guides:machine_code:com

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision		 Previous revision
guides:machine_code:com [2025-03-26 17:49] – [Using COM with MCode] Link to COM APIs guide geekguides:machine_code:com [2025-03-28 13:28] (current) – [Using COM with MCode] Link MCode guide geek
Line 1: Line 1:
 ====== Using COM with MCode ====== ====== Using COM with MCode ======
  
-Before continuing, consider reading the [[guides:com:start|COM APIs]] guide.+Please read the basic [[guides:machine_code|MCode]] guide before this one! 
 + 
 +If you have not, consider referencing the [[guides:com:start|COM APIs]] guide to learn more about how COM works.
  
 When building integrations for AutoHotkey using MCode, it is often convenient to be able to work with COM objects. Either consuming COM objects in your MCode, or exporting COM objects from your MCode so they can be consumed by AHK. When building integrations for AutoHotkey using MCode, it is often convenient to be able to work with COM objects. Either consuming COM objects in your MCode, or exporting COM objects from your MCode so they can be consumed by AHK.
Line 536: Line 538:
 input := [1, 2, 3] input := [1, 2, 3]
 MsgBox lib.SumValues(ObjPtr(input)) MsgBox lib.SumValues(ObjPtr(input))
 +</runner>
 +
 +==== Implementing QuickSort ====
 +
 +By invoking ''DISPID_VALUE'' with ''DISPATCH_PROPERTYGET'' and ''DISPATCH_PROPERTYPUT'', we can get and set values from an object's item store. This allows us to implement a basic Quicksort algorithm that applies to a provided array:
 +
 +<runner ahk2>
 +#Requires AutoHotkey v2.0
 +#include <MCL>
 +
 +lib := MCL.FromC("
 +(
 +#include <mcl.h>
 +#include <stdlib.h>
 +#include <oaidl.h>
 +
 +#define E_FAIL 0x80004005
 +
 +MCL_IMPORT(HRESULT, OleAut32, VarCmp, (VARIANT* left, VARIANT* right, DWORD lcid, ULONG dwFlags));
 +MCL_IMPORT(HRESULT, OleAut32, VariantClear, (VARIANT* pvarg));
 +
 +HRESULT GetItem(IDispatch* array, ULONG index, VARIANT* pvarResult) {
 +    VARIANT vargGet = { .vt = VT_I4, .lVal = index };
 +    DISPPARAMS dpGet = { .cArgs = 1, .cNamedArgs = 0, .rgvarg = &vargGet };
 +    return array->lpVtbl->Invoke(
 +        array, DISPID_VALUE, NULL, 0, DISPATCH_PROPERTYGET,
 +        &dpGet, pvarResult, NULL, NULL);
 +}
 +
 +HRESULT PutItem(IDispatch* array, ULONG index, VARIANT* pvarItem) {
 +    VARIANT vargIndex = { .vt = VT_I4, .lVal = index };
 +    VARIANT rgvargArgs[] = { *pvarItem, vargIndex };
 +    DISPPARAMS dpPut = { .cArgs = 2, .cNamedArgs = 0, .rgvarg = rgvargArgs };
 +    return array->lpVtbl->Invoke(
 +        array, DISPID_VALUE, NULL, 0, DISPATCH_PROPERTYPUT,
 +        &dpPut, NULL, NULL, NULL);
 +}
 +
 +HRESULT partition(IDispatch *array, ULONG lo, ULONG hi, ULONG* newPartition) {
 +    HRESULT result = E_FAIL;
 +
 +    VARIANT varHi = { .vt = VT_EMPTY };
 +    VARIANT varI = { .vt = VT_EMPTY };
 +    VARIANT varJ = { .vt = VT_EMPTY };
 +
 +    // Use highest index value as pivot
 +    if (S_OK != GetItem(array, hi, &varHi)) goto fail;
 +
 +    ULONG i = lo;
 +    for (ULONG j = lo; j < hi; j++) {
 +        if (S_OK != GetItem(array, j, &varJ)) goto fail;
 +        // lcid = LOCALE_INVARIANT, dwFlags = NORM_IGNORECASE
 +        if (
 +            (varJ.vt != varHi.vt) ? (varJ.vt <= varHi.vt) :
 +            VarCmp(&varJ, &varHi, 0x7F, 0x1) < 2) {
 +            if (S_OK != GetItem(array, i, &varI)) goto fail;
 +            if (S_OK != PutItem(array, i, &varJ)) goto fail;
 +            if (S_OK != PutItem(array, j, &varI)) goto fail;
 +            i = i + 1;
 +            VariantClear(&varI);
 +        }
 +        VariantClear(&varJ);
 +    }
 +
 +    // Center the pivot value
 +    if (S_OK != GetItem(array, i, &varI)) goto fail;
 +    if (S_OK != PutItem(array, i, &varHi)) goto fail;
 +    if (S_OK != PutItem(array, hi, &varI)) goto fail;
 +
 +    *newPartition = i;
 +    result = S_OK;
 +
 +    fail:
 +    VariantClear(&varHi);
 +    VariantClear(&varI);
 +    VariantClear(&varJ);
 +    return result;
 +}
 +
 +MCL_EXPORT(quicksort, Ptr, array, UInt, lo, UInt, hi, CDecl_Int);
 +HRESULT quicksort(IDispatch *array, ULONG lo, ULONG hi) {
 +    if (lo >= hi) return S_OK;
 +    ULONG p = 0;
 +    if (S_OK != partition(array, lo, hi, &p)) return E_FAIL;
 +    if (S_OK != quicksort(array, lo, p - 1)) return E_FAIL;
 +    if (S_OK != quicksort(array, p + 1, hi)) return E_FAIL;
 +    return S_OK;
 +}
 +
 +)")
 +
 +x := ["c", 6, 3.0, 3, 8, "b", 9, 2.0, 4, 5, "a", 1,2, 1.0, 7]
 +
 +MsgBox "Before Sorting: " JSON.Dump(x)
 +
 +lib.quicksort(ObjPtr(x), 1, x.Length)
 +
 +MsgBox "After Sorting: " JSON.Dump(x)
 </runner> </runner>