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#include "rb_lapack.h"
extern real slansp_(char* norm, char* uplo, integer* n, real* ap, real* work);
static VALUE
rblapack_slansp(int argc, VALUE *argv, VALUE self){
VALUE rblapack_norm;
char norm;
VALUE rblapack_uplo;
char uplo;
VALUE rblapack_n;
integer n;
VALUE rblapack_ap;
real *ap;
VALUE rblapack___out__;
real __out__;
real *work;
integer lwork;
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 __out__ = NumRu::Lapack.slansp( norm, uplo, n, ap, [:usage => usage, :help => help])\n\n\nFORTRAN MANUAL\n REAL FUNCTION SLANSP( NORM, UPLO, N, AP, WORK )\n\n* Purpose\n* =======\n*\n* SLANSP returns the value of the one norm, or the Frobenius norm, or\n* the infinity norm, or the element of largest absolute value of a\n* real symmetric matrix A, supplied in packed form.\n*\n* Description\n* ===========\n*\n* SLANSP returns the value\n*\n* SLANSP = ( max(abs(A(i,j))), NORM = 'M' or 'm'\n* (\n* ( norm1(A), NORM = '1', 'O' or 'o'\n* (\n* ( normI(A), NORM = 'I' or 'i'\n* (\n* ( normF(A), NORM = 'F', 'f', 'E' or 'e'\n*\n* where norm1 denotes the one norm of a matrix (maximum column sum),\n* normI denotes the infinity norm of a matrix (maximum row sum) and\n* normF denotes the Frobenius norm of a matrix (square root of sum of\n* squares). Note that max(abs(A(i,j))) is not a consistent matrix norm.\n*\n\n* Arguments\n* =========\n*\n* NORM (input) CHARACTER*1\n* Specifies the value to be returned in SLANSP as described\n* above.\n*\n* UPLO (input) CHARACTER*1\n* Specifies whether the upper or lower triangular part of the\n* symmetric matrix A is supplied.\n* = 'U': Upper triangular part of A is supplied\n* = 'L': Lower triangular part of A is supplied\n*\n* N (input) INTEGER\n* The order of the matrix A. N >= 0. When N = 0, SLANSP is\n* set to zero.\n*\n* AP (input) REAL array, dimension (N*(N+1)/2)\n* The upper or lower triangle of the symmetric matrix A, packed\n* columnwise in a linear array. The j-th column of A is stored\n* in the array AP as follows:\n* if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;\n* if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.\n*\n* WORK (workspace) REAL array, dimension (MAX(1,LWORK)),\n* where LWORK >= N when NORM = 'I' or '1' or 'O'; otherwise,\n* WORK is not referenced.\n*\n\n* =====================================================================\n*\n\n");
return Qnil;
}
if (rb_hash_aref(rblapack_options, sUsage) == Qtrue) {
printf("%s\n", "USAGE:\n __out__ = NumRu::Lapack.slansp( norm, uplo, n, ap, [:usage => usage, :help => help])\n");
return Qnil;
}
} else
rblapack_options = Qnil;
if (argc != 4 && argc != 4)
rb_raise(rb_eArgError,"wrong number of arguments (%d for 4)", argc);
rblapack_norm = argv[0];
rblapack_uplo = argv[1];
rblapack_n = argv[2];
rblapack_ap = argv[3];
if (argc == 4) {
} else if (rblapack_options != Qnil) {
} else {
}
norm = StringValueCStr(rblapack_norm)[0];
n = NUM2INT(rblapack_n);
lwork = ((lsame_(&norm,"I")) || ((('1') || ('o')))) ? n : 0;
uplo = StringValueCStr(rblapack_uplo)[0];
if (!NA_IsNArray(rblapack_ap))
rb_raise(rb_eArgError, "ap (4th argument) must be NArray");
if (NA_RANK(rblapack_ap) != 1)
rb_raise(rb_eArgError, "rank of ap (4th argument) must be %d", 1);
if (NA_SHAPE0(rblapack_ap) != (n*(n+1)/2))
rb_raise(rb_eRuntimeError, "shape 0 of ap must be %d", n*(n+1)/2);
if (NA_TYPE(rblapack_ap) != NA_SFLOAT)
rblapack_ap = na_change_type(rblapack_ap, NA_SFLOAT);
ap = NA_PTR_TYPE(rblapack_ap, real*);
work = ALLOC_N(real, (MAX(1,lwork)));
__out__ = slansp_(&norm, &uplo, &n, ap, work);
free(work);
rblapack___out__ = rb_float_new((double)__out__);
return rblapack___out__;
}
void
init_lapack_slansp(VALUE mLapack, VALUE sH, VALUE sU, VALUE zero){
sHelp = sH;
sUsage = sU;
rblapack_ZERO = zero;
rb_define_module_function(mLapack, "slansp", rblapack_slansp, -1);
}
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