#include "rb_lapack.h"

extern doublereal zla_porcond_x_(char* uplo, integer* n, doublecomplex* a, integer* lda, doublecomplex* af, integer* ldaf, doublecomplex* x, integer* info, doublecomplex* work, doublereal* rwork);


static VALUE
rblapack_zla_porcond_x(int argc, VALUE *argv, VALUE self){
  VALUE rblapack_uplo;
  char uplo; 
  VALUE rblapack_a;
  doublecomplex *a; 
  VALUE rblapack_af;
  doublecomplex *af; 
  VALUE rblapack_x;
  doublecomplex *x; 
  VALUE rblapack_work;
  doublecomplex *work; 
  VALUE rblapack_rwork;
  doublereal *rwork; 
  VALUE rblapack_info;
  integer info; 
  VALUE rblapack___out__;
  doublereal __out__; 

  integer lda;
  integer n;
  integer ldaf;

  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  info, __out__ = NumRu::Lapack.zla_porcond_x( uplo, a, af, x, work, rwork, [:usage => usage, :help => help])\n\n\nFORTRAN MANUAL\n      DOUBLE PRECISION FUNCTION ZLA_PORCOND_X( UPLO, N, A, LDA, AF, LDAF, X, INFO, WORK, RWORK )\n\n*  Purpose\n*  =======\n*\n*     ZLA_PORCOND_X Computes the infinity norm condition number of\n*     op(A) * diag(X) where X is a COMPLEX*16 vector.\n*\n\n*  Arguments\n*  =========\n*\n*     UPLO    (input) CHARACTER*1\n*       = 'U':  Upper triangle of A is stored;\n*       = 'L':  Lower triangle of A is stored.\n*\n*     N       (input) INTEGER\n*     The number of linear equations, i.e., the order of the\n*     matrix A.  N >= 0.\n*\n*     A       (input) COMPLEX*16 array, dimension (LDA,N)\n*     On entry, the N-by-N matrix A.\n*\n*     LDA     (input) INTEGER\n*     The leading dimension of the array A.  LDA >= max(1,N).\n*\n*     AF      (input) COMPLEX*16 array, dimension (LDAF,N)\n*     The triangular factor U or L from the Cholesky factorization\n*     A = U**T*U or A = L*L**T, as computed by ZPOTRF.\n*\n*     LDAF    (input) INTEGER\n*     The leading dimension of the array AF.  LDAF >= max(1,N).\n*\n*     X       (input) COMPLEX*16 array, dimension (N)\n*     The vector X in the formula op(A) * diag(X).\n*\n*     INFO    (output) INTEGER\n*       = 0:  Successful exit.\n*     i > 0:  The ith argument is invalid.\n*\n*     WORK    (input) COMPLEX*16 array, dimension (2*N).\n*     Workspace.\n*\n*     RWORK   (input) DOUBLE PRECISION array, dimension (N).\n*     Workspace.\n*\n\n*  =====================================================================\n*\n*     .. Local Scalars ..\n      INTEGER            KASE, I, J\n      DOUBLE PRECISION   AINVNM, ANORM, TMP\n      LOGICAL            UP\n      COMPLEX*16         ZDUM\n*     ..\n*     .. Local Arrays ..\n      INTEGER            ISAVE( 3 )\n*     ..\n*     .. External Functions ..\n      LOGICAL            LSAME\n      EXTERNAL           LSAME\n*     ..\n*     .. External Subroutines ..\n      EXTERNAL           ZLACN2, ZPOTRS, XERBLA\n*     ..\n*     .. Intrinsic Functions ..\n      INTRINSIC          ABS, MAX, REAL, DIMAG\n*     ..\n*     .. Statement Functions ..\n      DOUBLE PRECISION CABS1\n*     ..\n*     .. Statement Function Definitions ..\n      CABS1( ZDUM ) = ABS( DBLE( ZDUM ) ) + ABS( DIMAG( ZDUM ) )\n*     ..\n\n");
      return Qnil;
    }
    if (rb_hash_aref(rblapack_options, sUsage) == Qtrue) {
      printf("%s\n", "USAGE:\n  info, __out__ = NumRu::Lapack.zla_porcond_x( uplo, a, af, x, work, rwork, [:usage => usage, :help => help])\n");
      return Qnil;
    } 
  } else
    rblapack_options = Qnil;
  if (argc != 6 && argc != 6)
    rb_raise(rb_eArgError,"wrong number of arguments (%d for 6)", argc);
  rblapack_uplo = argv[0];
  rblapack_a = argv[1];
  rblapack_af = argv[2];
  rblapack_x = argv[3];
  rblapack_work = argv[4];
  rblapack_rwork = argv[5];
  if (argc == 6) {
  } else if (rblapack_options != Qnil) {
  } else {
  }

  uplo = StringValueCStr(rblapack_uplo)[0];
  if (!NA_IsNArray(rblapack_af))
    rb_raise(rb_eArgError, "af (3th argument) must be NArray");
  if (NA_RANK(rblapack_af) != 2)
    rb_raise(rb_eArgError, "rank of af (3th argument) must be %d", 2);
  ldaf = NA_SHAPE0(rblapack_af);
  n = NA_SHAPE1(rblapack_af);
  if (NA_TYPE(rblapack_af) != NA_DCOMPLEX)
    rblapack_af = na_change_type(rblapack_af, NA_DCOMPLEX);
  af = NA_PTR_TYPE(rblapack_af, doublecomplex*);
  if (!NA_IsNArray(rblapack_rwork))
    rb_raise(rb_eArgError, "rwork (6th argument) must be NArray");
  if (NA_RANK(rblapack_rwork) != 1)
    rb_raise(rb_eArgError, "rank of rwork (6th argument) must be %d", 1);
  if (NA_SHAPE0(rblapack_rwork) != n)
    rb_raise(rb_eRuntimeError, "shape 0 of rwork must be the same as shape 1 of af");
  if (NA_TYPE(rblapack_rwork) != NA_DFLOAT)
    rblapack_rwork = na_change_type(rblapack_rwork, NA_DFLOAT);
  rwork = NA_PTR_TYPE(rblapack_rwork, doublereal*);
  if (!NA_IsNArray(rblapack_a))
    rb_raise(rb_eArgError, "a (2th argument) must be NArray");
  if (NA_RANK(rblapack_a) != 2)
    rb_raise(rb_eArgError, "rank of a (2th argument) must be %d", 2);
  lda = NA_SHAPE0(rblapack_a);
  if (NA_SHAPE1(rblapack_a) != n)
    rb_raise(rb_eRuntimeError, "shape 1 of a must be the same as shape 1 of af");
  if (NA_TYPE(rblapack_a) != NA_DCOMPLEX)
    rblapack_a = na_change_type(rblapack_a, NA_DCOMPLEX);
  a = NA_PTR_TYPE(rblapack_a, doublecomplex*);
  if (!NA_IsNArray(rblapack_x))
    rb_raise(rb_eArgError, "x (4th argument) must be NArray");
  if (NA_RANK(rblapack_x) != 1)
    rb_raise(rb_eArgError, "rank of x (4th argument) must be %d", 1);
  if (NA_SHAPE0(rblapack_x) != n)
    rb_raise(rb_eRuntimeError, "shape 0 of x must be the same as shape 1 of af");
  if (NA_TYPE(rblapack_x) != NA_DCOMPLEX)
    rblapack_x = na_change_type(rblapack_x, NA_DCOMPLEX);
  x = NA_PTR_TYPE(rblapack_x, doublecomplex*);
  if (!NA_IsNArray(rblapack_work))
    rb_raise(rb_eArgError, "work (5th argument) must be NArray");
  if (NA_RANK(rblapack_work) != 1)
    rb_raise(rb_eArgError, "rank of work (5th argument) must be %d", 1);
  if (NA_SHAPE0(rblapack_work) != (2*n))
    rb_raise(rb_eRuntimeError, "shape 0 of work must be %d", 2*n);
  if (NA_TYPE(rblapack_work) != NA_DCOMPLEX)
    rblapack_work = na_change_type(rblapack_work, NA_DCOMPLEX);
  work = NA_PTR_TYPE(rblapack_work, doublecomplex*);

  __out__ = zla_porcond_x_(&uplo, &n, a, &lda, af, &ldaf, x, &info, work, rwork);

  rblapack_info = INT2NUM(info);
  rblapack___out__ = rb_float_new((double)__out__);
  return rb_ary_new3(2, rblapack_info, rblapack___out__);
}

void
init_lapack_zla_porcond_x(VALUE mLapack, VALUE sH, VALUE sU, VALUE zero){
  sHelp = sH;
  sUsage = sU;
  rblapack_ZERO = zero;

  rb_define_module_function(mLapack, "zla_porcond_x", rblapack_zla_porcond_x, -1);
}
