This is the command preprocess that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
preprocess - Preprocess a file.
SYNOPSIS
preprocess [options...] infile
DESCRIPTION
Preprocess is like a typical C preprocessor, but it extends to multiple languages.
Languages for which it works include: C++, Python, Perl, Tcl, XML, JavaScript, CSS, IDL,
TeX, Fortran, PHP, Java, Shell scripts (Bash, CSH, etc.) and C#. Preprocess is usable both
as a command line app and as a Python module.
OPTIONS
-h, --help
Print help text and exit.
-V, --version
Print the version info and exit.
-v, --verbose
Give verbose output for errors.
-o outfile
Write output to the given file instead of to stdout.
-f, --force
Overwrite given output file. Otherwise an IOError will be raised if outfile already
exists.
-D define
Define a variable for preprocessing. define can simply be a variable name (in which
case it will be true) or it can be of the form var=val. An attempt will be made to
convert val to an integer so "-D FOO=0" will create a false value.
-I dir Add a directory to the include path for #include directives.
-k, --keep-lines
Emit empty lines for preprocessor statement lines and skipped output lines. This
allows line numbers to stay constant.
-s, --substitute
Substitute defines into emitted lines. By default substitution is NOT done because
it currently will substitute into program strings.
MODULE USAGE
from preprocess import preprocess
preprocess(infile, outfile=sys.stdout, defines={}, force=0,
keepLines=0, includePath=[], substitute=0)
The <infile> can be marked up with special preprocessor statement lines of the form:
<comment-prefix> <preprocessor-statement> <comment-suffix>
where the <comment-prefix/suffix> are the native comment delimiters for that file type.
EXAMPLES
HTML (*.htm, *.html) or XML (*.xml, *.kpf, *.xul) files:
<!-- #if FOO -->
...
<!-- #endif -->
Python (*.py), Perl (*.pl), Tcl (*.tcl), Ruby (*.rb), Bash (*.sh), or make ([Mm]akefile*)
files:
# #if defined('FAV_COLOR') and FAV_COLOR == "blue"
...
# #elif FAV_COLOR == "red"
...
# #else
...
# #endif
C (*.c, *.h), C++ (*.cpp, *.cxx, *.cc, *.h, *.hpp, *.hxx, *.hh), Java (*.java), PHP
(*.php) or C# (*.cs) files:
// #define FAV_COLOR 'blue'
...
/* #ifndef FAV_COLOR */
...
// #endif
Fortran 77 (*.f) or 90/95 (*.f90) files:
C #if COEFF == 'var'
...
C #endif
PREPROCESSOR SYNTAX
Valid statements:
#define <var> [<value>]
#undef <var>
#ifdef <var>
#ifndef <var>
#if <expr>
#elif <expr>
#else
#endif
#error <error string>
#include "<file>"
where <expr> is any valid Python expression.
The expression after #if/elif may be a Python statement. It is an error to refer to a
variable that has not been defined by a -D option or by an in-content #define.
Special built-in methods for expressions:
defined(varName) Return true if given variable is defined.
TIPS
A suggested file naming convention is to let input files to preprocess be of the form
<basename>.p.<ext> and direct the output of preprocess to <basename>.<ext>, e.g.:
preprocess -o foo.py foo.p.py
The advantage is that other tools (esp. editors) will still recognize the unpreprocessed
file as the original language.
AUTHORS
Trent Mick <[email protected]>
This manual page was written by Johannes Ring <[email protected]> for the Debian GNU/Linux
system (but may be used by others).
PREPROCESS(1)
Use preprocess online using onworks.net services
