lopwidget.blogg.se - Delphi variant to float

It just happens that a convention allows us to pass the starting address of an array of chars as a PChar. A pointer to a char or to a byte are both the addresses of one byte in memory.

binary equivalents for instance parameter declarations A and B below are equivalent:.

untyped pointers, for example, FuncU( var Value) in Object Pascal or void FuncU( void * U) in C++, and.

But there are cases where the script interpreter is unable to determine the needed native type definitely. In most cases, the conversion from the OLE variant to the native application type and back is performed automatically. The VariantToVarRec function which you can find in the code is what I am looking after.įor now I have coded it myself, but only for a small range of data types and with a lot of overkill memory buffer (using dynamic arrays of every type to keep track of all the memory), because TVarRec only keeps Pointers for most types.Īll I can suggest right now is a Google Groups search: Regards, JohnH.Calling methods, functions or procedures in an Open Application from TestComplete scripts may likewise require preprocessing for their parameters. What I want to get out is a formated string, which is formated following a formatting rule given in FormatStr, but the Format function only accepty arrays of TVarRec (array of const).īut TVarRec uses Delphi types while variant and namely TVarData uses OLE types. Only accepts extended I thought that if it accepted extended, then it could accept single and double, too. Delphi Variant To Float Code Sample Ofįabian, How about a code sample of what you are trying to do Quote Variant allows 4 or 8 byte floating point values while TVarRec only accepts the 10 byte extended type.

Delphi Variant To Float How To Convert VariantsĪpart from that: Is there an official conversion routine between the var (varString, varSingle.) and the vt (vtChar, vtExtended.) constants best regards, Fabian.