66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
#ifdef __cplusplus
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extern "C" {
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#endif
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#include "lmp_f2c.h"
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static integer c__1 = 1;
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static doublereal c_b12 = 1.;
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static integer c_n1 = -1;
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int dgetrs_(char *trans, integer *n, integer *nrhs, doublereal *a, integer *lda, integer *ipiv,
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doublereal *b, integer *ldb, integer *info, ftnlen trans_len)
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{
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integer a_dim1, a_offset, b_dim1, b_offset, i__1;
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extern logical lsame_(char *, char *, ftnlen, ftnlen);
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extern int dtrsm_(char *, char *, char *, char *, integer *, integer *, doublereal *,
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doublereal *, integer *, doublereal *, integer *, ftnlen, ftnlen, ftnlen,
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ftnlen),
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xerbla_(char *, integer *, ftnlen),
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dlaswp_(integer *, doublereal *, integer *, integer *, integer *, integer *, integer *);
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logical notran;
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a_dim1 = *lda;
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a_offset = 1 + a_dim1;
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a -= a_offset;
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--ipiv;
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b_dim1 = *ldb;
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b_offset = 1 + b_dim1;
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b -= b_offset;
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*info = 0;
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notran = lsame_(trans, (char *)"N", (ftnlen)1, (ftnlen)1);
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if (!notran && !lsame_(trans, (char *)"T", (ftnlen)1, (ftnlen)1) &&
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!lsame_(trans, (char *)"C", (ftnlen)1, (ftnlen)1)) {
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*info = -1;
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} else if (*n < 0) {
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*info = -2;
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} else if (*nrhs < 0) {
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*info = -3;
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} else if (*lda < max(1, *n)) {
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*info = -5;
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} else if (*ldb < max(1, *n)) {
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*info = -8;
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}
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if (*info != 0) {
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i__1 = -(*info);
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xerbla_((char *)"DGETRS", &i__1, (ftnlen)6);
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return 0;
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}
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if (*n == 0 || *nrhs == 0) {
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return 0;
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}
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if (notran) {
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dlaswp_(nrhs, &b[b_offset], ldb, &c__1, n, &ipiv[1], &c__1);
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dtrsm_((char *)"L", (char *)"L", (char *)"N", (char *)"U", n, nrhs, &c_b12, &a[a_offset], lda, &b[b_offset], ldb, (ftnlen)1,
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(ftnlen)1, (ftnlen)1, (ftnlen)1);
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dtrsm_((char *)"L", (char *)"U", (char *)"N", (char *)"N", n, nrhs, &c_b12, &a[a_offset], lda, &b[b_offset], ldb, (ftnlen)1,
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(ftnlen)1, (ftnlen)1, (ftnlen)1);
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} else {
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dtrsm_((char *)"L", (char *)"U", (char *)"T", (char *)"N", n, nrhs, &c_b12, &a[a_offset], lda, &b[b_offset], ldb, (ftnlen)1,
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(ftnlen)1, (ftnlen)1, (ftnlen)1);
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dtrsm_((char *)"L", (char *)"L", (char *)"T", (char *)"U", n, nrhs, &c_b12, &a[a_offset], lda, &b[b_offset], ldb, (ftnlen)1,
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(ftnlen)1, (ftnlen)1, (ftnlen)1);
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dlaswp_(nrhs, &b[b_offset], ldb, &c__1, n, &ipiv[1], &c_n1);
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}
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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