#ifndef _NR_UTILS_H_ 
#define _NR_UTILS_H_ 

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

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

static double dmaxarg1,dmaxarg2; 
#define DMAX(a,b) (dmaxarg1=(a),dmaxarg2=(b),(dmaxarg1) > (dmaxarg2)?(dmaxarg1) : (dmaxarg2)) 

static double dminarg1,dminarg2; 
#define DMIN(a,b) (dminarg1=(a),dminarg2=(b),(dminarg1) < (dminarg2)?(dminarg1) : (dminarg2)) 

static float maxarg1,maxarg2; 
#define FMAX(a,b) (maxarg1=(a),maxarg2=(b),(maxarg1) > (maxarg2) ? (maxarg1) : (maxarg2)) 

static float minarg1,minarg2; 
#define FMIN(a,b) (minarg1=(a),minarg2=(b),(minarg1) < (minarg2) ? (minarg1) : (minarg2)) 

static long lmaxarg1,lmaxarg2; 
#define LMAX(a,b) (lmaxarg1=(a),lmaxarg2=(b),(lmaxarg1) > (lmaxarg2) ?(lmaxarg1) : (lmaxarg2)) 

static long lminarg1,lminarg2; 
#define LMIN(a,b) (lminarg1=(a),lminarg2=(b),(lminarg1) < (lminarg2) ? (lminarg1) : (lminarg2)) 

static int imaxarg1,imaxarg2; 
#define IMAX(a,b) (imaxarg1=(a),imaxarg2=(b),(imaxarg1) > (imaxarg2) ? (imaxarg1) : (imaxarg2)) 

static int iminarg1,iminarg2; 
#define IMIN(a,b) (iminarg1=(a),iminarg2=(b),(iminarg1) < (iminarg2) ? (iminarg1) : (iminarg2)) 

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

#if defined(__STDC__) || defined(ANSI) || defined(NRANSI) /* ANSI */ 

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

#else /* ANSI */ 
/* traditional - K&R */ 

void nrerror(); 
float *vector(); 
float **matrix(); 
float **submatrix(); 
float **convert_matrix(); 
float ***f3tensor(); 
double *dvector(); 
double **dmatrix(); 
int *ivector(); 
int **imatrix(); 
unsigned char *cvector(); 
unsigned long *lvector(); 
void free_vector(); 
void free_dvector(); 
void free_ivector(); 
void free_cvector(); 
void free_lvector(); 
void free_matrix(); 
void free_submatrix(); 
void free_convert_matrix(); 
void free_dmatrix(); 
void free_imatrix(); 
void free_f3tensor(); 

#endif /* ANSI */ 

#endif /* _NR_UTILS_H_ */