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colamd.h

/* ========================================================================== */
/* === colamd prototypes and definitions ==================================== */
/* ========================================================================== */

/*
    This is the colamd include file,

      http://www.cise.ufl.edu/~davis/colamd/colamd.h

    for use in the colamd.c, colamdmex.c, and symamdmex.c files located at

      http://www.cise.ufl.edu/~davis/colamd/

    See those files for a description of colamd and symamd, and for the
    copyright notice, which also applies to this file.

    August 3, 1998.  Version 1.0.
*/

/* ========================================================================== */
/* === Definitions ========================================================== */
/* ========================================================================== */

/* size of the knobs [ ] array.  Only knobs [0..1] are currently used. */
#define COLAMD_KNOBS 20

/* number of output statistics.  Only A [0..2] are currently used. */
#define COLAMD_STATS 20

/* knobs [0] and A [0]: dense row knob and output statistic. */
#define COLAMD_DENSE_ROW 0

/* knobs [1] and A [1]: dense column knob and output statistic. */
#define COLAMD_DENSE_COL 1

/* A [2]: memory defragmentation count output statistic */
#define COLAMD_DEFRAG_COUNT 2

/* A [3]: whether or not the input columns were jumbled or had duplicates */
#define COLAMD_JUMBLED_COLS 3

/* ========================================================================== */
/* === Prototypes of user-callable routines ================================= */
/* ========================================================================== */

int colamd_recommended        /* returns recommended value of Alen */
(
    int nnz,                  /* nonzeros in A */
    int n_row,                /* number of rows in A */
    int n_col                 /* number of columns in A */
) ;

void colamd_set_defaults      /* sets default parameters */
(                       /* knobs argument is modified on output */
    double knobs [COLAMD_KNOBS]     /* parameter settings for colamd */
) ;

int colamd              /* returns TRUE if successful, FALSE otherwise*/
(                       /* A and p arguments are modified on output */
    int n_row,                /* number of rows in A */
    int n_col,                /* number of columns in A */
    int Alen,                 /* size of the array A */
    int A [],                 /* row indices of A, of size Alen */
    int p [],                 /* column pointers of A, of size n_col+1 */
    double knobs [COLAMD_KNOBS]     /* parameter settings for colamd */
) ;


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