| /* |
| * Function alias support |
| * |
| * Copyright 1995 Martin von Loewis |
| * |
| */ |
| |
| #include "windows.h" |
| #include "alias.h" |
| |
| #include "stddebug.h" |
| #include "debug.h" |
| |
| /* some large prime */ |
| #define TABLESIZE 2677 |
| |
| static ALIASHASH AliasTable[TABLESIZE]; |
| /* this could be a bit smaller */ |
| static FUNCTIONALIAS AliasRecord[TABLESIZE]; |
| /* record 0 is always empty */ |
| static int LastRecord; |
| |
| int ALIAS_UseAliases; |
| |
| /* closed hashing */ |
| static int ALIAS_LocateHash(DWORD value) |
| { |
| int hash,start; |
| start=hash=value%TABLESIZE; |
| while(AliasTable[hash].used && AliasTable[hash].used!=value) |
| { |
| hash++; |
| if(hash==TABLESIZE) |
| hash=0; |
| if(hash==start) |
| { |
| fprintf(stderr,"Hash table full, increase size in alias.c\n"); |
| exit(0); |
| } |
| } |
| return hash; |
| } |
| |
| void ALIAS_RegisterAlias(DWORD Wine,DWORD Win16, DWORD Win32) |
| { |
| int whash = 0, w16hash = 0, w32hash = 0, recno=0; |
| if (!Wine && !Win16 && !Win32) return; |
| if (Wine) |
| { |
| whash=ALIAS_LocateHash(Wine); |
| recno=AliasTable[whash].used?AliasTable[whash].recno:0; |
| } |
| if (Win16) |
| { |
| w16hash=ALIAS_LocateHash(Win16); |
| recno=AliasTable[w16hash].used?AliasTable[w16hash].recno:0; |
| } |
| if (Win32) |
| { |
| w32hash=ALIAS_LocateHash(Win32); |
| recno=AliasTable[w32hash].used?AliasTable[w32hash].recno:0; |
| } |
| if (!recno) |
| { |
| recno=LastRecord; |
| LastRecord++; |
| } |
| if (Wine) |
| { |
| AliasTable[whash].used=Wine; |
| AliasTable[whash].recno=recno; |
| AliasRecord[recno].wine=Wine; |
| } |
| if (Win16) |
| { |
| AliasTable[w16hash].used=Win16; |
| AliasTable[w16hash].recno=recno; |
| AliasRecord[recno].win16=Win16; |
| } |
| if (Win32) |
| { |
| AliasTable[w32hash].used=Win32; |
| AliasTable[w32hash].recno=recno; |
| AliasRecord[recno].win32=Win32; |
| } |
| } |
| |
| FUNCTIONALIAS* ALIAS_LookupAlias(DWORD fn) |
| { |
| int index; |
| index=ALIAS_LocateHash(fn); |
| if(AliasTable[index].used==fn) |
| return &AliasRecord[AliasTable[index].recno]; |
| return 0; |
| } |