Copyright 2020 Fluid Numerics LLC
feqparse is an equation parser Fortran class that is used to interpret and evaluate functions provided as strings.
Learn how to contribute to this repository
For a quick installation to /usr/local/feqparse,
cd build/
cmake ../
make
sudo make install
If you'd like to run the provided tests to verify your installation,
- Navigate to the
test/directory underneath thebuild/directory.
cd test/
- Use
ctestto run the provided tests
ctest .
The above steps install
/opt/feqparse/lib/libfeqparse.a
/opt/feqparse/include/FEQParse.mod
A Fortran Package Manager manifest file is also included, so that the library and test cases can be compiled with FPM. For example:
fpm build --profile release
fpm test --profile release
To use feq-parse within your fpm project, add the following to your fpm.toml file:
[dependencies]
feq-parse = { git="https://github.com/FluidNumerics/feq-parse.git" }Or, to use a specific version:
[dependencies]
feq-parse = { git="https://github.com/FluidNumerics/feq-parse.git", tag = "v1.1.0" }Example Makefile
FC = gfortran
FLIBS += -L/opt/feqparse/lib -lfeqparse
FFLAGS += -I/opt/feqparse/include
demo : FEqParseDemo.f90
${FC} -c FEqParseDemo.f90 ${FFLAGS}
${FC} FEqParseDemo.o ${FFLAGS} ${FLIBS} -o $@
Example program
PROGRAM FEqParseDemo
USE FEQParse
IMPLICIT NONE
TYPE(EquationParser) :: f
CHARACTER(LEN=1), DIMENSION(1:3) :: independentVars
CHARACTER(LEN=30) :: eqChar
REAL :: x(1:3)
! Specify the independent variables
independentVars = (/ 'x', 'y', 'z' /)
! Specify an equation string that we want to evaluate
eqChar = 'f = exp( -(x^2 + y^2 + z^2) )'
! Create the EquationParser object
f = EquationParser(eqChar, independentVars)
! Evaluate the equation
x = (/ 0.0, 0.0, 0.0 /)
PRINT*, f % evaluate( x )
! Clean up memory
CALL f % Destruct()
END PROGRAM FEqParseDemo
- (Maintainer) Joe Schoonover, Fluid Numerics LLC
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