mirror of https://github.com/xemu-project/xemu.git
302 lines
11 KiB
Python
Executable File
302 lines
11 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2022 Matt Borgerson
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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"""
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Generates C/C++ code to load/store application config based on a spec file.
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"""
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import yaml
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import json
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import logging
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import argparse
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import os
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from typing import Optional, Sequence, Mapping, Any
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logging.basicConfig(level=logging.INFO)
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log = logging.getLogger()
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class ConfigNode:
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def __init__(self, name: str, entry: Mapping[str, Any]):
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self.name: str = name
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# Support shorthand field: type
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if isinstance(entry, str):
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entry = {
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'type': entry
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}
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self.type: str = entry.pop('type', 'table')
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# Type name aliases
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self.type = {
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'bool': 'boolean',
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'int': 'integer',
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'float': 'number',
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'str': 'string',
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}.get(self.type, self.type)
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supported_types = ('boolean', 'string', 'integer', 'number', 'enum', 'array', 'table')
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assert self.type in supported_types, \
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f'{name}: Invalid type {self.type}, expected one of {supported_types}'
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self.array_item_type: 'ConfigNode' = None
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self.children: Sequence['ConfigNode'] = []
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self.attrs: Mapping[str, Any] = {}
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self.value: Any = None
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if self.type == 'table':
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for k, v in entry.items():
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self.children.append(ConfigNode(k, v))
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else:
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self.attrs.update(entry)
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default_values = {
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'boolean': False,
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'string': '',
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'integer': 0,
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'number': 0.0,
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'array': [],
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}
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self.value = entry.get('default', default_values.get(self.type, None))
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if self.type == 'enum' and self.value is None:
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self.value = list(self.values)[0]
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if self.type == 'array':
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self.array_item_type = ConfigNode('', self.items)
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def __getattr__(self, name: str) -> Any:
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if name in self.attrs:
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return self.attrs[name]
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else:
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raise AttributeError(name)
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def __str__(self, depth: int = 0) -> str:
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s = ' '*depth + f'{self.name}<{self.type}>'
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if self.type in ('boolean', 'string', 'integer', 'number', 'enum'):
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s += f' = {repr(self.value)}'
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if self.type == 'enum':
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s += f" {{{', '.join(map(repr, self.values))}}}"
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if self.type == 'array':
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s += ' of {\n'
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s += self.array_item_type.__str__(depth=depth+1)
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s += ' '*depth + '}'
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s += '\n'
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for c in self.children:
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s += c.__str__(depth=depth+1)
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return s
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def enum_name(self, path: str) -> str:
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return path.replace('.', '_').upper()
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def enum_value(self, path: str, value: str) -> str:
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return self.enum_name(path + '_' + value)
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def enum_count(self, path: str) -> str:
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return self.enum_value(path, '_COUNT')
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def gen_c_enums(self, path: str = '') -> str:
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if self.name:
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cpath = (path + '.' + self.name) if path else self.name
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else:
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cpath = path
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s = ''
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if self.type == 'enum':
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s += f'enum {self.enum_name(cpath)}_ {{\n'
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for i, v in enumerate(self.values):
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s += '\t' + self.enum_value(cpath, v) + f' = {i},\n'
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s += '\t'+self.enum_count(cpath) + f' = {len(self.values)}\n'
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s += f'}};\ntypedef int {self.enum_name(cpath)};\n\n'
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for c in self.children:
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s += c.gen_c_enums(cpath)
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if self.array_item_type:
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s += self.array_item_type.gen_c_enums(cpath)
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return s
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def field_name(self, path: str) -> str:
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return path.replace('.', '_')
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def gen_c_decl(self, path: str, array=False, var='') -> str:
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if self.type == 'boolean':
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s = f'bool '
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elif self.type == 'string':
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s = f'const char *'
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elif self.type == 'integer':
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s = f'int '
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elif self.type == 'number':
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s = f'float '
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elif self.type == 'array':
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s = f'struct {self.name}_item *'
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elif self.type == 'enum':
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s = f'{self.enum_name(path + "." + self.name)} '
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else:
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assert False
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if array:
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s += '*'
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s += var if var else self.name
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return s
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def gen_c_struct(self, path: str = '', indent: int = 0, var: str = '', array: bool = False) -> str:
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if self.name:
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cpath = (path + '.' + self.name) if path else self.name
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else:
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cpath = path
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s = ''
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if self.array_item_type:
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s += self.array_item_type.gen_c_typedefs(cpath)
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if var:
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s += ' '*indent + f'struct {var} {{\n'
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else:
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s += ' '*indent + f'struct {self.name} {{\n'
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for c in self.children:
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if c.type == 'table':
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s += c.gen_c_struct(cpath, indent+1, var=c.name)
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else:
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if c.type == 'array':
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if c.array_item_type.type == 'table':
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s += c.array_item_type.gen_c_struct(cpath + '.' + c.name, indent=indent+1, var=c.name, array=True)
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else:
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s += ' '*(indent+1) + c.array_item_type.gen_c_decl(cpath, var=c.name, array=True) + ';\n'
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s += ' '*(indent+1) + 'unsigned int ' + c.name + '_count;\n'
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else:
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s += ' '*(indent+1) + c.gen_c_decl(cpath) + ';\n'
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if var:
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s += ' '*indent + '} ' + ('*' if array else '') + var + ';\n'
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else:
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s += ' '*indent + '};\n'
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return s
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class Config:
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def __init__(self, path: str, root_node_name: str):
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doc = open(path).read()
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doc = doc.replace('\t', ' ') ## PyYAML doesn't like tabs
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log.debug('Input config contents:\n%s', doc)
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self.root = ConfigNode(root_node_name, yaml.load(doc, yaml.Loader))
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def gen_cnode_def_file(self, path: str = '', spath: str = '', node: Optional[ConfigNode] = None, depth: int = 0) -> str:
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if node is None:
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s = 'CNode {}_tree =\n'.format(self.root.name)
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s += self.gen_cnode_def_file(path='', spath=self.root.name, node=self.root, depth=1)
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s = s[0:-1] + ';\n'
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return s
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if node is self.root:
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cpath = ''
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elif node.name:
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cpath = (path + '.' + node.name) if path else node.name
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else:
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cpath = path
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s = ''
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ind = ' '*depth
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nind = ' '*(depth+1)
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if node.type == 'table':
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s += ind + f'ctab("{node.name}", {{\n'
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for i, c in enumerate(node.children):
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if i > 0:
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s = s[0:-1] + ',\n'
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s += self.gen_cnode_def_file(path=cpath, spath=spath, node=c, depth=depth+1)
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s += ind + '})\n'
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else:
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if node.name:
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offset_of_field = nind + f'offsetof(struct {spath}, {cpath}),\n'
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elif path == '':
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# Non-table array item
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offset_of_field = nind + '0, '
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nind = ''
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if node.type == 'boolean':
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s += ind + f'cbool(\n' + offset_of_field
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s += nind + f'"{node.name}", {"true" if node.value else "false"})\n'
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elif node.type == 'string':
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s += ind + f'cstring(\n' + offset_of_field
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s += nind + f'"{node.name}", "{node.value}")\n'
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elif node.type == 'integer':
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s += ind + f'cinteger(\n' + offset_of_field
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s += nind + f'"{node.name}", {node.value})\n'
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elif node.type == 'number':
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s += ind + f'cnumber(\n' + offset_of_field
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s += nind + f'"{node.name}", {node.value})\n'
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elif node.type == 'array':
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s += ind + f'carray(\n' + offset_of_field
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s += nind + f'offsetof(struct {spath}, {cpath}_count),\n'
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if node.array_item_type.type == 'table':
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s += nind + f'sizeof(struct {spath}::{cpath.replace(".", "::")}),\n'
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else:
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s += nind + f'sizeof(((struct {spath} *){{0}})->{cpath}[0]),\n'
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s += nind + f'"{node.name}", \n'
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spath = spath + '::' + cpath.replace('.', '::')
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s += self.gen_cnode_def_file(path='', spath=spath, node=node.array_item_type, depth=depth+1)
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s += ind + ')\n'
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elif node.type == 'enum':
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s += ind + f'cenum(\n' + offset_of_field
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assert node.value, f"Missing default value for {cpath}"
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s += nind + f'"{node.name}", {{{", ".join(json.dumps(v) for v in node.values)}}}, {json.dumps(node.value)})\n'
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else:
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assert False, node.type
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return s
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def gen_c_file(self) -> str:
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return ( '#include <stdbool.h>\n'
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+ self.root.gen_c_enums()
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+ self.root.gen_c_struct())
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def main():
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ap = argparse.ArgumentParser()
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ap.add_argument('spec', help='Input config specification path')
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ap.add_argument('output', help='Output config header path')
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ap.add_argument('--struct', help='Name of generated config structure', required=False, default='config')
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args = ap.parse_args()
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c = Config(args.spec, args.struct)
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header_name = args.struct.upper() + '_H'
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s = f'''\
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/* Autogenerated by gen_config.py do not edit */
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#ifndef {header_name}
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#define {header_name}
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{c.gen_c_file()}
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#endif
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#ifdef DEFINE_CONFIG_TREE
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{c.gen_cnode_def_file()}
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#endif
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'''
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with open(args.output, 'w') as f:
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f.write(s)
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if __name__ == '__main__':
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main()
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