#ifndef _NR_UTILS_H_
#define _NR_UTILS_H_

extern float sqrarg;
extern double dsqrarg;
extern double dmaxarg1, dmaxarg2;
extern double dminarg1, dminarg2;
extern float maxarg1, maxarg2;
extern float minarg1, minarg2;
extern long lmaxarg1, lmaxarg2;
extern long lminarg1, lminarg2;
extern int imaxarg1, imaxarg2;
extern int iminarg1, iminarg2;

#define SQR(a)  ((sqrarg = (a)) == 0.0 ? 0.0 : sqrarg * sqrarg)

#define DSQR(a) ((dsqrarg = (a)) == 0.0 ? 0.0 : dsqrarg * dsqrarg)

#define DMAX(a, b)                   \
    (dmaxarg1 = (a), dmaxarg2 = (b), \
     (dmaxarg1) > (dmaxarg2) ? (dmaxarg1) : (dmaxarg2))

#define DMIN(a, b)                   \
    (dminarg1 = (a), dminarg2 = (b), \
     (dminarg1) < (dminarg2) ? (dminarg1) : (dminarg2))

#define FMAX(a, b)                 \
    (maxarg1 = (a), maxarg2 = (b), \
     (maxarg1) > (maxarg2) ? (maxarg1) : (maxarg2))

#define FMIN(a, b)                 \
    (minarg1 = (a), minarg2 = (b), \
     (minarg1) < (minarg2) ? (minarg1) : (minarg2))

#define LMAX(a, b)                   \
    (lmaxarg1 = (a), lmaxarg2 = (b), \
     (lmaxarg1) > (lmaxarg2) ? (lmaxarg1) : (lmaxarg2))

#define LMIN(a, b)                   \
    (lminarg1 = (a), lminarg2 = (b), \
     (lminarg1) < (lminarg2) ? (lminarg1) : (lminarg2))

#define IMAX(a, b)                   \
    (imaxarg1 = (a), imaxarg2 = (b), \
     (imaxarg1) > (imaxarg2) ? (imaxarg1) : (imaxarg2))

#define IMIN(a, b)                   \
    (iminarg1 = (a), iminarg2 = (b), \
     (iminarg1) < (iminarg2) ? (iminarg1) : (iminarg2))

#define SIGN(a, b) ((b) >= 0.0 ? fabs(a) : -fabs(a))

float *vector(int nl, int nh);
int *ivector(int nl, int nh);
unsigned char *cvector(int nl, int nh);
unsigned long *lvector(int nl, int nh);
double *dvector(int nl, int nh);
float **matrix(int nrl, int nrh, int ncl, int nch);
double **dmatrix(int nrl, int nrh, int ncl, int nch);
int **imatrix(int nrl, int nrh, int ncl, int nch);
float **submatrix(float **a, int oldrl, int oldrh, int oldcl, int oldch,
                  int newrl, int newcl);
float **convert_matrix(float *a, int nrl, int nrh, int ncl, int nch);
float ***f3tensor(int nrl, int nrh, int ncl, int nch, int ndl, int ndh);
void free_vector(float *v, int nl, int nh);
void free_ivector(int *v, int nl, int nh);
void free_cvector(unsigned char *v, int nl, int nh);
void free_lvector(unsigned long *v, int nl, int nh);
void free_dvector(double *v, int nl, int nh);
void free_matrix(float **m, int nrl, int nrh, int ncl, int nch);
void free_dmatrix(double **m, int nrl, int nrh, int ncl, int nch);
void free_imatrix(int **m, int nrl, int nrh, int ncl, int nch);
void free_submatrix(float **b, int nrl, int nrh, int ncl, int nch);
void free_convert_matrix(float **b, int nrl, int nrh, int ncl, int nch);
void free_f3tensor(float ***t, int nrl, int nrh, int ncl, int nch, int ndl,
                   int ndh);

#endif /* _NR_UTILS_H_ */
