CR2LF
Convert Carriage Returns to Line Feeds

CR2LF is a C++ program which converts carriage returns to linefeeds.

I constantly run into problems, when transferring a file from one system to another, involving different conventions for ending a line of text.

It is my understanding that the following "conventions" apply:

• Macintosh (pre OSX) text lines end with the CR (carriage return) character;
• PC text lines end with the CR+LF (carriage return + line feed) characters;
• UNIX text lines end with the LF (line feed) character;

While your file transfer program will usually transfer a text file in such a way that that carriage control is properly translated, this sometimes doesn't happen, especially if the text file is transferred "verbatim", that is, as though it were a binary file.

In such a case, CR2LF is the correct program to use if you want to convert a pre OSX Macintosh text file to a UNIX text file, since it will replace each occurrence of CR by LF.

Usage:

cr2lf old new

• old is the file to be modified;
• new is the modified copy of the old file.

Licensing:

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

Languages:

CR2LF is available in a C++ version.

Related Data and Programs:

CR2CRLF, a C++ program which replaces carriage returns by carriage returns + line feeds.

CRRM, a C++ program which removes all carriage returns from a file.

DEBLANK, a C++ program which makes a copy of a text file which contains no blank lines.

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

DETROFF, a C++ program which removes from a file every occurrence of the TROFF overprint pair character+backspace, which can make a MAN page printable;

FILUM, a C++ library which performs various operations on files.

LF2CR, a C++ program which replaces linefeeds by carriage returns.

LF2CRLF, a C++ program which replaces linefeeds by carriage returns + line feeds.

LFRM, a C++ program which removes all linefeeds from a file.

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

REWORD, a C++ program which reads a text file and writes a copy which has a fixed number of "words" per line.

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

WRAP, a C++ program which makes a copy of a text file in which no line is longer than a user-specified wrap length.

WRAP2, a C++ program which wraps long lines in a text file, but which wraps some lines "early", so as to avoid breaking words.

Source Code:

• cr2lf.cpp, the source code;

Examples and Tests:

• cr.txt, the input "CR" file;
• lf.txt, the output "LF" file;

List of Routines:

• MAIN is the main program for CR2LF.
• HANDLE makes a copy of a file in which CR's are replaced by LF's.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

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