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

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revision 592, Thu Mar 3 05:16:50 2005 UTC revision 738, Tue May 17 17:25:31 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    
69  extern   /* stored pointers to symbols initialized in R_init_Matrix */  extern   /* stored pointers to symbols initialized in R_init_Matrix */
70  #include "Syms.h"  #include "Syms.h"
# Line 70  Line 72 
72  /* zero an array */  /* zero an array */
73  #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;}
74    
75    /* number of elements in one triangle of a square matrix of order n */
76    #define PACKED_LENGTH(n)   ((n) * ((n) + 1))/2
77    
78    /* duplicate the slot with name given by sym from src to dest */
79    #define slot_dup(dest, src, sym)  SET_SLOT(dest, sym, duplicate(GET_SLOT(src, sym)))
80    
81    /**
82     * Check for valid length of a packed triangular array and return the
83     * corresponding number of columns
84     *
85     * @param len length of a packed triangular array
86     *
87     * @return number of columns
88     */
89    static R_INLINE
90    int packed_ncol(int len)
91    {
92        int disc = 8 * len + 1;     /* discriminant */
93        int sqrtd = (int) sqrt((double) disc);
94    
95        if (len < 0 || disc != sqrtd * sqrtd)
96            error(_("invalid 'len' = %d in packed_ncol"));
97        return (sqrtd - 1)/2;
98    }
99    
100  /**  /**
101   * 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
102   * the object, and return the SEXP.  The validity of this function   * the object, and return the SEXP.  The validity of this function
# Line 95  Line 122 
122  }  }
123    
124  /**  /**
125   * Expand the column pointers in the array mp into a full set of column indices   * Expand compressed pointers in the array mp into a full set of indices
126   * in the array mj.   * in the array mj.
127   *   *
128   * @param ncol number of columns   * @param ncol number of columns (or rows)
129   * @param mp column pointer vector of length ncol + 1   * @param mp column pointer vector of length ncol + 1
130   * @param mj vector of length mp[ncol] - 1 to hold the result   * @param mj vector of length mp[ncol] to hold the result
131   *   *
132   * @return mj   * @return mj
133   */   */
134  static R_INLINE  static R_INLINE
135  int* expand_column_pointers(int ncol, const int mp[], int mj[])  int* expand_cmprPt(int ncol, const int mp[], int mj[])
136  {  {
137      int j;      int j;
138      for (j = 0; j < ncol; j++) {      for (j = 0; j < ncol; j++) {
# Line 214  Line 241 
241    
242  void make_array_triangular(double *x, SEXP from);  void make_array_triangular(double *x, SEXP from);
243    
244    SEXP Matrix_expand_pointers(SEXP pP);
245    
246  #ifdef __cplusplus  #ifdef __cplusplus
247  }  }
248  #endif  #endif

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