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1 /* ========================================================================== */ |
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2 /* === UMF_symbolic_usage =================================================== */ |
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3 /* ========================================================================== */ |
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4 |
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5 /* -------------------------------------------------------------------------- */ |
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6 /* UMFPACK Version 4.4, Copyright (c) 2005 by Timothy A. Davis. CISE Dept, */ |
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7 /* Univ. of Florida. All Rights Reserved. See ../Doc/License for License. */ |
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8 /* web: http://www.cise.ufl.edu/research/sparse/umfpack */ |
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9 /* -------------------------------------------------------------------------- */ |
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10 |
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11 /* Returns the final size of the Symbolic object, in Units */ |
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12 |
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13 #include "umf_internal.h" |
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14 |
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15 GLOBAL double UMF_symbolic_usage |
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16 ( |
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17 Int n_row, |
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18 Int n_col, |
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19 Int nchains, |
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20 Int nfr, |
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21 Int esize, /* zero if no dense rows. Otherwise, equal to the |
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22 * number of non-singleton, non-empty columns */ |
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23 Int prefer_diagonal |
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24 ) |
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25 { |
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26 double units ; |
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27 |
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28 units = |
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29 DUNITS (SymbolicType, 1) /* Symbolic structure */ |
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30 + 2 * DUNITS (Int, n_col+1) /* Cperm_init, Cdeg */ |
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31 + 2 * DUNITS (Int, n_row+1) /* Rperm_init, Rdeg */ |
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32 + 3 * DUNITS (Int, nchains+1) /* Chain_ */ |
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33 + 4 * DUNITS (Int, nfr+1) ; /* Front_ */ |
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34 |
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35 /* if dense rows are present */ |
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36 units += DUNITS (Int, esize) ; /* Esize */ |
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37 |
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38 /* for diagonal pivoting */ |
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39 if (prefer_diagonal) |
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40 { |
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41 units += DUNITS (Int, n_col+1) ; /* Diagonal_map */ |
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42 } |
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43 |
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44 return (units) ; |
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45 } |
