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#!/usr/bin/env python
import argparse
import io
import os
import re
re_enum_decl = re.compile(r'enum class (\w+)( *// *<(\w+)>)?')
re_enum_value = re.compile(r'(\w+)(?= *([,=]|//|$))')
re_values = re.compile(r'UNC_OPTVALS\((\w+)\)')
re_aliases = re.compile(r'UNC_OPTVAL_ALIAS\(([^)]+)\)')
enums = {}
values = {}
root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
script = os.path.relpath(__file__, root)
# =============================================================================
class Enumeration(object):
# -------------------------------------------------------------------------
def __init__(self, name, prefix, f):
self.name = name
self.prefix = prefix
self.values = []
self.value_aliases = {}
self.convert_internal = False
for line in iter(f.readline, ''):
line = line.strip()
if line.startswith('{'):
for line in iter(f.readline, ''):
line = line.strip()
if line.startswith('};'):
return
if 'UNC_INTERNAL' in line:
return
if 'UNC_CONVERT_INTERNAL' in line:
self.convert_internal = True
continue
mv = re_enum_value.match(line)
if mv is not None:
v = mv.group(1)
self.values.append(v)
self.value_aliases[v] = [v.lower()]
# -------------------------------------------------------------------------
def add_aliases(self, value, *args):
aliases = [x[1:-1] for x in args] # strip quotes
self.value_aliases[value] += aliases
# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
# -----------------------------------------------------------------------------
def enum_value(enum, value):
if enum.prefix is not None:
return u'{}_{}'.format(enum.prefix, value)
return value
# -----------------------------------------------------------------------------
def write_banner(out, args):
out.write(
u'/**\n'
u' * @file {out_name}\n'
u' * Helpers for option enumerators.\n'
u' * Automatically generated by <code>{script}</code>\n'
u' * from {in_name}.\n'
u' */\n'
u'\n'.format(
in_name=os.path.basename(args.header),
out_name=os.path.basename(args.output),
script=script))
# -----------------------------------------------------------------------------
def write_value_strings(out, args):
for vn, vs in values.items():
out.write(u'const char *const {}_values[] = {{\n'.format(vn))
out.write(u'{}\n nullptr\n}};\n\n'.format(
u'\n'.join([u' "{}",'.format(x.lower()) for x in vs])))
# -----------------------------------------------------------------------------
def write_aliases(out, args):
for enum in enums.values():
if enum.prefix is None:
continue
for v in enum.values:
out.write(u'constexpr auto {p}_{v} = {n}::{v};\n'.format(
p=enum.prefix, n=enum.name, v=v))
out.write(u'\n')
# -----------------------------------------------------------------------------
def write_conversions(out, args):
header = u'\n//{}\n'.format('-' * 77)
for enum in enums.values():
if enum.convert_internal:
continue
out.write(header)
out.write(
u'bool convert_string(const char *in, {} &out)\n'.format(
enum.name))
out.write(
u'{\n'
u' if (false)\n'
u' {\n'
u' }\n')
for v in enum.values:
for a in enum.value_aliases[v]:
out.write(
u' else if (strcasecmp(in, "{}") == 0)\n'
u' {{\n'
u' out = {};\n'
u' return(true);\n'
u' }}\n'.format(a, enum_value(enum, v)))
out.write(
u' else\n'
u' {\n'
u' return(false);\n'
u' }\n'
u'}\n\n')
for enum in enums.values():
out.write(header)
out.write(u'const char *to_string({} val)\n'.format(enum.name))
out.write(u'{\n'
u' switch (val)\n'
u' {\n')
for v in enum.values:
vs = v if enum.convert_internal else v.lower()
out.write(
u' case {}:\n'
u' return "{}";\n\n'.format(
enum_value(enum, v), vs))
out.write(
u' default:\n'
u' fprintf(stderr, "%s: Unknown {} \'%d\'\\n",\n'
u' __func__, static_cast<int>(val));\n'
u' log_flush(true);\n'
u' exit(EX_SOFTWARE);\n'
u' }}\n'
u'}}\n\n'.format(enum.name))
# -----------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser(description='Generate options.cpp')
parser.add_argument('output', type=str,
help='location of options.cpp to write')
parser.add_argument('header', type=str,
help='location of options.h to read')
parser.add_argument('template', type=str,
help='location of option_enum.cpp.in '
'to use as template')
args = parser.parse_args()
with io.open(args.header, 'rt', encoding='utf-8') as f:
for line in iter(f.readline, ''):
line = line.strip()
me = re_enum_decl.match(line)
if me is not None:
e = Enumeration(me.group(1), me.group(3), f)
enums[e.name] = e
continue
mv = re_values.match(line)
if mv is not None:
enum_name = mv.group(1)
enum = enums['{}_e'.format(enum_name)]
values[enum_name] = enum.values
ma = re_aliases.match(line)
if ma is not None:
alias_args = [x.strip() for x in ma.group(1).split(',')]
enum = enums[alias_args[0]]
enum.add_aliases(*alias_args[1:])
replacements = {
u'##BANNER##': write_banner,
u'##VALUE_STRINGS##': write_value_strings,
u'##ALIASES##': write_aliases,
u'##CONVERSIONS##': write_conversions,
}
with io.open(args.output, 'wt', encoding='utf-8') as out:
with io.open(args.template, 'rt', encoding='utf-8') as t:
for line in t:
directive = line.strip()
if directive in replacements:
replacements[directive](out, args)
else:
out.write(line)
# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
if __name__ == '__main__':
main()
|
