CHRPAK
Characters and Strings

CHRPAK is a Python library which can handle characters and strings.

Licensing:

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

Languages:

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

Related Software and Data:

CAESAR, a Python library which can apply a Caesar Shift Cipher to a string of text.

FILE_NAME_SEQUENCE, a Python program which demonstrates ways to generate a sequence of filenames that can be used when generating images for an animation.

ROT13, a Python library which can encipher a string using the ROT13 cipher for letters, and the ROT5 cipher for digits.

Source Code:

• ch_cap.py, capitalizes a character.
• ch_is_digit.py is TRUE if a character is a digit.
• ch_is_isbn_digit.py is TRUE if a character is an ISBN digit.
• ch_to_digit.py converts a character to a digit;
• ch_to_rot13.m, converts a character to its ROT13 encoding;
• digit_to_ch.py, converts a digit to a character;
• i4_length.py, computes the number of characters needed to print an I4.
• i4_to_isbn_digit.py, converts an I4 between 0 and 10 to an ISBN digit.
• i4_uniform_ab.py, returns a scaled uniform I4 between A and B.
• i4vec_print.py, prints an I4VEC.
• isbn_digit_to_i4.py, converts an ISBN digit to a digit between 0 and 10.
• rat_to_s.py, converts a rational to a left-justified string.
• s_digits_count.py, counts the digits in a string.
• s_len_trim.m returns the length of a string to the last non-blank character;
• s_quote.m quotes a string;
• s_to_caesar.py applies a Caesar shift cipher to a string.
• s_to_digits.py, extracts the digits from a string.
• s_to_isbn_digits.py, extracts the ISBN digits from a string.
• s_to_rot13.py encodes or decodes a string using ROT13;
• timestamp.py, returns the current YMDHMS date as a timestamp.

Examples and Tests:

• chrpak_test.py, calls all the tests;
• chrpak_test.sh, runs all the tests;
• chrpak_test.txt, the output file;

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