eventgen.py

#!/usr/bin/env python
import sys
import os

try:
    output_file_name = sys.argv[1]
except:
    sys.stderr.write("Output file name is not specified\n");
    sys.exit(1)

sys.path.insert(0, os.getcwd())
definition = __import__(output_file_name)

header_file = []
c_file = []

def addtoh(line):
    header_file.append(line)

def addtoc(line):
    c_file.append(line)

common_events = [
    #"EV_NOEVENT",
    "EV_INIT",
    "EV_EXIT",
    "EV_STATE_ENTERED",
    "EV_RETURN",
    "EV_TIMEOUT",
    "EV_TIMER"
    ]


addtoh('''/**
 * @file
 * Automatically generated definition of events.
 * @warning DO NOT EDIT!!! Instead modify %(fn)s.py.
 */
#ifndef _%(fn)s_h
#define _%(fn)s_h
#include <fsm_common_events.h>
''' % {"fn":output_file_name})

addtoc('''/**
 * @file
 * Automatically generated code for printing event names.
 * @warning DO NOT EDIT!!! Instead modify %(fn)s.py.
 */
#include <fsm.h>
#include "%(fn)s.h"

const char *fsm_event_str(int ev)
{
        const char *ret = fsm_common_event_str(ev);
        if (ret) return ret;

        switch (ev) {'''%{"fn":output_file_name})

fsm_num = 0
for fsm_name, fsm_events in definition.events.iteritems():
    fsm_num += 1
    fsm_enum = "int"                    # If there is no event, the type fallbacks to int
    fsm_enum = "enum fsm_events_%s" % fsm_name
    event_num = fsm_num * 100
    addtoh("/** Definition of events, which can be sent to %s FSM. */" % fsm_name.upper())
    addtoh("%s {" % fsm_enum )
    for ev, comment in fsm_events.iteritems():
        event = "__%(fsm)s_%(ev)s = %(num)d," % { "fsm":fsm_name.upper(), "ev":ev, "num":event_num}
        if comment:
            addtoh("        %(event)-40s /**< %(comment)s */" % {"event":event, "comment":comment})
        else:
            addtoh("        %s" % event)
        event_num += 1
    for ev in common_events:
        event = "__%(fsm)s_COMMON_%(ev)s = __COMMON_%(ev)s," % { "fsm":fsm_name.upper(), "ev":ev}
        addtoh("        %s" % event)
    addtoh("}; /* end fsm_events_%s */" % fsm_name)
    addtoh("""
#ifdef FSM_%(fu)s
  #ifdef __FSM_ALIASES_DEFINED
  #error Multiple FSM_<ID> macros defined
  #else
  #define __FSM_ALIASES_DEFINED
  #endif
  #define __FSM_EVENT_ENUM %(enum)s
""" % { "fu":fsm_name.upper(), "enum":fsm_enum} )
    for e in fsm_events:
        addtoh("  #define %(event)-33s __%(fsm)s_%(event)s" % { "fsm":fsm_name.upper(), "event":e })
    for e in common_events:
        addtoh("  #define %(event)-33s __%(fsm)s_COMMON_%(event)s" % { "fsm":fsm_name.upper(), "event":e })
    addtoh("#endif /* FSM_%s */" % fsm_name.upper())
    addtoh("")

    for e in fsm_events:
        addtoc("\tcase __%(fsm)s_%(e)s: return \"%(e)s\";" % {"fsm":fsm_name.upper(), "e":e})


addtoc('''\tdefault: return "undefined event!!!";
        }
}''')

addtoh("#endif")

f = open(output_file_name+".h", "w")
for l in header_file: f.write(l+"\n")
f = open(output_file_name+".c", "w")
for l in c_file: f.write(l+"\n");

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