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<html>
<head>
<title>
F90SPLIT - Split FORTRAN90 Source Files
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
F90SPLIT <br> Split FORTRAN90 Source Files
</h1>
<hr>
<p>
<b>F90SPLIT</b>
is a FORTRAN90 program which
reads a (simple) FORTRAN90 source code, and writes each routine
to a separate file with an extension of ".f90".
</p>
<p>
Here, by "routine", we mean a chunk of text that begins with
a <b>BLOCKDATA</b>, <b>FUNCTION</b>, <b>MODULE</b>,
<b>PROGRAM</b> or <b>SUBROUTINE</b> unit and ends with an <b>END</b>
statement.
</p>
<p>
This utility can be convenient when your goal is to create a
UNIX "AR" archive of the compiled object code. By splitting
your source code up, and compiling each routine separately,
you end up with a library in which each compiled module is
individual listed and replaceable.
</p>
<h3 align = "center">
Usage:
</h3>
<p>
<blockquote>
<b>f90split</b> <i>myprog.f90</i>
</blockquote>
where
<ul>
<li>
<i>myprog.f90</i> is the file to be split.
</li>
</ul>
</p>
<p>
Instead of the name of a single file, a pattern can be given,
as in:
<blockquote>
<b>f90split</b> <i>sub*.f90</i>
</blockquote>
in which case each file whose name matches the pattern will
be handled by the program.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>F90SPLIT</b> is available in
<a href = "../../c_src/f90split/f90split.html">a C version</a> and
<a href = "../../f_src/f90split/f90split.html">a FORTRAN90 version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../cpp_src/catalog/catalog.html">
CATALOG</a>,
a C++ program which
reads a C, C++, FORTRAN77 or FORTRAN90 program and prints every line
that begins with a special index tag. If the program has been marked
up expecting this convention, it is a handy way of making a table
of contents of a program file.
</p>
<p>
<a href = "../../f_src/extract/extract.html">
EXTRACT</a>,
a FORTRAN90 program which
extracts a subroutine, function or module by name from a
FORTRAN file.
</p>
<p>
<a href = "../../c_src/f77split/f77split.html">
F77SPLIT</a>,
a C program which
can split a FORTRAN77 file.
</p>
<p>
<a href = "../../f_src/fixcon/fixcon.html">
FIXCON</a>,
a FORTRAN90 program which
reads a FORTRAN file using FORTRAN77 continuation statements,
and makes a copy that uses FORTRAN90 continuation instead.
</p>
<p>
<a href = "../../cpp_src/htmlindex/htmlindex.html">
HTMLINDEX</a>,
a C++ program which
reads a FORTRAN program and writes a skeleton HTML page describing it,
assuming that each subroutine includes a '!!' or 'cc' description line.
</p>
<p>
<a href = "../../f_src/include_files/include_files.html">
INCLUDE_FILES</a>,
a FORTRAN90 program which
reads a FORTRAN program with INCLUDE
statements, and makes a copy with the indicated files included.
</p>
<p>
<a href = "../../f_src/module_mark/module_mark.html">
MODULE_MARK</a>,
a FORTRAN90 program which
replaces bare "END" statements by "END (module name)" statements
in a FORTRAN90 file.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "f90split.f90">f90split.f90</a>, the source code;
</li>
<li>
<a href = "f90split.sh">f90split.sh</a>,
commands to compile and load the source code;
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "f90split_prb.f90">f90split_prb.f90</a>, a sample file
to split up;
</li>
<li>
<a href = "f90split_prb.sh">f90split_prb.sh</a>,
commands to have F90SPLIT split up the sample file;
</li>
<li>
<a href = "f90split_prb_output.txt">
f90split_prb_output.txt</a>,
the printed output from a run of the program.
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>MAIN</b> is the main program for F90SPLIT.
</li>
<li>
<b>HANDLE</b> handles one file.
</li>
<li>
<b>CH_CAP</b> capitalizes a single character.
</li>
<li>
<b>CH_LOW</b> lowercases a single character.
</li>
<li>
<b>DIGIT_TO_CH</b> returns the character representation of a decimal digit.
</li>
<li>
<b>F90_LINE_IS_BEGIN</b> determines if a line begins a FORTRAN90 routine.
</li>
<li>
<b>F90_LINE_IS_END</b> determines if a line ends a FORTRAN90 module.
</li>
<li>
<b>FILE_EXT</b> determines the "extension" of a file name.
</li>
<li>
<b>GET_UNIT</b> returns a free FORTRAN unit number.
</li>
<li>
<b>S_BEFORE_SS_COPY</b> copies a string up to a given substring.
</li>
<li>
<b>S_BLANK_DELETE</b> removes blanks from a string, left justifying the remainder.
</li>
<li>
<b>S_BLANKS_DELETE</b> replaces consecutive blanks by one blank.
</li>
<li>
<b>S_CAP</b> replaces any lowercase letters by uppercase ones in a string.
</li>
<li>
<b>S_CAT</b> concatenates two strings to make a third string.
</li>
<li>
<b>S_EQI</b> is a case insensitive comparison of two strings for equality.
</li>
<li>
<b>S_INDEX_LAST</b> finds the LAST occurrence of a given substring.
</li>
<li>
<b>S_INDEXI</b> is a case-insensitive INDEX function.
</li>
<li>
<b>S_LOW</b> replaces all uppercase letters by lowercase ones.
</li>
<li>
<b>S_SPLIT</b> divides a string into three parts, given the middle.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a time stamp.
</li>
<li>
<b>WORD_NEXT_READ</b> "reads" words from a string, one at a time.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../f_src.html">
the FORTRAN90 source codes</a>.
</p>
<hr>
<i>
Last revised on 23 August 2011.
</i>
<!-- John Burkardt -->
</body>
</html>