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[matrix] Diff of /pkg/Matrix/src/Csparse.c
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Diff of /pkg/Matrix/src/Csparse.c

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revision 2236, Wed Jul 23 16:48:14 2008 UTC revision 2279, Fri Oct 3 09:15:54 2008 UTC
# Line 3  Line 3 
3  #include "Tsparse.h"  #include "Tsparse.h"
4  #include "chm_common.h"  #include "chm_common.h"
5    
6    /** "Cheap" C version of  Csparse_validate() - *not* sorting : */
7    Rboolean isValid_Csparse(SEXP x)
8    {
9        /* NB: we do *NOT* check a potential 'x' slot here, at all */
10        SEXP pslot = GET_SLOT(x, Matrix_pSym),
11            islot = GET_SLOT(x, Matrix_iSym);
12        int *dims = INTEGER(GET_SLOT(x, Matrix_DimSym)), j,
13            nrow = dims[0],
14            ncol = dims[1],
15            *xp = INTEGER(pslot),
16            *xi = INTEGER(islot);
17    
18        if (length(pslot) != dims[1] + 1)
19            return FALSE;
20        if (xp[0] != 0)
21            return FALSE;
22        if (length(islot) < xp[ncol]) /* allow larger slots from over-allocation!*/
23            return FALSE;
24        for (j = 0; j < xp[ncol]; j++) {
25            if (xi[j] < 0 || xi[j] >= nrow)
26                return FALSE;
27        }
28        for (j = 0; j < ncol; j++) {
29            if (xp[j] > xp[j + 1])
30                return FALSE;
31        }
32        return TRUE;
33    }
34    
35  SEXP Csparse_validate(SEXP x)  SEXP Csparse_validate(SEXP x)
36  {  {
37      /* NB: we do *NOT* check a potential 'x' slot here, at all */      /* NB: we do *NOT* check a potential 'x' slot here, at all */

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