2303 lines
90 KiB
Python
2303 lines
90 KiB
Python
#!/usr/bin/env python
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from xml.etree.cElementTree import *
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from os.path import basename
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import getopt
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import sys
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import re
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# Jump to the bottom of this file for the main routine
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# Some hacks to make the API more readable, and to keep backwards compability
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_cname_re = re.compile('([A-Z0-9][a-z]+|[A-Z0-9]+(?![a-z])|[a-z]+)')
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_cname_special_cases = {'DECnet':'decnet'}
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_extension_special_cases = ['XPrint', 'XCMisc', 'BigRequests']
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_cplusplus_annoyances = {'class' : '_class',
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'new' : '_new',
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'delete': '_delete'}
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_c_keywords = {'default' : '_default'}
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_hlines = []
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_hlevel = 0
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_clines = []
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_clevel = 0
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_ns = None
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# global variable to keep track of serializers and
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# switch data types due to weird dependencies
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finished_serializers = []
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finished_sizeof = []
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finished_switch = []
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def _h(fmt, *args):
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'''
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Writes the given line to the header file.
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'''
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_hlines[_hlevel].append(fmt % args)
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def _c(fmt, *args):
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'''
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Writes the given line to the source file.
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'''
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_clines[_clevel].append(fmt % args)
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def _hc(fmt, *args):
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'''
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Writes the given line to both the header and source files.
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'''
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_h(fmt, *args)
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_c(fmt, *args)
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# XXX See if this level thing is really necessary.
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def _h_setlevel(idx):
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'''
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Changes the array that header lines are written to.
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Supports writing different sections of the header file.
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'''
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global _hlevel
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while len(_hlines) <= idx:
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_hlines.append([])
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_hlevel = idx
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def _c_setlevel(idx):
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'''
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Changes the array that source lines are written to.
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Supports writing to different sections of the source file.
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'''
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global _clevel
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while len(_clines) <= idx:
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_clines.append([])
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_clevel = idx
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def _n_item(str):
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'''
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Does C-name conversion on a single string fragment.
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Uses a regexp with some hard-coded special cases.
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'''
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if str in _cname_special_cases:
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return _cname_special_cases[str]
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else:
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split = _cname_re.finditer(str)
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name_parts = [match.group(0) for match in split]
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return '_'.join(name_parts)
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def _cpp(str):
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'''
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Checks for certain C++ reserved words and fixes them.
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'''
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if str in _cplusplus_annoyances:
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return _cplusplus_annoyances[str]
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elif str in _c_keywords:
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return _c_keywords[str]
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else:
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return str
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def _ext(str):
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'''
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Does C-name conversion on an extension name.
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Has some additional special cases on top of _n_item.
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'''
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if str in _extension_special_cases:
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return _n_item(str).lower()
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else:
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return str.lower()
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def _n(list):
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'''
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Does C-name conversion on a tuple of strings.
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Different behavior depending on length of tuple, extension/not extension, etc.
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Basically C-name converts the individual pieces, then joins with underscores.
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'''
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if len(list) == 1:
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parts = list
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elif len(list) == 2:
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parts = [list[0], _n_item(list[1])]
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elif _ns.is_ext:
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parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]]
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else:
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parts = [list[0]] + [_n_item(i) for i in list[1:]]
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return '_'.join(parts).lower()
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def _t(list):
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'''
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Does C-name conversion on a tuple of strings representing a type.
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Same as _n but adds a "_t" on the end.
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'''
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if len(list) == 1:
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parts = list
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elif len(list) == 2:
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parts = [list[0], _n_item(list[1]), 't']
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elif _ns.is_ext:
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parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]] + ['t']
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else:
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parts = [list[0]] + [_n_item(i) for i in list[1:]] + ['t']
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return '_'.join(parts).lower()
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def c_open(self):
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'''
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Exported function that handles module open.
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Opens the files and writes out the auto-generated comment, header file includes, etc.
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'''
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global _ns
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_ns = self.namespace
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_ns.c_ext_global_name = _n(_ns.prefix + ('id',))
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# Build the type-name collision avoidance table used by c_enum
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build_collision_table()
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_h_setlevel(0)
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_c_setlevel(0)
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_hc('/*')
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_hc(' * This file generated automatically from %s by c_client.py.', _ns.file)
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_hc(' * Edit at your peril.')
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_hc(' */')
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_hc('')
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_h('/**')
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_h(' * @defgroup XCB_%s_API XCB %s API', _ns.ext_name, _ns.ext_name)
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_h(' * @brief %s XCB Protocol Implementation.', _ns.ext_name)
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_h(' * @{')
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_h(' **/')
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_h('')
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_h('#ifndef __%s_H', _ns.header.upper())
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_h('#define __%s_H', _ns.header.upper())
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_h('')
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_h('#include "xcb.h"')
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_c('#include <stdlib.h>')
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_c('#include <string.h>')
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_c('#include <assert.h>')
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_c('#include "xcbext.h"')
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_c('#include "%s.h"', _ns.header)
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if _ns.is_ext:
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for (n, h) in self.imports:
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_hc('#include "%s.h"', h)
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_h('')
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_h('#ifdef __cplusplus')
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_h('extern "C" {')
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_h('#endif')
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if _ns.is_ext:
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_h('')
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_h('#define XCB_%s_MAJOR_VERSION %s', _ns.ext_name.upper(), _ns.major_version)
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_h('#define XCB_%s_MINOR_VERSION %s', _ns.ext_name.upper(), _ns.minor_version)
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_h(' ') #XXX
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_h('extern xcb_extension_t %s;', _ns.c_ext_global_name)
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_c('')
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_c('xcb_extension_t %s = { "%s", 0 };', _ns.c_ext_global_name, _ns.ext_xname)
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def c_close(self):
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'''
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Exported function that handles module close.
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Writes out all the stored content lines, then closes the files.
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'''
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_h_setlevel(2)
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_c_setlevel(2)
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_hc('')
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_h('')
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_h('#ifdef __cplusplus')
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_h('}')
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_h('#endif')
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_h('')
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_h('#endif')
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_h('')
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_h('/**')
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_h(' * @}')
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_h(' */')
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# Write header file
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hfile = open('%s.h' % _ns.header, 'w')
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for list in _hlines:
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for line in list:
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hfile.write(line)
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hfile.write('\n')
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hfile.close()
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# Write source file
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cfile = open('%s.c' % _ns.header, 'w')
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for list in _clines:
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for line in list:
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cfile.write(line)
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cfile.write('\n')
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cfile.close()
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def build_collision_table():
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global namecount
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namecount = {}
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for v in module.types.values():
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name = _t(v[0])
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namecount[name] = (namecount.get(name) or 0) + 1
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def c_enum(self, name):
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'''
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Exported function that handles enum declarations.
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'''
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tname = _t(name)
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if namecount[tname] > 1:
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tname = _t(name + ('enum',))
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_h_setlevel(0)
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_h('')
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_h('typedef enum %s {', tname)
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count = len(self.values)
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for (enam, eval) in self.values:
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count = count - 1
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equals = ' = ' if eval != '' else ''
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comma = ',' if count > 0 else ''
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_h(' %s%s%s%s', _n(name + (enam,)).upper(), equals, eval, comma)
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_h('} %s;', tname)
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def _c_type_setup(self, name, postfix):
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'''
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Sets up all the C-related state by adding additional data fields to
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all Field and Type objects. Here is where we figure out most of our
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variable and function names.
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Recurses into child fields and list member types.
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'''
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# Do all the various names in advance
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self.c_type = _t(name + postfix)
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self.c_wiretype = 'char' if self.c_type == 'void' else self.c_type
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self.c_iterator_type = _t(name + ('iterator',))
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self.c_next_name = _n(name + ('next',))
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self.c_end_name = _n(name + ('end',))
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self.c_request_name = _n(name)
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self.c_checked_name = _n(name + ('checked',))
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self.c_unchecked_name = _n(name + ('unchecked',))
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self.c_reply_name = _n(name + ('reply',))
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self.c_reply_type = _t(name + ('reply',))
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self.c_cookie_type = _t(name + ('cookie',))
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self.need_aux = False
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self.need_serialize = False
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self.need_sizeof = False
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self.c_aux_name = _n(name + ('aux',))
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self.c_aux_checked_name = _n(name + ('aux', 'checked'))
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self.c_aux_unchecked_name = _n(name + ('aux', 'unchecked'))
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self.c_serialize_name = _n(name + ('serialize',))
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self.c_unserialize_name = _n(name + ('unserialize',))
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self.c_unpack_name = _n(name + ('unpack',))
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self.c_sizeof_name = _n(name + ('sizeof',))
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# special case: structs where variable size fields are followed by fixed size fields
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self.var_followed_by_fixed_fields = False
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if self.is_switch:
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self.need_serialize = True
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self.c_container = 'struct'
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for bitcase in self.bitcases:
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bitcase.c_field_name = _cpp(bitcase.field_name)
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bitcase_name = bitcase.field_type if bitcase.type.has_name else name
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_c_type_setup(bitcase.type, bitcase_name, ())
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elif self.is_container:
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self.c_container = 'union' if self.is_union else 'struct'
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prev_varsized_field = None
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prev_varsized_offset = 0
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first_field_after_varsized = None
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for field in self.fields:
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_c_type_setup(field.type, field.field_type, ())
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if field.type.is_list:
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_c_type_setup(field.type.member, field.field_type, ())
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if (field.type.nmemb is None):
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self.need_sizeof = True
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field.c_field_type = _t(field.field_type)
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field.c_field_const_type = ('' if field.type.nmemb == 1 else 'const ') + field.c_field_type
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field.c_field_name = _cpp(field.field_name)
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field.c_subscript = '[%d]' % field.type.nmemb if (field.type.nmemb > 1) else ''
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field.c_pointer = ' ' if field.type.nmemb == 1 else '*'
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# correct the c_pointer field for variable size non-list types
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if not field.type.fixed_size() and field.c_pointer == ' ':
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field.c_pointer = '*'
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if field.type.is_list and not field.type.member.fixed_size():
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field.c_pointer = '*'
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if field.type.is_switch:
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field.c_pointer = '*'
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field.c_field_const_type = 'const ' + field.c_field_type
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self.need_aux = True
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elif not field.type.fixed_size() and not field.type.is_bitcase:
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self.need_sizeof = True
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field.c_iterator_type = _t(field.field_type + ('iterator',)) # xcb_fieldtype_iterator_t
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field.c_iterator_name = _n(name + (field.field_name, 'iterator')) # xcb_container_field_iterator
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field.c_accessor_name = _n(name + (field.field_name,)) # xcb_container_field
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field.c_length_name = _n(name + (field.field_name, 'length')) # xcb_container_field_length
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field.c_end_name = _n(name + (field.field_name, 'end')) # xcb_container_field_end
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field.prev_varsized_field = prev_varsized_field
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field.prev_varsized_offset = prev_varsized_offset
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if prev_varsized_offset == 0:
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first_field_after_varsized = field
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field.first_field_after_varsized = first_field_after_varsized
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if field.type.fixed_size():
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prev_varsized_offset += field.type.size
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# special case: intermixed fixed and variable size fields
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if prev_varsized_field is not None and not field.type.is_pad and field.wire:
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if not self.is_union:
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self.need_serialize = True
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self.var_followed_by_fixed_fields = True
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else:
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self.last_varsized_field = field
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prev_varsized_field = field
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prev_varsized_offset = 0
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if self.var_followed_by_fixed_fields:
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if field.type.fixed_size():
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field.prev_varsized_field = None
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if self.need_serialize:
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# when _unserialize() is wanted, create _sizeof() as well for consistency reasons
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self.need_sizeof = True
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# as switch does never appear at toplevel,
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# continue here with type construction
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if self.is_switch:
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if self.c_type not in finished_switch:
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finished_switch.append(self.c_type)
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# special: switch C structs get pointer fields for variable-sized members
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_c_complex(self)
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for bitcase in self.bitcases:
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bitcase_name = bitcase.type.name if bitcase.type.has_name else name
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_c_accessors(bitcase.type, bitcase_name, bitcase_name)
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# no list with switch as element, so no call to
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# _c_iterator(field.type, field_name) necessary
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if not self.is_bitcase:
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if self.need_serialize:
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if self.c_serialize_name not in finished_serializers:
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finished_serializers.append(self.c_serialize_name)
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_c_serialize('serialize', self)
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# _unpack() and _unserialize() are only needed for special cases:
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# switch -> unpack
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# special cases -> unserialize
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if self.is_switch or self.var_followed_by_fixed_fields:
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_c_serialize('unserialize', self)
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if self.need_sizeof:
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if self.c_sizeof_name not in finished_sizeof:
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finished_sizeof.append(self.c_sizeof_name)
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_c_serialize('sizeof', self)
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# _c_type_setup()
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def _c_helper_absolute_name(prefix, field=None):
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"""
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turn prefix, which is a list of tuples (name, separator, Type obj) into a string
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representing a valid name in C (based on the context)
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if field is not None, append the field name as well
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"""
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prefix_str = ''
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for name, sep, obj in prefix:
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prefix_str += name
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if '' == sep:
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sep = '->'
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if ((obj.is_bitcase and obj.has_name) or # named bitcase
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(obj.is_switch and len(obj.parents)>1)):
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sep = '.'
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prefix_str += sep
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if field is not None:
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prefix_str += _cpp(field.field_name)
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return prefix_str
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# _c_absolute_name
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def _c_helper_field_mapping(complex_type, prefix, flat=False):
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"""
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generate absolute names, based on prefix, for all fields starting from complex_type
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if flat == True, nested complex types are not taken into account
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"""
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all_fields = {}
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if complex_type.is_switch:
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for b in complex_type.bitcases:
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if b.type.has_name:
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switch_name, switch_sep, switch_type = prefix[-1]
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bitcase_prefix = prefix + [(b.type.name[-1], '.', b.type)]
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else:
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bitcase_prefix = prefix
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if (True==flat and not b.type.has_name) or False==flat:
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all_fields.update(_c_helper_field_mapping(b.type, bitcase_prefix, flat))
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else:
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for f in complex_type.fields:
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fname = _c_helper_absolute_name(prefix, f)
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if all_fields.has_key(f.field_name):
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raise Exception("field name %s has been registered before" % f.field_name)
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all_fields[f.field_name] = (fname, f)
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if f.type.is_container and flat==False:
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if f.type.is_bitcase and not f.type.has_name:
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new_prefix = prefix
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elif f.type.is_switch and len(f.type.parents)>1:
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# nested switch gets another separator
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new_prefix = prefix+[(f.c_field_name, '.', f.type)]
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else:
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new_prefix = prefix+[(f.c_field_name, '->', f.type)]
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all_fields.update(_c_helper_field_mapping(f.type, new_prefix, flat))
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return all_fields
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# _c_field_mapping()
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def _c_helper_resolve_field_names (prefix):
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"""
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get field names for all objects in the prefix array
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"""
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all_fields = {}
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tmp_prefix = []
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# look for fields in the remaining containers
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for idx, p in enumerate(prefix):
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name, sep, obj = p
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if ''==sep:
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# sep can be preset in prefix, if not, make a sensible guess
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sep = '.' if (obj.is_switch or obj.is_bitcase) else '->'
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# exception: 'toplevel' object (switch as well!) always have sep '->'
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sep = '->' if idx<1 else sep
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if not obj.is_bitcase or (obj.is_bitcase and obj.has_name):
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tmp_prefix.append((name, sep, obj))
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all_fields.update(_c_helper_field_mapping(obj, tmp_prefix, flat=True))
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return all_fields
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# _c_helper_resolve_field_names
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def get_expr_fields(self):
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"""
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get the Fields referenced by switch or list expression
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"""
|
|
def get_expr_field_names(expr):
|
|
if expr.op is None:
|
|
if expr.lenfield_name is not None:
|
|
return [expr.lenfield_name]
|
|
else:
|
|
# constant value expr
|
|
return []
|
|
else:
|
|
if expr.op == '~':
|
|
return get_expr_field_names(expr.rhs)
|
|
elif expr.op == 'popcount':
|
|
return get_expr_field_names(expr.rhs)
|
|
elif expr.op == 'sumof':
|
|
# sumof expr references another list,
|
|
# we need that list's length field here
|
|
field = None
|
|
for f in expr.lenfield_parent.fields:
|
|
if f.field_name == expr.lenfield_name:
|
|
field = f
|
|
break
|
|
if field is None:
|
|
raise Exception("list field '%s' referenced by sumof not found" % expr.lenfield_name)
|
|
# referenced list + its length field
|
|
return [expr.lenfield_name] + get_expr_field_names(field.type.expr)
|
|
elif expr.op == 'enumref':
|
|
return []
|
|
else:
|
|
return get_expr_field_names(expr.lhs) + get_expr_field_names(expr.rhs)
|
|
# get_expr_field_names()
|
|
|
|
# resolve the field names with the parent structure(s)
|
|
unresolved_fields_names = get_expr_field_names(self.expr)
|
|
|
|
# construct prefix from self
|
|
prefix = [('', '', p) for p in self.parents]
|
|
if self.is_container:
|
|
prefix.append(('', '', self))
|
|
|
|
all_fields = _c_helper_resolve_field_names (prefix)
|
|
resolved_fields_names = filter(lambda x: x in all_fields.keys(), unresolved_fields_names)
|
|
if len(unresolved_fields_names) != len(resolved_fields_names):
|
|
raise Exception("could not resolve all fields for %s" % self.name)
|
|
|
|
resolved_fields = [all_fields[n][1] for n in resolved_fields_names]
|
|
return resolved_fields
|
|
# get_expr_fields()
|
|
|
|
def resolve_expr_fields(complex_obj):
|
|
"""
|
|
find expr fields appearing in complex_obj and descendents that cannot be resolved within complex_obj
|
|
these are normally fields that need to be given as function parameters
|
|
"""
|
|
all_fields = []
|
|
expr_fields = []
|
|
unresolved = []
|
|
|
|
for field in complex_obj.fields:
|
|
all_fields.append(field)
|
|
if field.type.is_switch or field.type.is_list:
|
|
expr_fields += get_expr_fields(field.type)
|
|
if field.type.is_container:
|
|
expr_fields += resolve_expr_fields(field.type)
|
|
|
|
# try to resolve expr fields
|
|
for e in expr_fields:
|
|
if e not in all_fields and e not in unresolved:
|
|
unresolved.append(e)
|
|
return unresolved
|
|
# resolve_expr_fields()
|
|
|
|
def get_serialize_params(context, self, buffer_var='_buffer', aux_var='_aux'):
|
|
"""
|
|
functions like _serialize(), _unserialize(), and _unpack() sometimes need additional parameters:
|
|
E.g. in order to unpack switch, extra parameters might be needed to evaluate the switch
|
|
expression. This function tries to resolve all fields within a structure, and returns the
|
|
unresolved fields as the list of external parameters.
|
|
"""
|
|
def add_param(params, param):
|
|
if param not in params:
|
|
params.append(param)
|
|
|
|
# collect all fields into param_fields
|
|
param_fields = []
|
|
wire_fields = []
|
|
|
|
for field in self.fields:
|
|
if field.visible:
|
|
# the field should appear as a parameter in the function call
|
|
param_fields.append(field)
|
|
if field.wire and not field.auto:
|
|
if field.type.fixed_size() and not self.is_switch:
|
|
# field in the xcb_out structure
|
|
wire_fields.append(field)
|
|
# fields like 'pad0' are skipped!
|
|
|
|
# in case of switch, parameters always contain any fields referenced in the switch expr
|
|
# we do not need any variable size fields here, as the switch data type contains both
|
|
# fixed and variable size fields
|
|
if self.is_switch:
|
|
param_fields = get_expr_fields(self)
|
|
|
|
# _serialize()/_unserialize()/_unpack() function parameters
|
|
# note: don't use set() for params, it is unsorted
|
|
params = []
|
|
|
|
# 1. the parameter for the void * buffer
|
|
if 'serialize' == context:
|
|
params.append(('void', '**', buffer_var))
|
|
elif context in ('unserialize', 'unpack', 'sizeof'):
|
|
params.append(('const void', '*', buffer_var))
|
|
|
|
# 2. any expr fields that cannot be resolved within self and descendants
|
|
unresolved_fields = resolve_expr_fields(self)
|
|
for f in unresolved_fields:
|
|
add_param(params, (f.c_field_type, '', f.c_field_name))
|
|
|
|
# 3. param_fields contain the fields necessary to evaluate the switch expr or any other fields
|
|
# that do not appear in the data type struct
|
|
for p in param_fields:
|
|
if self.is_switch:
|
|
typespec = p.c_field_const_type
|
|
pointerspec = p.c_pointer
|
|
add_param(params, (typespec, pointerspec, p.c_field_name))
|
|
else:
|
|
if p.visible and not p.wire and not p.auto:
|
|
typespec = p.c_field_type
|
|
pointerspec = ''
|
|
add_param(params, (typespec, pointerspec, p.c_field_name))
|
|
|
|
# 4. aux argument
|
|
if 'serialize' == context:
|
|
add_param(params, ('const %s' % self.c_type, '*', aux_var))
|
|
elif 'unserialize' == context:
|
|
add_param(params, ('%s' % self.c_type, '**', aux_var))
|
|
elif 'unpack' == context:
|
|
add_param(params, ('%s' % self.c_type, '*', aux_var))
|
|
|
|
# 5. switch contains all variable size fields as struct members
|
|
# for other data types though, these have to be supplied separately
|
|
# this is important for the special case of intermixed fixed and
|
|
# variable size fields
|
|
if not self.is_switch and 'serialize' == context:
|
|
for p in param_fields:
|
|
if not p.type.fixed_size():
|
|
add_param(params, (p.c_field_const_type, '*', p.c_field_name))
|
|
|
|
return (param_fields, wire_fields, params)
|
|
# get_serialize_params()
|
|
|
|
def _c_serialize_helper_insert_padding(context, code_lines, space, postpone):
|
|
code_lines.append('%s /* insert padding */' % space)
|
|
code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
|
|
# code_lines.append('%s printf("automatically inserting padding: %%%%d\\n", xcb_pad);' % space)
|
|
code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
|
|
|
|
if not postpone:
|
|
code_lines.append('%s if (0 != xcb_pad) {' % space)
|
|
|
|
if 'serialize' == context:
|
|
code_lines.append('%s xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;' % space)
|
|
code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = xcb_pad;' % space)
|
|
code_lines.append('%s xcb_parts_idx++;' % space)
|
|
elif context in ('unserialize', 'unpack', 'sizeof'):
|
|
code_lines.append('%s xcb_tmp += xcb_pad;' % space)
|
|
|
|
code_lines.append('%s xcb_pad = 0;' % space)
|
|
code_lines.append('%s }' % space)
|
|
|
|
code_lines.append('%s xcb_block_len = 0;' % space)
|
|
|
|
# keep tracking of xcb_parts entries for serialize
|
|
return 1
|
|
# _c_serialize_helper_insert_padding()
|
|
|
|
def _c_serialize_helper_switch(context, self, complex_name,
|
|
code_lines, temp_vars,
|
|
space, prefix):
|
|
count = 0
|
|
switch_expr = _c_accessor_get_expr(self.expr, None)
|
|
|
|
for b in self.bitcases:
|
|
bitcase_expr = _c_accessor_get_expr(b.type.expr, None)
|
|
code_lines.append(' if(%s & %s) {' % (switch_expr, bitcase_expr))
|
|
# code_lines.append(' printf("switch %s: entering bitcase section %s (mask=%%%%d)...\\n", %s);' %
|
|
# (self.name[-1], b.type.name[-1], bitcase_expr))
|
|
b_prefix = prefix
|
|
if b.type.has_name:
|
|
b_prefix = prefix + [(b.c_field_name, '.', b.type)]
|
|
|
|
count += _c_serialize_helper_fields(context, b.type,
|
|
code_lines, temp_vars,
|
|
"%s " % space,
|
|
b_prefix,
|
|
is_bitcase = True)
|
|
code_lines.append(' }')
|
|
|
|
# if 'serialize' == context:
|
|
# count += _c_serialize_helper_insert_padding(context, code_lines, space, False)
|
|
# elif context in ('unserialize', 'unpack', 'sizeof'):
|
|
# # padding
|
|
# code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
|
|
# code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
|
|
|
|
return count
|
|
# _c_serialize_helper_switch
|
|
|
|
def _c_serialize_helper_switch_field(context, self, field, c_switch_variable, prefix):
|
|
"""
|
|
handle switch by calling _serialize() or _unpack(), depending on context
|
|
"""
|
|
# switch is handled by this function as a special case
|
|
param_fields, wire_fields, params = get_serialize_params(context, self)
|
|
field_mapping = _c_helper_field_mapping(self, prefix)
|
|
prefix_str = _c_helper_absolute_name(prefix)
|
|
|
|
# find the parameters that need to be passed to _serialize()/_unpack():
|
|
# all switch expr fields must be given as parameters
|
|
args = get_expr_fields(field.type)
|
|
# length fields for variable size types in switch, normally only some of need
|
|
# need to be passed as parameters
|
|
switch_len_fields = resolve_expr_fields(field.type)
|
|
|
|
# a switch field at this point _must_ be a bitcase field
|
|
# we require that bitcases are "self-contiguous"
|
|
bitcase_unresolved = resolve_expr_fields(self)
|
|
if len(bitcase_unresolved) != 0:
|
|
raise Exception('unresolved fields within bitcase is not supported at this point')
|
|
|
|
# get the C names for the parameters
|
|
c_field_names = ''
|
|
for a in switch_len_fields:
|
|
c_field_names += "%s, " % field_mapping[a.c_field_name][0]
|
|
for a in args:
|
|
c_field_names += "%s, " % field_mapping[a.c_field_name][0]
|
|
|
|
# call _serialize()/_unpack() to determine the actual size
|
|
if 'serialize' == context:
|
|
length = "%s(&%s, %s&%s%s)" % (field.type.c_serialize_name, c_switch_variable,
|
|
c_field_names, prefix_str, field.c_field_name)
|
|
elif context in ('unserialize', 'unpack'):
|
|
length = "%s(xcb_tmp, %s&%s%s)" % (field.type.c_unpack_name,
|
|
c_field_names, prefix_str, field.c_field_name)
|
|
|
|
return length
|
|
# _c_serialize_helper_switch_field()
|
|
|
|
def _c_serialize_helper_list_field(context, self, field,
|
|
code_lines, temp_vars,
|
|
space, prefix):
|
|
"""
|
|
helper function to cope with lists of variable length
|
|
"""
|
|
expr = field.type.expr
|
|
prefix_str = _c_helper_absolute_name(prefix)
|
|
param_fields, wire_fields, params = get_serialize_params('sizeof', self)
|
|
param_names = [p[2] for p in params]
|
|
|
|
expr_fields_names = [f.field_name for f in get_expr_fields(field.type)]
|
|
resolved = filter(lambda x: x in param_names, expr_fields_names)
|
|
unresolved = filter(lambda x: x not in param_names, expr_fields_names)
|
|
|
|
field_mapping = {}
|
|
for r in resolved:
|
|
field_mapping[r] = (r, None)
|
|
|
|
if len(unresolved)>0:
|
|
tmp_prefix = prefix
|
|
if len(tmp_prefix)==0:
|
|
raise Exception("found an empty prefix while resolving expr field names for list %s",
|
|
field.c_field_name)
|
|
|
|
field_mapping.update(_c_helper_resolve_field_names(prefix))
|
|
resolved += filter(lambda x: x in field_mapping, unresolved)
|
|
unresolved = filter(lambda x: x not in field_mapping, unresolved)
|
|
if len(unresolved)>0:
|
|
raise Exception('could not resolve the length fields required for list %s' % field.c_field_name)
|
|
|
|
list_length = _c_accessor_get_expr(expr, field_mapping)
|
|
|
|
# default: list with fixed size elements
|
|
length = '%s * sizeof(%s)' % (list_length, field.type.member.c_wiretype)
|
|
|
|
# list with variable-sized elements
|
|
if not field.type.member.fixed_size():
|
|
length = ''
|
|
if context in ('unserialize', 'sizeof', 'unpack'):
|
|
int_i = ' unsigned int i;'
|
|
xcb_tmp_len = ' unsigned int xcb_tmp_len;'
|
|
if int_i not in temp_vars:
|
|
temp_vars.append(int_i)
|
|
if xcb_tmp_len not in temp_vars:
|
|
temp_vars.append(xcb_tmp_len)
|
|
# loop over all list elements and call sizeof repeatedly
|
|
# this should be a bit faster than using the iterators
|
|
code_lines.append("%s for(i=0; i<%s; i++) {" % (space, list_length))
|
|
code_lines.append("%s xcb_tmp_len = %s(xcb_tmp);" %
|
|
(space, field.type.c_sizeof_name))
|
|
code_lines.append("%s xcb_block_len += xcb_tmp_len;" % space)
|
|
code_lines.append("%s xcb_tmp += xcb_tmp_len;" % space)
|
|
code_lines.append("%s }" % space)
|
|
|
|
elif 'serialize' == context:
|
|
code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = 0;' % space)
|
|
code_lines.append('%s xcb_tmp = (char *) %s%s;' % (space, prefix_str, field.c_field_name))
|
|
code_lines.append('%s for(i=0; i<%s; i++) { ' % (space, list_length))
|
|
code_lines.append('%s xcb_block_len = %s(xcb_tmp);' % (space, field.type.c_sizeof_name))
|
|
code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len += xcb_block_len;' % space)
|
|
code_lines.append('%s }' % space)
|
|
code_lines.append('%s xcb_block_len = xcb_parts[xcb_parts_idx].iov_len;' % space)
|
|
|
|
return length
|
|
# _c_serialize_helper_list_field()
|
|
|
|
def _c_serialize_helper_fields_fixed_size(context, self, field,
|
|
code_lines, temp_vars,
|
|
space, prefix):
|
|
# keep the C code a bit more readable by giving the field name
|
|
if not self.is_bitcase:
|
|
code_lines.append('%s /* %s.%s */' % (space, self.c_type, field.c_field_name))
|
|
else:
|
|
scoped_name = [p[2].c_type if idx==0 else p[0] for idx, p in enumerate(prefix)]
|
|
typename = reduce(lambda x,y: "%s.%s" % (x, y), scoped_name)
|
|
code_lines.append('%s /* %s.%s */' % (space, typename, field.c_field_name))
|
|
|
|
abs_field_name = _c_helper_absolute_name(prefix, field)
|
|
# default for simple cases: call sizeof()
|
|
length = "sizeof(%s)" % field.c_field_type
|
|
|
|
if context in ('unserialize', 'unpack', 'sizeof'):
|
|
# default: simple cast
|
|
value = ' %s = *(%s *)xcb_tmp;' % (abs_field_name, field.c_field_type)
|
|
|
|
# padding - we could probably just ignore it
|
|
if field.type.is_pad and field.type.nmemb > 1:
|
|
value = ''
|
|
for i in range(field.type.nmemb):
|
|
code_lines.append('%s %s[%d] = *(%s *)xcb_tmp;' %
|
|
(space, abs_field_name, i, field.c_field_type))
|
|
# total padding = sizeof(pad0) * nmemb
|
|
length += " * %d" % field.type.nmemb
|
|
|
|
if field.type.is_list:
|
|
# no such case in the protocol, cannot be tested and therefore ignored for now
|
|
raise Exception('list with fixed number of elemens unhandled in _unserialize()')
|
|
|
|
elif 'serialize' == context:
|
|
value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) '
|
|
|
|
if field.type.is_expr:
|
|
# need to register a temporary variable for the expression in case we know its type
|
|
if field.type.c_type is None:
|
|
raise Exception("type for field '%s' (expression '%s') unkown" %
|
|
(field.field_name, _c_accessor_get_expr(field.type.expr)))
|
|
|
|
temp_vars.append(' %s xcb_expr_%s = %s;' % (field.type.c_type, _cpp(field.field_name),
|
|
_c_accessor_get_expr(field.type.expr, prefix)))
|
|
value += "&xcb_expr_%s;" % _cpp(field.field_name)
|
|
|
|
elif field.type.is_pad:
|
|
if field.type.nmemb == 1:
|
|
value += "&xcb_pad;"
|
|
else:
|
|
# we could also set it to 0, see definition of xcb_send_request()
|
|
value = ' xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;'
|
|
length += "*%d" % field.type.nmemb
|
|
|
|
else:
|
|
# non-list type with fixed size
|
|
if field.type.nmemb == 1:
|
|
value += "&%s;" % (abs_field_name)
|
|
|
|
# list with nmemb (fixed size) elements
|
|
else:
|
|
value += '%s;' % (abs_field_name)
|
|
length = '%d' % field.type.nmemb
|
|
|
|
return (value, length)
|
|
# _c_serialize_helper_fields_fixed_size()
|
|
|
|
def _c_serialize_helper_fields_variable_size(context, self, field,
|
|
code_lines, temp_vars,
|
|
space, prefix):
|
|
prefix_str = _c_helper_absolute_name(prefix)
|
|
|
|
if context in ('unserialize', 'unpack', 'sizeof'):
|
|
value = ''
|
|
var_field_name = 'xcb_tmp'
|
|
|
|
# special case: intermixed fixed and variable size fields
|
|
if self.var_followed_by_fixed_fields and 'unserialize' == context:
|
|
value = ' %s = xcb_tmp;' % field.c_field_name
|
|
temp_vars.append(' %s *%s;' % (field.type.c_type, field.c_field_name))
|
|
# special case: switch
|
|
if 'unpack' == context:
|
|
value = ' %s%s = (%s *)xcb_tmp;' % (prefix_str, field.c_field_name, field.c_field_type)
|
|
|
|
elif 'serialize' == context:
|
|
# variable size fields appear as parameters to _serialize() if the
|
|
# 'toplevel' container is not a switch
|
|
prefix_string = prefix_str if prefix[0][2].is_switch else ''
|
|
var_field_name = "%s%s" % (prefix_string, field.c_field_name)
|
|
value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s;' % var_field_name
|
|
|
|
length = ''
|
|
|
|
code_lines.append('%s /* %s */' % (space, field.c_field_name))
|
|
|
|
if field.type.is_list:
|
|
if value != '':
|
|
# in any context, list is already a pointer, so the default assignment is ok
|
|
code_lines.append("%s%s" % (space, value))
|
|
value = ''
|
|
length = _c_serialize_helper_list_field(context, self, field,
|
|
code_lines, temp_vars,
|
|
space, prefix)
|
|
|
|
elif field.type.is_switch:
|
|
value = ''
|
|
if context == 'serialize':
|
|
# the _serialize() function allocates the correct amount memory if given a NULL pointer
|
|
value = ' xcb_parts[xcb_parts_idx].iov_base = (char *)0;'
|
|
length = _c_serialize_helper_switch_field(context, self, field,
|
|
'xcb_parts[xcb_parts_idx].iov_base',
|
|
prefix)
|
|
|
|
else:
|
|
# in all remaining special cases - call _sizeof()
|
|
length = "%s(%s)" % (field.type.c_sizeof_name, var_field_name)
|
|
|
|
return (value, length)
|
|
# _c_serialize_helper_fields_variable_size
|
|
|
|
def _c_serialize_helper_fields(context, self,
|
|
code_lines, temp_vars,
|
|
space, prefix, is_bitcase):
|
|
count = 0
|
|
need_padding = False
|
|
prev_field_was_variable = False
|
|
|
|
for field in self.fields:
|
|
if not ((field.wire and not field.auto) or field.visible):
|
|
continue
|
|
|
|
# switch/bitcase: fixed size fields must be considered explicitly
|
|
if field.type.fixed_size():
|
|
if self.is_bitcase or self.var_followed_by_fixed_fields:
|
|
if prev_field_was_variable and need_padding:
|
|
# insert padding
|
|
# count += _c_serialize_helper_insert_padding(context, code_lines, space,
|
|
# self.var_followed_by_fixed_fields)
|
|
prev_field_was_variable = False
|
|
|
|
# prefix for fixed size fields
|
|
fixed_prefix = prefix
|
|
|
|
value, length = _c_serialize_helper_fields_fixed_size(context, self, field,
|
|
code_lines, temp_vars,
|
|
space, fixed_prefix)
|
|
else:
|
|
continue
|
|
|
|
# fields with variable size
|
|
else:
|
|
# switch/bitcase: always calculate padding before and after variable sized fields
|
|
if need_padding or is_bitcase:
|
|
count += _c_serialize_helper_insert_padding(context, code_lines, space,
|
|
self.var_followed_by_fixed_fields)
|
|
|
|
value, length = _c_serialize_helper_fields_variable_size(context, self, field,
|
|
code_lines, temp_vars,
|
|
space, prefix)
|
|
prev_field_was_variable = True
|
|
|
|
# save (un)serialization C code
|
|
if '' != value:
|
|
code_lines.append('%s%s' % (space, value))
|
|
|
|
if field.type.fixed_size():
|
|
if is_bitcase or self.var_followed_by_fixed_fields:
|
|
# keep track of (un)serialized object's size
|
|
code_lines.append('%s xcb_block_len += %s;' % (space, length))
|
|
if context in ('unserialize', 'unpack', 'sizeof'):
|
|
code_lines.append('%s xcb_tmp += %s;' % (space, length))
|
|
else:
|
|
# variable size objects or bitcase:
|
|
# value & length might have been inserted earlier for special cases
|
|
if '' != length:
|
|
# special case: intermixed fixed and variable size fields
|
|
if (not field.type.fixed_size() and
|
|
self.var_followed_by_fixed_fields and 'unserialize' == context):
|
|
temp_vars.append(' int %s_len;' % field.c_field_name)
|
|
code_lines.append('%s %s_len = %s;' % (space, field.c_field_name, length))
|
|
code_lines.append('%s xcb_block_len += %s_len;' % (space, field.c_field_name))
|
|
code_lines.append('%s xcb_tmp += %s_len;' % (space, field.c_field_name))
|
|
else:
|
|
code_lines.append('%s xcb_block_len += %s;' % (space, length))
|
|
# increase pointer into the byte stream accordingly
|
|
if context in ('unserialize', 'sizeof', 'unpack'):
|
|
code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
|
|
|
|
if 'serialize' == context:
|
|
if '' != length:
|
|
code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = %s;' % (space, length))
|
|
code_lines.append('%s xcb_parts_idx++;' % space)
|
|
count += 1
|
|
|
|
need_padding = True
|
|
if self.var_followed_by_fixed_fields:
|
|
need_padding = False
|
|
|
|
return count
|
|
# _c_serialize_helper_fields()
|
|
|
|
def _c_serialize_helper(context, complex_type,
|
|
code_lines, temp_vars,
|
|
space='', prefix=[]):
|
|
# count tracks the number of fields to serialize
|
|
count = 0
|
|
|
|
if hasattr(complex_type, 'type'):
|
|
self = complex_type.type
|
|
complex_name = complex_type.name
|
|
else:
|
|
self = complex_type
|
|
if self.var_followed_by_fixed_fields and 'unserialize' == context:
|
|
complex_name = 'xcb_out'
|
|
else:
|
|
complex_name = '_aux'
|
|
|
|
# special case: switch is serialized by evaluating each bitcase separately
|
|
if self.is_switch:
|
|
count += _c_serialize_helper_switch(context, self, complex_name,
|
|
code_lines, temp_vars,
|
|
space, prefix)
|
|
|
|
# all other data types can be evaluated one field a time
|
|
else:
|
|
# unserialize & fixed size fields: simply cast the buffer to the respective xcb_out type
|
|
if context in ('unserialize', 'unpack', 'sizeof') and not self.var_followed_by_fixed_fields:
|
|
code_lines.append('%s xcb_block_len += sizeof(%s);' % (space, self.c_type))
|
|
code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
|
|
# probably not needed
|
|
#_c_serialize_helper_insert_padding(context, code_lines, space, False)
|
|
|
|
count += _c_serialize_helper_fields(context, self,
|
|
code_lines, temp_vars,
|
|
space, prefix, False)
|
|
# "final padding"
|
|
count += _c_serialize_helper_insert_padding(context, code_lines, space, False)
|
|
|
|
return count
|
|
# _c_serialize_helper()
|
|
|
|
def _c_serialize(context, self):
|
|
"""
|
|
depending on the context variable, generate _serialize(), _unserialize(), _unpack(), or _sizeof()
|
|
for the ComplexType variable self
|
|
"""
|
|
_h_setlevel(1)
|
|
_c_setlevel(1)
|
|
|
|
_hc('')
|
|
# _serialize() returns the buffer size
|
|
_hc('int')
|
|
|
|
if self.is_switch and 'unserialize' == context:
|
|
context = 'unpack'
|
|
|
|
cases = { 'serialize' : self.c_serialize_name,
|
|
'unserialize' : self.c_unserialize_name,
|
|
'unpack' : self.c_unpack_name,
|
|
'sizeof' : self.c_sizeof_name }
|
|
func_name = cases[context]
|
|
|
|
param_fields, wire_fields, params = get_serialize_params(context, self)
|
|
variable_size_fields = 0
|
|
# maximum space required for type definition of function arguments
|
|
maxtypelen = 0
|
|
|
|
# determine N(variable_fields)
|
|
for field in param_fields:
|
|
# if self.is_switch, treat all fields as if they are variable sized
|
|
if not field.type.fixed_size() or self.is_switch:
|
|
variable_size_fields += 1
|
|
# determine maxtypelen
|
|
for p in params:
|
|
maxtypelen = max(maxtypelen, len(p[0]) + len(p[1]))
|
|
|
|
# write to .c/.h
|
|
indent = ' '*(len(func_name)+2)
|
|
param_str = []
|
|
for p in params:
|
|
typespec, pointerspec, field_name = p
|
|
spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
|
|
param_str.append("%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name))
|
|
# insert function name
|
|
param_str[0] = "%s (%s" % (func_name, param_str[0].strip())
|
|
param_str = map(lambda x: "%s," % x, param_str)
|
|
for s in param_str[:-1]:
|
|
_hc(s)
|
|
_h("%s);" % param_str[-1].rstrip(','))
|
|
_c("%s)" % param_str[-1].rstrip(','))
|
|
_c('{')
|
|
|
|
code_lines = []
|
|
temp_vars = []
|
|
prefix = []
|
|
|
|
if 'serialize' == context:
|
|
if not self.is_switch and not self.var_followed_by_fixed_fields:
|
|
_c(' %s *xcb_out = *_buffer;', self.c_type)
|
|
_c(' unsigned int xcb_out_pad = -sizeof(%s) & 3;', self.c_type)
|
|
_c(' unsigned int xcb_buffer_len = sizeof(%s) + xcb_out_pad;', self.c_type)
|
|
else:
|
|
_c(' char *xcb_out = *_buffer;')
|
|
_c(' unsigned int xcb_buffer_len = 0;')
|
|
prefix = [('_aux', '->', self)]
|
|
aux_ptr = 'xcb_out'
|
|
|
|
elif context in ('unserialize', 'unpack'):
|
|
_c(' char *xcb_tmp = (char *)_buffer;')
|
|
if not self.is_switch:
|
|
if not self.var_followed_by_fixed_fields:
|
|
_c(' const %s *_aux = (%s *)_buffer;', self.c_type, self.c_type)
|
|
prefix = [('_aux', '->', self)]
|
|
else:
|
|
_c(' %s xcb_out;', self.c_type)
|
|
prefix = [('xcb_out', '.', self)]
|
|
else:
|
|
aux_var = '_aux' # default for unpack: single pointer
|
|
# note: unserialize not generated for switch
|
|
if 'unserialize' == context:
|
|
aux_var = '(*_aux)' # unserialize: double pointer (!)
|
|
prefix = [(aux_var, '->', self)]
|
|
aux_ptr = '*_aux'
|
|
_c(' unsigned int xcb_buffer_len = 0;')
|
|
_c(' unsigned int xcb_block_len = 0;')
|
|
_c(' unsigned int xcb_pad = 0;')
|
|
|
|
elif 'sizeof' == context:
|
|
param_names = [p[2] for p in params]
|
|
if self.is_switch:
|
|
# switch: call _unpack()
|
|
_c(' %s _aux;', self.c_type)
|
|
_c(' return %s(%s, &_aux);', self.c_unpack_name, reduce(lambda x,y: "%s, %s" % (x, y), param_names))
|
|
_c('}')
|
|
return
|
|
elif self.var_followed_by_fixed_fields:
|
|
# special case: call _unserialize()
|
|
_c(' %s *_aux = NULL;', self.c_type)
|
|
_c(' return %s(%s, &_aux);', self.c_unserialize_name, reduce(lambda x,y: "%s, %s" % (x, y), param_names))
|
|
_c('}')
|
|
return
|
|
else:
|
|
_c(' char *xcb_tmp = (char *)_buffer;')
|
|
prefix = [('_aux', '->', self)]
|
|
|
|
count = _c_serialize_helper(context, self, code_lines, temp_vars, prefix=prefix)
|
|
# update variable size fields (only important for context=='serialize'
|
|
variable_size_fields = count
|
|
if 'serialize' == context:
|
|
temp_vars.append(' unsigned int xcb_pad = 0;')
|
|
temp_vars.append(' char xcb_pad0[3] = {0, 0, 0};')
|
|
temp_vars.append(' struct iovec xcb_parts[%d];' % count)
|
|
temp_vars.append(' unsigned int xcb_parts_idx = 0;')
|
|
temp_vars.append(' unsigned int xcb_block_len = 0;')
|
|
temp_vars.append(' unsigned int i;')
|
|
temp_vars.append(' char *xcb_tmp;')
|
|
elif 'sizeof' == context:
|
|
# neither switch nor intermixed fixed and variable size fields:
|
|
# evaluate parameters directly
|
|
if not (self.is_switch or self.var_followed_by_fixed_fields):
|
|
|
|
# look if we have to declare an '_aux' variable at all
|
|
if len(filter(lambda x: x.find('_aux')!=-1, code_lines))>0:
|
|
if not self.var_followed_by_fixed_fields:
|
|
_c(' const %s *_aux = (%s *)_buffer;', self.c_type, self.c_type)
|
|
else:
|
|
_c(' %s *_aux = malloc(sizeof(%s));', self.c_type, self.c_type)
|
|
|
|
_c(' unsigned int xcb_buffer_len = 0;')
|
|
_c(' unsigned int xcb_block_len = 0;')
|
|
_c(' unsigned int xcb_pad = 0;')
|
|
|
|
_c('')
|
|
for t in temp_vars:
|
|
_c(t)
|
|
_c('')
|
|
for l in code_lines:
|
|
_c(l)
|
|
|
|
# variable sized fields have been collected, now
|
|
# allocate memory and copy everything into a continuous memory area
|
|
# note: this is not necessary in case of unpack
|
|
if context in ('serialize', 'unserialize'):
|
|
_c('')
|
|
_c(' if (NULL == %s) {', aux_ptr)
|
|
_c(' /* allocate memory */')
|
|
_c(' %s = malloc(xcb_buffer_len);', aux_ptr)
|
|
if 'serialize' == context:
|
|
_c(' *_buffer = xcb_out;')
|
|
_c(' }')
|
|
_c('')
|
|
|
|
# serialize: handle variable size fields in a loop
|
|
if 'serialize' == context:
|
|
if not self.is_switch and not self.var_followed_by_fixed_fields:
|
|
if len(wire_fields)>0:
|
|
_c(' *xcb_out = *_aux;')
|
|
# copy variable size fields into the buffer
|
|
if variable_size_fields > 0:
|
|
# xcb_out padding
|
|
if not self.is_switch and not self.var_followed_by_fixed_fields:
|
|
_c(' xcb_tmp = (char*)++xcb_out;')
|
|
_c(' xcb_tmp += xcb_out_pad;')
|
|
else:
|
|
_c(' xcb_tmp = xcb_out;')
|
|
|
|
# variable sized fields
|
|
_c(' for(i=0; i<xcb_parts_idx; i++) {')
|
|
_c(' if (0 != xcb_parts[i].iov_base && 0 != xcb_parts[i].iov_len)')
|
|
_c(' memcpy(xcb_tmp, xcb_parts[i].iov_base, xcb_parts[i].iov_len);')
|
|
_c(' if (0 != xcb_parts[i].iov_len)')
|
|
_c(' xcb_tmp += xcb_parts[i].iov_len;')
|
|
_c(' }')
|
|
|
|
# unserialize: assign variable size fields individually
|
|
if 'unserialize' == context:
|
|
_c(' *%s = xcb_out;', aux_ptr)
|
|
_c(' xcb_tmp = (char *)(*_aux+1);')
|
|
for field in param_fields:
|
|
if not field.type.fixed_size():
|
|
_c(' memcpy(xcb_tmp, %s, %s_len);', field.c_field_name, field.c_field_name)
|
|
_c(' xcb_tmp += %s_len;', field.c_field_name)
|
|
|
|
_c('')
|
|
_c(' return xcb_buffer_len;')
|
|
_c('}')
|
|
# _c_serialize()
|
|
|
|
def _c_iterator_get_end(field, accum):
|
|
'''
|
|
Figures out what C code is needed to find the end of a variable-length structure field.
|
|
For nested structures, recurses into its last variable-sized field.
|
|
For lists, calls the end function
|
|
'''
|
|
if field.type.is_container:
|
|
accum = field.c_accessor_name + '(' + accum + ')'
|
|
return _c_iterator_get_end(field.type.last_varsized_field, accum)
|
|
if field.type.is_list:
|
|
# XXX we can always use the first way
|
|
if field.type.member.is_simple:
|
|
return field.c_end_name + '(' + accum + ')'
|
|
else:
|
|
return field.type.member.c_end_name + '(' + field.c_iterator_name + '(' + accum + '))'
|
|
|
|
def _c_iterator(self, name):
|
|
'''
|
|
Declares the iterator structure and next/end functions for a given type.
|
|
'''
|
|
_h_setlevel(0)
|
|
_h('')
|
|
_h('/**')
|
|
_h(' * @brief %s', self.c_iterator_type)
|
|
_h(' **/')
|
|
_h('typedef struct %s {', self.c_iterator_type)
|
|
_h(' %s *data; /**< */', self.c_type)
|
|
_h(' int%s rem; /**< */', ' ' * (len(self.c_type) - 2))
|
|
_h(' int%s index; /**< */', ' ' * (len(self.c_type) - 2))
|
|
_h('} %s;', self.c_iterator_type)
|
|
|
|
_h_setlevel(1)
|
|
_c_setlevel(1)
|
|
_h('')
|
|
_h('/**')
|
|
_h(' * Get the next element of the iterator')
|
|
_h(' * @param i Pointer to a %s', self.c_iterator_type)
|
|
_h(' *')
|
|
_h(' * Get the next element in the iterator. The member rem is')
|
|
_h(' * decreased by one. The member data points to the next')
|
|
_h(' * element. The member index is increased by sizeof(%s)', self.c_type)
|
|
_h(' */')
|
|
_c('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** void %s', self.c_next_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param %s *i', self.c_iterator_type)
|
|
_hc(' ** @returns void')
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
_hc('void')
|
|
_h('%s (%s *i /**< */);', self.c_next_name, self.c_iterator_type)
|
|
_c('%s (%s *i /**< */)', self.c_next_name, self.c_iterator_type)
|
|
_c('{')
|
|
|
|
if not self.fixed_size():
|
|
_c(' %s *R = i->data;', self.c_type)
|
|
|
|
if self.is_union:
|
|
# FIXME - how to determine the size of a variable size union??
|
|
_c(' /* FIXME - determine the size of the union %s */', self.c_type)
|
|
else:
|
|
if self.need_sizeof:
|
|
_c(' xcb_generic_iterator_t child;')
|
|
_c(' child.data = (%s *)(((char *)R) + %s(R));',
|
|
self.c_type, self.c_sizeof_name)
|
|
_c(' i->index = (char *) child.data - (char *) i->data;')
|
|
else:
|
|
_c(' xcb_generic_iterator_t child = %s;', _c_iterator_get_end(self.last_varsized_field, 'R'))
|
|
_c(' i->index = child.index;')
|
|
_c(' --i->rem;')
|
|
_c(' i->data = (%s *) child.data;', self.c_type)
|
|
|
|
else:
|
|
_c(' --i->rem;')
|
|
_c(' ++i->data;')
|
|
_c(' i->index += sizeof(%s);', self.c_type)
|
|
|
|
_c('}')
|
|
|
|
_h('')
|
|
_h('/**')
|
|
_h(' * Return the iterator pointing to the last element')
|
|
_h(' * @param i An %s', self.c_iterator_type)
|
|
_h(' * @return The iterator pointing to the last element')
|
|
_h(' *')
|
|
_h(' * Set the current element in the iterator to the last element.')
|
|
_h(' * The member rem is set to 0. The member data points to the')
|
|
_h(' * last element.')
|
|
_h(' */')
|
|
_c('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** xcb_generic_iterator_t %s', self.c_end_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param %s i', self.c_iterator_type)
|
|
_hc(' ** @returns xcb_generic_iterator_t')
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
_hc('xcb_generic_iterator_t')
|
|
_h('%s (%s i /**< */);', self.c_end_name, self.c_iterator_type)
|
|
_c('%s (%s i /**< */)', self.c_end_name, self.c_iterator_type)
|
|
_c('{')
|
|
_c(' xcb_generic_iterator_t ret;')
|
|
|
|
if self.fixed_size():
|
|
_c(' ret.data = i.data + i.rem;')
|
|
_c(' ret.index = i.index + ((char *) ret.data - (char *) i.data);')
|
|
_c(' ret.rem = 0;')
|
|
else:
|
|
_c(' while(i.rem > 0)')
|
|
_c(' %s(&i);', self.c_next_name)
|
|
_c(' ret.data = i.data;')
|
|
_c(' ret.rem = i.rem;')
|
|
_c(' ret.index = i.index;')
|
|
|
|
_c(' return ret;')
|
|
_c('}')
|
|
|
|
def _c_accessor_get_length(expr, field_mapping=None):
|
|
'''
|
|
Figures out what C code is needed to get a length field.
|
|
The field_mapping parameter can be used to change the absolute name of a length field.
|
|
For fields that follow a variable-length field, use the accessor.
|
|
Otherwise, just reference the structure field directly.
|
|
'''
|
|
|
|
lenfield_name = expr.lenfield_name
|
|
if lenfield_name is not None:
|
|
if field_mapping is not None:
|
|
lenfield_name = field_mapping[lenfield_name][0]
|
|
|
|
if expr.lenfield is not None and expr.lenfield.prev_varsized_field is not None:
|
|
# special case: variable and fixed size fields are intermixed
|
|
# if the lenfield is among the fixed size fields, there is no need
|
|
# to call a special accessor function like <expr.lenfield.c_accessor_name + '(' + prefix + ')'>
|
|
return field_mapping(expr.lenfield_name)
|
|
elif expr.lenfield_name is not None:
|
|
return lenfield_name
|
|
else:
|
|
return str(expr.nmemb)
|
|
|
|
def _c_accessor_get_expr(expr, field_mapping):
|
|
'''
|
|
Figures out what C code is needed to get the length of a list field.
|
|
The field_mapping parameter can be used to change the absolute name of a length field.
|
|
Recurses for math operations.
|
|
Returns bitcount for value-mask fields.
|
|
Otherwise, uses the value of the length field.
|
|
'''
|
|
lenexp = _c_accessor_get_length(expr, field_mapping)
|
|
|
|
if expr.op == '~':
|
|
return '(' + '~' + _c_accessor_get_expr(expr.rhs, field_mapping) + ')'
|
|
elif expr.op == 'popcount':
|
|
return 'xcb_popcount(' + _c_accessor_get_expr(expr.rhs, field_mapping) + ')'
|
|
elif expr.op == 'enumref':
|
|
enum_name = expr.lenfield_type.name
|
|
constant_name = expr.lenfield_name
|
|
c_name = _n(enum_name + (constant_name,)).upper()
|
|
return c_name
|
|
elif expr.op == 'sumof':
|
|
# locate the referenced list object
|
|
list_obj = expr.lenfield_type
|
|
field = None
|
|
for f in expr.lenfield_parent.fields:
|
|
if f.field_name == expr.lenfield_name:
|
|
field = f
|
|
break
|
|
|
|
if field is None:
|
|
raise Exception("list field '%s' referenced by sumof not found" % expr.lenfield_name)
|
|
list_name = field_mapping[field.c_field_name][0]
|
|
c_length_func = "%s(%s)" % (field.c_length_name, list_name)
|
|
# note: xcb_sumof() has only been defined for integers
|
|
c_length_func = _c_accessor_get_expr(field.type.expr, field_mapping)
|
|
return 'xcb_sumof(%s, %s)' % (list_name, c_length_func)
|
|
elif expr.op != None:
|
|
return ('(' + _c_accessor_get_expr(expr.lhs, field_mapping) +
|
|
' ' + expr.op + ' ' +
|
|
_c_accessor_get_expr(expr.rhs, field_mapping) + ')')
|
|
elif expr.bitfield:
|
|
return 'xcb_popcount(' + lenexp + ')'
|
|
else:
|
|
return lenexp
|
|
|
|
def _c_accessors_field(self, field):
|
|
'''
|
|
Declares the accessor functions for a non-list field that follows a variable-length field.
|
|
'''
|
|
c_type = self.c_type
|
|
|
|
# special case: switch
|
|
switch_obj = self if self.is_switch else None
|
|
if self.is_bitcase:
|
|
switch_obj = self.parents[-1]
|
|
if switch_obj is not None:
|
|
c_type = switch_obj.c_type
|
|
|
|
if field.type.is_simple:
|
|
_hc('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' ** ')
|
|
_hc(' ** %s %s', field.c_field_type, field.c_accessor_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param const %s *R', c_type)
|
|
_hc(' ** @returns %s', field.c_field_type)
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
_hc('%s', field.c_field_type)
|
|
_h('%s (const %s *R /**< */);', field.c_accessor_name, c_type)
|
|
_c('%s (const %s *R /**< */)', field.c_accessor_name, c_type)
|
|
_c('{')
|
|
if field.prev_varsized_field is None:
|
|
_c(' return (%s *) (R + 1);', field.c_field_type)
|
|
else:
|
|
_c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
|
|
_c(' return * (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);',
|
|
field.c_field_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)
|
|
_c('}')
|
|
else:
|
|
_hc('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** %s * %s', field.c_field_type, field.c_accessor_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param const %s *R', c_type)
|
|
_hc(' ** @returns %s *', field.c_field_type)
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
if field.type.is_switch and switch_obj is None:
|
|
return_type = 'void *'
|
|
else:
|
|
return_type = '%s *' % field.c_field_type
|
|
|
|
_hc(return_type)
|
|
_h('%s (const %s *R /**< */);', field.c_accessor_name, c_type)
|
|
_c('%s (const %s *R /**< */)', field.c_accessor_name, c_type)
|
|
_c('{')
|
|
if field.prev_varsized_field is None:
|
|
_c(' return (%s) (R + 1);', return_type)
|
|
# note: the special case 'variable fields followed by fixed size fields'
|
|
# is not of any consequence here, since the ordering gets
|
|
# 'corrected' in the reply function
|
|
else:
|
|
_c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
|
|
_c(' return (%s) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);',
|
|
return_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)
|
|
_c('}')
|
|
|
|
|
|
def _c_accessors_list(self, field):
|
|
'''
|
|
Declares the accessor functions for a list field.
|
|
Declares a direct-accessor function only if the list members are fixed size.
|
|
Declares length and get-iterator functions always.
|
|
'''
|
|
list = field.type
|
|
c_type = self.c_type
|
|
|
|
# special case: switch
|
|
# in case of switch, 2 params have to be supplied to certain accessor functions:
|
|
# 1. the anchestor object (request or reply)
|
|
# 2. the (anchestor) switch object
|
|
# the reason is that switch is either a child of a request/reply or nested in another switch,
|
|
# so whenever we need to access a length field, we might need to refer to some anchestor type
|
|
switch_obj = self if self.is_switch else None
|
|
if self.is_bitcase:
|
|
switch_obj = self.parents[-1]
|
|
if switch_obj is not None:
|
|
c_type = switch_obj.c_type
|
|
|
|
params = []
|
|
fields = {}
|
|
parents = self.parents if hasattr(self, 'parents') else [self]
|
|
# 'R': parents[0] is always the 'toplevel' container type
|
|
params.append(('const %s *R' % parents[0].c_type, parents[0]))
|
|
fields.update(_c_helper_field_mapping(parents[0], [('R', '->', parents[0])], flat=True))
|
|
# auxiliary object for 'R' parameters
|
|
R_obj = parents[0]
|
|
|
|
if switch_obj is not None:
|
|
# now look where the fields are defined that are needed to evaluate
|
|
# the switch expr, and store the parent objects in accessor_params and
|
|
# the fields in switch_fields
|
|
|
|
# 'S': name for the 'toplevel' switch
|
|
toplevel_switch = parents[1]
|
|
params.append(('const %s *S' % toplevel_switch.c_type, toplevel_switch))
|
|
fields.update(_c_helper_field_mapping(toplevel_switch, [('S', '->', toplevel_switch)], flat=True))
|
|
|
|
# initialize prefix for everything "below" S
|
|
prefix_str = '/* %s */ S' % toplevel_switch.name[-1]
|
|
prefix = [(prefix_str, '->', toplevel_switch)]
|
|
|
|
# look for fields in the remaining containers
|
|
for p in parents[2:] + [self]:
|
|
# the separator between parent and child is always '.' here,
|
|
# because of nested switch statements
|
|
if not p.is_bitcase or (p.is_bitcase and p.has_name):
|
|
prefix.append((p.name[-1], '.', p))
|
|
fields.update(_c_helper_field_mapping(p, prefix, flat=True))
|
|
|
|
# auxiliary object for 'S' parameter
|
|
S_obj = parents[1]
|
|
|
|
_h_setlevel(1)
|
|
_c_setlevel(1)
|
|
if list.member.fixed_size():
|
|
idx = 1 if switch_obj is not None else 0
|
|
_hc('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** %s * %s', field.c_field_type, field.c_accessor_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param %s', params[idx][0])
|
|
_hc(' ** @returns %s *', field.c_field_type)
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
_hc('%s *', field.c_field_type)
|
|
|
|
_h('%s (%s /**< */);', field.c_accessor_name, params[idx][0])
|
|
_c('%s (%s /**< */)', field.c_accessor_name, params[idx][0])
|
|
|
|
_c('{')
|
|
if switch_obj is not None:
|
|
_c(' return %s;', fields[field.c_field_name][0])
|
|
elif field.prev_varsized_field is None:
|
|
_c(' return (%s *) (R + 1);', field.c_field_type)
|
|
else:
|
|
_c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
|
|
_c(' return (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);',
|
|
field.c_field_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)
|
|
_c('}')
|
|
|
|
_hc('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** int %s', field.c_length_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param const %s *R', c_type)
|
|
_hc(' ** @returns int')
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
_hc('int')
|
|
if switch_obj is not None:
|
|
_hc('%s (const %s *R /**< */,', field.c_length_name, R_obj.c_type)
|
|
spacing = ' '*(len(field.c_length_name)+2)
|
|
_h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
|
|
_c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
|
|
length = _c_accessor_get_expr(field.type.expr, fields)
|
|
else:
|
|
_h('%s (const %s *R /**< */);', field.c_length_name, c_type)
|
|
_c('%s (const %s *R /**< */)', field.c_length_name, c_type)
|
|
length = _c_accessor_get_expr(field.type.expr, fields)
|
|
_c('{')
|
|
_c(' return %s;', length)
|
|
_c('}')
|
|
|
|
if field.type.member.is_simple:
|
|
_hc('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** xcb_generic_iterator_t %s', field.c_end_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param const %s *R', c_type)
|
|
_hc(' ** @returns xcb_generic_iterator_t')
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
_hc('xcb_generic_iterator_t')
|
|
if switch_obj is not None:
|
|
_hc('%s (const %s *R /**< */,', field.c_end_name, R_obj.c_type)
|
|
spacing = ' '*(len(field.c_end_name)+2)
|
|
_h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
|
|
_c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
|
|
else:
|
|
_h('%s (const %s *R /**< */);', field.c_end_name, c_type)
|
|
_c('%s (const %s *R /**< */)', field.c_end_name, c_type)
|
|
_c('{')
|
|
_c(' xcb_generic_iterator_t i;')
|
|
|
|
param = 'R' if switch_obj is None else 'S'
|
|
if switch_obj is not None:
|
|
_c(' i.data = %s + %s;', fields[field.c_field_name][0],
|
|
_c_accessor_get_expr(field.type.expr, fields))
|
|
elif field.prev_varsized_field == None:
|
|
_c(' i.data = ((%s *) (R + 1)) + (%s);', field.type.c_wiretype,
|
|
_c_accessor_get_expr(field.type.expr, fields))
|
|
else:
|
|
_c(' xcb_generic_iterator_t child = %s;',
|
|
_c_iterator_get_end(field.prev_varsized_field, 'R'))
|
|
_c(' i.data = ((%s *) child.data) + (%s);', field.type.c_wiretype,
|
|
_c_accessor_get_expr(field.type.expr, fields))
|
|
|
|
_c(' i.rem = 0;')
|
|
_c(' i.index = (char *) i.data - (char *) %s;', param)
|
|
_c(' return i;')
|
|
_c('}')
|
|
|
|
else:
|
|
_hc('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** %s %s', field.c_iterator_type, field.c_iterator_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param const %s *R', c_type)
|
|
_hc(' ** @returns %s', field.c_iterator_type)
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
|
|
_hc('%s', field.c_iterator_type)
|
|
if switch_obj is not None:
|
|
_hc('%s (const %s *R /**< */,', field.c_iterator_name, R_obj.c_type)
|
|
spacing = ' '*(len(field.c_iterator_name)+2)
|
|
_h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
|
|
_c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
|
|
else:
|
|
_h('%s (const %s *R /**< */);', field.c_iterator_name, c_type)
|
|
_c('%s (const %s *R /**< */)', field.c_iterator_name, c_type)
|
|
_c('{')
|
|
_c(' %s i;', field.c_iterator_type)
|
|
|
|
if switch_obj is not None:
|
|
_c(' i.data = %s;', fields[field.c_field_name][0])
|
|
_c(' i.rem = %s;', _c_accessor_get_expr(field.type.expr, fields))
|
|
elif field.prev_varsized_field == None:
|
|
_c(' i.data = (%s *) (R + 1);', field.c_field_type)
|
|
else:
|
|
_c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
|
|
_c(' i.data = (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index));',
|
|
field.c_field_type, field.c_field_type)
|
|
if switch_obj is None:
|
|
_c(' i.rem = %s;', _c_accessor_get_expr(field.type.expr, fields))
|
|
_c(' i.index = (char *) i.data - (char *) %s;', 'R' if switch_obj is None else 'S' )
|
|
_c(' return i;')
|
|
_c('}')
|
|
|
|
def _c_accessors(self, name, base):
|
|
'''
|
|
Declares the accessor functions for the fields of a structure.
|
|
'''
|
|
# no accessors for switch itself -
|
|
# switch always needs to be unpacked explicitly
|
|
# if self.is_switch:
|
|
# pass
|
|
# else:
|
|
if True:
|
|
for field in self.fields:
|
|
if field.type.is_list and not field.type.fixed_size():
|
|
_c_accessors_list(self, field)
|
|
elif field.prev_varsized_field is not None or not field.type.fixed_size():
|
|
_c_accessors_field(self, field)
|
|
|
|
def c_simple(self, name):
|
|
'''
|
|
Exported function that handles cardinal type declarations.
|
|
These are types which are typedef'd to one of the CARDx's, char, float, etc.
|
|
'''
|
|
_c_type_setup(self, name, ())
|
|
|
|
if (self.name != name):
|
|
# Typedef
|
|
_h_setlevel(0)
|
|
my_name = _t(name)
|
|
_h('')
|
|
_h('typedef %s %s;', _t(self.name), my_name)
|
|
|
|
# Iterator
|
|
_c_iterator(self, name)
|
|
|
|
def _c_complex(self):
|
|
'''
|
|
Helper function for handling all structure types.
|
|
Called for all structs, requests, replies, events, errors.
|
|
'''
|
|
_h_setlevel(0)
|
|
_h('')
|
|
_h('/**')
|
|
_h(' * @brief %s', self.c_type)
|
|
_h(' **/')
|
|
_h('typedef %s %s {', self.c_container, self.c_type)
|
|
|
|
struct_fields = []
|
|
maxtypelen = 0
|
|
|
|
varfield = None
|
|
for field in self.fields:
|
|
if not field.type.fixed_size() and not self.is_switch and not self.is_union:
|
|
varfield = field.c_field_name
|
|
continue
|
|
if field.wire:
|
|
struct_fields.append(field)
|
|
|
|
for field in struct_fields:
|
|
length = len(field.c_field_type)
|
|
# account for '*' pointer_spec
|
|
if not field.type.fixed_size():
|
|
length += 1
|
|
maxtypelen = max(maxtypelen, length)
|
|
|
|
def _c_complex_field(self, field, space=''):
|
|
if (field.type.fixed_size() or
|
|
# in case of switch with switch children, don't make the field a pointer
|
|
# necessary for unserialize to work
|
|
(self.is_switch and field.type.is_switch)):
|
|
spacing = ' ' * (maxtypelen - len(field.c_field_type))
|
|
_h('%s %s%s %s%s; /**< */', space, field.c_field_type, spacing, field.c_field_name, field.c_subscript)
|
|
else:
|
|
spacing = ' ' * (maxtypelen - (len(field.c_field_type) + 1))
|
|
_h('%s %s%s *%s%s; /**< */', space, field.c_field_type, spacing, field.c_field_name, field.c_subscript)
|
|
|
|
if not self.is_switch:
|
|
for field in struct_fields:
|
|
_c_complex_field(self, field)
|
|
else:
|
|
for b in self.bitcases:
|
|
space = ''
|
|
if b.type.has_name:
|
|
_h(' struct _%s {', b.c_field_name)
|
|
space = ' '
|
|
for field in b.type.fields:
|
|
_c_complex_field(self, field, space)
|
|
if b.type.has_name:
|
|
_h(' } %s;', b.c_field_name)
|
|
|
|
_h('} %s;', self.c_type)
|
|
|
|
def c_struct(self, name):
|
|
'''
|
|
Exported function that handles structure declarations.
|
|
'''
|
|
_c_type_setup(self, name, ())
|
|
_c_complex(self)
|
|
_c_accessors(self, name, name)
|
|
_c_iterator(self, name)
|
|
|
|
def c_union(self, name):
|
|
'''
|
|
Exported function that handles union declarations.
|
|
'''
|
|
_c_type_setup(self, name, ())
|
|
_c_complex(self)
|
|
_c_iterator(self, name)
|
|
|
|
def _c_request_helper(self, name, cookie_type, void, regular, aux=False):
|
|
'''
|
|
Declares a request function.
|
|
'''
|
|
|
|
# Four stunningly confusing possibilities here:
|
|
#
|
|
# Void Non-void
|
|
# ------------------------------
|
|
# "req" "req"
|
|
# 0 flag CHECKED flag Normal Mode
|
|
# void_cookie req_cookie
|
|
# ------------------------------
|
|
# "req_checked" "req_unchecked"
|
|
# CHECKED flag 0 flag Abnormal Mode
|
|
# void_cookie req_cookie
|
|
# ------------------------------
|
|
|
|
|
|
# Whether we are _checked or _unchecked
|
|
checked = void and not regular
|
|
unchecked = not void and not regular
|
|
|
|
# What kind of cookie we return
|
|
func_cookie = 'xcb_void_cookie_t' if void else self.c_cookie_type
|
|
|
|
# What flag is passed to xcb_request
|
|
func_flags = '0' if (void and regular) or (not void and not regular) else 'XCB_REQUEST_CHECKED'
|
|
|
|
# Global extension id variable or NULL for xproto
|
|
func_ext_global = '&' + _ns.c_ext_global_name if _ns.is_ext else '0'
|
|
|
|
# What our function name is
|
|
func_name = self.c_request_name if not aux else self.c_aux_name
|
|
if checked:
|
|
func_name = self.c_checked_name if not aux else self.c_aux_checked_name
|
|
if unchecked:
|
|
func_name = self.c_unchecked_name if not aux else self.c_aux_unchecked_name
|
|
|
|
param_fields = []
|
|
wire_fields = []
|
|
maxtypelen = len('xcb_connection_t')
|
|
serial_fields = []
|
|
# special case: list with variable size elements
|
|
list_with_var_size_elems = False
|
|
|
|
for field in self.fields:
|
|
if field.visible:
|
|
# The field should appear as a call parameter
|
|
param_fields.append(field)
|
|
if field.wire and not field.auto:
|
|
# We need to set the field up in the structure
|
|
wire_fields.append(field)
|
|
if field.type.need_serialize or field.type.need_sizeof:
|
|
serial_fields.append(field)
|
|
|
|
for field in param_fields:
|
|
c_field_const_type = field.c_field_const_type
|
|
if field.type.need_serialize and not aux:
|
|
c_field_const_type = "const void"
|
|
if len(c_field_const_type) > maxtypelen:
|
|
maxtypelen = len(c_field_const_type)
|
|
if field.type.is_list and not field.type.member.fixed_size():
|
|
list_with_var_size_elems = True
|
|
|
|
_h_setlevel(1)
|
|
_c_setlevel(1)
|
|
_h('')
|
|
_h('/**')
|
|
_h(' * Delivers a request to the X server')
|
|
_h(' * @param c The connection')
|
|
_h(' * @return A cookie')
|
|
_h(' *')
|
|
_h(' * Delivers a request to the X server.')
|
|
_h(' * ')
|
|
if checked:
|
|
_h(' * This form can be used only if the request will not cause')
|
|
_h(' * a reply to be generated. Any returned error will be')
|
|
_h(' * saved for handling by xcb_request_check().')
|
|
if unchecked:
|
|
_h(' * This form can be used only if the request will cause')
|
|
_h(' * a reply to be generated. Any returned error will be')
|
|
_h(' * placed in the event queue.')
|
|
_h(' */')
|
|
_c('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** %s %s', cookie_type, func_name)
|
|
_hc(' ** ')
|
|
|
|
spacing = ' ' * (maxtypelen - len('xcb_connection_t'))
|
|
_hc(' ** @param xcb_connection_t%s *c', spacing)
|
|
|
|
for field in param_fields:
|
|
c_field_const_type = field.c_field_const_type
|
|
if field.type.need_serialize and not aux:
|
|
c_field_const_type = "const void"
|
|
spacing = ' ' * (maxtypelen - len(c_field_const_type))
|
|
_hc(' ** @param %s%s %s%s', c_field_const_type, spacing, field.c_pointer, field.c_field_name)
|
|
|
|
_hc(' ** @returns %s', cookie_type)
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
_hc('%s', cookie_type)
|
|
|
|
spacing = ' ' * (maxtypelen - len('xcb_connection_t'))
|
|
comma = ',' if len(param_fields) else ');'
|
|
_h('%s (xcb_connection_t%s *c /**< */%s', func_name, spacing, comma)
|
|
comma = ',' if len(param_fields) else ')'
|
|
_c('%s (xcb_connection_t%s *c /**< */%s', func_name, spacing, comma)
|
|
|
|
func_spacing = ' ' * (len(func_name) + 2)
|
|
count = len(param_fields)
|
|
for field in param_fields:
|
|
count = count - 1
|
|
c_field_const_type = field.c_field_const_type
|
|
c_pointer = field.c_pointer
|
|
if field.type.need_serialize and not aux:
|
|
c_field_const_type = "const void"
|
|
c_pointer = '*'
|
|
spacing = ' ' * (maxtypelen - len(c_field_const_type))
|
|
comma = ',' if count else ');'
|
|
_h('%s%s%s %s%s /**< */%s', func_spacing, c_field_const_type,
|
|
spacing, c_pointer, field.c_field_name, comma)
|
|
comma = ',' if count else ')'
|
|
_c('%s%s%s %s%s /**< */%s', func_spacing, c_field_const_type,
|
|
spacing, c_pointer, field.c_field_name, comma)
|
|
|
|
count = 2
|
|
if not self.var_followed_by_fixed_fields:
|
|
for field in param_fields:
|
|
if not field.type.fixed_size():
|
|
count = count + 2
|
|
if field.type.need_serialize:
|
|
# _serialize() keeps track of padding automatically
|
|
count -= 1
|
|
dimension = count + 2
|
|
|
|
_c('{')
|
|
_c(' static const xcb_protocol_request_t xcb_req = {')
|
|
_c(' /* count */ %d,', count)
|
|
_c(' /* ext */ %s,', func_ext_global)
|
|
_c(' /* opcode */ %s,', self.c_request_name.upper())
|
|
_c(' /* isvoid */ %d', 1 if void else 0)
|
|
_c(' };')
|
|
_c(' ')
|
|
|
|
_c(' struct iovec xcb_parts[%d];', dimension)
|
|
_c(' %s xcb_ret;', func_cookie)
|
|
_c(' %s xcb_out;', self.c_type)
|
|
if self.var_followed_by_fixed_fields:
|
|
_c(' /* in the protocol description, variable size fields are followed by fixed size fields */')
|
|
_c(' void *xcb_aux = 0;')
|
|
|
|
|
|
for idx, f in enumerate(serial_fields):
|
|
if aux:
|
|
_c(' void *xcb_aux%d = 0;' % (idx))
|
|
if list_with_var_size_elems:
|
|
_c(' unsigned int i;')
|
|
_c(' unsigned int xcb_tmp_len;')
|
|
_c(' char *xcb_tmp;')
|
|
_c(' ')
|
|
# simple request call tracing
|
|
# _c(' printf("in function %s\\n");' % func_name)
|
|
|
|
# fixed size fields
|
|
for field in wire_fields:
|
|
if field.type.fixed_size():
|
|
if field.type.is_expr:
|
|
_c(' xcb_out.%s = %s;', field.c_field_name, _c_accessor_get_expr(field.type.expr, None))
|
|
elif field.type.is_pad:
|
|
if field.type.nmemb == 1:
|
|
_c(' xcb_out.%s = 0;', field.c_field_name)
|
|
else:
|
|
_c(' memset(xcb_out.%s, 0, %d);', field.c_field_name, field.type.nmemb)
|
|
else:
|
|
if field.type.nmemb == 1:
|
|
_c(' xcb_out.%s = %s;', field.c_field_name, field.c_field_name)
|
|
else:
|
|
_c(' memcpy(xcb_out.%s, %s, %d);', field.c_field_name, field.c_field_name, field.type.nmemb)
|
|
|
|
def get_serialize_args(type_obj, c_field_name, aux_var, context='serialize'):
|
|
serialize_args = get_serialize_params(context, type_obj,
|
|
c_field_name,
|
|
aux_var)[2]
|
|
return reduce(lambda x,y: "%s, %s" % (x,y), [a[2] for a in serialize_args])
|
|
|
|
# calls in order to free dyn. all. memory
|
|
free_calls = []
|
|
|
|
_c(' ')
|
|
if not self.var_followed_by_fixed_fields:
|
|
_c(' xcb_parts[2].iov_base = (char *) &xcb_out;')
|
|
_c(' xcb_parts[2].iov_len = sizeof(xcb_out);')
|
|
_c(' xcb_parts[3].iov_base = 0;')
|
|
_c(' xcb_parts[3].iov_len = -xcb_parts[2].iov_len & 3;')
|
|
|
|
count = 4
|
|
|
|
for field in param_fields:
|
|
if not field.type.fixed_size():
|
|
_c(' /* %s %s */', field.type.c_type, field.c_field_name)
|
|
# default: simple cast to char *
|
|
if not field.type.need_serialize and not field.type.need_sizeof:
|
|
_c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
|
|
if field.type.is_list:
|
|
if field.type.member.fixed_size():
|
|
_c(' xcb_parts[%d].iov_len = %s * sizeof(%s);', count,
|
|
_c_accessor_get_expr(field.type.expr, None),
|
|
field.type.member.c_wiretype)
|
|
else:
|
|
list_length = _c_accessor_get_expr(field.type.expr, None)
|
|
|
|
length = ''
|
|
_c(" xcb_parts[%d].iov_len = 0;" % count)
|
|
_c(" xcb_tmp = (char *)%s;", field.c_field_name)
|
|
_c(" for(i=0; i<%s; i++) {" % list_length)
|
|
_c(" xcb_tmp_len = %s(xcb_tmp);" %
|
|
(field.type.c_sizeof_name))
|
|
_c(" xcb_parts[%d].iov_len += xcb_tmp_len;" % count)
|
|
_c(" xcb_tmp += xcb_tmp_len;")
|
|
_c(" }")
|
|
else:
|
|
# not supposed to happen
|
|
raise Exception("unhandled variable size field %s" % field.c_field_name)
|
|
else:
|
|
if not aux:
|
|
_c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
|
|
idx = serial_fields.index(field)
|
|
aux_var = '&xcb_aux%d' % idx
|
|
context = 'serialize' if aux else 'sizeof'
|
|
_c(' xcb_parts[%d].iov_len = ', count)
|
|
if aux:
|
|
serialize_args = get_serialize_args(field.type, aux_var, field.c_field_name, context)
|
|
_c(' %s (%s);', field.type.c_serialize_name, serialize_args)
|
|
_c(' xcb_parts[%d].iov_base = xcb_aux%d;' % (count, idx))
|
|
free_calls.append(' free(xcb_aux%d);' % idx)
|
|
else:
|
|
serialize_args = get_serialize_args(field.type, field.c_field_name, aux_var, context)
|
|
func_name = field.type.c_sizeof_name
|
|
_c(' %s (%s);', func_name, serialize_args)
|
|
|
|
count += 1
|
|
if not (field.type.need_serialize or field.type.need_sizeof):
|
|
# the _serialize() function keeps track of padding automatically
|
|
_c(' xcb_parts[%d].iov_base = 0;', count)
|
|
_c(' xcb_parts[%d].iov_len = -xcb_parts[%d].iov_len & 3;', count, count-1)
|
|
count += 1
|
|
|
|
# elif self.var_followed_by_fixed_fields:
|
|
else:
|
|
_c(' xcb_parts[2].iov_base = (char *) &xcb_out;')
|
|
# request header: opcodes + length
|
|
_c(' xcb_parts[2].iov_len = 2*sizeof(uint8_t) + sizeof(uint16_t);')
|
|
count += 1
|
|
# call _serialize()
|
|
buffer_var = '&xcb_aux'
|
|
serialize_args = get_serialize_args(self, buffer_var, '&xcb_out', 'serialize')
|
|
_c(' xcb_parts[%d].iov_len = %s (%s);', count, self.c_serialize_name, serialize_args)
|
|
_c(' xcb_parts[%d].iov_base = (char *) xcb_aux;', count)
|
|
free_calls.append(' free(xcb_aux);')
|
|
# no padding necessary - _serialize() keeps track of padding automatically
|
|
|
|
_c(' ')
|
|
_c(' xcb_ret.sequence = xcb_send_request(c, %s, xcb_parts + 2, &xcb_req);', func_flags)
|
|
|
|
# free dyn. all. data, if any
|
|
for f in free_calls:
|
|
_c(f)
|
|
_c(' return xcb_ret;')
|
|
_c('}')
|
|
|
|
def _c_reply(self, name):
|
|
'''
|
|
Declares the function that returns the reply structure.
|
|
'''
|
|
spacing1 = ' ' * (len(self.c_cookie_type) - len('xcb_connection_t'))
|
|
spacing2 = ' ' * (len(self.c_cookie_type) - len('xcb_generic_error_t'))
|
|
spacing3 = ' ' * (len(self.c_reply_name) + 2)
|
|
|
|
# check if _unserialize() has to be called for any field
|
|
def look_for_special_cases(complex_obj):
|
|
unserialize_fields = []
|
|
# no unserialize call in case of switch
|
|
if not complex_obj.is_switch:
|
|
for field in complex_obj.fields:
|
|
# three cases: 1. field with special case
|
|
# 2. container that contains special case field
|
|
# 3. list with special case elements
|
|
if field.type.var_followed_by_fixed_fields:
|
|
unserialize_fields.append(field)
|
|
elif field.type.is_container:
|
|
unserialize_fields += look_for_special_cases(field.type)
|
|
elif field.type.is_list:
|
|
if field.type.member.var_followed_by_fixed_fields:
|
|
unserialize_fields.append(field)
|
|
if field.type.member.is_container:
|
|
unserialize_fields += look_for_special_cases(field.type.member)
|
|
return unserialize_fields
|
|
|
|
unserialize_fields = look_for_special_cases(self.reply)
|
|
|
|
_h('')
|
|
_h('/**')
|
|
_h(' * Return the reply')
|
|
_h(' * @param c The connection')
|
|
_h(' * @param cookie The cookie')
|
|
_h(' * @param e The xcb_generic_error_t supplied')
|
|
_h(' *')
|
|
_h(' * Returns the reply of the request asked by')
|
|
_h(' * ')
|
|
_h(' * The parameter @p e supplied to this function must be NULL if')
|
|
_h(' * %s(). is used.', self.c_unchecked_name)
|
|
_h(' * Otherwise, it stores the error if any.')
|
|
_h(' *')
|
|
_h(' * The returned value must be freed by the caller using free().')
|
|
_h(' */')
|
|
_c('')
|
|
_hc('')
|
|
_hc('/*****************************************************************************')
|
|
_hc(' **')
|
|
_hc(' ** %s * %s', self.c_reply_type, self.c_reply_name)
|
|
_hc(' ** ')
|
|
_hc(' ** @param xcb_connection_t%s *c', spacing1)
|
|
_hc(' ** @param %s cookie', self.c_cookie_type)
|
|
_hc(' ** @param xcb_generic_error_t%s **e', spacing2)
|
|
_hc(' ** @returns %s *', self.c_reply_type)
|
|
_hc(' **')
|
|
_hc(' *****************************************************************************/')
|
|
_hc(' ')
|
|
_hc('%s *', self.c_reply_type)
|
|
_hc('%s (xcb_connection_t%s *c /**< */,', self.c_reply_name, spacing1)
|
|
_hc('%s%s cookie /**< */,', spacing3, self.c_cookie_type)
|
|
_h('%sxcb_generic_error_t%s **e /**< */);', spacing3, spacing2)
|
|
_c('%sxcb_generic_error_t%s **e /**< */)', spacing3, spacing2)
|
|
_c('{')
|
|
|
|
if len(unserialize_fields)>0:
|
|
# certain variable size fields need to be unserialized explicitly
|
|
_c(' %s *reply = (%s *) xcb_wait_for_reply(c, cookie.sequence, e);',
|
|
self.c_reply_type, self.c_reply_type)
|
|
_c(' int i;')
|
|
for field in unserialize_fields:
|
|
if field.type.is_list:
|
|
_c(' %s %s_iter = %s(reply);', field.c_iterator_type, field.c_field_name, field.c_iterator_name)
|
|
_c(' int %s_len = %s(reply);', field.c_field_name, field.c_length_name)
|
|
_c(' %s *%s_data;', field.c_field_type, field.c_field_name)
|
|
else:
|
|
raise Exception('not implemented: call _unserialize() in reply for non-list type %s', field.c_field_type)
|
|
# call _unserialize(), using the reply as source and target buffer
|
|
_c(' /* special cases: transform parts of the reply to match XCB data structures */')
|
|
for field in unserialize_fields:
|
|
if field.type.is_list:
|
|
_c(' for(i=0; i<%s_len; i++) {', field.c_field_name)
|
|
_c(' %s_data = %s_iter.data;', field.c_field_name, field.c_field_name)
|
|
_c(' %s((const void *)%s_data, &%s_data);', field.type.c_unserialize_name,
|
|
field.c_field_name, field.c_field_name)
|
|
_c(' %s(&%s_iter);', field.type.c_next_name, field.c_field_name)
|
|
_c(' }')
|
|
# return the transformed reply
|
|
_c(' return reply;')
|
|
|
|
else:
|
|
_c(' return (%s *) xcb_wait_for_reply(c, cookie.sequence, e);', self.c_reply_type)
|
|
|
|
_c('}')
|
|
|
|
def _c_opcode(name, opcode):
|
|
'''
|
|
Declares the opcode define for requests, events, and errors.
|
|
'''
|
|
_h_setlevel(0)
|
|
_h('')
|
|
_h('/** Opcode for %s. */', _n(name))
|
|
_h('#define %s %s', _n(name).upper(), opcode)
|
|
|
|
def _c_cookie(self, name):
|
|
'''
|
|
Declares the cookie type for a non-void request.
|
|
'''
|
|
_h_setlevel(0)
|
|
_h('')
|
|
_h('/**')
|
|
_h(' * @brief %s', self.c_cookie_type)
|
|
_h(' **/')
|
|
_h('typedef struct %s {', self.c_cookie_type)
|
|
_h(' unsigned int sequence; /**< */')
|
|
_h('} %s;', self.c_cookie_type)
|
|
|
|
def c_request(self, name):
|
|
'''
|
|
Exported function that handles request declarations.
|
|
'''
|
|
_c_type_setup(self, name, ('request',))
|
|
|
|
if self.reply:
|
|
# Cookie type declaration
|
|
_c_cookie(self, name)
|
|
|
|
# Opcode define
|
|
_c_opcode(name, self.opcode)
|
|
|
|
# Request structure declaration
|
|
_c_complex(self)
|
|
|
|
if self.reply:
|
|
_c_type_setup(self.reply, name, ('reply',))
|
|
# Reply structure definition
|
|
_c_complex(self.reply)
|
|
# Request prototypes
|
|
_c_request_helper(self, name, self.c_cookie_type, False, True)
|
|
_c_request_helper(self, name, self.c_cookie_type, False, False)
|
|
if self.need_aux:
|
|
_c_request_helper(self, name, self.c_cookie_type, False, True, True)
|
|
_c_request_helper(self, name, self.c_cookie_type, False, False, True)
|
|
# Reply accessors
|
|
_c_accessors(self.reply, name + ('reply',), name)
|
|
_c_reply(self, name)
|
|
else:
|
|
# Request prototypes
|
|
_c_request_helper(self, name, 'xcb_void_cookie_t', True, False)
|
|
_c_request_helper(self, name, 'xcb_void_cookie_t', True, True)
|
|
if self.need_aux:
|
|
_c_request_helper(self, name, 'xcb_void_cookie_t', True, False, True)
|
|
_c_request_helper(self, name, 'xcb_void_cookie_t', True, True, True)
|
|
|
|
|
|
def c_event(self, name):
|
|
'''
|
|
Exported function that handles event declarations.
|
|
'''
|
|
_c_type_setup(self, name, ('event',))
|
|
|
|
# Opcode define
|
|
_c_opcode(name, self.opcodes[name])
|
|
|
|
if self.name == name:
|
|
# Structure definition
|
|
_c_complex(self)
|
|
else:
|
|
# Typedef
|
|
_h('')
|
|
_h('typedef %s %s;', _t(self.name + ('event',)), _t(name + ('event',)))
|
|
|
|
def c_error(self, name):
|
|
'''
|
|
Exported function that handles error declarations.
|
|
'''
|
|
_c_type_setup(self, name, ('error',))
|
|
|
|
# Opcode define
|
|
_c_opcode(name, self.opcodes[name])
|
|
|
|
if self.name == name:
|
|
# Structure definition
|
|
_c_complex(self)
|
|
else:
|
|
# Typedef
|
|
_h('')
|
|
_h('typedef %s %s;', _t(self.name + ('error',)), _t(name + ('error',)))
|
|
|
|
|
|
# Main routine starts here
|
|
|
|
# Must create an "output" dictionary before any xcbgen imports.
|
|
output = {'open' : c_open,
|
|
'close' : c_close,
|
|
'simple' : c_simple,
|
|
'enum' : c_enum,
|
|
'struct' : c_struct,
|
|
'union' : c_union,
|
|
'request' : c_request,
|
|
'event' : c_event,
|
|
'error' : c_error,
|
|
}
|
|
|
|
# Boilerplate below this point
|
|
|
|
# Check for the argument that specifies path to the xcbgen python package.
|
|
try:
|
|
opts, args = getopt.getopt(sys.argv[1:], 'p:')
|
|
except getopt.GetoptError, err:
|
|
print str(err)
|
|
print 'Usage: c_client.py [-p path] file.xml'
|
|
sys.exit(1)
|
|
|
|
for (opt, arg) in opts:
|
|
if opt == '-p':
|
|
sys.path.append(arg)
|
|
|
|
# Import the module class
|
|
try:
|
|
from xcbgen.state import Module
|
|
except ImportError:
|
|
print ''
|
|
print 'Failed to load the xcbgen Python package!'
|
|
print 'Make sure that xcb/proto installed it on your Python path.'
|
|
print 'If not, you will need to create a .pth file or define $PYTHONPATH'
|
|
print 'to extend the path.'
|
|
print 'Refer to the README file in xcb/proto for more info.'
|
|
print ''
|
|
raise
|
|
|
|
# Parse the xml header
|
|
module = Module(args[0], output)
|
|
|
|
# Build type-registry and resolve type dependencies
|
|
module.register()
|
|
module.resolve()
|
|
|
|
# Output the code
|
|
module.generate()
|