#!/usr/bin/env python
from xml.etree.cElementTree import *
-from sys import argv
from os.path import basename
+import getopt
+import sys
import re
# Jump to the bottom of this file for the main routine
_cplusplus_annoyances = {'class' : '_class',
'new' : '_new',
'delete': '_delete'}
+_c_keywords = {'default' : '_default'}
-_cardinal_types = ['CARD8', 'uint8_t',
- 'CARD16','uint16_t',
- 'CARD32','uint32_t',
- 'INT8', 'int8_t',
- 'INT16', 'int16_t',
- 'INT32', 'int32_t',
- 'BYTE',
- 'BOOL',
- 'char',
- 'void',
- 'float',
- 'double']
_hlines = []
_hlevel = 0
_clines = []
_clevel = 0
_ns = None
+# global variable to keep track of serializers and switch data types
+# due to weird dependencies, I see no way to do this more elegant at the moment
+finished_serializers = []
+finished_sizeof = []
+finished_switch = []
+
def _h(fmt, *args):
'''
Writes the given line to the header file.
'''
if str in _cplusplus_annoyances:
return _cplusplus_annoyances[str]
+ elif str in _c_keywords:
+ return _c_keywords[str]
else:
return str
_ns = self.namespace
_ns.c_ext_global_name = _n(_ns.prefix + ('id',))
+ # Build the type-name collision avoidance table used by c_enum
+ build_collision_table()
+
_h_setlevel(0)
_c_setlevel(0)
_h('')
_h('#include "xcb.h"')
+ _c('#include <stdlib.h>')
_c('#include <string.h>')
_c('#include <assert.h>')
_c('#include "xcbext.h"')
for (n, h) in self.imports:
_hc('#include "%s.h"', h)
+ _h('')
+ _h('#ifdef __cplusplus')
+ _h('extern "C" {')
+ _h('#endif')
+
+ if _ns.is_ext:
_h('')
_h('#define XCB_%s_MAJOR_VERSION %s', _ns.ext_name.upper(), _ns.major_version)
_h('#define XCB_%s_MINOR_VERSION %s', _ns.ext_name.upper(), _ns.minor_version)
_h('extern xcb_extension_t %s;', _ns.c_ext_global_name)
_c('')
- _c('xcb_extension_t %s = { "%s" };', _ns.c_ext_global_name, _ns.ext_xname)
+ _c('xcb_extension_t %s = { "%s", 0 };', _ns.c_ext_global_name, _ns.ext_xname)
def c_close(self):
'''
_h_setlevel(2)
_c_setlevel(2)
_hc('')
+
+ _h('')
+ _h('#ifdef __cplusplus')
+ _h('}')
+ _h('#endif')
+
_h('')
_h('#endif')
_h('')
cfile.write('\n')
cfile.close()
+def build_collision_table():
+ global namecount
+ namecount = {}
+
+ for v in module.types.values():
+ name = _t(v[0])
+ namecount[name] = (namecount.get(name) or 0) + 1
+
def c_enum(self, name):
'''
Exported function that handles enum declarations.
'''
+
+ tname = _t(name)
+ if namecount[tname] > 1:
+ tname = _t(name + ('enum',))
+
_h_setlevel(0)
_h('')
- _h('typedef enum %s {', _t(name))
+ _h('typedef enum %s {', tname)
count = len(self.values)
comma = ',' if count > 0 else ''
_h(' %s%s%s%s', _n(name + (enam,)).upper(), equals, eval, comma)
- _h('} %s;', _t(name))
+ _h('} %s;', tname)
def _c_type_setup(self, name, postfix):
'''
self.c_reply_type = _t(name + ('reply',))
self.c_cookie_type = _t(name + ('cookie',))
- if self.is_container:
+ self.need_aux = False
+ self.need_serialize = False
+ self.need_sizeof = False
+
+ self.c_aux_name = _n(name + ('aux',))
+ self.c_aux_checked_name = _n(name + ('aux', 'checked'))
+ self.c_aux_unchecked_name = _n(name + ('aux', 'unchecked'))
+ self.c_serialize_name = _n(name + ('serialize',))
+ self.c_unserialize_name = _n(name + ('unserialize',))
+ self.c_unpack_name = _n(name + ('unpack',))
+ self.c_sizeof_name = _n(name + ('sizeof',))
+
+ # special case: structs where variable size fields are followed by fixed size fields
+ self.var_followed_by_fixed_fields = False
+
+ # whether a request or reply has a switch field
+ if self.is_switch:
+ self.need_serialize = True
+ self.c_container = 'struct'
+ for bitcase in self.bitcases:
+ bitcase.c_field_name = _cpp(bitcase.field_name)
+ _c_type_setup(bitcase.type, bitcase.field_type, ())
+
+ elif self.is_container:
self.c_container = 'union' if self.is_union else 'struct'
prev_varsized_field = None
_c_type_setup(field.type, field.field_type, ())
if field.type.is_list:
_c_type_setup(field.type.member, field.field_type, ())
+ if (field.type.nmemb is None):
+# if field.type.member.need_serialize:
+# self.need_serialize = True
+ self.need_sizeof = True
field.c_field_type = _t(field.field_type)
field.c_field_const_type = ('' if field.type.nmemb == 1 else 'const ') + field.c_field_type
field.c_subscript = '[%d]' % field.type.nmemb if (field.type.nmemb > 1) else ''
field.c_pointer = ' ' if field.type.nmemb == 1 else '*'
+ # correct the c_pointer field for variable size non-list types
+ if not field.type.fixed_size() and field.c_pointer == ' ':
+ field.c_pointer = '*'
+ if field.type.is_list and not field.type.member.fixed_size():
+ field.c_pointer = '*'
+
+ if field.type.is_switch:
+ field.c_pointer = '*'
+ field.c_field_const_type = 'const ' + field.c_field_type
+ self.need_aux = True
+ elif not field.type.fixed_size() and not field.type.is_bitcase:
+ #self.need_serialize = True
+ self.need_sizeof = True
+
field.c_iterator_type = _t(field.field_type + ('iterator',)) # xcb_fieldtype_iterator_t
field.c_iterator_name = _n(name + (field.field_name, 'iterator')) # xcb_container_field_iterator
field.c_accessor_name = _n(name + (field.field_name,)) # xcb_container_field
field.c_length_name = _n(name + (field.field_name, 'length')) # xcb_container_field_length
+
field.c_end_name = _n(name + (field.field_name, 'end')) # xcb_container_field_end
field.prev_varsized_field = prev_varsized_field
if field.type.fixed_size():
prev_varsized_offset += field.type.size
+ # special case: intermixed fixed and variable size fields
+ if prev_varsized_field is not None and not field.type.is_pad and field.wire:
+ if not self.is_union:
+ self.need_serialize = True
+ self.var_followed_by_fixed_fields = True
else:
self.last_varsized_field = field
prev_varsized_field = field
- prev_varsized_offset = 0
+ prev_varsized_offset = 0
+
+ if self.var_followed_by_fixed_fields:
+ if field.type.fixed_size():
+ field.prev_varsized_field = None
+
+ if self.need_serialize:
+ # when _unserialize() is wanted, create _sizeof() as well for consistency reasons
+ self.need_sizeof = True
+
+ # as switch does never appear at toplevel,
+ # continue here with type construction
+ if self.is_switch:
+ if self.c_type not in finished_switch:
+ finished_switch.append(self.c_type)
+ # special: switch C structs get pointer fields for variable-sized members
+ _c_complex(self)
+ # FIXME: what about accessors & switch (un)packing functions
+ # _c_iterator() does not seem to be the right place to do it,
+ # as the accessors would need any parameters to pass to _unpack() as well
+
+ if not self.is_bitcase:
+ if self.need_serialize:
+ if self.c_serialize_name not in finished_serializers:
+ finished_serializers.append(self.c_serialize_name)
+ _c_serialize(self)
+ # _unpack() and _unserialize() are only needed for special cases
+ if self.is_switch or self.var_followed_by_fixed_fields:
+ _c_unserialize(self)
+ if self.need_sizeof:
+ if self.c_sizeof_name not in finished_sizeof:
+ finished_sizeof.append(self.c_sizeof_name)
+ _c_sizeof_helper(self)
+# _c_type_setup()
+
+def get_request_fields(self):
+ 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!
+
+ return (param_fields, wire_fields)
+# get_request_fields()
+
+def get_expr_fields(self):
+ # get the fields referenced by switch or list expression
+ 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':
+ return [expr.lenfield_name]
+ 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 = get_expr_field_names(self.expr)
+ if unresolved_fields is None:
+ return []
+ expr_fields = dict.fromkeys(unresolved_fields)
+ for p in reversed(self.parent):
+ parent_fields = dict((f.field_name, f) for f in p.fields)
+ for f in parent_fields.keys():
+ if f in unresolved_fields:
+ expr_fields[f] = parent_fields[f]
+ unresolved_fields.remove(f)
+ if len(unresolved_fields) == 0:
+ break
+
+ if None in expr_fields.values():
+ raise Exception("could not resolve all fields for %s" % self.name)
+
+ params = expr_fields.values()
+ return params
+# get_expr_fields()
+
+def resolve_fields(anchestor, complex_obj=None):
+ """find fields referenced by anchestor or descendents with external scope"""
+ expr_fields = []
+ unresolved = []
+ all_fields = []
+ if complex_obj is None:
+ complex_obj = anchestor
+ 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_fields(anchestor, field.type)
+ # try to resolve expr fields
+ for e in expr_fields:
+ if e not in all_fields:
+ unresolved.append(e)
+ return unresolved
+# resolve_fields()
+
+def get_serialize_params(context, self, buffer_var='_buffer', aux_var='_aux'):
+ def add_param(params, param):
+ if param not in params:
+ params.append(param)
+
+ param_fields, wire_fields = get_request_fields(self)
+ if self.is_switch:
+ param_fields = get_expr_fields(self)
+
+ # _serialize function parameters
+ # cannot use set() for params, as series is important
+ params = []
+ if 'serialize' == context:
+ params.append(('void', '**', buffer_var))
+ elif context in ('unserialize', 'unpack', 'sizeof'):
+ params.append(('const void', '*', buffer_var))
+
+ # look for special cases
+ unresolved_fields = resolve_fields(self)
+ for f in unresolved_fields:
+ add_param(params, (f.c_field_type, '', f.c_field_name))
+
+ # make sure all required length fields are present
+ for p in param_fields:
+ 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))
+
+ # parameter fields if any
+ if self.is_switch:
+ for p in get_expr_fields(self):
+ typespec = p.c_field_const_type
+ pointerspec = p.c_pointer
+ add_param(params, (typespec, pointerspec, p.c_field_name))
+
+ # aux argument - structure to be serialized
+ 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))
+
+ 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_prefix(prefix, aux_var='_aux', aux_sep='->'):
+ # prefix is a list of (field_name, anchestor object) tuples
+ # concatenate field names
+ prefix_str = ''
+ for name, sep, obj in prefix:
+ prefix_str += name
+ if sep == '':
+ sep = '.' if (obj.is_bitcase and obj.has_name) else '->'
+ prefix_str += sep
+
+ lenfield_prefix = '' if prefix_str.find(aux_var)==0 else aux_var
+
+ if prefix_str != '':
+ if lenfield_prefix != '':
+ lenfield_prefix += aux_sep
+ lenfield_prefix += prefix_str
+ return (prefix_str, lenfield_prefix)
+# _c_serialize_helper_prefix
+
+def _c_field_mapping(context, complex_type, prefix):
+ def get_prefix(field, prefix):
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+ if prefix_str == '':
+ if context in ('serialize', 'unserialize'):
+ if field.type.fixed_size() or complex_type.is_switch:
+ prefix_str = '_aux->'
+ else:
+ raise Exception("unknown context '%s' in c_field_mapping" % context)
+ return prefix_str
+ # get_prefix()
+ def get_field_name(fields, complex_type, prefix):
+ for f in complex_type.fields:
+ prefix_str = get_prefix(f, prefix)
+
+ fname = "%s%s" % (prefix_str, f.c_field_name)
+ if fields.has_key(f.field_name):
+ raise Exception("field name %s has been registered before" % f.field_name)
+ fields[f.field_name] = (fname, f)
+ if f.type.is_container:
+ get_field_name(fields, f.type, prefix+[(f.c_field_name, '', f.type)])
+ # get_field_name()
+
+ # dict(field_name : (c_field_name, field))
+ fields = {}
+ get_field_name(fields, complex_type, prefix)
+
+ # switch: get the fields referenced by the switch expr as well
+ # these may not belong to any structure
+ if complex_type.is_switch:
+ pass
+# FIXME: fields += get_serialize_params(context, complex_type)
+
+ return fields
+# _c_field_mapping()
+
+def _c_serialize_helper_insert_padding(context, code_lines, space):
+ code_lines.append('%s xcb_buffer_len += xcb_block_len;' % space)
+ code_lines.append('%s /* padding */' % space)
+ code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
+ 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_buffer_len += 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)
+
+ 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_prefix = prefix + [(complex_name, '->', self)]
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(switch_prefix)
+ switch_expr = _c_accessor_get_expr(self.expr)
+
+ for b in self.bitcases:
+ bitcase_expr = _c_accessor_get_expr(b.type.expr, prefix_str)
+ code_lines.append(' if(%s & %s) {' % (switch_expr, bitcase_expr))
+ code_lines.append(' printf("entering bitcase section for %%%%d...\\n", %s);' % bitcase_expr)
+ b_prefix = switch_prefix
+ if b.type.has_name:
+ b_prefix = switch_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)
+ if 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):
+ # switch is handled by this function as a special case
+ param_fields, wire_fields, params = get_serialize_params(context, self)
+ args = get_expr_fields(field.type)
+ field_mapping = _c_field_mapping(context, self, prefix)
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ # determine which params to pass to _unserialize() and their prefixes
+ switch_len_fields = resolve_fields(self, field.type)
+ bitcase_unresolved = resolve_fields(self, self)
+ if len(bitcase_unresolved) != 0:
+ raise Exception('unresolved fields within bitcase is not supported at this point')
+ 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 for (un)serialize to cope with lists of variable length
+ """
+ expr = field.type.expr
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+ param_fields, wire_fields, params = get_serialize_params('sizeof', self)
+ param_names = [p[2] for p in params]
+
+ # look if the list's lenfield is a struct member or a function argument
+ # special case: if the list has a length field, its name will be returned
+ # unchanged by calling c_accessor_get_length(expr)
+ if expr.lenfield_name == _c_accessor_get_length(expr):
+ if expr.lenfield_name in param_names:
+ # the length field appears as separate argument in unserialize,
+ # so no need for a prefix
+ lenfield_prefix = ''
+ sep = '.' if (self.is_bitcase and self.has_name) else '->'
+
+ # special case: unserializing of structs where variable and
+ # fixed size fields are intermixed
+ if self.var_followed_by_fixed_fields and 'unserialize' == context:
+ if lenfield_prefix == '_aux':
+ lenfield_prefix = 'xcb_out'
+ sep = '.'
+
+ list_length = _c_accessor_get_expr(expr, lenfield_prefix, sep)
+
+ # 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)
+ 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, _c_accessor_get_expr(expr, lenfield_prefix, sep)))
+ 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):
+ 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))
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ length = "sizeof(%s)" % field.c_field_type
+
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ value = ' %s%s = *(%s *)xcb_tmp;' % (prefix_str, field.c_field_name, field.c_field_type)
+ if field.type.is_pad and field.type.nmemb > 1:
+ value = ''
+ for i in range(field.type.nmemb):
+ code_lines.append('%s %s%s[%d] = *(%s *)xcb_tmp;' %
+ (space, prefix_str, field.c_field_name, i, field.c_field_type))
+ length += " * %d" % field.type.nmemb
+
+ if field.type.is_list:
+ 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
+ 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, field.field_name,
+ _c_accessor_get_expr(field.type.expr, prefix)))
+ value += "&xcb_expr_%s;" % field.field_name
+
+ elif field.type.is_pad:
+ if field.type.nmemb == 1:
+ value += "&xcb_pad;"
+ else:
+ # FIXME - possible segmentation fault!!
+ value = ' memset(xcb_parts[xcb_parts_idx].iov_base, 0, %d);' % field.type.nmemb
+ length += "*%d" % field.type.nmemb
+
+ else:
+ # non-list type with fixed size
+ if field.type.nmemb == 1:
+ value += "&%s%s;" % (prefix_str, field.c_field_name)
+ # list with nmemb (fixed size) elements
+ else:
+ value += '%s%s;' % (prefix_str, field.c_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, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ value = ''
+ var_field_name = 'xcb_tmp'
+ 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))
+ if 'unpack' == context:
+ value = ' %s%s = (%s *)xcb_tmp;' % (prefix_str, field.c_field_name, field.c_field_type)
+ elif 'serialize' == context:
+ address_of = '&' if (self.is_bitcase and self.has_name) else ''
+ var_field_name = "%s%s%s" % (address_of, prefix_str, field.c_field_name)
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s;' % var_field_name
+ length = ''
+
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+ code_lines.append('%s /* %s */' % (space, field.c_field_name))
+
+ if field.type.is_list:
+ if value != '':
+ 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':
+ 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:
+ 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
+ _c_serialize_helper_insert_padding(context, code_lines, space)
+ prev_field_was_variable = False
+ fixed_prefix = prefix
+ if self.var_followed_by_fixed_fields and len(prefix)==0:
+ if 'unserialize' == context:
+ fixed_prefix = [('xcb_out', '.', self)]
+ else:
+ fixed_prefix = [('_aux', '->', self)]
+ 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:
+ _c_serialize_helper_insert_padding(context, code_lines, space)
+
+ 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() and is_bitcase:
+ 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:
+ # padding
+ if '' != length:
+ code_lines.append('%s xcb_block_len = %s;' % (space, length))
+ 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_len = xcb_block_len;' % field.c_field_name)
+ 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 = xcb_block_len;' % space)
+ code_lines.append('%s xcb_parts_idx++;' % space)
+ count += 1
+ need_padding = True
+
+ return count
+# _c_serialize_helper_fields()
+
+def _c_serialize_helper(context, complex_type,
+ code_lines, temp_vars,
+ space='', prefix=[]):
+ 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)
+ _c_serialize_helper_insert_padding(context, code_lines, space)
+
+ 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)
+
+ return count
+# _c_serialize_helper()
+
+def _c_serialize(self):
+ _h_setlevel(1)
+ _c_setlevel(1)
+
+ _hc('')
+ # _serialize() returns the buffer size
+ _hc('int')
+
+ variable_size_fields = 0
+ # maximum space required for type definition of function arguments
+ maxtypelen = 0
+ param_fields, wire_fields, params = get_serialize_params('serialize', self)
+
+ # 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
+ for idx, p in enumerate(params):
+ line = ""
+ typespec, pointerspec, field_name = p
+ indent = ' '*(len(self.c_serialize_name)+2)
+ # p==0: function declaration
+ if 0==idx:
+ line = "%s (" % self.c_serialize_name
+ indent = ''
+ spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
+ line += "%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name)
+ if idx < len(params)-1:
+ _hc("%s," % line)
+ else:
+ _h("%s);" % line)
+ _c("%s)" % line)
+
+ _c('{')
+ if not self.is_switch:
+ _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;')
+ if variable_size_fields > 0:
+ code_lines = []
+ temp_vars = []
+ count = _c_serialize_helper('serialize', self,
+ code_lines, temp_vars)
+ # update variable size fields
+ variable_size_fields = count
+ 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;')
+ for t in temp_vars:
+ _c(t)
+
+ _c('')
+
+ if variable_size_fields > 0:
+ for l in code_lines:
+ _c(l)
+ _c('')
+
+ # variable sized fields have been collected, now
+ # allocate memory and copy everything into a continuous memory area
+ _c(' if (NULL == xcb_out) {')
+ _c(' /* allocate memory */')
+ _c(' *_buffer = malloc(xcb_buffer_len);')
+ _c(' xcb_out = *_buffer;')
+ _c(' }')
+ _c('')
+
+ # fill in struct members
+ if not self.is_switch:
+ 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:
+ _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(' memcpy(xcb_tmp, xcb_parts[i].iov_base, xcb_parts[i].iov_len);')
+ _c(' xcb_tmp += xcb_parts[i].iov_len;')
+ _c(' }')
+ _c('')
+ _c(' return xcb_buffer_len;')
+ _c('}')
+# _c_serialize()
+
+def _c_unserialize(self):
+ _h_setlevel(1)
+ _c_setlevel(1)
+
+ # _unserialize()
+ _hc('')
+ # _unserialize() returns the buffer size as well
+ _hc('int')
+
+
+ variable_size_fields = 0
+ # maximum space required for type definition of function arguments
+ maxtypelen = 0
+ if self.is_switch:
+ context = 'unpack'
+ func_name = self.c_unpack_name
+ else:
+ context = 'unserialize'
+ func_name = self.c_unserialize_name
+ param_fields, wire_fields, params = get_serialize_params(context, self)
+
+ # 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
+ for idx, p in enumerate(params):
+ line = ""
+ typespec, pointerspec, field_name = p
+ indent = ' '*(len(func_name)+2)
+ # p==0: function declaration
+ if 0==idx:
+ line = "%s (" % func_name
+ indent = ''
+ spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
+ line += "%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name)
+ if idx < len(params)-1:
+ _hc("%s," % line)
+ else:
+ _h("%s);" % line)
+ _c("%s)" % line)
+
+ _c('{')
+ _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)
+ else:
+ _c(' %s xcb_out;', self.c_type)
+ _c(' unsigned int xcb_buffer_len = 0;')
+ _c(' unsigned int xcb_block_len = 0;')
+ _c(' unsigned int xcb_pad = 0;')
+
+ code_lines = []
+ temp_vars = []
+ _c_serialize_helper(context, self,
+ code_lines, temp_vars)
+ for t in temp_vars:
+ _c(t)
+ _c('')
+
+ for l in code_lines:
+ _c(l)
+ _c('')
+
+ if 'unserialize' == context:
+ # allocate memory automatically
+ _c(' if (NULL == *_aux) {')
+ _c(' /* allocate memory */')
+ _c(' *_aux = malloc(xcb_buffer_len);')
+ _c(' }')
+ _c('')
+ _c(' **_aux = xcb_out;')
+ _c(' xcb_tmp = (char *)++(*_aux);')
+ 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_unserialize()
+
+def _c_sizeof_helper(self):
+ _h_setlevel(1)
+ _c_setlevel(1)
+
+ # _unserialize()
+ _hc('')
+ # _unserialize() returns the buffer size as well
+ _hc('int')
+
+ variable_size_fields = 0
+ # maximum space required for type definition of function arguments
+ maxtypelen = 0
+ param_fields, wire_fields, params = get_serialize_params('sizeof', self)
+
+ # 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
+ for idx, p in enumerate(params):
+ line = ""
+ typespec, pointerspec, field_name = p
+ indent = ' '*(len(self.c_sizeof_name)+2)
+ # p==0: function declaration
+ if 0==idx:
+ line = "%s (" % self.c_sizeof_name
+ indent = ''
+ spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
+ line += "%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name)
+ if idx < len(params)-1:
+ _hc("%s," % line)
+ else:
+ _h("%s);" % line)
+ _c("%s)" % line)
+
+ _c('{')
+
+ 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))
+ 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))
+ # otherwise: evaluate parameters directly
+ else:
+ code_lines = []
+ temp_vars = []
+ _c_serialize_helper('sizeof', self,
+ code_lines, temp_vars)
+ _c(' char *xcb_tmp = (char *)_buffer;')
+ 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;')
+ for t in temp_vars:
+ _c(t)
+ _c('')
+
+ for l in code_lines:
+ _c(l)
+ _c('')
+ _c(' return xcb_buffer_len;')
+ _c('}')
+# _c_sizeof_helper()
def _c_iterator_get_end(field, 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.c_type in _cardinal_types:
+ 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 + '))'
if not self.fixed_size():
_c(' %s *R = i->data;', self.c_type)
- _c(' xcb_generic_iterator_t child = %s;', _c_iterator_get_end(self.last_varsized_field, 'R'))
- _c(' --i->rem;')
- _c(' i->data = (%s *) child.data;', self.c_type)
- _c(' i->index = child.index;')
+ 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:
+ _c(' xcb_generic_iterator_t child = %s;', _c_iterator_get_end(self.last_varsized_field, 'R'))
+ _c(' --i->rem;')
+ _c(' i->data = (%s *) child.data;', self.c_type)
+ _c(' i->index = child.index;')
else:
_c(' --i->rem;')
_c(' ++i->data;')
_c(' return ret;')
_c('}')
-def _c_accessor_get_length(expr, prefix=''):
+def _c_accessor_get_length(expr, prefix='', sep='->'):
'''
Figures out what C code is needed to get a length field.
For fields that follow a variable-length field, use the accessor.
Otherwise, just reference the structure field directly.
'''
- prefarrow = '' if prefix == '' else prefix + '->'
-
+ prefarrow = '' if prefix == '' else prefix + sep
+
if expr.lenfield != None and expr.lenfield.prev_varsized_field != None:
- return expr.lenfield.c_accessor_name + '(' + prefix + ')'
+ # 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!
+ retval = expr.lenfield.c_accessor_name + '(' + prefix + ')'
+ if prefix in ('', '_aux', 'xcb_out'):
+ prefix_str = '' if prefix=='' else '%s' % (prefarrow)
+ retval = '%s%s' % (prefix_str, expr.lenfield_name)
+ return retval
elif expr.lenfield_name != None:
- return prefarrow + expr.lenfield_name
+ if prefix.endswith(sep):
+ return prefix + expr.lenfield_name
+ else:
+ return prefarrow + expr.lenfield_name
else:
return str(expr.nmemb)
-def _c_accessor_get_expr(expr, prefix=''):
+def _c_accessor_get_expr(expr, prefix='', sep='->'):
'''
Figures out what C code is needed to get the length of a list 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, prefix)
-
- if expr.op != None:
- return '(' + _c_accessor_get_expr(expr.lhs, prefix) + ' ' + expr.op + ' ' + _c_accessor_get_expr(expr.rhs, prefix) + ')'
+ lenexp = _c_accessor_get_length(expr, prefix, sep)
+
+ if expr.op == '~':
+ return '(' + '~' + _c_accessor_get_expr(expr.rhs, prefix, sep) + ')'
+ elif expr.op == 'popcount':
+ return 'xcb_popcount(' + _c_accessor_get_expr(expr.rhs, prefix, sep) + ')'
+ 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':
+ # 1. 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)
+ if prefix != '' and not prefix.endswith(sep):
+ prefix += sep
+ list_name = "%s%s" % (prefix, field.c_field_name)
+ c_length_func = "%s(%s%s)" % (field.c_length_name, prefix, field.c_field_name)
+ # FIXME - works only for integers this way!!
+ c_length_func = _c_accessor_get_expr(field.type.expr, prefix='', sep='')
+ return 'xcb_sumof(%s, %s)' % (list_name, c_length_func)
+ elif expr.op != None:
+ return '(' + _c_accessor_get_expr(expr.lhs, prefix, sep) + ' ' + expr.op + ' ' + _c_accessor_get_expr(expr.rhs, prefix, sep) + ')'
elif expr.bitfield:
return 'xcb_popcount(' + lenexp + ')'
else:
'''
Declares the accessor functions for a non-list field that follows a variable-length field.
'''
- if field.field_type[0] in _cardinal_types:
+ if field.type.is_simple:
_hc('')
_hc('')
_hc('/*****************************************************************************')
_h('%s (const %s *R /**< */);', field.c_accessor_name, self.c_type)
_c('%s (const %s *R /**< */)', field.c_accessor_name, self.c_type)
_c('{')
- _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)
+ 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 *', field.c_field_type)
+ if field.type.is_switch:
+ return_type = 'void *'
+ else:
+ return_type = '%s *' % field.c_field_type
+
+ _hc(return_type)
_h('%s (const %s *R /**< */);', field.c_accessor_name, self.c_type)
_c('%s (const %s *R /**< */)', field.c_accessor_name, self.c_type)
_c('{')
- _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)
+ 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):
_c('%s (const %s *R /**< */)', field.c_accessor_name, self.c_type)
_c('{')
- if field.prev_varsized_field == None:
+ 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;', _c_accessor_get_expr(field.type.expr, 'R'))
_c('}')
- if field.field_type[0] in _cardinal_types:
+ if field.type.member.is_simple:
_hc('')
_hc('')
_hc('/*****************************************************************************')
'''
Declares the accessor functions for the fields of a structure.
'''
- 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 != None:
- _c_accessors_field(self, field)
+ # no accessors for switch -
+ # switch always needs to be unpacked explicitly
+ if not self.is_switch:
+ 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):
'''
struct_fields = []
maxtypelen = 0
+ varfield = None
for field in self.fields:
- if not field.type.fixed_size():
- break
+ if not field.type.fixed_size() and not self.is_switch and not self.is_union:
+ varfield = field.c_field_name
+ continue
+# if varfield != None and not field.type.is_pad and field.wire:
+# errmsg = '%s: warning: variable field %s followed by fixed field %s\n' % (self.c_type, varfield, field.c_field_name)
+# sys.stderr.write(errmsg)
+# sys.exit(1)
if field.wire:
struct_fields.append(field)
-
+
for field in struct_fields:
- if len(field.c_field_type) > maxtypelen:
- maxtypelen = len(field.c_field_type)
+ 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)
- for field in struct_fields:
- spacing = ' ' * (maxtypelen - len(field.c_field_type))
- _h(' %s%s %s%s; /**< */', 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)
_c_complex(self)
_c_iterator(self, name)
-def _c_request_helper(self, name, cookie_type, void, regular):
+def _c_request_helper(self, name, cookie_type, void, regular, aux=False):
'''
Declares a request function.
'''
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
+ func_name = self.c_request_name if not aux else self.c_aux_name
if checked:
- func_name = self.c_checked_name
+ func_name = self.c_checked_name if not aux else self.c_aux_checked_name
if unchecked:
- func_name = self.c_unchecked_name
+ 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:
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:
- if len(field.c_field_const_type) > maxtypelen:
- maxtypelen = len(field.c_field_const_type)
+ 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)
_hc(' ** @param xcb_connection_t%s *c', spacing)
for field in param_fields:
- spacing = ' ' * (maxtypelen - len(field.c_field_const_type))
- _hc(' ** @param %s%s %s%s', field.c_field_const_type, spacing, field.c_pointer, field.c_field_name)
+ 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(' **')
count = len(param_fields)
for field in param_fields:
count = count - 1
- spacing = ' ' * (maxtypelen - len(field.c_field_const_type))
+ 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, field.c_field_const_type, spacing, field.c_pointer, field.c_field_name, comma)
+ _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, field.c_field_const_type, spacing, field.c_pointer, field.c_field_name, comma)
+ _c('%s%s%s %s%s /**< */%s', func_spacing, c_field_const_type,
+ spacing, c_pointer, field.c_field_name, comma)
count = 2
- for field in param_fields:
- if not field.type.fixed_size():
- count = 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
+ if self.var_followed_by_fixed_fields:
+ # there will be only one call to _serialize() and no need for additional padding
+ dimension -= 1
_c('{')
_c(' static const xcb_protocol_request_t xcb_req = {')
_c(' /* isvoid */ %d', 1 if void else 0)
_c(' };')
_c(' ')
- _c(' struct iovec xcb_parts[%d];', count + 2)
+
+ _c(' struct iovec xcb_parts[%d];', dimension)
_c(' %s xcb_ret;', func_cookie)
_c(' %s xcb_out;', self.c_type)
- _c(' ')
+ if self.var_followed_by_fixed_fields:
+ _c(' /* in the protocol description, variable size fields are followed by fixed size fields */')
+
+ 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(' ')
+# _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))
-
elif field.type.is_pad:
if field.type.nmemb == 1:
_c(' xcb_out.%s = 0;', field.c_field_name)
else:
_c(' memcpy(xcb_out.%s, %s, %d);', field.c_field_name, field.c_field_name, field.type.nmemb)
- _c(' ')
- _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(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
- if field.type.is_list:
- _c(' xcb_parts[%d].iov_len = %s * sizeof(%s);', count, _c_accessor_get_expr(field.type.expr), field.type.member.c_wiretype)
- else:
- _c(' xcb_parts[%d].iov_len = %s * sizeof(%s);', count, 'Uh oh', field.type.c_wiretype)
- _c(' xcb_parts[%d].iov_base = 0;', count + 1)
- _c(' xcb_parts[%d].iov_len = -xcb_parts[%d].iov_len & 3;', count + 1, count)
- count = count + 2
+ 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 = []
+
+ if not self.var_followed_by_fixed_fields:
+ _c(' ')
+ _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), field.type.member.c_wiretype)
+ else:
+ expr = field.type.expr
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix([('xcb_out', '.', self)],
+ 'xcb_out', '.')
+ param_fields, wire_fields, params = get_serialize_params('sizeof', self)
+ param_names = [p[2] for p in params]
+ sep = '.'
+
+ # look if the list's lenfield is a struct member or a function argument
+ # special case: if the list has a length field, its name will be returned
+ # unchanged by calling c_accessor_get_length(expr)
+ if expr.lenfield_name == _c_accessor_get_length(expr):
+ if expr.lenfield_name in param_names:
+ # the length field appears as separate argument,
+ # so no need for a prefix
+ lenfield_prefix = ''
+
+ list_length = _c_accessor_get_expr(expr, lenfield_prefix, sep)
+
+ 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:
+ # call _serialize()
+ buffer_var = 'xcb_parts[%d].iov_base' % count
+ serialize_args = get_serialize_args(self, '&%s' % buffer_var, '&xcb_out', 'serialize')
+ _c(' %s = (char *) 0;', buffer_var)
+ _c(' xcb_parts[%d].iov_len = %s (%s);', count, self.c_serialize_name, serialize_args)
+ free_calls.append(' free(xcb_parts[%d].iov_base);' % count)
+ # 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('}')
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('%sxcb_generic_error_t%s **e /**< */);', spacing3, spacing2)
_c('%sxcb_generic_error_t%s **e /**< */)', spacing3, spacing2)
_c('{')
- _c(' return (%s *) xcb_wait_for_reply(c, cookie.sequence, e);', self.c_reply_type)
+
+ 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):
# 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)
# 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):
'''
'union' : c_union,
'request' : c_request,
'event' : c_event,
- 'error' : c_error
+ '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
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 to extend the 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(argv[1], output)
+module = Module(args[0], output)
# Build type-registry and resolve type dependencies
module.register()
projects / profile / ivi / libxcb.git / blobdiff