WRAP2
Break Up Long Lines in a File

WRAP2 is an executable C++ program that reads a file and makes a copy in which long lines have been broken up. A line is "wrapped" if its length would exceed a given maximum. Unlike the WRAP program, this program will wrap the line before the maximum length is reached, if that will help avoid breaking up words.

Related Data and Programs:

CR2LF is a C++ program which reads a text file and replaces carriage returns by line feeds.

CRRM is a C++ program which reads a text file and writes a copy which has no carriage returns.

DEBLANK is a C++ program which makes a copy of a text file in which blank lines have been removed.

DECOMMENT is a C++ program which makes a copy of a text file which contains no "comment" lines (that begin with "#").

FILUM is a library of C++ routines for performing various operations on files.

REFORMAT is a FORTRAN90 program which reads a file that contains only real values, and writes a copy which has a fixed number of real values on each line.

REWORD is a C++ program which makes a copy of a file in which each line has the same number of "words".

UNCONTROL is a C++ program which makes a copy of a text file which contains no control characters.

WRAP is a C++ program which makes a copy of a text file in which long lines have been wrapped.

Usage:

wrap2 file1 file2 wrap_length

reads the lines of file1, writing copies of the lines to file2, breaking the lines if necessary so that they are never longer than wrap_length characters.

Source Code:

• wrap2.C, the source code;
• wrap2.csh, commands to compile and load the source code;

Examples and Tests:

• gettysburg.txt, Lincoln's Gettysburg Address, stored as a long line, a blank line, a long line, a blank line, and a very long line.
• gettysburg_80.txt, the same file, wrapped to 80 characters maximum.
• gettysburg_50.txt, the same file, wrapped to 50 characters maximum.
• gettysburg_30.txt, the same file, wrapped to 30 characters maximum.

List of Routines:

• MAIN is the main program for WRAP2.
• HANDLE makes a copy of a file in which no line exceeds a given length.
• S_LEN_TRIM returns the length of a string to the last nonblank.
• S_TO_I4 reads an integer value from a string.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

You can go up one level to the C++ source codes.