66 lines
2.1 KiB
C++
66 lines
2.1 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 doublereal c_b12 = 1.;
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int dtrtrs_(char *uplo, char *trans, char *diag, integer *n, integer *nrhs, doublereal *a,
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integer *lda, doublereal *b, integer *ldb, integer *info, ftnlen uplo_len,
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ftnlen trans_len, ftnlen diag_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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logical nounit;
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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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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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nounit = lsame_(diag, (char *)"N", (ftnlen)1, (ftnlen)1);
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if (!lsame_(uplo, (char *)"U", (ftnlen)1, (ftnlen)1) && !lsame_(uplo, (char *)"L", (ftnlen)1, (ftnlen)1)) {
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*info = -1;
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} else if (!lsame_(trans, (char *)"N", (ftnlen)1, (ftnlen)1) &&
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!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 = -2;
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} else if (!nounit && !lsame_(diag, (char *)"U", (ftnlen)1, (ftnlen)1)) {
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*info = -3;
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} else if (*n < 0) {
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*info = -4;
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} else if (*nrhs < 0) {
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*info = -5;
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} else if (*lda < max(1, *n)) {
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*info = -7;
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} else if (*ldb < max(1, *n)) {
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*info = -9;
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}
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if (*info != 0) {
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i__1 = -(*info);
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xerbla_((char *)"DTRTRS", &i__1, (ftnlen)6);
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return 0;
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}
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if (*n == 0) {
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return 0;
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}
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if (nounit) {
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i__1 = *n;
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for (*info = 1; *info <= i__1; ++(*info)) {
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if (a[*info + *info * a_dim1] == 0.) {
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return 0;
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}
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}
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}
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*info = 0;
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dtrsm_((char *)"L", uplo, trans, diag, 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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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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