1 /* $Id: petscmath.h,v 1.10 1998/06/01 23:51:47 balay Exp balay $ */ 2 /* 3 4 PETSc mathematics include file. Defines certain basic mathematical 5 constants and functions for working with single and double precision 6 floating point numbers as well as complex and integers. 7 8 This file is included by petsc.h and should not be used directly. 9 10 */ 11 12 #if !defined(__PETSCMATH_PACKAGE) 13 #define __PETSCMATH_PACKAGE 14 #include <math.h> 15 16 /* 17 18 Defines operations that are different for complex and real numbers; 19 note that one cannot really mix the use of complex and real in the same 20 PETSc program. All PETSc objects in one program are built around the object 21 Scalar which is either always a double or a complex. 22 23 */ 24 #if defined(USE_PETSC_COMPLEX) 25 26 #if defined (PARCH_nt) 27 #include <complex> 28 #elif defined(HAVE_NONSTANDARD_COMPLEX_H) 29 #include HAVE_NONSTANDARD_COMPLEX_H 30 #else 31 #include <complex.h> 32 #endif 33 34 extern MPI_Datatype MPIU_COMPLEX; 35 #define MPIU_SCALAR MPIU_COMPLEX 36 #if defined (PARCH_nt) 37 #define PetscReal(a) (a).real() 38 #define PetscImaginary(a) (a).imag() 39 #define PetscAbsScalar(a) std::abs(a) 40 #define PetscConj(a) std::conj(a) 41 #define PetscSqrtScalar(a) std::sqrt(a) 42 #else 43 #define PetscReal(a) real(a) 44 #define PetscImaginary(a) imag(a) 45 #define PetscAbsScalar(a) abs(a) 46 #define PetscConj(a) conj(a) 47 #define PetscSqrtScalar(a) sqrt(a) 48 #endif 49 /* 50 The new complex class for GNU C++ is based on templates and is not backward 51 compatible with all previous complex class libraries. 52 */ 53 #if defined(PARCH_nt) 54 #define Scalar std::complex<double> 55 #elif defined(USES_TEMPLATED_COMPLEX) 56 #define Scalar complex<double> 57 #else 58 #define Scalar complex 59 #endif 60 61 /* Compiling for real numbers only */ 62 #else 63 #define MPIU_SCALAR MPI_DOUBLE 64 #define PetscReal(a) (a) 65 #define PetscImaginary(a) (a) 66 #define PetscAbsScalar(a) ( ((a)<0.0) ? -(a) : (a) ) 67 #define Scalar double 68 #define PetscConj(a) (a) 69 #define PetscSqrtScalar(a) sqrt(a) 70 #endif 71 72 /* --------------------------------------------------------------------------*/ 73 74 /* 75 Certain objects may be created using either single 76 or double precision. 77 */ 78 typedef enum { SCALAR_DOUBLE, SCALAR_SINGLE } ScalarPrecision; 79 80 /* PETSC_i is the imaginary number, i */ 81 extern Scalar PETSC_i; 82 83 #define PetscMin(a,b) ( ((a)<(b)) ? (a) : (b) ) 84 #define PetscMax(a,b) ( ((a)<(b)) ? (b) : (a) ) 85 #define PetscAbsInt(a) ( ((a)<0) ? -(a) : (a) ) 86 #define PetscAbsDouble(a) ( ((a)<0) ? -(a) : (a) ) 87 88 /* ----------------------------------------------------------------------------*/ 89 /* 90 Basic constants 91 */ 92 #define PETSC_PI 3.14159265358979323846264 93 #define PETSC_DEGREES_TO_RADIANS 0.01745329251994 94 #define PETSC_MAX 1.e300 95 #define PETSC_MIN -1.e300 96 #define PETSC_MAX_INT 1000000000; 97 #define PETSC_MIN_INT -1000000000; 98 99 /* ----------------------------------------------------------------------------*/ 100 /* 101 PLogDouble variables are used to contain double precision numbers 102 that are not used in the numerical computations, but rather in logging, 103 timing etc. 104 */ 105 typedef double PLogDouble; 106 /* 107 Once PETSc is compiling with a ADIC enhanced version of MPI 108 we will create a new MPI_Datatype for the inactive double variables. 109 */ 110 #if defined(AD_DERIV_H) 111 /* extern MPI_Datatype MPIU_PLOGDOUBLE; */ 112 #else 113 #if !defined(PETSC_USING_MPIUNI) 114 #define MPIU_PLOGDOUBLE MPI_DOUBLE 115 #endif 116 #endif 117 118 119 #endif 120