    /*
     *
     * cblas_dgemv.c
     * This program is a C interface to dgemv.
     * Written by Keita Teranishi
     * 4/6/1998
     *
     */
    #include "cblas.h"
    #include "cblas_f77.h"
    void cblas_dgemv(const enum CBLAS_ORDER order,
                     const enum CBLAS_TRANSPOSE TransA, const int M, const int N,
                     const double alpha, const double  *A, const int lda,
                     const double  *X, const int incX, const double beta,
                     double  *Y, const int incY)
    {
       char TA;
    #ifdef F77_CHAR
       F77_CHAR F77_TA;
    #else
       #define F77_TA &TA
    #endif
    #ifdef F77_INT
       F77_INT F77_M=M, F77_N=N, F77_lda=lda, F77_incX=incX, F77_incY=incY;
    #else
       #define F77_M M
       #define F77_N N
       #define F77_lda lda
       #define F77_incX incX
       #define F77_incY incY
    #endif

       if (order == CblasColMajor)
       {
          if (TransA == CblasNoTrans) TA = 'N';
          else if (TransA == CblasTrans) TA = 'T';
          else if (TransA == CblasConjTrans) TA = 'C';
          else
          {
             cblas_xerbla(2, "cblas_dgemv","Illegal TransA setting, %d\n", TransA);
             return;
          }
          #ifdef F77_CHAR
             F77_TA = C2F_CHAR(&TA);
          #endif
          F77_dgemv(F77_TA, &F77_M, &F77_N, &alpha, A, &F77_lda, X, &F77_incX,
                    &beta, Y, &F77_incY);
       }
       else if (order == CblasRowMajor)
       {
          if (TransA == CblasNoTrans) TA = 'T';
          else if (TransA == CblasTrans) TA = 'N';
          else if (TransA == CblasConjTrans) TA = 'N';
          else
          {
             cblas_xerbla(2, "cblas_dgemv","Illegal TransA setting, %d\n", TransA);
             return;
          }
          #ifdef F77_CHAR
             F77_TA = C2F_CHAR(&TA);
          #endif
          F77_dgemv(F77_TA, &F77_N, &F77_M, &alpha, A, &F77_lda, X,
                    &F77_incX, &beta, Y, &F77_incY);
       }
       else cblas_xerbla(1, "cblas_dgemv", "Illegal Order setting, %d\n", order);
       return;
    }