_BasicNew implementation

lucretiomsp · November 18, 2022, 11:21pm

Hello everybody,
I would like to read the implementation of the function

_BasicNew

of the Object class.
in which file in GitHub can I find it?
thanks for your help.
d

jordan · November 18, 2022, 11:35pm

you can search though the code on GitHub. There are only two files.

jordan · November 19, 2022, 11:36am

Sorry, that was incredibly vague.

Functions beginning with underscores are implemented in C++ and are linked into supercollider from C++ with the C++ function definePrimitive.

This is the line where that linking happens…

github.com

supercollider/supercollider/blob/18c4aad363c49f29e866f884f5ac5bd35969d828/lang/LangPrimSource/PyrPrimitive.cpp#L4160


      
          
          
// general primitives
          base = nextPrimitiveIndex();
          index = 0;
          definePrimitive(base, index++, "_Halt", haltInterpreter, 1, 0);
          definePrimitive(base, index++, "_InstVarAt", instVarAt, 2, 0);
          definePrimitive(base, index++, "_InstVarPut", instVarPut, 3, 0);
          definePrimitive(base, index++, "_InstVarSize", instVarSize, 1, 0);
          definePrimitive(base, index++, "_ObjectHash", objectHash, 1, 0);
          definePrimitive(base, index++, "_ObjectClass", objectClass, 1, 0);
          definePrimitive(base, index++, "_BasicNew", basicNew, 2, 0);
          definePrimitive(base, index++, "_BasicNewClear", basicNewClear, 2, 0);
          definePrimitive(base, index++, "_BasicNewCopyArgsToInstVars", basicNewCopyArgsToInstanceVars, 1, 1);
          // definePrimitive(base, index++, "_BasicNewCopyArgsByName", basicNewCopyArgsByName, 1, 1);
          
          
definePrimitiveWithKeys(base, index, "_FunctionValue", blockValue, blockValueWithKeys, 1, 1);
          index += 2;
          definePrimitiveWithKeys(base, index, "_FunctionValueEnvir", blockValueEnvir, blockValueEnvirWithKeys, 1, 1);
          index += 2;
          
          
definePrimitive(base, index++, "_FunctionValueArray", blockValueArray, 1, 1);

The supercollider function (or rather primitive) called _BasicNew is connected to the C++ function basicNew, which is define here…

github.com

supercollider/supercollider/blob/18c4aad363c49f29e866f884f5ac5bd35969d828/lang/LangPrimSource/PyrPrimitive.cpp#L678


      
          
          
    int length = sc_min(numArgsPushed - 1, newobj->size);
              for (int i = 0; i < length; ++i) {
                  slotCopy(&newobj->slots[i], &b[i]);
              }
          
          
    return errNone;
          }
          
          

          
int basicNew(struct VMGlobals* g, int numArgsPushed) {
              PyrSlot *a, *b;
              int size;
              PyrClass* classobj;
              PyrObject* newobj;
          
          
    a = g->sp - 1;
              b = g->sp;
          
          
    if (NotObj(a))
                  return errWrongType;

lucretiomsp · November 21, 2022, 9:33pm

thank you very much!