chrpak

chrpak, a Fortran90 code which handles characters and strings.

The code began when I simply wanted to be able to capitalize a string. Now it has expanded to a number of interesting uses. Many unusual situations are provided for, including

• string '31.2' <=> numeric value 31.2;
• uppercase <=> lowercase;
• removal of control characters or blanks;
• sorting, merging, searching.

Many of the routine names begin with the name of the data type they operate on:

• B4 - a 4 byte word;
• CH - a character;
• CHVEC - a vector of characters;
• DEC - a decimal fraction;
• DIGIT - a character representing a numeric digit;
• I4 - an integer ( kind = 4 );
• R4 - a real ( kind = 4 );
• R8 - a real ( kind = 8 );
• RAT - a ratio I/J;
• S - a string;
• SVEC - a vector of strings;
• SVECI - a vector of strings, implicitly capitalized;

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

chrpak is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Software and Data:

chrpak_test

caesar, a Fortran90 code which can apply a Caesar Shift Cipher to a string of text.

rot13, a Fortran90 code which can encipher a string using the ROT13 cipher for letters, and the ROT5 cipher for digits.

Source Code:

• chrpak.f90, the source code;
• chrpak.sh, compiles the source code;