aboutsummaryrefslogtreecommitdiffstats
path: root/configure
diff options
context:
space:
mode:
authorreinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2004-01-29 04:40:03 +0000
committerreinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2004-01-29 04:40:03 +0000
commitc55aed7370e3ec705ebe830089f5597a03ce6cf4 (patch)
treefef712a1282df7cdb2696a7c44023873899b0e1b /configure
parent8693355bca5e588d361a6eebb89e582e8aef7fe9 (diff)
downloadlcd4linux-c55aed7370e3ec705ebe830089f5597a03ce6cf4.tar.gz
[lcd4linux @ 2004-01-29 04:40:02 by reinelt]
every .c file includes "config.h" now git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@344 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
Diffstat (limited to 'configure')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 07:57:54 +0000
5' href='#n105'>105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 
/* $Id: plugin_python.c,v 1.4 2005/05/08 04:32:45 reinelt Exp $
 *
 * Python plugin
 *
 * Copyright 2005 Dan Fritz  
 * Copyright 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LCD4Linux is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 * $Log: plugin_python.c,v $
 * Revision 1.4  2005/05/08 04:32:45  reinelt
 * CodingStyle added and applied
 *
 * Revision 1.3  2005/05/04 05:22:12  reinelt
 * * replaced fprintf(stderr,...  with error()
 * * corrected a "dangling reference" memory problem
 * * removed some PyErr_Print() spam
 * * fixed a segmentation fault that occured when python module was not
 * found
 * * improved error messages
 *
 * Revision 1.2  2005/05/03 11:13:24  reinelt
 * rearranged autoconf a bit,
 * libX11 will be linked only if really needed (i.e. when the X11 driver has been selected)
 * plugin_python filled with life
 *
 * Revision 1.1  2005/05/02 10:29:20  reinelt
 * preparations for python bindings and python plugin
 *
 */

/* 
 * exported functions:
 *
 * int plugin_init_python (void)
 *  adds a python interpreter
 * 
 */

#include <Python.h>
#include "debug.h"
#include "plugin.h"

/* 
 * Executes a python function specified by function name and module.
 *
 * This method is more or less a copy of an example found in the python 
 * documentation. Kudos goes to Guido van Rossum and Fred L. Drake.
 * 
 * Fixme: this function should be able to accept and receive any types 
 * of arguments supported by the evaluator. Right now only strings are accepted.
 */

static void pyt_exec_str(RESULT * result, const char *module, const char *function, int argc, const char *argv[])
{

    PyObject *pName, *pModule, *pDict, *pFunc;
    PyObject *pArgs, *pValue;
    const char *rv = NULL;
    int i;

    pName = PyString_FromString(module);
    /* Error checking of pName left out */

    pModule = PyImport_Import(pName);
    Py_DECREF(pName);

    if (pModule != NULL) {
	pDict = PyModule_GetDict(pModule);
	/* pDict is a borrowed reference */

	pFunc = PyDict_GetItemString(pDict, function);
	/* pFun: Borrowed reference */

	if (pFunc && PyCallable_Check(pFunc)) {
	    pArgs = PyTuple_New(argc);
	    for (i = 0; i < argc; ++i) {
		pValue = PyString_FromString(argv[i]);
		if (!pValue) {
		    Py_DECREF(pArgs);
		    Py_DECREF(pModule);
		    error("Cannot convert argument \"%s\" to python format", argv[i]);
		    SetResult(&result, R_STRING, "");
		    return;
		}
		/* pValue reference stolen here: */
		PyTuple_SetItem(pArgs, i, pValue);
	    }
	    pValue = PyObject_CallObject(pFunc, pArgs);
	    Py_DECREF(pArgs);
	    if (pValue != NULL) {
		rv = PyString_AsString(pValue);
		SetResult(&result, R_STRING, rv);
		Py_DECREF(pValue);
		/* rv is now a 'dangling reference' */
		return;
	    } else {
		Py_DECREF(pModule);
		error("Python call failed (\"%s.%s\")", module, function);
		SetResult(&result, R_STRING, "");
		return;
	    }
	    /* pDict and pFunc are borrowed and must not be Py_DECREF-ed */
	} else {
	    error("Can not find python function \"%s.%s\"", module, function);
	}
	Py_DECREF(pModule);
    } else {
	error("Failed to load python module \"%s\"", module);
    }
    SetResult(&result, R_STRING, "");
    return;
}

static int python_cleanup_responsibility = 0;

static void my_exec(RESULT * result, RESULT * module, RESULT * function, RESULT * arg)
{
    /* Fixme: a plugin should be able to accept any number of arguments, don't know how
       to code that (yet) */
    const char *args[] = { R2S(arg) };
    pyt_exec_str(result, R2S(module), R2S(function), 1, args);
}

int plugin_init_python(void)
{
    if (!Py_IsInitialized()) {
	Py_Initialize();
	python_cleanup_responsibility = 1;
    }
    AddFunction("python::exec", 3, my_exec);
    return 0;
}

void plugin_exit_python(void)
{
    /* Make sure NOT to call Py_Finalize() When (and if) the entire lcd4linux process 
     * is started from inside python
     */
    if (python_cleanup_responsibility) {
	python_cleanup_responsibility = 0;
	Py_Finalize();
    }
}