jburkardt

FILUM\ File Utilities {#filum-file-utilities align=”center”} ==============

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FILUM is a C++ library which handles information in text files.

The original version of this library used the C representation of strings as pointers to characters. The library is being updated to use the C++ string data type.

Licensing: {#licensing align=”center”}

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

Languages: {#languages align=”center”}

FILUM is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a Mathematica version and a MATLAB version and a Python version.

Related Data and Programs: {#related-data-and-programs align=”center”}

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

CRRM, a C++ program which reads a text file and removes the carriage return character.

DEBLANK, a C++ program which reads a text file and writes a copy which has 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;

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

REFORMAT, a FORTRAN90 program which makes a copy of a file with a given number of “words” per 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.

Reference: {#reference align=”center”}

1. Tom Christiansen, Nathan Torkington,\ “8.6: Picking a Random Line from a File”,\ Perl Cookbook, pages 284-285,\ O’Reilly, 1999.

Source Code: {#source-code align=”center”}

• filum.cpp, the source code;
• filum.hpp, the include file;

Examples and Tests: {#examples-and-tests align=”center”}

• filum_prb.cpp, the calling program;
• filum_prb_output.txt, the output file.

Files used for some of the tests include:

• filum_prb_4by5.txt, a file with missing right parentheses.
• filum_prb_test.txt, a sample file.
• filum_prb_append.txt, an example of FILE_APPEND.
• filum_prb_braces.txt, a file with balanced and legal braces.
• filum_prb_columns.txt, a file of 4 rows and 5 columns of numeric data.
• filum_prb_copy.txt, an example of FILE_COPY.
• filum_prb_reverse_columns.txt, an example of FILE_REVERSE_COLUMNS.
• filum_prb_parens1.txt, a file with missing right parentheses.
• filum_prb_parens2.txt, a file with illegally occurring right parentheses.
• filum_prb_parens3.txt, a file with balanced and legal parentheses.
• filum_prb_reverse_rows.txt, an example of FILE_REVERSE_ROWS.
• story.txt, a file containing a title line and 5 paragraphs of text.

DATA_***.TXT is a short sequence of three files, each having 8 data items, 3 on the first line, 3 on the second, and 2 on the third line, to be examined by FILE_SEQUENCE_SIZE.

• data_100.txt, the first file in a sequence of 3.
• data_101.txt, the second file in a sequence of 3.
• data_102.txt, the third file in a sequence of 3.

List of Routines: {#list-of-routines align=”center”}

• CH_CAP capitalizes a single character.
• CH_EQI is true if two characters are equal, disregarding case.
• CH_IS_DIGIT returns TRUE if a character is a decimal digit.
• CH_LOW lowercases a single character.
• CH_TO_DIGIT returns the integer value of a base 10 digit.
• CH_TO_ROT13 converts a character to its ROT13 equivalent.
• DIGIT_INC increments a decimal digit.
• DIGIT_TO_CH returns the base 10 digit character corresponding to a digit.
• FILE_CHAR_COUNT counts the number of characters in a file.
• FILE_COLUMN_COUNT counts the columns in the first line of a file.
• FILE_DELETE deletes a named file if it exists.
• FILE_EXIST reports whether a file exists.
• FILE_LINE_UNIFORM returns a random line from a file.
• FILE_LINE_WIDTH reports the length of the longest line in a file.
• FILE_PARA_COUNT counts the number of paragraphs in a file.
• FILE_ROW_COUNT counts the number of row records in a file.
• FILE_SEQUENCE_DELETE deletes a file sequence.
• FILE_SEQUENCE_SIZE sizes a file sequence.
• FILE_WORD_COUNT counts the number of words in a file.
• FILENAME_DEC decrements a partially numeric file name.
• FILENAME_EXT_GET determines the “extension” of a file name.
• FILENAME_EXT_SWAP replaces the current “extension” of a file name.
• FILENAME_INC increments a partially numeric file name.
• FILENAME_INC_NOWRAP increments a partially numeric file name.
• I4_MAX returns the maximum of two I4’s.
• I4_MIN returns the smaller of two I4’s.
• I4_UNIFORM returns a scaled pseudorandom I4.
• NUMBER_INC increments the integer represented by a string.
• R4_ABS returns the absolute value of an R4.
• R4_NINT returns the nearest integer to an R4.
• R8_NINT returns the nearest integer to an R8.
• R8_UNIFORM_01 returns a unit pseudorandom R8.
• S_EQI reports whether two strings are equal, ignoring case.
• S_LEN_TRIM returns the length of a string to the last nonblank.
• S_LOW lowercases a string.
• S_REVERSE reverses the characters in a string.
• S_TO_I4 reads an I4 from a string.
• S_TO_I4VEC reads an I4VEC from a string.
• S_TO_R8 reads an R8 from a string.
• S_TO_R8VEC reads an R8VEC from a string.
• S_TO_ROT13 “rotates” the characters in a string by 13 positions.
• S_WORD_COUNT counts the number of “words” in a string.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

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

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Last revised on 22 November 2011.