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#!/usr/bin/env python
# Parses linux/input.h scanning for #define KEY_FOO 134
# Prints C header files or Python files that can be used as
# mapping and lookup tables.
#
from __future__ import print_function
import re
import sys
import argparse
class Bits(object):
pass
prefixes = [
"EV_",
"REL_",
"ABS_",
"KEY_",
"BTN_",
"LED_",
"SND_",
"MSC_",
"SW_",
"FF_",
"SYN_",
"REP_",
"INPUT_PROP_",
]
blacklist = [
"EV_VERSION",
"BTN_MISC",
"BTN_MOUSE",
"BTN_JOYSTICK",
"BTN_GAMEPAD",
"BTN_DIGI",
"BTN_WHEEL",
"BTN_TRIGGER_HAPPY"
]
btn_additional = [
[0, "BTN_A"],
[0, "BTN_B"],
[0, "BTN_X"],
[0, "BTN_Y"],
]
names = [
"REL_",
"ABS_",
"KEY_",
"BTN_",
"LED_",
"SND_",
"MSC_",
"SW_",
"FF_",
"SYN_",
"REP_",
]
def print_bits(bits, prefix):
if not hasattr(bits, prefix):
return
print("static const char * const %s_map[%s_MAX + 1] = {" % (prefix, prefix.upper()))
for val, name in list(getattr(bits, prefix).items()):
print(" [%s] = \"%s\"," % (name, name))
if prefix == "key":
for val, name in list(getattr(bits, "btn").items()):
print(" [%s] = \"%s\"," % (name, name))
print("};")
print("")
def print_python_bits(bits, prefix):
if not hasattr(bits, prefix):
return
print("%s_map = {" % (prefix))
for val, name in list(getattr(bits, prefix).items()):
print(" %d : \"%s\"," % (val, name))
if prefix == "key":
for val, name in list(getattr(bits, "btn").items()):
print(" %d : \"%s\"," % (val, name))
print("}")
print("for k, v in %s_map.items():" % (prefix))
print(" %s_map[v] = k" % (prefix))
print("")
def print_map(bits):
print("static const char * const * const event_type_map[EV_MAX + 1] = {")
for prefix in prefixes:
if prefix == "BTN_" or prefix == "EV_" or prefix == "INPUT_PROP_":
continue
print(" [EV_%s] = %s_map," % (prefix[:-1], prefix[:-1].lower()))
print("};")
print("")
print("#pragma GCC diagnostic push")
print("#pragma GCC diagnostic ignored \"-Woverride-init\"")
print("static const int ev_max[EV_MAX + 1] = {")
print(" [0 ... EV_MAX] = -1,")
for prefix in prefixes:
if prefix == "BTN_" or prefix == "EV_" or prefix == "INPUT_PROP_":
continue
print(" [EV_%s] = %s_MAX," % (prefix[:-1], prefix[:-1]))
print("};")
print("#pragma GCC diagnostic pop /* \"-Woverride-init\" */")
print("")
def print_python_map(bits):
print("map = {")
for val, name in list(getattr(bits, "ev").items()):
name = name[3:]
if name == "REP" or name == "PWR" or name == "FF_STATUS" or name == "MAX":
continue
print(" %d : %s_map," % (val, name.lower()))
print("}")
print("")
def print_lookup(bits, prefix):
if not hasattr(bits, prefix):
return
names = list(getattr(bits, prefix).items())
if prefix == "btn":
names = names + btn_additional;
for val, name in sorted(names, key=lambda e: e[1]):
print(" { .name = \"%s\", .value = %s }," % (name, name))
def print_lookup_table(bits):
print("struct name_entry {")
print(" const char *name;")
print(" unsigned int value;")
print("};")
print("")
print("static const struct name_entry ev_names[] = {")
print_lookup(bits, "ev")
print("};")
print("")
print("static const struct name_entry code_names[] = {")
for prefix in sorted(names, key=lambda e: e):
print_lookup(bits, prefix[:-1].lower())
print("};")
print("")
def print_mapping_table(bits):
print("/* THIS FILE IS GENERATED, DO NOT EDIT */")
print("")
print("#ifndef EVENT_NAMES_H")
print("#define EVENT_NAMES_H")
print("")
print("#ifndef SYN_MAX /* added in 3.12 */")
print("#define SYN_MAX 0xf")
print("#endif")
print("")
for prefix in prefixes:
if prefix == "BTN_":
continue
print_bits(bits, prefix[:-1].lower())
print_map(bits)
print_lookup_table(bits)
print("#endif /* EVENT_NAMES_H */")
def print_python_mapping_table(bits):
print("# THIS FILE IS GENERATED, DO NOT EDIT")
print("")
for prefix in prefixes:
if prefix == "BTN_":
continue
print_python_bits(bits, prefix[:-1].lower())
print_python_map(bits)
print("def event_get_type_name(type):")
print(" return ev_map[type]")
print("")
print("")
print("def event_get_code_name(type, code):")
print(" if map.has_key(type) and map[type].has_key(code):")
print(" return map[type][code]")
print(" return 'UNKNOWN'")
print("")
def parse_define(bits, line):
m = re.match(r"^#define\s+(\w+)\s+(\w+)", line)
if m == None:
return
name = m.group(1)
if name in blacklist:
return
try:
value = int(m.group(2), 0)
except ValueError:
return
for prefix in prefixes:
if not name.startswith(prefix):
continue
attrname = prefix[:-1].lower()
if not hasattr(bits, attrname):
setattr(bits, attrname, {})
b = getattr(bits, attrname)
b[value] = name
def parse(fp):
bits = Bits()
lines = fp.readlines()
for line in lines:
if not line.startswith("#define"):
continue
parse_define(bits, line)
return bits
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("--output", default="c")
parser.add_argument('source', metavar="/path/to/linux/input.h",
type=argparse.FileType('r'),
help='source file to parse')
args = parser.parse_args(sys.argv[1:])
bits = parse(args.source)
if args.output == "python":
print_python_mapping_table(bits)
else:
print_mapping_table(bits)
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