4LIB
A Utility Library for Logical Variables

L4LIB is a FORTRAN90 library which contains many utility routines for "L4" or "one byte logical" arithmetic.

Licensing:

The computer code and data files made available on this web page are distributed under the GNU LGPL license.

Languages:

L4LIB is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Programs:

C4LIB, a FORTRAN90 library which implements certain elementary functions for single precision complex (C4) variables.

C8LIB, a FORTRAN90 library which implements certain elementary functions for "C8" or double precision complex variables;

I4LIB, a FORTRAN90 library which contains many utility routines, using "I4" or "4 byte integer" arithmetic.

R8LIB, a FORTRAN90 library which contains many utility routines, using "R8" or "double precision real" arithmetic.

SUBPAK, a FORTRAN90 library which contains many utility routines;

Source Code:

• l4lib.f90, the source code.

Examples and Tests:

• l4lib_test.f90, a sample calling program.
• l4lib_test.txt, the output file.

List of Routines:

• I4_TO_L4 converts an I4 to an L4.
• I4_TO_L4VEC converts an I4 into an L4VEC.
• L4_TO_I4 converts an L4 to an I4.
• L4_UNIFORM returns a pseudorandom L4.
• L4_XOR returns the exclusive OR of two L4's.
• L4MAT_PRINT prints an L4MAT.
• L4MAT_PRINT_SOME prints some of an L4MAT.
• L4MAT_TRANSPOSE_PRINT prints an L4MAT, transposed.
• L4MAT_TRANSPOSE_PRINT_SOME prints some of an L4MAT, transposed.
• L4MAT_UNIFORM returns a pseudorandom L4MAT.
• L4VEC_NEXT generates the next logical vector.
• L4VEC_PRINT prints an L4VEC.
• L4VEC_PRINT_SOME prints "some" of an L4VEC.
• L4VEC_UNIFORM returns a pseudorandom L4VEC.
• S_TO_L4 reads a logical value from a string.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

You can go up one level to the FORTRAN90 source codes.