swiftnav: cblas_dspr2.c Source File

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00001 /*
00002  * cblas_dspr2.c
00003  * The program is a C interface to dspr2.
00004  *
00005  * Keita Teranishi  5/20/98
00006  *
00007  */
00008 #include "cblas.h"
00009 #include "cblas_f77.h"
00010 void cblas_dspr2(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
00011                 const int N, const double  alpha, const double  *X,
00012                 const int incX, const double  *Y, const int incY, double  *A)
00013 {
00014    char UL;
00015 #ifdef F77_CHAR
00016    F77_CHAR F77_UL;
00017 #else
00018    #define F77_UL &UL
00019 #endif
00020 
00021 #ifdef F77_INT
00022    F77_INT F77_N=N, F77_incX=incX, F77_incY=incY;
00023 #else
00024    #define F77_N N
00025    #define F77_incX incX
00026    #define F77_incY incY
00027 #endif
00028 
00029    extern int CBLAS_CallFromC;
00030    extern int RowMajorStrg;
00031    RowMajorStrg = 0;
00032    CBLAS_CallFromC = 1;
00033    if (order == CblasColMajor)
00034    {
00035       if (Uplo == CblasLower) UL = 'L';
00036       else if (Uplo == CblasUpper) UL = 'U';
00037       else 
00038       {
00039          cblas_xerbla(2, "cblas_dspr2","Illegal Uplo setting, %d\n",Uplo );
00040          CBLAS_CallFromC = 0;
00041          RowMajorStrg = 0;
00042          return;
00043       }
00044       #ifdef F77_CHAR
00045          F77_UL = C2F_CHAR(&UL);
00046       #endif
00047 
00048       F77_dspr2(F77_UL, &F77_N, &alpha, X, &F77_incX, Y, &F77_incY, A);
00049 
00050    }  else if (order == CblasRowMajor) 
00051    {
00052       RowMajorStrg = 1;
00053       if (Uplo == CblasLower) UL = 'U';
00054       else if (Uplo == CblasUpper) UL = 'L';
00055       else 
00056       {
00057          cblas_xerbla(2, "cblas_dspr2","Illegal Uplo setting, %d\n",Uplo );
00058          CBLAS_CallFromC = 0;
00059          RowMajorStrg = 0;
00060          return;
00061       }
00062       #ifdef F77_CHAR
00063          F77_UL = C2F_CHAR(&UL);
00064       #endif  
00065       F77_dspr2(F77_UL, &F77_N, &alpha, X, &F77_incX, Y, &F77_incY,  A); 
00066    } else cblas_xerbla(1, "cblas_dspr2", "Illegal Order setting, %d\n", order);
00067    CBLAS_CallFromC = 0;
00068    RowMajorStrg = 0;
00069    return;
00070 }