# dlib C++ Library - cblas_dsyr2.c

    /*
     *
     * cblas_dsyr2.c
     * This program is a C interface to dsyr2.
     * Written by Keita Teranishi
     * 4/6/1998
     *
     */

    #include "cblas.h"
    #include "cblas_f77.h"
    void cblas_dsyr2(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
                    const CBLAS_INT_TYPE N, const double  alpha, const double  *X,
                    const CBLAS_INT_TYPE incX, const double  *Y, const CBLAS_INT_TYPE incY, double  *A,
                    const CBLAS_INT_TYPE lda)
    {
       char UL;
    #ifdef F77_CHAR
       F77_CHAR F77_UL;
    #else
       #define F77_UL &UL
    #endif

    #ifdef F77_INT
       F77_INT F77_N=N, F77_incX=incX, F77_incY=incY, F77_lda=lda;
    #else
       #define F77_N N
       #define F77_incX incX
       #define F77_incY incY
       #define F77_lda  lda
    #endif

       if (order == CblasColMajor)
       {
          if (Uplo == CblasLower) UL = 'L';
          else if (Uplo == CblasUpper) UL = 'U';
          else
          {
             cblas_xerbla(2, "cblas_dsyr2","Illegal Uplo setting, %d\n",Uplo );
             return;
          }
          #ifdef F77_CHAR
             F77_UL = C2F_CHAR(&UL);
          #endif

          F77_dsyr2(F77_UL, &F77_N, &alpha, X, &F77_incX, Y, &F77_incY, A,
                        &F77_lda);

       }  else if (order == CblasRowMajor)
       {
          if (Uplo == CblasLower) UL = 'U';
          else if (Uplo == CblasUpper) UL = 'L';
          else
          {
             cblas_xerbla(2, "cblas_dsyr2","Illegal Uplo setting, %d\n",Uplo );
             return;
          }
          #ifdef F77_CHAR
             F77_UL = C2F_CHAR(&UL);
          #endif
          F77_dsyr2(F77_UL, &F77_N, &alpha, X, &F77_incX, Y, &F77_incY,  A,
                        &F77_lda);
       } else cblas_xerbla(1, "cblas_dsyr2", "Illegal Order setting, %d\n", order);
       return;
    }