general.c

   1 /* FCE Ultra - NES/Famicom Emulator
   2  *
   3  * Copyright notice for this file:
   4  *  Copyright (C) 2002 Ben Parnell
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <stdio.h>
  24
  25 #include "types.h"
  26
  27 #include "general.h"
  28 #include "state.h"
  29 #include "version.h"
  30 #include "svga.h"
  31 #include "driver.h"
  32
  33 char *marray[1]={"Error allocating memory!"};
  34
  35 static char BaseDirectory[2048];
  36 static char FileBase[2048];
  37 static char FileExt[2048];
  38 static char FileBaseDirectory[2048];
  39
  40 void FCEUI_SetBaseDirectory(char *dir)
  41 {
  42  strncpy(BaseDirectory,dir,2047);
  43  BaseDirectory[2047]=0;
  44 }
  45
  46 static char *odirs[FCEUIOD__COUNT]={0,0,0,0,0};     // odirs, odors. ^_^
  47
  48 void FCEUI_SetDirOverride(int which, char *n)
  49 {
  50  odirs[which]=n;
  51  if(which==FCEUIOD_STATE)
  52   SaveStateRefresh();
  53 }
  54
  55 /* We should probably use snprintf(), but many C libraries don't seem to
  56    have this function.
  57 */
  58 char *FCEU_MakeFName(int type, int id1, char *cd1)
  59 {
  60  static uint8 ret[2048];
  61
  62  ret[0]=0;
  63  switch(type)
  64  {
  65   case FCEUMKF_STATE:if(odirs[FCEUIOD_STATE])
  66                       sprintf(((char*)ret),"%s"PSS"%s.fc%d",odirs[FCEUIOD_STATE],FileBase,id1);
  67                      else
  68                       sprintf(((char*)ret),"%s"PSS"fcs"PSS"%s.fc%d",BaseDirectory,FileBase,id1);
  69                      break;
  70   case FCEUMKF_SNAP:
  71                     if(FSettings.SnapName)
  72                     {
  73                      if(odirs[FCEUIOD_SNAPS])
  74                       sprintf(((char*)ret),"%s"PSS"%s-%d.%s",odirs[FCEUIOD_SNAPS],FileBase,id1,cd1);
  75                      else
  76                       sprintf(((char*)ret),"%s"PSS"snaps"PSS"%s-%d.%s",BaseDirectory,FileBase,id1,cd1);
  77                     }
  78                     else
  79                     {
  80                      if(odirs[FCEUIOD_SNAPS])
  81                       sprintf(((char*)ret),"%s"PSS"%d.%s",odirs[FCEUIOD_SNAPS],id1,cd1);
  82                      else
  83                       sprintf(((char*)ret),"%s"PSS"snaps"PSS"%d.%s",BaseDirectory,id1,cd1);
  84                     }
  85                     break;
  86   case FCEUMKF_SAV:if(odirs[FCEUIOD_NV])
  87                    {
  88                     sprintf(((char*)ret),"%s"PSS"%s.%s",odirs[FCEUIOD_NV],FileBase,cd1);
  89                    }
  90                    else
  91                    {
  92                     if(FSettings.SUnderBase)
  93                      sprintf(((char*)ret),"%s"PSS"sav"PSS"%s.%s",BaseDirectory,FileBase,cd1);
  94                     else
  95                      sprintf(((char*)ret),"%s"PSS"%s.%s",FileBaseDirectory,FileBase,cd1);
  96                    }
  97                    break;
  98   case FCEUMKF_CHEAT:
  99                      if(odirs[FCEUIOD_CHEATS])
 100                       sprintf(((char*)ret),"%s"PSS"%s.cht",odirs[FCEUIOD_CHEATS],FileBase);
 101                      else
 102                       sprintf(((char*)ret),"%s"PSS"cheats"PSS"%s.cht",BaseDirectory,FileBase);
 103                      break;
 104   case FCEUMKF_GGROM:sprintf(((char*)ret),"%s"PSS"gg.rom",BaseDirectory);break;
 105   case FCEUMKF_FDSROM:sprintf(((char*)ret),"%s"PSS"disksys.rom",BaseDirectory);break;
 106   case FCEUMKF_PALETTE:
 107                        if(odirs[FCEUIOD_MISC])
 108                         sprintf(((char*)ret),"%s"PSS"%s.pal",odirs[FCEUIOD_MISC],FileBase);
 109                        else
 110                         sprintf(((char*)ret),"%s"PSS"gameinfo"PSS"%s.pal",BaseDirectory,FileBase);
 111                        break;
 112  }
 113  return((char *)ret);
 114 }
 115
 116 void GetFileBase(char *f)
 117 {
 118         char *tp1,*tp3;
 119
 120  #if PSS_STYLE==4
 121      tp1=((char *)strrchr(f,':'));
 122  #elif PSS_STYLE==1
 123      tp1=((char *)strrchr(f,'/'));
 124  #else
 125      tp1=((char *)strrchr(f,'\\'));
 126   #if PSS_STYLE!=3
 127      tp3=((char *)strrchr(f,'/'));
 128      if(tp1<tp3) tp1=tp3;
 129   #endif
 130  #endif
 131      if(!tp1)
 132      {
 133       tp1=f;
 134       strcpy(FileBaseDirectory,".");
 135      }
 136      else
 137      {
 138       memcpy(FileBaseDirectory,f,tp1-f);
 139       FileBaseDirectory[tp1-f]=0;
 140       tp1++;
 141      }
 142
 143      if((tp3=strrchr(f,'.'))!=NULL)
 144      {
 145       memcpy(FileBase,tp1,tp3-tp1);
 146       FileBase[tp3-tp1]=0;
 147       strcpy(FileExt,tp3+1);
 148      }
 149      else
 150      {
 151       strcpy(FileBase,tp1);
 152       FileExt[0]=0;
 153      }
 154 }
 155
 156 uint32 uppow2(uint32 n)
 157 {
 158  int x;
 159
 160  for(x=31;x>=0;x--)
 161   if(n&(1<<x))
 162   {
 163    if((1<<x)!=n)
 164     return(1<<(x+1));
 165    break;
 166   }
 167  return n;
 168 }
 169