mirror of
https://github.com/dborth/fceugx.git
synced 2024-12-27 09:01:56 +01:00
570 lines
10 KiB
C
570 lines
10 KiB
C
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2002 Xodnizel
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*
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* This program 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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*
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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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <zlib.h>
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#include "unzip.h"
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#include "types.h"
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#include "file.h"
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#include "endian.h"
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#include "driver.h"
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#include "general.h"
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void ApplyIPS(FILE *ips, MEMWRAP *dest)
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{
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uint8 header[5];
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uint32 count=0;
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FCEU_printf(" Applying IPS...\n");
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if(fread(header,1,5,ips)!=5)
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{
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fclose(ips);
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return;
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}
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if(memcmp(header,"PATCH",5))
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{
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fclose(ips);
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return;
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}
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while(fread(header,1,3,ips)==3)
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{
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uint32 offset=(header[0]<<16)|(header[1]<<8)|header[2];
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uint16 size;
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if(!memcmp(header,"EOF",3))
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{
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FCEU_printf(" IPS EOF: Did %d patches\n\n",count);
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fclose(ips);
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return;
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}
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size=fgetc(ips)<<8;
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size|=fgetc(ips);
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if(!size) /* RLE */
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{
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uint8 *start;
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uint8 b;
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size=fgetc(ips)<<8;
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size|=fgetc(ips);
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//FCEU_printf(" Offset: %8d Size: %5d RLE\n",offset,size);
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if((offset+size)>dest->size)
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{
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uint8 *tmp;
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// Probably a little slow.
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tmp=(uint8 *)realloc(dest->data,offset+size);
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if(!tmp)
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{
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FCEU_printf(" Oops. IPS patch %d(type RLE) goes beyond end of file. Could not allocate memory.\n",count);
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fclose(ips);
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return;
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}
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dest->size=offset+size;
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dest->data=tmp;
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memset(dest->data+dest->size,0,offset+size-dest->size);
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}
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b=fgetc(ips);
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start=dest->data+offset;
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do
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{
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*start=b;
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start++;
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} while(--size);
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}
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else /* Normal patch */
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{
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//FCEU_printf(" Offset: %8d Size: %5d\n",offset,size);
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if((offset+size)>dest->size)
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{
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uint8 *tmp;
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// Probably a little slow.
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tmp=(uint8 *)realloc(dest->data,offset+size);
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if(!tmp)
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{
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FCEU_printf(" Oops. IPS patch %d(type normal) goes beyond end of file. Could not allocate memory.\n",count);
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fclose(ips);
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return;
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}
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dest->data=tmp;
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memset(dest->data+dest->size,0,offset+size-dest->size);
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}
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fread(dest->data+offset,1,size,ips);
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}
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count++;
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}
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fclose(ips);
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FCEU_printf(" Hard IPS end!\n");
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}
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static MEMWRAP *MakeMemWrap(void *tz, int type)
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{
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MEMWRAP *tmp;
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if(!(tmp=(MEMWRAP *)malloc(sizeof(MEMWRAP))))
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goto doret;
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tmp->location=0;
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if(type==0)
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{
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fseek((FILE *)tz,0,SEEK_END);
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tmp->size=ftell((FILE *)tz);
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fseek((FILE *)tz,0,SEEK_SET);
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if(!(tmp->data=(uint8*)malloc(tmp->size)))
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{
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free(tmp);
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tmp=0;
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goto doret;
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}
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fread(tmp->data,1,tmp->size,(FILE *)tz);
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}
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else if(type==1)
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{
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/* Bleck. The gzip file format has the size of the uncompressed data,
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but I can't get to the info with the zlib interface(?). */
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for(tmp->size=0; gzgetc(tz) != EOF; tmp->size++);
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gzseek(tz,0,SEEK_SET);
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if(!(tmp->data=(uint8 *)malloc(tmp->size)))
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{
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free(tmp);
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tmp=0;
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goto doret;
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}
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gzread(tz,tmp->data,tmp->size);
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}
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else if(type==2)
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{
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unz_file_info ufo;
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unzGetCurrentFileInfo(tz,&ufo,0,0,0,0,0,0);
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tmp->size=ufo.uncompressed_size;
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if(!(tmp->data=(uint8 *)malloc(ufo.uncompressed_size)))
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{
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free(tmp);
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tmp=0;
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goto doret;
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}
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unzReadCurrentFile(tz,tmp->data,ufo.uncompressed_size);
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}
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doret:
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if(type==0)
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{
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fclose((FILE *)tz);
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}
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else if(type==1)
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{
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gzclose(tz);
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}
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else if(type==2)
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{
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unzCloseCurrentFile(tz);
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unzClose(tz);
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}
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return tmp;
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}
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#ifndef __GNUC__
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#define strcasecmp strcmp
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#endif
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FCEUFILE * FCEU_fopen(const char *path, const char *ipsfn, char *mode, char *ext)
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{
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FILE *ipsfile=0;
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FCEUFILE *fceufp;
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void *t;
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if(strchr(mode,'r'))
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ipsfile=FCEUD_UTF8fopen(ipsfn,"rb");
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fceufp=(FCEUFILE *)malloc(sizeof(FCEUFILE));
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{
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unzFile tz;
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if((tz=unzOpen(path))) // If it's not a zip file, use regular file handlers.
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// Assuming file type by extension usually works,
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// but I don't like it. :)
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{
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if(unzGoToFirstFile(tz)==UNZ_OK)
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{
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for(;;)
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{
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char tempu[512]; // Longer filenames might be possible, but I don't
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// think people would name files that long in zip files...
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unzGetCurrentFileInfo(tz,0,tempu,512,0,0,0,0);
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tempu[511]=0;
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if(strlen(tempu)>=4)
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{
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char *za=tempu+strlen(tempu)-4;
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if(!ext)
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{
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if(!strcasecmp(za,".nes") || !strcasecmp(za,".fds") ||
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!strcasecmp(za,".nsf") || !strcasecmp(za,".unf") ||
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!strcasecmp(za,".nez"))
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break;
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}
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else if(!strcasecmp(za,ext))
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break;
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}
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if(strlen(tempu)>=5)
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{
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if(!strcasecmp(tempu+strlen(tempu)-5,".unif"))
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break;
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}
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if(unzGoToNextFile(tz)!=UNZ_OK)
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{
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if(unzGoToFirstFile(tz)!=UNZ_OK) goto zpfail;
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break;
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}
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}
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if(unzOpenCurrentFile(tz)!=UNZ_OK)
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goto zpfail;
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}
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else
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{
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zpfail:
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free(fceufp);
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unzClose(tz);
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return 0;
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}
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if(!(fceufp->fp=MakeMemWrap(tz,2)))
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{
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free(fceufp);
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return(0);
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}
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fceufp->type=2;
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if(ipsfile)
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ApplyIPS(ipsfile,(MEMWRAP *)fceufp->fp);
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return(fceufp);
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}
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}
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if((t=FCEUD_UTF8fopen(path,"rb")))
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{
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uint32 magic;
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magic=fgetc((FILE *)t);
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magic|=fgetc((FILE *)t)<<8;
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magic|=fgetc((FILE *)t)<<16;
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if(magic!=0x088b1f) /* Not gzip... */
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fclose((FILE *)t);
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else /* Probably gzip */
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{
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int fd = 0;
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/*** REMOVED GCV1.0
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fd = dup(fileno( (FILE *)t));
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REMOVED GCV1.0 ***/
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fclose(t);
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lseek(fd, 0, SEEK_SET);
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if((t=gzdopen(fd,mode)))
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{
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fceufp->type=1;
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fceufp->fp=t;
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if(ipsfile)
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{
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fceufp->fp=MakeMemWrap(t,1);
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gzclose(t);
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if(fceufp->fp)
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{
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free(fceufp);
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return(0);
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}
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fceufp->type=3;
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ApplyIPS(ipsfile,(MEMWRAP *)fceufp->fp);
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}
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return(fceufp);
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}
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close(fd);
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}
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}
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if((t=FCEUD_UTF8fopen(path,mode)))
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{
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fseek((FILE *)t,0,SEEK_SET);
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fceufp->type=0;
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fceufp->fp=t;
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if(ipsfile)
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{
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if(!(fceufp->fp=MakeMemWrap(t,0)))
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{
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free(fceufp);
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return(0);
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}
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fceufp->type=3;
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ApplyIPS(ipsfile,(MEMWRAP *)fceufp->fp);
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}
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return(fceufp);
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}
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free(fceufp);
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return 0;
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}
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int FCEU_fclose(FCEUFILE *fp)
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{
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if(fp->type==1)
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{
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gzclose(fp->fp);
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}
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else if(fp->type>=2)
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{
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free(((MEMWRAP*)(fp->fp))->data);
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free(fp->fp);
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}
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else
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{
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fclose((FILE *)fp->fp);
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}
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free(fp);
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return 1;
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}
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uint64 FCEU_fread(void *ptr, size_t size, size_t nmemb, FCEUFILE *fp)
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{
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if(fp->type==1)
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{
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return gzread(fp->fp,ptr,size*nmemb);
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}
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else if(fp->type>=2)
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{
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MEMWRAP *wz;
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uint32 total=size*nmemb;
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wz=(MEMWRAP*)fp->fp;
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if(wz->location>=wz->size) return 0;
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if((wz->location+total)>wz->size)
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{
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int ak=wz->size-wz->location;
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memcpy((uint8*)ptr,wz->data+wz->location,ak);
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wz->location=wz->size;
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return(ak/size);
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}
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else
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{
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memcpy((uint8*)ptr,wz->data+wz->location,total);
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wz->location+=total;
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return nmemb;
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}
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}
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else
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{
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return fread(ptr,size,nmemb,(FILE *)fp->fp);
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}
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}
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uint64 FCEU_fwrite(void *ptr, size_t size, size_t nmemb, FCEUFILE *fp)
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{
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if(fp->type==1)
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{
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return gzwrite(fp->fp,ptr,size*nmemb);
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}
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else if(fp->type>=2)
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{
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return 0;
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}
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else
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return fwrite(ptr,size,nmemb,(FILE *)fp->fp);
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}
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int FCEU_fseek(FCEUFILE *fp, long offset, int whence)
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{
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if(fp->type==1)
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{
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return( (gzseek(fp->fp,offset,whence)>0)?0:-1);
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}
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else if(fp->type>=2)
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{
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MEMWRAP *wz;
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wz=(MEMWRAP*)fp->fp;
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switch(whence)
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{
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case SEEK_SET:if(offset>=wz->size)
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return(-1);
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wz->location=offset;break;
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case SEEK_CUR:if(offset+wz->location>wz->size)
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return (-1);
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wz->location+=offset;
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break;
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}
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return 0;
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}
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else
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return fseek((FILE *)fp->fp,offset,whence);
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}
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uint64 FCEU_ftell(FCEUFILE *fp)
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{
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if(fp->type==1)
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{
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return gztell(fp->fp);
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}
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else if(fp->type>=2)
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{
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return (((MEMWRAP *)(fp->fp))->location);
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}
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else
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return ftell((FILE *)fp->fp);
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}
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void FCEU_rewind(FCEUFILE *fp)
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{
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if(fp->type==1)
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{
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gzrewind(fp->fp);
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}
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else if(fp->type>=2)
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{
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((MEMWRAP *)(fp->fp))->location=0;
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}
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else
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/* Rewind */
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fseek(fp->fp,0,SEEK_SET);
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}
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int FCEU_read16le(uint16 *val, FCEUFILE *fp)
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{
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uint8 t[2];
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if(fp->type>=1)
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{
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if(fp->type>=2)
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{
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MEMWRAP *wz;
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wz=(MEMWRAP *)fp->fp;
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if(wz->location+2>wz->size)
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{return 0;}
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*(uint32 *)t=*(uint32 *)(wz->data+wz->location);
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wz->location+=2;
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}
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else if(fp->type==1)
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if(gzread(fp->fp,&t,2)!=2) return(0);
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return(1);
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}
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else
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{
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if(fread(t,1,2,(FILE *)fp->fp)!=2) return(0);
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}
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*val=t[0]|(t[1]<<8);
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return(1);
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}
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int FCEU_read32le(uint32 *Bufo, FCEUFILE *fp)
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{
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if(fp->type>=1)
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{
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uint8 t[4];
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#ifndef LSB_FIRST
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uint8 x[4];
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#endif
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if(fp->type>=2)
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{
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MEMWRAP *wz;
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wz=(MEMWRAP *)fp->fp;
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if(wz->location+4>wz->size)
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{return 0;}
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*(uint32 *)t=*(uint32 *)(wz->data+wz->location);
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wz->location+=4;
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}
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else if(fp->type==1)
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gzread(fp->fp,&t,4);
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#ifndef LSB_FIRST
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x[0]=t[3];
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x[1]=t[2];
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x[2]=t[1];
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x[3]=t[0];
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*(uint32*)Bufo=*(uint32*)x;
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#else
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*(uint32*)Bufo=*(uint32*)t;
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#endif
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return 1;
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}
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else
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{
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return read32le(Bufo,(FILE *)fp->fp);
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}
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}
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int FCEU_fgetc(FCEUFILE *fp)
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{
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if(fp->type==1)
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return gzgetc(fp->fp);
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else if(fp->type>=2)
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{
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MEMWRAP *wz;
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wz=(MEMWRAP *)fp->fp;
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if(wz->location<wz->size)
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return wz->data[wz->location++];
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return EOF;
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}
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else
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return fgetc((FILE *)fp->fp);
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}
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uint64 FCEU_fgetsize(FCEUFILE *fp)
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{
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if(fp->type==1)
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{
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int x,t;
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t=gztell(fp->fp);
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gzrewind(fp->fp);
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for(x=0; gzgetc(fp->fp) != EOF; x++);
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gzseek(fp->fp,t,SEEK_SET);
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return(x);
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}
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else if(fp->type>=2)
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return ((MEMWRAP*)(fp->fp))->size;
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else
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{
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long t,r;
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t=ftell((FILE *)fp->fp);
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fseek((FILE *)fp->fp,0,SEEK_END);
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r=ftell((FILE *)fp->fp);
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fseek((FILE *)fp->fp,t,SEEK_SET);
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return r;
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}
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}
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int FCEU_fisarchive(FCEUFILE *fp)
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{
|
|
if(fp->type==2)
|
|
return 1;
|
|
return 0;
|
|
}
|