24f866f6a3
The gen-controls.py script handles the data structure produced by the YAML parser manually through the whole code base. Clean this up by encapsulating it in Control and ControlEnum classes to model a control and its enum values respectively, to decouple YAML data handling from generation. No functional change intended. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
294 lines
8.4 KiB
Python
Executable file
294 lines
8.4 KiB
Python
Executable file
#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (C) 2019, Google Inc.
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#
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# Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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#
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# gen-controls.py - Generate control definitions from YAML
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import argparse
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from functools import reduce
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import operator
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import string
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import sys
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import yaml
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class ControlEnum(object):
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def __init__(self, data):
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self.__data = data
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@property
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def description(self):
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"""The enum description"""
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return self.__data.get('description')
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@property
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def name(self):
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"""The enum name"""
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return self.__data.get('name')
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@property
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def value(self):
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"""The enum value"""
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return self.__data.get('value')
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class Control(object):
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def __init__(self, name, data):
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self.__name = name
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self.__data = data
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self.__enum_values = None
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enum_values = data.get('enum')
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if enum_values is not None:
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self.__enum_values = [ControlEnum(enum) for enum in enum_values]
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@property
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def description(self):
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"""The control description"""
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return self.__data.get('description')
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@property
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def enum_values(self):
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"""The enum values, if the control is an enumeration"""
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if self.__enum_values is None:
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return
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for enum in self.__enum_values:
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yield enum
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@property
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def is_enum(self):
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"""Is the control an enumeration"""
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return self.__enum_values is not None
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@property
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def is_draft(self):
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"""Is the control a draft control"""
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return self.__data.get('draft') is not None
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@property
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def name(self):
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"""The control name (CamelCase)"""
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return self.__name
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@property
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def q_name(self):
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"""The control name, qualified with a namespace"""
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ns = 'draft::' if self.is_draft else ''
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return ns + self.__name
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@property
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def type(self):
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typ = self.__data.get('type')
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size = self.__data.get('size')
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if typ == 'string':
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return 'std::string'
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if size is None:
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return typ
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if len(size) > 0:
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# fixed-sized Span
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span_size = reduce(operator.mul, size)
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return f"Span<const {typ}, {span_size}>"
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else:
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# variable-sized Span
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return f"Span<const {typ}>"
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def snake_case(s):
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return ''.join([c.isupper() and ('_' + c) or c for c in s]).strip('_')
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def format_description(description):
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description = description.strip('\n').split('\n')
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description[0] = '\\brief ' + description[0]
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return '\n'.join([(line and ' * ' or ' *') + line for line in description])
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def generate_cpp(controls):
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enum_doc_start_template = string.Template('''/**
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* \\enum ${name}Enum
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* \\brief Supported ${name} values''')
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enum_doc_value_template = string.Template(''' * \\var ${value}
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${description}''')
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doc_template = string.Template('''/**
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* \\var ${name}
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${description}
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*/''')
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def_template = string.Template('extern const Control<${type}> ${name}(${id_name}, "${name}");')
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enum_values_doc = string.Template('''/**
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* \\var ${name}Values
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* \\brief List of all $name supported values
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*/''')
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enum_values_start = string.Template('''extern const std::array<const ControlValue, ${size}> ${name}Values = {''')
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enum_values_values = string.Template('''\tstatic_cast<int32_t>(${name}),''')
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ctrls_doc = []
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ctrls_def = []
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draft_ctrls_doc = []
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draft_ctrls_def = []
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ctrls_map = []
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for ctrl in controls:
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id_name = snake_case(ctrl.name).upper()
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info = {
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'name': ctrl.name,
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'type': ctrl.type,
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'description': format_description(ctrl.description),
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'id_name': id_name,
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}
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target_doc = ctrls_doc
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target_def = ctrls_def
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if ctrl.is_draft:
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target_doc = draft_ctrls_doc
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target_def = draft_ctrls_def
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if ctrl.is_enum:
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enum_doc = []
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enum_doc.append(enum_doc_start_template.substitute(info))
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num_entries = 0
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for enum in ctrl.enum_values:
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value_info = {
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'name': ctrl.name,
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'value': enum.name,
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'description': format_description(enum.description),
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}
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enum_doc.append(enum_doc_value_template.substitute(value_info))
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num_entries += 1
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enum_doc = '\n *\n'.join(enum_doc)
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enum_doc += '\n */'
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target_doc.append(enum_doc)
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values_info = {
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'name': info['name'],
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'size': num_entries,
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}
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target_doc.append(enum_values_doc.substitute(values_info))
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target_def.append(enum_values_start.substitute(values_info))
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for enum in ctrl.enum_values:
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value_info = {
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'name': enum.name
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}
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target_def.append(enum_values_values.substitute(value_info))
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target_def.append("};")
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target_doc.append(doc_template.substitute(info))
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target_def.append(def_template.substitute(info))
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ctrls_map.append('\t{ ' + id_name + ', &' + ctrl.q_name + ' },')
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return {
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'controls_doc': '\n\n'.join(ctrls_doc),
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'controls_def': '\n'.join(ctrls_def),
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'draft_controls_doc': '\n\n'.join(draft_ctrls_doc),
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'draft_controls_def': '\n\n'.join(draft_ctrls_def),
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'controls_map': '\n'.join(ctrls_map),
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}
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def generate_h(controls):
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enum_template_start = string.Template('''enum ${name}Enum {''')
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enum_value_template = string.Template('''\t${name} = ${value},''')
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enum_values_template = string.Template('''extern const std::array<const ControlValue, ${size}> ${name}Values;''')
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template = string.Template('''extern const Control<${type}> ${name};''')
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ctrls = []
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draft_ctrls = []
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ids = []
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id_value = 1
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for ctrl in controls:
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id_name = snake_case(ctrl.name).upper()
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ids.append('\t' + id_name + ' = ' + str(id_value) + ',')
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info = {
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'name': ctrl.name,
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'type': ctrl.type,
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}
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target_ctrls = ctrls
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if ctrl.is_draft:
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target_ctrls = draft_ctrls
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if ctrl.is_enum:
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target_ctrls.append(enum_template_start.substitute(info))
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num_entries = 0
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for enum in ctrl.enum_values:
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value_info = {
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'name': enum.name,
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'value': enum.value,
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}
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target_ctrls.append(enum_value_template.substitute(value_info))
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num_entries += 1
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target_ctrls.append("};")
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values_info = {
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'name': info['name'],
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'size': num_entries,
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}
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target_ctrls.append(enum_values_template.substitute(values_info))
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target_ctrls.append(template.substitute(info))
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id_value += 1
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return {
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'ids': '\n'.join(ids),
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'controls': '\n'.join(ctrls),
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'draft_controls': '\n'.join(draft_ctrls)
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}
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def fill_template(template, data):
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template = open(template, 'rb').read()
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template = template.decode('utf-8')
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template = string.Template(template)
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return template.substitute(data)
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def main(argv):
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# Parse command line arguments
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parser = argparse.ArgumentParser()
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parser.add_argument('-o', dest='output', metavar='file', type=str,
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help='Output file name. Defaults to standard output if not specified.')
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parser.add_argument('input', type=str,
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help='Input file name.')
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parser.add_argument('template', type=str,
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help='Template file name.')
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args = parser.parse_args(argv[1:])
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data = open(args.input, 'rb').read()
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controls = yaml.safe_load(data)['controls']
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controls = [Control(*ctrl.popitem()) for ctrl in controls]
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if args.template.endswith('.cpp.in'):
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data = generate_cpp(controls)
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elif args.template.endswith('.h.in'):
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data = generate_h(controls)
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else:
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raise RuntimeError('Unknown template type')
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data = fill_template(args.template, data)
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if args.output:
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output = open(args.output, 'wb')
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output.write(data.encode('utf-8'))
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output.close()
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else:
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sys.stdout.write(data)
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return 0
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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