libsigrok/bindings/cxx/enums.py

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##
## This file is part of the libsigrok project.
##
## Copyright (C) 2014 Martin Ling <martin-sigrok@earth.li>
##
## This program 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 3 of the License, or
## (at your option) any later version.
##
## This program 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, see <http://www.gnu.org/licenses/>.
##
from __future__ import print_function
from xml.etree import ElementTree
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from collections import OrderedDict
import sys, os, re
index_file = sys.argv[1]
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# Get directory this script is in.
dirname = os.path.dirname(os.path.realpath(__file__))
outdirname = "bindings/cxx"
if not os.path.exists(os.path.join(outdirname, 'include/libsigrok')):
os.makedirs(os.path.join(outdirname, 'include/libsigrok'))
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mapping = dict([
('sr_loglevel', ('LogLevel', 'Log verbosity level')),
('sr_packettype', ('PacketType', 'Type of datafeed packet')),
('sr_mq', ('Quantity', 'Measured quantity')),
('sr_unit', ('Unit', 'Unit of measurement')),
('sr_mqflag', ('QuantityFlag', 'Flag applied to measured quantity')),
('sr_configkey', ('ConfigKey', 'Configuration key')),
('sr_datatype', ('DataType', 'Configuration data type')),
('sr_channeltype', ('ChannelType', 'Channel type')),
('sr_trigger_matches', ('TriggerMatchType', 'Trigger match type'))])
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index = ElementTree.parse(index_file)
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# Build mapping between class names and enumerations.
classes = OrderedDict()
for compound in index.findall('compound'):
if compound.attrib['kind'] != 'file':
continue
filename = os.path.join(
os.path.dirname(index_file),
'%s.xml' % compound.attrib['refid'])
doc = ElementTree.parse(filename)
for section in doc.find('compounddef').findall('sectiondef'):
if section.attrib["kind"] != 'enum':
continue
for member in section.findall('memberdef'):
if member.attrib["kind"] != 'enum':
continue
name = member.find('name').text
if name in mapping:
classes[member] = mapping[name]
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header = open(os.path.join(outdirname, 'include/libsigrok/enums.hpp'), 'w')
code = open(os.path.join(outdirname, 'enums.cpp'), 'w')
swig = open(os.path.join(dirname, '../swig/enums.i'), 'w')
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for file in (header, code):
print("/* Generated file - edit enums.py instead! */", file=file)
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# Template for beginning of class declaration and public members.
header_public_template = """
/** {brief} */
class SR_API {classname} : public EnumValue<{classname}, enum {enumname}>
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{{
public:
"""
# Template for beginning of private members.
header_private_template = """
protected:
{classname}(enum {enumname} id, const char name[]) : EnumValue(id, name) {{}}
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"""
def get_text(node):
return str.join('\n\n',
[p.text.rstrip() for p in node.findall('para')])
for enum, (classname, classbrief) in classes.items():
enum_name = enum.find('name').text
members = enum.findall('enumvalue')
member_names = [m.find('name').text for m in members]
trimmed_names = [re.sub("^SR_[A-Z]+_", "", n) for n in member_names]
briefs = [get_text(m.find('briefdescription')) for m in members]
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# Begin class and public declarations
print(header_public_template.format(
brief=classbrief, classname=classname, enumname=enum_name), file=header)
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# Declare public pointers for each enum value
for trimmed_name, brief in zip(trimmed_names, briefs):
if brief:
print('\t/** %s */' % brief, file=header)
print('\tstatic const %s * const %s;' % (
classname, trimmed_name), file=header)
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# Declare additional methods if present
filename = os.path.join(dirname, "%s_methods.hpp" % classname)
if os.path.exists(filename):
print(str.join('', open(filename).readlines()), file=header)
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# Begin private declarations
print(header_private_template.format(
classname=classname, enumname=enum_name), file=header)
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# Declare private constants for each enum value
for trimmed_name in trimmed_names:
print('\tstatic const %s _%s;' % (classname, trimmed_name), file=header)
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# End class declaration
print('};', file=header)
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# Define private constants for each enum value
for name, trimmed_name in zip(member_names, trimmed_names):
print('const %s %s::_%s = %s(%s, "%s");' % (
classname, classname, trimmed_name, classname, name, trimmed_name),
file=code)
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# Define public pointers for each enum value
for trimmed_name in trimmed_names:
print('const %s * const %s::%s = &%s::_%s;' % (
classname, classname, trimmed_name, classname, trimmed_name),
file=code)
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# Define map of enum values to constants
print('template<> const std::map<const enum %s, const %s * const> EnumValue<%s, enum %s>::_values = {' % (
enum_name, classname, classname, enum_name), file=code)
for name, trimmed_name in zip(member_names, trimmed_names):
print('\t{%s, %s::%s},' % (name, classname, trimmed_name), file=code)
print('};', file=code)
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# Define additional methods if present
filename = os.path.join(dirname, "%s_methods.cpp" % classname)
if os.path.exists(filename):
print(str.join('', open(filename).readlines()), file=code)
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# Map EnumValue::id() and EnumValue::name() as SWIG attributes.
print('%%attribute(sigrok::%s, int, id, id);' % classname, file=swig)
print('%%attributestring(sigrok::%s, std::string, name, name);' % classname,
file=swig)
# Instantiate EnumValue template for SWIG
print('%%template(EnumValue%s) sigrok::EnumValue<sigrok::%s, enum %s>;' % (
classname, classname, enum_name), file=swig)
# Apply any language-specific extras.
print('%%enumextras(%s);' % classname, file=swig)
# Declare additional attributes if present
filename = os.path.join(dirname, "%s_methods.i" % classname)
if os.path.exists(filename):
print(str.join('', open(filename).readlines()), file=swig)