Monks;
I have just started dabbling with XS, and I've run into a snag. I want to change the way I'm calling the XS routine to use named parameters instead of positional parameters. So instead of this: 
calculate('V_MIN',4.5);

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I can do this: 
calculate(NAME => 'V_MIN',
          THETA => 4.5);

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I've looked at perlxs, but haven't found a way to do this. I want to be anle to get the values from the passed-in hash for keys "NAME" and "THETA". Here's my best quess thus far: 
int
calculate(hash)
  HV * hash;
CODE:
char * name;
float theta;

  name = (char *)hv_fetch(hash,"NAME",4,0);
  theta = hv_fetch(hash,"THETA",5,0);
  printf("%s,%.1f\n",name,theta);
    .
    .
    .
  RETVAL = 1;
OUTPUT:
  RETVAL

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...but it won't even compile. I get errors: 
ChemC.xs: In function `XS_ChemC_calculate':
ChemC.xs:122: parse error before `char'
ChemC.xs:125: `name' undeclared (first use in this function)
ChemC.xs:125: (Each undeclared identifier is reported only once
ChemC.xs:125: for each function it appears in.)
ChemC.xs:126: `theta' undeclared (first use in this function)
make: *** [ChemC.o] Error 1

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Can anyone help?
Nelson

In reply to XS hash question by Anonymous Monk

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