001: /*
002:  * cblas_dtbsv.c
003:  * The program is a C interface to dtbsv.
004:  *
005:  * Keita Teranishi  5/20/98
006:  *
007:  */
008: #include "cblas.h"
009: #include "cblas_f77.h"
010: void cblas_dtbsv(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
011:                  const enum CBLAS_TRANSPOSE TransA, const enum CBLAS_DIAG Diag,
012:                  const int N, const int K, const double  *A, const int lda,
013:                  double  *X, const int incX)
014: {
015:    char TA;
016:    char UL;
017:    char DI;
018: #ifdef F77_CHAR
019:    F77_CHAR F77_TA, F77_UL, F77_DI;
020: #else
021:    #define F77_TA &TA
022:    #define F77_UL &UL
023:    #define F77_DI &DI
024: #endif
025: #ifdef F77_INT
026:    F77_INT F77_N=N, F77_lda=lda, F77_K=K, F77_incX=incX;
027: #else
028:    #define F77_N N
029:    #define F77_K K
030:    #define F77_lda lda
031:    #define F77_incX incX
032: #endif
033:    extern int CBLAS_CallFromC;
034:    extern int RowMajorStrg;
035:    RowMajorStrg = 0;
036: 
037:    CBLAS_CallFromC = 1;
038:    if (order == CblasColMajor)
039:    {
040:       if (Uplo == CblasUpper) UL = 'U';
041:       else if (Uplo == CblasLower) UL = 'L';
042:       else
043:       {
044:          cblas_xerbla(2, "cblas_dtbsv","Illegal Uplo setting, %d\n", Uplo);
045:          CBLAS_CallFromC = 0;
046:          RowMajorStrg = 0;
047:          return;
048:       }
049:       if (TransA == CblasNoTrans) TA = 'N';
050:       else if (TransA == CblasTrans) TA = 'T';
051:       else if (TransA == CblasConjTrans) TA = 'C';
052:       else
053:       {
054:          cblas_xerbla(3, "cblas_dtbsv","Illegal TransA setting, %d\n", TransA);
055:          CBLAS_CallFromC = 0;
056:          RowMajorStrg = 0;
057:          return;
058:       }
059:       if (Diag == CblasUnit) DI = 'U';
060:       else if (Diag == CblasNonUnit) DI = 'N';
061:       else
062:       {
063:          cblas_xerbla(4, "cblas_dtbsv","Illegal Diag setting, %d\n", Diag);
064:          CBLAS_CallFromC = 0;
065:          RowMajorStrg = 0;
066:          return;
067:       }
068:       #ifdef F77_CHAR
069:          F77_UL = C2F_CHAR(&UL);
070:          F77_TA = C2F_CHAR(&TA);
071:          F77_DI = C2F_CHAR(&DI);
072:       #endif
073:       F77_dtbsv( F77_UL, F77_TA, F77_DI, &F77_N, &F77_K, A, &F77_lda, X,
074:                       &F77_incX);
075:    }
076:    else if (order == CblasRowMajor)
077:    {
078:       RowMajorStrg = 1;
079:       if (Uplo == CblasUpper) UL = 'L';
080:       else if (Uplo == CblasLower) UL = 'U';
081:       else
082:       {
083:          cblas_xerbla(2, "cblas_dtbsv","Illegal Uplo setting, %d\n", Uplo);
084:          CBLAS_CallFromC = 0;
085:          RowMajorStrg = 0;
086:          return;
087:       }
088: 
089:       if (TransA == CblasNoTrans) TA = 'T';
090:       else if (TransA == CblasTrans) TA = 'N';
091:       else if (TransA == CblasConjTrans) TA = 'N';
092:       else
093:       {
094:          cblas_xerbla(3, "cblas_dtbsv","Illegal TransA setting, %d\n", TransA);
095:          CBLAS_CallFromC = 0;
096:          RowMajorStrg = 0;
097:          return;
098:       }
099: 
100:       if (Diag == CblasUnit) DI = 'U';
101:       else if (Diag == CblasNonUnit) DI = 'N';
102:       else
103:       {
104:          cblas_xerbla(4, "cblas_dtbsv","Illegal Diag setting, %d\n", Diag);
105:          CBLAS_CallFromC = 0;
106:          RowMajorStrg = 0;
107:          return;
108:       }
109:       #ifdef F77_CHAR
110:          F77_UL = C2F_CHAR(&UL);
111:          F77_TA = C2F_CHAR(&TA);
112:          F77_DI = C2F_CHAR(&DI);
113:       #endif
114: 
115:       F77_dtbsv( F77_UL, F77_TA, F77_DI, &F77_N, &F77_K, A, &F77_lda, X,
116:                       &F77_incX);
117:    }
118:    else cblas_xerbla(1, "cblas_dtbsv", "Illegal Order setting, %d\n", order);
119:    CBLAS_CallFromC = 0;
120:    RowMajorStrg = 0;
121:    return;
122: }
123: