ctypeslib - Online in the Cloud

PROGRAM:

NAME

h2xml - convert header files to XML intermediates
xml2py - convert XML intermediates to Python ctypes interface

SYNOPSIS

h2xml includefile ... [options] -o outputxmlfile
xml2py xmlfile ... [options] -o outputpyfile

DESCRIPTION

ctypeslib is a Python code generator capable of converting C header files into xml files
(using gccxml), and then converting the xmlfiles into Python modules which define a ctypes
interface to the corresponding C library.

Ctypeslib is not ctypes. Ctypes is included in Python 2.5+ and as an add-on for lower
versions, while ctypeslib is a lesser known add-on written by the ctypes author. If you
use ctypes a lot and are tired of setting argtypes and restype of the called functions,
you should look into ctypeslib. Ctypeslib can also set up data types and structures from
C header files automatically.

h2xml and xml2py are the user interface scripts to ctypeslib. h2xml converts C header
files into xml intermediates (using gccxml) and xml2py converts these intermediates to
Python files. At the minimum, you can get automatic construction of the C types
(structures, etc) in ctypes definitions. With extra options, macro definitions can be
expanded and the output Python file can be automatically linked (using ctypes) to the
corresponding C library.

The briefest example is:

h2xml header.h -o out_c.xml
xml2py out_c.xml -o out_c.py

To obtain preprocessor symbols, you must use the -c flag to h2xml. To automatically link
to C libraries via ctypes, you muss pass the relevant libraries to xml2py with -l
library.so.

OPTIONS

h2xml options:

-h, --help
show brief help message

-q, --quiet

-D NAME[=VALUE]
macros to define

-U NAME
macros to undefine

-I DIRECTORY
additional include directories

-o XMLFILE
XML output filename

-c, --cpp-symbols
try to find #define symbols - this may give compiler errors, so it's off by
default.

-k don't delete the temporary files created (useful for finding problems)

xml2py options:

-h, --help
show this help message and exit

-c include source file location in comments

-d include docstrings containing C prototype and source file location

-k TYPEKIND
kind of type descriptions to include: d = #defines, e = enumerations, f =
functions, s = structures, t = typedefs

-l DLLS
libraries to search for exported functions

-o OUTPUT
output filename (if not specified, standard output will be used)

-r EXPRESSION
regular expression for symbols to include (if neither symbols nor
expressions are specified,everything will be included)

-s SYMBOL
symbol to include (if neither symbols nor expressions are
specified,everything will be included)

-v verbose output

-w add all standard windows dlls to the searched dlls list

-m module
Python module(s) containing symbols which will be imported instead of
generated

--preload=DLL
dlls to be loaded before all others (to resolve symbols)

EXAMPLES

Please see /usr/share/doc/python-ctypeslib/examples.Debian for examples and explanation.

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