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printers.py
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Fri, Nov 8, 19:42

printers.py
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#!/usr/bin/env python
# encoding: utf-8
#
# Inspired from boost's pretty printers from
# Rüdiger Sonderfeld <ruediger@c-plusplus.de>
# and from Pretty-printers for libstc++ from Free Software Foundation, Inc.
#
import gdb
import re
# import libstdcxx.v6.printers as std
__use_gdb_pp__ = True
try:
import gdb.printing
except ImportError:
__use_gdb_pp__ = False
class AkantuPrinter(object):
regex = None
@classmethod
def supports(cls, typename):
return cls.regex.search(typename)
@classmethod
def get_basic_type(cls, value):
""" Determines the type associated to a value"""
_type = value.type
# If it points to a reference, get the reference.
if _type.code == gdb.TYPE_CODE_REF:
_type = _type.target()
# Get the unqualified type, stripped of typedefs.
_type = _type.unqualified().strip_typedefs()
return _type.tag
if __use_gdb_pp__:
__akantu_pretty_printers__ = \
gdb.printing.RegexpCollectionPrettyPrinter("libakantu-v2")
else:
class AkantuPrettyPrinters(object):
def __init__(self, name):
super(AkantuPrettyPrinters, self).__init__()
self.name = name
self.printers = {}
def add_printer(self, name, regex, printer):
self.printers[name] = printer
def __call__(self, val):
typename = AkantuPrinter.get_basic_type(val)
if not typename:
return None
for name, printer in self.printers.iteritems():
if(printer.supports(typename)):
return printer
return None
__akantu_pretty_printers__ = AkantuPrettyPrinters("libakantu-v2")
def register_pretty_printer(pretty_printer):
"Registers a Pretty Printer"
__akantu_pretty_printers__.add_printer(pretty_printer.name,
pretty_printer.regex,
pretty_printer)
return pretty_printer
# @register_pretty_printer
class AkaTensorPrinter(AkantuPrinter):
"""Pretty printer for akantu::Tensor<T>"""
regex = re.compile('^akantu::Tensor<(.*), +(.*), +(.*)>$')
name = 'akantu::Tensor'
value = None
typename = ""
ptr = None
dims = []
ndims = 0
def pretty_print(self):
def ij2str(i, j, m):
return "{0}".format((self.ptr+m*j + i).dereference())
def line(i, m, n):
return "[{0}]".format(", ".join((ij2str(i, j, m) for j in
range(n))))
m = int(self.dims[0])
if (self.ndims == 1):
n = 1
else:
n = int(self.dims[1])
return "[{0}]".format(", ".join(line(i, m, n) for i in range(m)))
def __init__(self, value):
self.typename = self.get_basic_type(value)
self.value = value
self.ptr = self.value['values']
self.dims = self.value['n']
def children(self):
yield ('values', self.pretty_print())
yield ('wrapped', self.value['wrapped'])
@register_pretty_printer
class AkaVectorPrinter(AkaTensorPrinter):
"""Pretty printer for akantu::Vector<T>"""
regex = re.compile('^akantu::Vector<(.*)>$')
name = 'akantu::Vector'
n = 0
ptr = 0x0
def __init__(self, value):
super(AkaVectorPrinter, self).__init__(value)
self.ndims = 1
def to_string(self):
m = self.regex.search(self.typename)
return 'Vector<{0}>({1}) [{2}]'.format(m.group(1), int(self.dims[0]),
str(self.ptr))
@register_pretty_printer
class AkaMatrixPrinter(AkaTensorPrinter):
"""Pretty printer for akantu::Matrix<T>"""
regex = re.compile('^akantu::Matrix<(.*)>$')
name = 'akantu::Matrix'
def __init__(self, value):
super(AkaMatrixPrinter, self).__init__(value)
self.ndims = 2
def to_string(self):
m = self.regex.search(self.typename)
return 'Matrix<%s>(%d, %d) [%s]' % (m.group(1), int(self.dims[0]),
int(self.dims[1]),
str(self.ptr))
@register_pretty_printer
class AkaElementPrinter(AkantuPrinter):
"""Pretty printer for akantu::Element"""
regex = re.compile('^akantu::Element$')
name = 'akantu::Element'
def __init__(self, value):
self.typename = self.get_basic_type(value)
self.value = value
self.element = self.value['element']
self.eltype = self.value['type']
self.ghost_type = self.value['ghost_type']
def to_string(self):
return 'Element({0}, {1}, {2})'.format(self.element, self.eltype,
self.ghost_type)
def register_akantu_printers(obj):
"Register Akantu Pretty Printers."
if __use_gdb_pp__:
gdb.printing.register_pretty_printer(obj, __akantu_pretty_printers__)
else:
if obj is None:
obj = gdb
obj.pretty_printers.append(__akantu_pretty_printers__)

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