function BMPos(const aSource, aFind: Pointer; const aSourceLen, aFindLen: Integer; var JumpTable: TBMJumpTable): Pointer;
var
LastPos: Pointer;
begin
LastPos := Pointer(Integer(aSource) + aSourceLen - 1);
asm
push ESI
push EDI
push EBX mov EAX, aFindLen
mov ESI, aSource
lea ESI, ESI + EAX - 1
std
mov EBX, JumpTable@@comparetext:
cmp ESI, LastPos
jg @@NotFound
mov EAX, aFindLen
mov EDI, aFind
mov ECX, EAX
push ESI //Remember where we are
lea EDI, EDI + EAX - 1
xor EAX, EAX
@@CompareNext:
mov al, [ESI]
cmp al, [EDI]
jne @@LookAhead
lea ESI, ESI - 1
lea EDI, EDI - 1
dec ECX
jz @@Found
jmp @@CompareNext@@LookAhead:
//Look up the char in our Jump Table
pop ESI
mov al, [ESI]
mov EAX, [EBX + EAX * 4]
lea ESI, ESI + EAX
jmp @@CompareText@@NotFound:
mov Result, 0
jmp @@TheEnd
@@Found:
pop EDI //We are just popping, we don't need the value
inc ESI
mov Result, ESI
@@TheEnd:
cld
pop EBX
pop EDI
pop ESI
end;
end;
var
LastPos: Pointer;
begin
LastPos := Pointer(Integer(aSource) + aSourceLen - 1);
asm
push ESI
push EDI
push EBX mov EAX, aFindLen
mov ESI, aSource
lea ESI, ESI + EAX - 1
std
mov EBX, JumpTable@@comparetext:
cmp ESI, LastPos
jg @@NotFound
mov EAX, aFindLen
mov EDI, aFind
mov ECX, EAX
push ESI //Remember where we are
lea EDI, EDI + EAX - 1
xor EAX, EAX
@@CompareNext:
mov al, [ESI]
cmp al, [EDI]
jne @@LookAhead
lea ESI, ESI - 1
lea EDI, EDI - 1
dec ECX
jz @@Found
jmp @@CompareNext@@LookAhead:
//Look up the char in our Jump Table
pop ESI
mov al, [ESI]
mov EAX, [EBX + EAX * 4]
lea ESI, ESI + EAX
jmp @@CompareText@@NotFound:
mov Result, 0
jmp @@TheEnd
@@Found:
pop EDI //We are just popping, we don't need the value
inc ESI
mov Result, ESI
@@TheEnd:
cld
pop EBX
pop EDI
pop ESI
end;
end;
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