FILUM - File Utilities

FILUM is a small set of utility routines for working with information in text files.

Files you may copy include:

• filum.f90, the source code;
• filum_prb.f90, the calling program;
• filprb_4by5.txt, a file with missing right parentheses.
• filprb_test.txt, a sample file.
• filprb_append.txt, an example of FILE_APPEND.
• filprb_copy.txt, an example of FILE_COPY.
• filprb_reverse_columns.txt, an example of FILE_REVERSE_COLUMNS.
• filprb_parens1.txt, a file with missing right parentheses.
• filprb_parens2.txt, a file with illegally occurring right parentheses.
• filprb_parens3.txt, a file with balanced and legal parentheses.
• filprb_reverse_rows.txt, an example of FILE_REVERSE_ROWS.
• filum_prb.out, the sample output.
• merger.f90 can merge two sorted files.

The list of routines includes:

• CH_CAP capitalizes a single character.
• CH_EQI is a case insensitive comparison of two characters for equality.
• CH_IS_DIGIT returns .TRUE. if a character is a decimal digit.
• CH_LOW lowercases a single character.
• CH_SWAP swaps two characters.
• CH_TO_DIGIT returns the integer value of a base 10 digit.
• DIGIT_INC increments a decimal digit.
• DIGIT_TO_CH returns the character representation of a decimal digit.
• FILE_ADVANCE_TO_STRING searches ahead in a text file for a string.
• FILE_APPEND allows a user to append new information to an old file.
• FILE_CHAR_COUNT counts the number of characters in a file.
• FILE_COLUMN_COUNT counts the number of columns in the first line of a file.
• FILE_COLUMN_RANGE determines the minimum and maximum ranges of each column.
• FILE_COPY makes a copy of a file.
• FILE_DELETE deletes a named file if it exists.
• FILE_EXIST reports whether a file exists.
• FILE_GET_NEXT_WORD returns the next word and trailing context from a file.
• FILE_INSERT copies the contents of an input file into an output file.
• FILE_LINE_COUNT counts the number of lines in a file.
• FILE_LINE_GET gets a particular line of a file.
• FILE_MERGE merges two sorted files into a third.
• FILE_NAME_EXT_GET determines the "extension" of a file name.
• FILE_NAME_EXT_SWAP replaces the current "extension" of a file name.
• FILE_NAME_INC generates the next filename in a series.
• FILE_PARA_COUNT counts the number of paragraphs in a file.
• FILE_PAREN_CHECK checks a file for generalized parenthesis errors.
• FILE_PRINT prints the contents of a text file.
• FILE_REVERSE_ROWS makes a copy of a file with the lines in reverse order.
• FILE_REVERSE_COLUMNS makes a copy of a file with each lines reversed.
• FILE_TAG_CHECK checks a file for generalized parenthesis errors.
• FILE_UNIQUE makes a copy of the unique lines of a sorted file.
• FILE_WORD_COUNT counts the number of words in a file.
• GET_UNIT returns a free FORTRAN unit number.
• LEN_NONNULL returns the length of a string up to the last non-null character.
• NUMBER_INC increments the integer represented by a string.
• S_EQI is a case insensitive comparison of two strings for equality.
• S_INDEX_LAST finds the LAST occurrence of a given substring.
• S_LOW replaces all uppercase letters by lowercase ones.
• S_REVERSE reverses the characters in a string.
• S_TO_R reads a real number from a string.
• S_TO_RVEC reads a real vector from a string.
• TIMESTAMP prints the current YMDHMS date as a time stamp.
• WORD_COUNT counts the number of "words" in a string.

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