[eudev] [PATCH] hwdb: add tool to parse hwdb grammer

[Marcus Folkesson]

Inherited from systemd project.

Signed-off-by: Marcus Folkesson <marcus.folkesson@×××××.com>
---
 hwdb/parse_hwdb.py | 246 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 246 insertions(+)
 create mode 100755 hwdb/parse_hwdb.py

diff --git a/hwdb/parse_hwdb.py b/hwdb/parse_hwdb.py
new file mode 100755
index 000000000..f4cc9c697
--- /dev/null
+++ b/hwdb/parse_hwdb.py
@@ -0,0 +1,246 @@
+#!/usr/bin/env python3
+# -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
+#  SPDX-License-Identifier: MIT
+#
+# This file is part of systemd. It is distrubuted under the MIT license, see
+# below.
+#
+# Copyright 2016 Zbigniew Jędrzejewski-Szmek
+#
+# The MIT License (MIT)
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import glob
+import string
+import sys
+import os
+
+try:
+    from pyparsing import (Word, White, Literal, ParserElement, Regex,
+                           LineStart, LineEnd,
+                           OneOrMore, Combine, Or, Optional, Suppress, Group,
+                           nums, alphanums, printables,
+                           stringEnd, pythonStyleComment, QuotedString,
+                           ParseBaseException)
+except ImportError:
+    print('pyparsing is not available')
+    sys.exit(77)
+
+try:
+    from evdev.ecodes import ecodes
+except ImportError:
+    ecodes = None
+    print('WARNING: evdev is not available')
+
+try:
+    from functools import lru_cache
+except ImportError:
+    # don't do caching on old python
+    lru_cache = lambda: (lambda f: f)
+
+EOL = LineEnd().suppress()
+EMPTYLINE = LineEnd()
+COMMENTLINE = pythonStyleComment + EOL
+INTEGER = Word(nums)
+STRING =  QuotedString('"')
+REAL = Combine((INTEGER + Optional('.' + Optional(INTEGER))) ^ ('.' + INTEGER))
+SIGNED_REAL = Combine(Optional(Word('-+')) + REAL)
+UDEV_TAG = Word(string.ascii_uppercase, alphanums + '_')
+
+TYPES = {'mouse':    ('usb', 'bluetooth', 'ps2', '*'),
+         'evdev':    ('name', 'atkbd', 'input'),
+         'id-input': ('modalias'),
+         'touchpad': ('i8042', 'rmi', 'bluetooth', 'usb'),
+         'joystick': ('i8042', 'rmi', 'bluetooth', 'usb'),
+         'keyboard': ('name', ),
+         'sensor':   ('modalias', ),
+        }
+
+@lru_cache()
+def hwdb_grammar():
+    ParserElement.setDefaultWhitespaceChars('')
+
+    prefix = Or(category + ':' + Or(conn) + ':'
+                for category, conn in TYPES.items())
+    matchline = Combine(prefix + Word(printables + ' ' + '®')) + EOL
+    propertyline = (White(' ', exact=1).suppress() +
+                    Combine(UDEV_TAG - '=' - Word(alphanums + '_=:@*.!-;, "') - Optional(pythonStyleComment)) +
+                    EOL)
+    propertycomment = White(' ', exact=1) + pythonStyleComment + EOL
+
+    group = (OneOrMore(matchline('MATCHES*') ^ COMMENTLINE.suppress()) -
+             OneOrMore(propertyline('PROPERTIES*') ^ propertycomment.suppress()) -
+             (EMPTYLINE ^ stringEnd()).suppress())
+    commentgroup = OneOrMore(COMMENTLINE).suppress() - EMPTYLINE.suppress()
+
+    grammar = OneOrMore(group('GROUPS*') ^ commentgroup) + stringEnd()
+
+    return grammar
+
+@lru_cache()
+def property_grammar():
+    ParserElement.setDefaultWhitespaceChars(' ')
+
+    dpi_setting = (Optional('*')('DEFAULT') + INTEGER('DPI') + Suppress('@') + INTEGER('HZ'))('SETTINGS*')
+    mount_matrix_row = SIGNED_REAL + ',' + SIGNED_REAL + ',' + SIGNED_REAL
+    mount_matrix = (mount_matrix_row + ';' + mount_matrix_row + ';' + mount_matrix_row)('MOUNT_MATRIX')
+
+    props = (('MOUSE_DPI', Group(OneOrMore(dpi_setting))),
+             ('MOUSE_WHEEL_CLICK_ANGLE', INTEGER),
+             ('MOUSE_WHEEL_CLICK_ANGLE_HORIZONTAL', INTEGER),
+             ('MOUSE_WHEEL_CLICK_COUNT', INTEGER),
+             ('MOUSE_WHEEL_CLICK_COUNT_HORIZONTAL', INTEGER),
+             ('ID_INPUT', Literal('1')),
+             ('ID_INPUT_ACCELEROMETER', Literal('1')),
+             ('ID_INPUT_JOYSTICK', Literal('1')),
+             ('ID_INPUT_KEY', Literal('1')),
+             ('ID_INPUT_KEYBOARD', Literal('1')),
+             ('ID_INPUT_MOUSE', Literal('1')),
+             ('ID_INPUT_POINTINGSTICK', Literal('1')),
+             ('ID_INPUT_SWITCH', Literal('1')),
+             ('ID_INPUT_TABLET', Literal('1')),
+             ('ID_INPUT_TABLET_PAD', Literal('1')),
+             ('ID_INPUT_TOUCHPAD', Literal('1')),
+             ('ID_INPUT_TOUCHSCREEN', Literal('1')),
+             ('ID_INPUT_TRACKBALL', Literal('1')),
+             ('MOUSE_WHEEL_TILT_HORIZONTAL', Literal('1')),
+             ('MOUSE_WHEEL_TILT_VERTICAL', Literal('1')),
+             ('POINTINGSTICK_SENSITIVITY', INTEGER),
+             ('POINTINGSTICK_CONST_ACCEL', REAL),
+             ('ID_INPUT_JOYSTICK_INTEGRATION', Or(('internal', 'external'))),
+             ('ID_INPUT_TOUCHPAD_INTEGRATION', Or(('internal', 'external'))),
+             ('XKB_FIXED_LAYOUT', STRING),
+             ('XKB_FIXED_VARIANT', STRING),
+             ('KEYBOARD_LED_NUMLOCK', Literal('0')),
+             ('KEYBOARD_LED_CAPSLOCK', Literal('0')),
+             ('ACCEL_MOUNT_MATRIX', mount_matrix),
+            )
+    fixed_props = [Literal(name)('NAME') - Suppress('=') - val('VALUE')
+                   for name, val in props]
+    kbd_props = [Regex(r'KEYBOARD_KEY_[0-9a-f]+')('NAME')
+                 - Suppress('=') -
+                 ('!' ^ (Optional('!') - Word(alphanums + '_')))('VALUE')
+                ]
+    abs_props = [Regex(r'EVDEV_ABS_[0-9a-f]{2}')('NAME')
+                 - Suppress('=') -
+                 Word(nums + ':')('VALUE')
+                ]
+
+    grammar = Or(fixed_props + kbd_props + abs_props) + EOL
+
+    return grammar
+
+ERROR = False
+def error(fmt, *args, **kwargs):
+    global ERROR
+    ERROR = True
+    print(fmt.format(*args, **kwargs))
+
+def convert_properties(group):
+    matches = [m[0] for m in group.MATCHES]
+    props = [p[0] for p in group.PROPERTIES]
+    return matches, props
+
+def parse(fname):
+    grammar = hwdb_grammar()
+    try:
+        with open(fname, 'r', encoding='UTF-8') as f:
+            parsed = grammar.parseFile(f)
+    except ParseBaseException as e:
+        error('Cannot parse {}: {}', fname, e)
+        return []
+    return [convert_properties(g) for g in parsed.GROUPS]
+
+def check_match_uniqueness(groups):
+    matches = sum((group[0] for group in groups), [])
+    matches.sort()
+    prev = None
+    for match in matches:
+        if match == prev:
+            error('Match {!r} is duplicated', match)
+        prev = match
+
+def check_one_default(prop, settings):
+    defaults = [s for s in settings if s.DEFAULT]
+    if len(defaults) > 1:
+        error('More than one star entry: {!r}', prop)
+
+def check_one_mount_matrix(prop, value):
+    numbers = [s for s in value if s not in {';', ','}]
+    if len(numbers) != 9:
+        error('Wrong accel matrix: {!r}', prop)
+    try:
+        numbers = [abs(float(number)) for number in numbers]
+    except ValueError:
+        error('Wrong accel matrix: {!r}', prop)
+    bad_x, bad_y, bad_z = max(numbers[0:3]) == 0, max(numbers[3:6]) == 0, max(numbers[6:9]) == 0
+    if bad_x or bad_y or bad_z:
+        error('Mount matrix is all zero in {} row: {!r}',
+              'x' if bad_x else ('y' if bad_y else 'z'),
+              prop)
+
+def check_one_keycode(prop, value):
+    if value != '!' and ecodes is not None:
+        key = 'KEY_' + value.upper()
+        if key not in ecodes:
+            key = value.upper()
+            if key not in ecodes:
+                error('Keycode {} unknown', key)
+
+def check_properties(groups):
+    grammar = property_grammar()
+    for matches, props in groups:
+        prop_names = set()
+        for prop in props:
+            # print('--', prop)
+            prop = prop.partition('#')[0].rstrip()
+            try:
+                parsed = grammar.parseString(prop)
+            except ParseBaseException as e:
+                error('Failed to parse: {!r}', prop)
+                continue
+            # print('{!r}'.format(parsed))
+            if parsed.NAME in prop_names:
+                error('Property {} is duplicated', parsed.NAME)
+            prop_names.add(parsed.NAME)
+            if parsed.NAME == 'MOUSE_DPI':
+                check_one_default(prop, parsed.VALUE.SETTINGS)
+            elif parsed.NAME == 'ACCEL_MOUNT_MATRIX':
+                check_one_mount_matrix(prop, parsed.VALUE)
+            elif parsed.NAME.startswith('KEYBOARD_KEY_'):
+                check_one_keycode(prop, parsed.VALUE)
+
+def print_summary(fname, groups):
+    print('{}: {} match groups, {} matches, {} properties'
+          .format(fname,
+                  len(groups),
+                  sum(len(matches) for matches, props in groups),
+                  sum(len(props) for matches, props in groups)))
+
+if __name__ == '__main__':
+    args = sys.argv[1:] or glob.glob(os.path.dirname(sys.argv[0]) + '/[67]0-*.hwdb')
+
+    for fname in args:
+        groups = parse(fname)
+        print_summary(fname, groups)
+        check_match_uniqueness(groups)
+        check_properties(groups)
+
+    sys.exit(ERROR)
-- 
2.15.1