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