%% Fixes for c-code generation

%% Set PI explicitly here to avoid later conflict with cc headers
%% if PI is not already a number (i.e. on rounded has not been set)
IF NOT NUMBERP (pi) THEN LET PI = 3.14159$

ON ROUNDED$ % No integer output

%% Changes x^y to pow(x,y)
 OPERATOR pow$
 FOR ALL x,y LET x^y = pow(x,y)$ % Use the pow function
 

 %% Derivatives
 FOR ALL f,g,x LET df(pow(f,g),x)=
 	   pow(f,g-1) * (df(f,x)*g + df(g,x)*f*log(f))$

 %% Special cases
 FOR ALL x LET pow(x,0) = 1$
 FOR ALL x LET pow(x,1) = x$
 FOR ALL x,y,z LET pow(x,y)*pow(x,z) = pow(x,y+z)$ 
 FOR ALL x,y,z LET pow(pow(x,y),z) = pow(x,y*z)$

OPERATOR fabs$
FOR ALL x let abs(x) = fabs(x)$


END$