file_hint_nes.extension;
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file_recovery_new->min_filesize=16;
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file_recovery_new->calculated_file_size=(uint64_t)size;
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file_recovery_new->data_check=&data_check_size;
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file_recovery_new->file_check=&file_check_size;
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return 1;
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}
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static void register_header_check_nes(file_stat_t *file_stat)
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{
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static const unsigned char nes_header[4]= {'N','E','S',0x1A};
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register_header_check(0, nes_header,sizeof(nes_header), &header_check_nes, file_stat);
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}
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#endif
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