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com.d: Support float / double retrieval in Variant

This commit is contained in:
Dennis 2024-05-09 17:04:02 +02:00 committed by GitHub
parent bab31bab6c
commit b4b8bbcc6b
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1 changed files with 35 additions and 7 deletions
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42
com.d
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@ -250,11 +250,11 @@ struct ComResult {
T getD(T)() {
switch(result.vt) {
case 3: // int
case Vt.long_: // int
static if(is(T : const long))
return result.intVal;
throw new Exception("cannot convert variant of type int to requested " ~ T.stringof);
case 8: // string
case Vt.string_:
static if(is(T : const string))
return makeUtf8StringFromWindowsString(result.bstrVal); // FIXME free?
throw new Exception("cannot convert variant of type string to requested " ~ T.stringof);
@ -720,6 +720,28 @@ auto getComObject(T = Dynamic)(wstring c, bool tryCreateIfGetFails = true) {
// FIXME: add one to get by ProgID rather than always guid
// FIXME: add a dynamic com object that uses IDispatch
/// Variant Type
/// https://learn.microsoft.com/en-us/office/vba/language/reference/user-interface-help/vartype-function
private enum Vt
{
empty = 0,
null_ = 1,
integer = 2,
long_ = 3,
single = 4,
double_ = 5,
currency = 6,
date = 7,
string_ = 8,
object = 9,
error = 10,
boolean = 11,
variant = 12,
dataObject = 13,
decimal = 14,
byte_ = 17,
longLong = 20,
}
/* COM SERVER CODE */
@ -729,19 +751,25 @@ T getFromVariant(T)(VARIANT arg) {
static if(is(T == void)) {
return;
} else static if(is(T == int)) {
if(arg.vt == 3)
if(arg.vt == Vt.long_)
return arg.intVal;
} else static if (is(T == float)) {
if(arg.vt == Vt.single)
return arg.fltVal;
} else static if (is(T == double)) {
if(arg.vt == Vt.double_)
return arg.dblVal;
} else static if(is(T == bool)) {
if(arg.vt == 11)
if(arg.vt == Vt.boolean)
return arg.boolVal ? true : false;
} else static if(is(T == string)) {
if(arg.vt == 8) {
if(arg.vt == Vt.string_) {
auto str = arg.bstrVal;
scope(exit) SysFreeString(str);
return to!string(str[0 .. SysStringLen(str)]);
}
} else static if(is(T == IDispatch)) {
if(arg.vt == 9)
if(arg.vt == Vt.object)
return arg.pdispVal;
} else static if(is(T : IUnknown)) {
// if(arg.vt == 13)
@ -789,7 +817,7 @@ T getFromVariant(T)(VARIANT arg) {
}
}
}
throw new Exception("Type mismatch, needed "~ T.stringof ~"got " ~ to!string(arg.vt));
throw new Exception("Type mismatch, needed "~ T.stringof ~" got " ~ to!string(cast(Vt) arg.vt));
assert(0);
}