added generating code for _serialize() in case of variable sized structs (largely untested)
This commit is contained in:
parent
d003145609
commit
4e665e1580
267
src/c_client.py
267
src/c_client.py
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@ -23,6 +23,10 @@ _clines = []
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_clevel = 0
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_ns = None
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# global variable to keep track of serializers
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# due to weird dependencies, I see no way to do this more elegant at the moment
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finished_serializers = []
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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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@ -158,6 +162,7 @@ def c_open(self):
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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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@ -302,6 +307,9 @@ def _c_type_setup(self, name, postfix):
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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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# FIXME - structures with variable sized members, sort out when serialize() is needed
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if (field.type.nmemb is None): # and not field.type.member.fixed_size():
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self.need_serialize = 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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@ -331,23 +339,23 @@ def _c_type_setup(self, name, postfix):
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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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# FIXME - structures with variable sized members, sort out when serialize() is needed
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prev_varsized_offset = 0
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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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print "switch", self.name
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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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# declare switch (un)packing functions
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_c_accessors(self, name, name)
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if self.need_serialize:
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if not hasattr(self, 'in_reply'):
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if self.need_serialize and not self.is_bitcase:
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if self.c_serialize_name not in finished_serializers:
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# if not hasattr(self, 'in_reply'):
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_c_serialize(self)
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_c_unserialize(self)
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_c_unserialize(self)
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finished_serializers.append(self.c_serialize_name)
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# _c_type_setup()
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def get_request_fields(self):
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@ -363,16 +371,19 @@ def get_request_fields(self):
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# need to set the field up in the xcb_out structure
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wire_fields.append(field)
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# fields like 'pad0' are skipped!
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return (param_fields, wire_fields)
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# get_request_fields()
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def unserialize_fields(complex_type, code_lines=[], space='', prefix='', bitcase=False):
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prefix_str = prefix
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need_padding = False
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prefix_str = prefix
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lenfield_prefix = "_aux"
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if prefix != '':
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prefix_str += "->"
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lenfield_prefix += "->%s" % prefix
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if hasattr(complex_type, 'type'):
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self = complex_type.type
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complex_name = complex_type.name
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@ -380,6 +391,9 @@ def unserialize_fields(complex_type, code_lines=[], space='', prefix='', bitcase
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self = complex_type
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complex_name = '_aux'
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param_fields, wire_fields, params = get_serialize_params(self, unserialize=True)
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param_names = [p[2] for p in params]
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if self.is_switch:
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switch_expr = _c_accessor_get_expr(self.expr)
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need_padding = True
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@ -389,41 +403,62 @@ def unserialize_fields(complex_type, code_lines=[], space='', prefix='', bitcase
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unserialize_fields(b.type, code_lines, space="%s " % space,
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prefix="%s%s" % (prefix_str, complex_name), bitcase=True)
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code_lines.append(' }')
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# padding
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code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
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#code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
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code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
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else:
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# if not inside switch, simply cast the buffer to the respective xcb_out type
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if not bitcase:
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code_lines.append('%s /* %s */' % (space, self.c_type))
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code_lines.append('%s xcb_buffer_len = sizeof(%s);' % (space, self.c_type))
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code_lines.append('%s /* padding */' % space)
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code_lines.append('%s xcb_buffer_len += -xcb_buffer_len & 3;' % space)
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code_lines.append('%s xcb_tmp += xcb_buffer_len;' % space)
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for field in self.fields:
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if not ((field.wire and not field.auto) or field.visible):
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continue
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length = "sizeof(%s)" % field.c_field_type
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# 1. fields with fixed size
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# 1. fields with fixed size need only be filled explicitly inside switch
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if field.type.fixed_size():
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need_padding = True
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value = ' _aux->%s = (%s) *xcb_tmp;' % (field.c_field_name, field.type.c_type)
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# FIXME - lists
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if bitcase:
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need_padding = True
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value = ' _aux->%s = (%s) *xcb_tmp;' % (field.c_field_name, field.type.c_type)
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# FIXME - lists
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else:
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continue
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# 2. fields with variable size
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else:
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#if need_padding:
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# unserialize: always calculate padding before variable sized fields
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code_lines.append('%s if (0 != xcb_block_len) {' % space)
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code_lines.append('%s xcb_block_len += -xcb_block_len & 3;' % space)
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code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
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code_lines.append('%s xcb_buffer_len += xcb_block_len;' % space)
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code_lines.append('%s xcb_block_len = 0;' % space)
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code_lines.append('%s }' % space)
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elif not field.type.fixed_size():
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# unserialize: always calculate padding before variable sized fields in bitcase
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# FIXME
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print("unserialize not yet implemented for variable size fields like %s" % field.c_field_name)
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if need_padding or bitcase:
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code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
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code_lines.append('%s if (0 != xcb_pad) {' % space)
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code_lines.append('%s xcb_tmp += xcb_pad;' % space)
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code_lines.append('%s xcb_buffer_len += xcb_pad;' % space)
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code_lines.append('%s xcb_block_len = 0;' % space)
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code_lines.append('%s xcb_pad = 0;' % space)
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code_lines.append('%s }' % space)
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value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s%s;' % (prefix_str, field.c_field_name)
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# value = ' *%s = (%s *) xcb_tmp;' % (field.c_field_name, field.type.c_type)
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value = ''
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if field.type.is_list:
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# FIXME - list with variable-sized elements
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if field.type.size is None:
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errmsg = '%s: warning: list object with variable-sized members not supported for field %s\n'
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sys.stderr.write(errmsg % (self.c_type, field.c_field_name))
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length = '%s * sizeof(%s)' % (_c_accessor_get_expr(field.type.expr, prefix), field.type.member.c_wiretype)
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expr = field.type.expr
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# look if the list's lenfield is a struct member or a function argument
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lf_prefix = lenfield_prefix
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if expr.lenfield_name == _c_accessor_get_length(expr):
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if expr.lenfield_name in param_names:
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lf_prefix = ''
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length = '%s * sizeof(%s)' % (_c_accessor_get_expr(field.type.expr, lf_prefix), field.type.member.c_wiretype)
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elif field.type.is_switch:
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# switch is handled by this function as a special case
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unserialize_fields(field.type, code_lines, space, prefix="%s%s" % (prefix_str, field.c_field_name))
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@ -431,7 +466,7 @@ def unserialize_fields(complex_type, code_lines=[], space='', prefix='', bitcase
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# FIXME - variable sized field that is not a list
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errmsg = '%s: warning: non-list object of variable size not supported for field %s\n'
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sys.stderr.write(errmsg % (self.c_type, field.c_field_name))
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length = '%s * sizeof(%s)' % ('Uh oh', field.type.c_wiretype)
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length = '%s * sizeof(%s)' % ('undefined', field.type.c_wiretype)
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# save serialization C code
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if value is not None:
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@ -442,23 +477,21 @@ def unserialize_fields(complex_type, code_lines=[], space='', prefix='', bitcase
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code_lines.append('%s /* %s */' % (space, field.c_field_name))
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# _aux->XXX =
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code_lines.append('%s%s' % (space, value))
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if value != '':
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code_lines.append('%s%s' % (space, value))
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if field.type.fixed_size():
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code_lines.append('%s xcb_block_len += %s;' % (space, length))
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code_lines.append('%s xcb_tmp += %s;' % (space, length))
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else:
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# take account of padding
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code_lines.append('%s xcb_block_len = %s;' % (space, length))
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code_lines.append('%s xcb_block_len += -xcb_block_len & 3;' % space)
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code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
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code_lines.append('%s xcb_buffer_len += xcb_block_len;' % space)
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code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
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code_lines.append('%s xcb_tmp += xcb_block_len + xcb_pad;' % space)
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code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
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code_lines.append('%s xcb_block_len = 0;' % space)
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if not bitcase:
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code_lines.append('%s xcb_block_len += -xcb_block_len & 3;' % space)
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#code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
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code_lines.append('%s xcb_buffer_len += xcb_block_len;' % space)
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code_lines.append('%s xcb_pad = 0;' % space)
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need_padding = False
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# unserialize_fields()
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@ -480,8 +513,11 @@ def serialize_fields(complex_type, code_lines=[], temp_vars=set(),
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# flag to mark wether explicit padding needs to be inserted
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need_padding = False
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prefix_str = prefix
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lenfield_prefix = "_aux"
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if prefix != '':
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prefix_str += "->"
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lenfield_prefix += "->%s" % prefix
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if hasattr(complex_type, 'type'):
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self = complex_type.type
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@ -490,31 +526,18 @@ def serialize_fields(complex_type, code_lines=[], temp_vars=set(),
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self = complex_type
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complex_name = '_aux'
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def end_block(count):
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"end a block => insert padding"
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if need_padding and not bitcase:
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code_lines.append(' /* padding */')
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code_lines.append(' xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;')
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code_lines.append(' xcb_pad = -xcb_block_len & 3;')
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code_lines.append(' xcb_parts[xcb_parts_idx].iov_len = xcb_pad;')
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code_lines.append(' xcb_parts_idx++;')
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code_lines.append('')
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code_lines.append(' xcb_buffer_len += xcb_pad + %s;' % 'xcb_block_len')
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code_lines.append('')
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count += 1
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return count
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# end_block()
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def insert_padding(count):
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code_lines.append('%s /* implicit padding */' % space)
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code_lines.append('%s /* padding */' % space)
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code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
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code_lines.append('%s if (0 != xcb_pad) {' % space)
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code_lines.append('%s xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;' % space)
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code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = xcb_pad;' % space)
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code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
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code_lines.append('%s xcb_pad = 0;' % space)
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code_lines.append('%s xcb_parts_idx++;' % space)
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code_lines.append('%s }' % space)
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code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
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code_lines.append('%s xcb_pad = 0;' % space)
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code_lines.append('%s xcb_block_len = 0;' % space)
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need_padding = True
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return count + 1
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# insert_padding()
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@ -531,6 +554,7 @@ def serialize_fields(complex_type, code_lines=[], temp_vars=set(),
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prefix="%s%s" % (prefix_str, complex_name),
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serialize_fixed_size_fields=True, bitcase=True)
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code_lines.append(' }')
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count = insert_padding(count)
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else:
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for field in self.fields:
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@ -545,7 +569,7 @@ def serialize_fields(complex_type, code_lines=[], temp_vars=set(),
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# 1. fields with fixed size
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# fixed size fields are not always handled here,
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# dependent on serialize_fixed_size_fields
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if field.type.fixed_size() and serialize_fixed_size_fields:
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if field.type.fixed_size() and bitcase:
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value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) '
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need_padding = True
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@ -560,8 +584,6 @@ def serialize_fields(complex_type, code_lines=[], temp_vars=set(),
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elif field.type.is_pad:
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if field.type.nmemb == 1:
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temp_vars.add(' unsigned int xcb_pad = 0;')
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temp_vars.add(' char xcb_pad0[3] = {0, 0, 0};')
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value += "&xcb_pad;"
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else:
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value = ' memset(xcb_parts[xcb_parts_idx].iov_base, 0, %d);' % field.type.nmemb
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@ -579,65 +601,70 @@ def serialize_fields(complex_type, code_lines=[], temp_vars=set(),
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# 2. fields with variable size
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elif not field.type.fixed_size():
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# always calculate padding before variable sized fields
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count = insert_padding(count)
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code_lines.append('%s xcb_block_len = 0;' % space)
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if bitcase or need_padding:
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count = insert_padding(count)
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code_lines.append('%s xcb_block_len = 0;' % space)
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need_padding = False
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code_lines.append('%s /* %s */' % (space, field.c_field_name))
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value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s%s;' % (prefix_str, field.c_field_name)
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code_lines.append('%s%s' % (space, value))
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if field.type.is_list:
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# FIXME - list of variable length with variable size elements
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# list of variable length with variable size elements
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if field.type.size is None:
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errmsg = '%s: warning: list object with variable-sized members not supported for field %s\n'
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sys.stderr.write(errmsg % (self.c_type, field.c_field_name))
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length = 'undefined'
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code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = 0;' % space)
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code_lines.append('%s xcb_tmp = (char *) %s%s;' % (space, prefix_str, field.c_field_name))
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code_lines.append('%s for(i=0; i<%s; i++) {'
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% (space, _c_accessor_get_expr(field.type.expr, lenfield_prefix)))
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code_lines.append('%s xcb_block_len = %s(xcb_tmp);' % (space, field.type.c_unserialize_name))
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code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len += xcb_block_len;' % space)
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code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
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code_lines.append('%s }' % space)
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code_lines.append('%s xcb_block_len = xcb_parts[xcb_parts_idx].iov_len;' % space)
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# list of variable length with fixed size elements
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else:
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length = '%s * sizeof(%s)' % (_c_accessor_get_expr(field.type.expr, prefix),
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length = '%s * sizeof(%s)' % (_c_accessor_get_expr(field.type.expr, lenfield_prefix),
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field.type.member.c_wiretype)
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elif field.type.is_switch:
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# switch is handled at the beginning of this function as a special case
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count += serialize_fields(field.type, code_lines, temp_vars, space,
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prefix="%s%s" % (prefix_str, field.c_field_name))
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# count += serialize_fields(field.type, code_lines, temp_vars, space,
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# prefix="%s%s" % (prefix_str, field.c_field_name))
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# FIXME - call another serialize
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sys.stderr.write("FIXME: call %s" % field.type.c_serialize_name)
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else:
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# FIXME - variable sized field that is not a list
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errmsg = '%s: warning: non-list object of variable size not supported for field %s\n'
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sys.stderr.write(errmsg % (self.c_type, field.c_field_name))
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length = '%s * sizeof(%s)' % ('Uh oh', field.type.c_wiretype)
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length = '%s * sizeof(%s)' % ('undefined', field.type.c_wiretype)
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# 3. save serialization C code
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if value is not None:
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# set xcb_parts[].iov_base and xcb_parts[].iov_len
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# insert a comment so one can easily trace back to the XML
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if field.type.fixed_size():
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# field belongs to some anchestor structure
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code_lines.append('%s /* %s.%s */' % (space, self.c_type, field.c_field_name))
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else:
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code_lines.append('%s /* %s */' % (space, field.c_field_name))
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code_lines.append('%s%s' % (space, value))
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if bitcase:
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code_lines.append('%s xcb_block_len += %s;' % (space, length))
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code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = xcb_block_len;' % space)
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# set xcb_parts[].iov_base and xcb_parts[].iov_len
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code_lines.append('%s%s' % (space, value))
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code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = %s;' % (space, length))
|
||||
# increase xcb_parts index
|
||||
code_lines.append('%s xcb_parts_idx++;' % space)
|
||||
count += 1
|
||||
|
||||
# record required memory
|
||||
if field.type.fixed_size():
|
||||
code_lines.append('%s xcb_block_len += %s;' % (space, length))
|
||||
else:
|
||||
if not field.type.fixed_size():
|
||||
# FIXME
|
||||
count = insert_padding(count)
|
||||
need_padding = False
|
||||
# raise Exception("obsolete - should not be reached")
|
||||
# code_lines.append('%s xcb_unpadded = xcb_parts[xcb_parts_idx].iov_len;' % space)
|
||||
|
||||
count = end_block(count)
|
||||
if count > 0:
|
||||
temp_vars.add(' unsigned int xcb_parts_idx = 0;')
|
||||
temp_vars.add(' unsigned int xcb_block_len = 0;')
|
||||
if need_padding:
|
||||
temp_vars.add(' unsigned int xcb_pad = 0;')
|
||||
temp_vars.add(' char xcb_pad0[3] = {0, 0, 0};')
|
||||
return count
|
||||
# serialize_fields()
|
||||
|
||||
|
@ -689,7 +716,18 @@ def get_serialize_params(self, buffer_var='_buffer', aux_var='_aux', unserialize
|
|||
param_fields += [s[0] for s in switch_params]
|
||||
|
||||
# _serialize function parameters
|
||||
params = [('void', '**', buffer_var)]
|
||||
if not unserialize:
|
||||
params = [('void', '**', buffer_var)]
|
||||
else:
|
||||
params = [('const void', '*', buffer_var)]
|
||||
|
||||
# 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 = ''
|
||||
params.append((typespec, pointerspec, p.c_field_name))
|
||||
|
||||
# parameter fields if any
|
||||
if self.is_switch:
|
||||
for p in switch_params:
|
||||
|
@ -699,9 +737,9 @@ def get_serialize_params(self, buffer_var='_buffer', aux_var='_aux', unserialize
|
|||
# aux argument - structure to be serialized
|
||||
if not unserialize:
|
||||
params.append(('const %s' % self.c_type, '*', aux_var))
|
||||
else:
|
||||
elif self.is_switch:
|
||||
params.append(('%s' % self.c_type, '*', aux_var))
|
||||
if not self.is_switch:
|
||||
if not self.is_switch and not unserialize:
|
||||
for p in param_fields:
|
||||
if not p.type.fixed_size():
|
||||
params.append((p.c_field_const_type, p.c_pointer, p.c_field_name))
|
||||
|
@ -750,7 +788,8 @@ def _c_serialize(self):
|
|||
_c('{')
|
||||
if not self.is_switch:
|
||||
_c(' %s *xcb_out = *_buffer;', self.c_type)
|
||||
_c(' unsigned int xcb_buffer_len = sizeof(%s);', 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;')
|
||||
|
@ -761,15 +800,15 @@ def _c_serialize(self):
|
|||
serialize_fixed_size_fields=False)
|
||||
# update variable size fields
|
||||
variable_size_fields = count
|
||||
_c(' struct iovec xcb_parts[%d];', count)
|
||||
_c(' unsigned int xcb_pad = 0;')
|
||||
_c(' char xcb_pad0[3] = {0, 0, 0};')
|
||||
_c(' struct iovec xcb_parts[%d];', count+1)
|
||||
_c(' unsigned int xcb_parts_idx = 0;')
|
||||
_c(' unsigned int xcb_block_len = 0;')
|
||||
for t in temp_vars:
|
||||
_c(t)
|
||||
_c(' char *xcb_tmp;')
|
||||
_c(' unsigned int i;')
|
||||
if not self.is_switch:
|
||||
_c(' unsigned int xcb_out_pad = -xcb_buffer_len & 3;')
|
||||
_c(' /* add size of padding */')
|
||||
_c(' xcb_buffer_len += xcb_out_pad;')
|
||||
|
||||
_c('')
|
||||
|
||||
|
@ -777,6 +816,16 @@ def _c_serialize(self):
|
|||
for l in code_lines:
|
||||
_c(l)
|
||||
|
||||
# _c(' /* padding */')
|
||||
# _c(' xcb_pad = -xcb_block_len & 3;')
|
||||
# _c(' if (0 != xcb_pad) {')
|
||||
# _c(' xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;')
|
||||
# _c(' xcb_parts[xcb_parts_idx].iov_len = xcb_pad;')
|
||||
# _c(' xcb_parts_idx++;')
|
||||
# _c(' }')
|
||||
# _c(' xcb_buffer_len += xcb_block_len + xcb_pad;')
|
||||
_c('')
|
||||
|
||||
# variable sized fields have been collected, now
|
||||
# allocate memory and copy everything into a continuous memory area
|
||||
_c(' if (NULL == xcb_out) {')
|
||||
|
@ -845,7 +894,6 @@ def _c_unserialize(self):
|
|||
if 0==p:
|
||||
line = "%s (" % self.c_unserialize_name
|
||||
indent = ''
|
||||
pointerspec = '*'
|
||||
spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
|
||||
line += "%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name)
|
||||
if p < len(params)-1:
|
||||
|
@ -855,10 +903,14 @@ def _c_unserialize(self):
|
|||
_c("%s)" % line)
|
||||
|
||||
_c('{')
|
||||
_c(' char *xcb_tmp = _buffer;')
|
||||
_c(' char *xcb_tmp = (char *)_buffer;')
|
||||
if not self.is_switch:
|
||||
_c(' const %s *_aux = (%s *)_buffer;', 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('')
|
||||
|
||||
code_lines = []
|
||||
unserialize_fields(self, code_lines)
|
||||
for l in code_lines:
|
||||
|
@ -1424,7 +1476,8 @@ def _c_request_helper(self, name, cookie_type, void, regular, aux=False):
|
|||
_c(' %s xcb_ret;', func_cookie)
|
||||
_c(' %s xcb_out;', self.c_type)
|
||||
for idx, f in enumerate(serial_fields):
|
||||
_c(' %s xcb_aux%d;', f.type.c_type, idx)
|
||||
if not aux:
|
||||
_c(' %s xcb_aux%d;' % (f.type.c_type, idx))
|
||||
_c(' ')
|
||||
_c(' printf("in function %s\\n");' % func_name)
|
||||
|
||||
|
@ -1455,13 +1508,23 @@ def _c_request_helper(self, name, cookie_type, void, regular, aux=False):
|
|||
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.need_serialize:
|
||||
if not field.type.need_serialize:
|
||||
_c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
|
||||
else:
|
||||
if not aux:
|
||||
_c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
|
||||
else:
|
||||
_c(' xcb_parts[%d].iov_base = (char *) 0;', count)
|
||||
idx = serial_fields.index(field)
|
||||
serialize_args = get_serialize_params(field.type,
|
||||
field.c_field_name,
|
||||
'&xcb_aux%d' % idx,
|
||||
)[2]
|
||||
if not aux:
|
||||
serialize_args = get_serialize_params(field.type,
|
||||
field.c_field_name,
|
||||
'&xcb_aux%d' % idx)[2]
|
||||
else:
|
||||
serialize_args = get_serialize_params(field.type,
|
||||
'&xcb_parts[%d].iov_base' % count,
|
||||
field.c_field_name)[2]
|
||||
|
||||
serialize_args = reduce(lambda x,y: "%s, %s" % (x,y), [a[2] for a in serialize_args])
|
||||
_c(' xcb_parts[%d].iov_len = ', count)
|
||||
if aux:
|
||||
|
|
Loading…
Reference in New Issue