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lammps/lib/linalg/dlacpy.cpp

47 lines
1.3 KiB
C++

#ifdef __cplusplus
extern "C" {
#endif
#include "lmp_f2c.h"
int dlacpy_(char *uplo, integer *m, integer *n, doublereal *a, integer *lda, doublereal *b,
integer *ldb, ftnlen uplo_len)
{
integer a_dim1, a_offset, b_dim1, b_offset, i__1, i__2;
integer i__, j;
extern logical lsame_(char *, char *, ftnlen, ftnlen);
a_dim1 = *lda;
a_offset = 1 + a_dim1;
a -= a_offset;
b_dim1 = *ldb;
b_offset = 1 + b_dim1;
b -= b_offset;
if (lsame_(uplo, (char *)"U", (ftnlen)1, (ftnlen)1)) {
i__1 = *n;
for (j = 1; j <= i__1; ++j) {
i__2 = min(j, *m);
for (i__ = 1; i__ <= i__2; ++i__) {
b[i__ + j * b_dim1] = a[i__ + j * a_dim1];
}
}
} else if (lsame_(uplo, (char *)"L", (ftnlen)1, (ftnlen)1)) {
i__1 = *n;
for (j = 1; j <= i__1; ++j) {
i__2 = *m;
for (i__ = j; i__ <= i__2; ++i__) {
b[i__ + j * b_dim1] = a[i__ + j * a_dim1];
}
}
} else {
i__1 = *n;
for (j = 1; j <= i__1; ++j) {
i__2 = *m;
for (i__ = 1; i__ <= i__2; ++i__) {
b[i__ + j * b_dim1] = a[i__ + j * a_dim1];
}
}
}
return 0;
}
#ifdef __cplusplus
}
#endif