Exporting strings
BlitzMax Forums/BlitzMax Programming/Exporting strings
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| What's the best method of passing a string to an external library? I have a DLL written in C and I want to pass string data to it. I can get string data into blitz from the DLL using the String.FromCString function. How do I do the other way around? I can pre-allocate the memory for the string in my DLL, but how do I pass the pointer to this allocated memory to blitz and how do I get blitz to copy the string into the memory that this pointer is pointing to? Cheers anyone for any help :P |
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| Use SomeString.ToCString() and remember to free it when done. Preallocating in the DLL isnt needed, as bmx already copies the string to the new pointer. |
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| Thanks grable for your quick reply :P So is the DLL is responsible for deleting the memory that blitz allocated for the string? So my function like this will be ok? Function myReadString:Byte Ptr(a:Int, b:Int) Local cString:Byte Ptr Local blitzString:String = ReadString(a,b) cString = blitzString.ToCString(); Return cString End Function |
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| Just checked, and yep, that worked. Thanks very much grable. Cheers! |
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