    /*
     *
     * cblas_cherk.c
     * This program is a C interface to cherk.
     * Written by Keita Teranishi
     * 4/8/1998
     *
     */

    #include "cblas.h"
    #include "cblas_f77.h"
    void cblas_cherk(const enum CBLAS_ORDER Order, const enum CBLAS_UPLO Uplo,
                     const enum CBLAS_TRANSPOSE Trans, const CBLAS_INT_TYPE N, const CBLAS_INT_TYPE K,
                     const float alpha, const void *A, const CBLAS_INT_TYPE lda,
                     const float beta, void *C, const CBLAS_INT_TYPE ldc)
    {
       char UL, TR;
    #ifdef F77_CHAR
       F77_CHAR F77_TR, F77_UL;
    #else
       #define F77_TR &TR
       #define F77_UL &UL
    #endif

    #ifdef F77_INT
       F77_INT F77_N=N, F77_K=K, F77_lda=lda;
       F77_INT F77_ldc=ldc;
    #else
       #define F77_N N
       #define F77_K K
       #define F77_lda lda
       #define F77_ldc ldc
    #endif

       if( Order == CblasColMajor )
       {
          if( Uplo == CblasUpper) UL='U';
          else if ( Uplo == CblasLower ) UL='L';
          else
          {
             cblas_xerbla(2, "cblas_cherk", "Illegal Uplo setting, %d\n", Uplo);
             return;
          }

          if( Trans == CblasTrans) TR ='T';
          else if ( Trans == CblasConjTrans ) TR='C';
          else if ( Trans == CblasNoTrans )   TR='N';
          else
          {
             cblas_xerbla(3, "cblas_cherk", "Illegal Trans setting, %d\n", Trans);
             return;
          }

          #ifdef F77_CHAR
             F77_UL = C2F_CHAR(&UL);
             F77_TR = C2F_CHAR(&TR);
          #endif

          F77_cherk(F77_UL, F77_TR, &F77_N, &F77_K, &alpha, A, &F77_lda,
                         &beta, C, &F77_ldc);
       } else if (Order == CblasRowMajor)
       {
          if( Uplo == CblasUpper) UL='L';
          else if ( Uplo == CblasLower ) UL='U';
          else
          {
             cblas_xerbla(3, "cblas_cherk", "Illegal Uplo setting, %d\n", Uplo);
             return;
          }
          if( Trans == CblasTrans) TR ='N';
          else if ( Trans == CblasConjTrans ) TR='N';
          else if ( Trans == CblasNoTrans )   TR='C';
          else
          {
             cblas_xerbla(3, "cblas_cherk", "Illegal Trans setting, %d\n", Trans);
             return;
          }

          #ifdef F77_CHAR
             F77_UL = C2F_CHAR(&UL);
             F77_SD = C2F_CHAR(&SD);
          #endif

          F77_cherk(F77_UL, F77_TR, &F77_N, &F77_K, &alpha, A, &F77_lda,
                    &beta, C, &F77_ldc);
       }
       else  cblas_xerbla(1, "cblas_cherk", "Illegal Order setting, %d\n", Order);
       return;
    }