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based on an earlier version of the Wolfram Language.
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MathLink C Function


int MLGetReal64Array(MLINK link, double **a, int** dims, char ***heads, int *d)
gets an array of double-precision floating-point numbers from the MathLink connection specified by link, storing the array in a, its dimensions in dims and its depth in d.
  • The array a is laid out in memory like a C array declared as double a[m][n]....
  • heads gives a list of character strings corresponding to the names of symbols that appear as heads at each level in the array.
  • MLGetReal64Array() allocates memory which must be released by calling MLReleaseReal64Array(). If MLGetReal64Array() fails and the function's return value indicates an error, do not call MLReleaseReal64Array() on the contents of a.
  • MLGetReal64Array() returns immutable data.
  • MLGetReal64Array() returns 0 in the event of an error, and a nonzero value if the function succeeds.
  • Use MLError() to retrieve the error code if MLGetReal64Array() fails.
  • MLGetReal64Array() is declared in the MathLink header file mathlink.h.
#include "mathlink.h"

/* read an array of double-precision floating-point numbers from a link */

void f(MLINK lp)
    double *data;
    int *dims;
    char **heads;
    int d; /* stores the rank of the array */

    if(! MLGetReal64Array(lp, &data, &dims, &heads, &d))
            /* unable to read the array from lp */

    /* ... */

    MLReleaseReal64Array(lp, data, dims, heads, d);