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#include "rb_lapack.h"
extern VOID slaswp_(integer* n, real* a, integer* lda, integer* k1, integer* k2, integer* ipiv, integer* incx);
static VALUE
rblapack_slaswp(int argc, VALUE *argv, VALUE self){
VALUE rblapack_a;
real *a;
VALUE rblapack_k1;
integer k1;
VALUE rblapack_k2;
integer k2;
VALUE rblapack_ipiv;
integer *ipiv;
VALUE rblapack_incx;
integer incx;
VALUE rblapack_a_out__;
real *a_out__;
integer lda;
integer n;
VALUE rblapack_options;
if (argc > 0 && TYPE(argv[argc-1]) == T_HASH) {
argc--;
rblapack_options = argv[argc];
if (rb_hash_aref(rblapack_options, sHelp) == Qtrue) {
printf("%s\n", "USAGE:\n a = NumRu::Lapack.slaswp( a, k1, k2, ipiv, incx, [:usage => usage, :help => help])\n\n\nFORTRAN MANUAL\n SUBROUTINE SLASWP( N, A, LDA, K1, K2, IPIV, INCX )\n\n* Purpose\n* =======\n*\n* SLASWP performs a series of row interchanges on the matrix A.\n* One row interchange is initiated for each of rows K1 through K2 of A.\n*\n\n* Arguments\n* =========\n*\n* N (input) INTEGER\n* The number of columns of the matrix A.\n*\n* A (input/output) REAL array, dimension (LDA,N)\n* On entry, the matrix of column dimension N to which the row\n* interchanges will be applied.\n* On exit, the permuted matrix.\n*\n* LDA (input) INTEGER\n* The leading dimension of the array A.\n*\n* K1 (input) INTEGER\n* The first element of IPIV for which a row interchange will\n* be done.\n*\n* K2 (input) INTEGER\n* The last element of IPIV for which a row interchange will\n* be done.\n*\n* IPIV (input) INTEGER array, dimension (K2*abs(INCX))\n* The vector of pivot indices. Only the elements in positions\n* K1 through K2 of IPIV are accessed.\n* IPIV(K) = L implies rows K and L are to be interchanged.\n*\n* INCX (input) INTEGER\n* The increment between successive values of IPIV. If IPIV\n* is negative, the pivots are applied in reverse order.\n*\n\n* Further Details\n* ===============\n*\n* Modified by\n* R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA\n*\n* =====================================================================\n*\n* .. Local Scalars ..\n INTEGER I, I1, I2, INC, IP, IX, IX0, J, K, N32\n REAL TEMP\n* ..\n\n");
return Qnil;
}
if (rb_hash_aref(rblapack_options, sUsage) == Qtrue) {
printf("%s\n", "USAGE:\n a = NumRu::Lapack.slaswp( a, k1, k2, ipiv, incx, [:usage => usage, :help => help])\n");
return Qnil;
}
} else
rblapack_options = Qnil;
if (argc != 5 && argc != 5)
rb_raise(rb_eArgError,"wrong number of arguments (%d for 5)", argc);
rblapack_a = argv[0];
rblapack_k1 = argv[1];
rblapack_k2 = argv[2];
rblapack_ipiv = argv[3];
rblapack_incx = argv[4];
if (argc == 5) {
} else if (rblapack_options != Qnil) {
} else {
}
if (!NA_IsNArray(rblapack_a))
rb_raise(rb_eArgError, "a (1th argument) must be NArray");
if (NA_RANK(rblapack_a) != 2)
rb_raise(rb_eArgError, "rank of a (1th argument) must be %d", 2);
lda = NA_SHAPE0(rblapack_a);
n = NA_SHAPE1(rblapack_a);
if (NA_TYPE(rblapack_a) != NA_SFLOAT)
rblapack_a = na_change_type(rblapack_a, NA_SFLOAT);
a = NA_PTR_TYPE(rblapack_a, real*);
k2 = NUM2INT(rblapack_k2);
incx = NUM2INT(rblapack_incx);
k1 = NUM2INT(rblapack_k1);
if (!NA_IsNArray(rblapack_ipiv))
rb_raise(rb_eArgError, "ipiv (4th argument) must be NArray");
if (NA_RANK(rblapack_ipiv) != 1)
rb_raise(rb_eArgError, "rank of ipiv (4th argument) must be %d", 1);
if (NA_SHAPE0(rblapack_ipiv) != (k2*abs(incx)))
rb_raise(rb_eRuntimeError, "shape 0 of ipiv must be %d", k2*abs(incx));
if (NA_TYPE(rblapack_ipiv) != NA_LINT)
rblapack_ipiv = na_change_type(rblapack_ipiv, NA_LINT);
ipiv = NA_PTR_TYPE(rblapack_ipiv, integer*);
{
na_shape_t shape[2];
shape[0] = lda;
shape[1] = n;
rblapack_a_out__ = na_make_object(NA_SFLOAT, 2, shape, cNArray);
}
a_out__ = NA_PTR_TYPE(rblapack_a_out__, real*);
MEMCPY(a_out__, a, real, NA_TOTAL(rblapack_a));
rblapack_a = rblapack_a_out__;
a = a_out__;
slaswp_(&n, a, &lda, &k1, &k2, ipiv, &incx);
return rblapack_a;
}
void
init_lapack_slaswp(VALUE mLapack, VALUE sH, VALUE sU, VALUE zero){
sHelp = sH;
sUsage = sU;
rblapack_ZERO = zero;
rb_define_module_function(mLapack, "slaswp", rblapack_slaswp, -1);
}
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