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- #ifdef KR_headers
- extern double sqrt();
- double f__cabs(real, imag) double real, imag;
- #else
- #undef abs
- #include "math.h"
- #ifdef __cplusplus
- extern "C" {
- #endif
- double f__cabs(double real, double imag)
- #endif
- {
- double temp;
- if(real < 0)
- real = -real;
- if(imag < 0)
- imag = -imag;
- if(imag > real){
- temp = real;
- real = imag;
- imag = temp;
- }
- if((real+imag) == real)
- return(real);
- temp = imag/real;
- temp = real*sqrt(1.0 + temp*temp); /*overflow!!*/
- return(temp);
- }
- #ifdef __cplusplus
- }
- #endif
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