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/* ========================================================================== */
/* === UMF_report_perm ====================================================== */
/* ========================================================================== */

/* -------------------------------------------------------------------------- */
/* UMFPACK Version 4.5, Copyright (c) 2005 by Timothy A. Davis.  CISE Dept,   */
/* Univ. of Florida.  All Rights Reserved.  See ../Doc/License for License.   */
/* web: http://www.cise.ufl.edu/research/sparse/umfpack                       */
/* -------------------------------------------------------------------------- */

#include "umf_internal.h"

#define PRINTF4U(params) { if (user || prl >= 4) PRINTF (params) ; }

GLOBAL Int UMF_report_perm
(
    Int n,
    const Int P [ ],
    Int W [ ],      /* workspace of size n */
    Int prl,
    Int user
)
{
    Int i, k, valid, prl1 ;

    ASSERT (prl >= 3) ;

    PRINTF4U (("permutation vector, n = "ID". ", n)) ;

    if (n <= 0)
    {
    PRINTF (("ERROR: length of permutation is <= 0\n\n")) ;
    return (UMFPACK_ERROR_n_nonpositive) ;
    }

    if (!P)
    {
    /* if P is (Int *) NULL, this is the identity permutation */
    PRINTF (("(not present)\n\n")) ;
    return (UMFPACK_OK) ;
    }

    if (!W)
    {
    PRINTF (("ERROR: out of memory\n\n")) ;
    return (UMFPACK_ERROR_out_of_memory) ;
    }

    PRINTF4 (("\n")) ;

    for (i = 0 ; i < n ; i++)
    {
    W [i] = TRUE ;
    }

    prl1 = prl ;
    for (k = 0 ; k < n ; k++)
    {
    i = P [k] ;
    PRINTF4 (("    "ID" : "ID" ", INDEX (k), INDEX (i))) ;
    valid = (i >= 0 && i < n) ;
    if (valid)
    {
        valid = W [i] ;
        W [i] = FALSE ;
    }
    if (!valid)
    {
        /* out of range or duplicate entry */
        PRINTF (("ERROR: invalid\n\n")) ;
        return (UMFPACK_ERROR_invalid_permutation) ;
    }
    PRINTF4 (("\n")) ;
    if (prl == 4 && k == 9 && n > 10)
    {
        PRINTF (("    ...\n")) ;
        prl-- ;
    }
    }
    prl = prl1 ;

    PRINTF4 (("    permutation vector ")) ;
    PRINTF4U (("OK\n\n")) ;
    return (UMFPACK_OK) ;
}