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[matrix] Diff of /pkg/Matrix/src/Mutils.h
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Diff of /pkg/Matrix/src/Mutils.h

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revision 592, Thu Mar 3 05:16:50 2005 UTC revision 597, Thu Mar 3 19:58:59 2005 UTC
# Line 63  Line 63 
63                         enum CBLAS_UPLO uplo);                         enum CBLAS_UPLO uplo);
64  double *full_to_packed(double *dest, const double *src, int n,  double *full_to_packed(double *dest, const double *src, int n,
65                         enum CBLAS_UPLO uplo, enum CBLAS_DIAG diag);                         enum CBLAS_UPLO uplo, enum CBLAS_DIAG diag);
66    double *packed_getDiag(double *dest, SEXP x);
67    
68  extern   /* stored pointers to symbols initialized in R_init_Matrix */  extern   /* stored pointers to symbols initialized in R_init_Matrix */
69  #include "Syms.h"  #include "Syms.h"
# Line 70  Line 71 
71  /* zero an array */  /* zero an array */
72  #define AZERO(x, n) {int _I_, _SZ_ = (n); for(_I_ = 0; _I_ < _SZ_; _I_++) (x)[_I_] = 0;}  #define AZERO(x, n) {int _I_, _SZ_ = (n); for(_I_ = 0; _I_ < _SZ_; _I_++) (x)[_I_] = 0;}
73    
74    /* number of elements in one triangle of a square matrix of order n */
75    #define PACKED_LENGTH(n)   ((n) * ((n) + 1))/2
76    
77    /**
78     * Check for valid length of a packed triangular array and return the
79     * corresponding number of columns
80     *
81     * @param len length of a packed triangular array
82     *
83     * @return number of columns
84     */
85    static R_INLINE
86    int packed_ncol(int len)
87    {
88        int disc = 8 * len + 1;     /* discriminant */
89        int sqrtd = (int) sqrt((double) disc);
90    
91        if (len < 0 || disc != sqrtd * sqrtd)
92            error(_("invalid 'len' = %d in packed_ncol"));
93        return (sqrtd - 1)/2;
94    }
95    
96  /**  /**
97   * Allocate an SEXP of given type and length, assign it as slot nm in   * Allocate an SEXP of given type and length, assign it as slot nm in
98   * the object, and return the SEXP.  The validity of this function   * the object, and return the SEXP.  The validity of this function

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