debug/gdb/printers.py - manifest_repos/eigen - Git at Google

 # -*- coding: utf-8 -*-
 # This file is part of Eigen, a lightweight C++ template library
 # for linear algebra.
 #
 # Copyright (C) 2009 Benjamin Schindler <bschindler@inf.ethz.ch>
 #
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

 # Pretty printers for Eigen::Matrix
 # This is still pretty basic as the python extension to gdb is still pretty basic.
 # It cannot handle complex eigen types and it doesn't support any of the other eigen types
 # Such as quaternion or some other type.
 # This code supports fixed size as well as dynamic size matrices

 # To use it:
 #
 # * Create a directory and put the file as well as an empty __init__.py in
 #   that directory.
 # * Create a ~/.gdbinit file, that contains the following:
 #      python
 #      import sys
 #      sys.path.insert(0, '/path/to/eigen/printer/directory')
 #      from printers import register_eigen_printers
 #      register_eigen_printers (None)
 #      end

 import gdb
 import re
 import itertools


 class EigenMatrixPrinter:
 	"Print Eigen Matrix or Array of some kind"

 	def __init__(self, variety, val):
 		"Extract all the necessary information"

 		# Save the variety (presumably "Matrix" or "Array") for later usage
 		self.variety = variety

 		# The gdb extension does not support value template arguments - need to extract them by hand
 		type = val.type
 		if type.code == gdb.TYPE_CODE_REF:
 			type = type.target()
 		self.type = type.unqualified().strip_typedefs()
 		tag = self.type.tag
 		regex = re.compile('\<.*\>')
 		m = regex.findall(tag)[0][1:-1]
 		template_params = m.split(',')
 		template_params = [x.replace(" ", "") for x in template_params]

 		if template_params[1] == '-0x00000000000000001' or template_params[1] == '-0x000000001' or template_params[1] == '-1':
 			self.rows = val['m_storage']['m_rows']
 		else:
 			self.rows = int(template_params[1])

 		if template_params[2] == '-0x00000000000000001' or template_params[2] == '-0x000000001' or template_params[2] == '-1':
 			self.cols = val['m_storage']['m_cols']
 		else:
 			self.cols = int(template_params[2])

 		self.options = 0 # default value
 		if len(template_params) > 3:
 			self.options = template_params[3];

 		self.rowMajor = (int(self.options) & 0x1)

 		self.innerType = self.type.template_argument(0)

 		self.val = val

 		# Fixed size matrices have a struct as their storage, so we need to walk through this
 		self.data = self.val['m_storage']['m_data']
 		if self.data.type.code == gdb.TYPE_CODE_STRUCT:
 			self.data = self.data['array']
 			self.data = self.data.cast(self.innerType.pointer())

 	class _iterator:
 		def __init__ (self, rows, cols, dataPtr, rowMajor):
 			self.rows = rows
 			self.cols = cols
 			self.dataPtr = dataPtr
 			self.currentRow = 0
 			self.currentCol = 0
 			self.rowMajor = rowMajor

 		def __iter__ (self):
 			return self

 		def next(self):
                         return self.__next__()  # Python 2.x compatibility

 		def __next__(self):

 			row = self.currentRow
 			col = self.currentCol
 			if self.rowMajor == 0:
 				if self.currentCol >= self.cols:
 					raise StopIteration

 				self.currentRow = self.currentRow + 1
 				if self.currentRow >= self.rows:
 					self.currentRow = 0
 					self.currentCol = self.currentCol + 1
 			else:
 				if self.currentRow >= self.rows:
 					raise StopIteration

 				self.currentCol = self.currentCol + 1
 				if self.currentCol >= self.cols:
 					self.currentCol = 0
 					self.currentRow = self.currentRow + 1


 			item = self.dataPtr.dereference()
 			self.dataPtr = self.dataPtr + 1
 			if (self.cols == 1): #if it's a column vector
 				return ('[%d]' % (row,), item)
 			elif (self.rows == 1): #if it's a row vector
 				return ('[%d]' % (col,), item)
 			return ('[%d,%d]' % (row, col), item)

 	def children(self):

 		return self._iterator(self.rows, self.cols, self.data, self.rowMajor)

 	def to_string(self):
 		return "Eigen::%s<%s,%d,%d,%s> (data ptr: %s)" % (self.variety, self.innerType, self.rows, self.cols, "RowMajor" if self.rowMajor else  "ColMajor", self.data)

 class EigenQuaternionPrinter:
 	"Print an Eigen Quaternion"

 	def __init__(self, val):
 		"Extract all the necessary information"
 		# The gdb extension does not support value template arguments - need to extract them by hand
 		type = val.type
 		if type.code == gdb.TYPE_CODE_REF:
 			type = type.target()
 		self.type = type.unqualified().strip_typedefs()
 		self.innerType = self.type.template_argument(0)
 		self.val = val

 		# Quaternions have a struct as their storage, so we need to walk through this
 		self.data = self.val['m_coeffs']['m_storage']['m_data']['array']
 		self.data = self.data.cast(self.innerType.pointer())

 	class _iterator:
 		def __init__ (self, dataPtr):
 			self.dataPtr = dataPtr
 			self.currentElement = 0
 			self.elementNames = ['x', 'y', 'z', 'w']

 		def __iter__ (self):
 			return self

 		def next(self):
                         return self.__next__()  # Python 2.x compatibility

 		def __next__(self):
 			element = self.currentElement

 			if self.currentElement >= 4: #there are 4 elements in a quanternion
 				raise StopIteration

 			self.currentElement = self.currentElement + 1

 			item = self.dataPtr.dereference()
 			self.dataPtr = self.dataPtr + 1
 			return ('[%s]' % (self.elementNames[element],), item)

 	def children(self):

 		return self._iterator(self.data)

 	def to_string(self):
 		return "Eigen::Quaternion<%s> (data ptr: %s)" % (self.innerType, self.data)

 def build_eigen_dictionary ():
 	pretty_printers_dict[re.compile('^Eigen::Quaternion<.*>$')] = lambda val: EigenQuaternionPrinter(val)
 	pretty_printers_dict[re.compile('^Eigen::Matrix<.*>$')] = lambda val: EigenMatrixPrinter("Matrix", val)
 	pretty_printers_dict[re.compile('^Eigen::Array<.*>$')]  = lambda val: EigenMatrixPrinter("Array",  val)

 def register_eigen_printers(obj):
 	"Register eigen pretty-printers with objfile Obj"

 	if obj == None:
 		obj = gdb
 	obj.pretty_printers.append(lookup_function)

 def lookup_function(val):
 	"Look-up and return a pretty-printer that can print va."

 	type = val.type

 	if type.code == gdb.TYPE_CODE_REF:
 		type = type.target()

 	type = type.unqualified().strip_typedefs()

 	typename = type.tag
 	if typename == None:
 		return None

 	for function in pretty_printers_dict:
 		if function.search(typename):
 			return pretty_printers_dict[function](val)

 	return None

 pretty_printers_dict = {}

 build_eigen_dictionary ()
	# -- coding: utf-8 --
	# This file is part of Eigen, a lightweight C++ template library
	# for linear algebra.
	#
	# Copyright (C) 2009 Benjamin Schindler <bschindler@inf.ethz.ch>
	#
	# This Source Code Form is subject to the terms of the Mozilla Public
	# License, v. 2.0. If a copy of the MPL was not distributed with this
	# file, You can obtain one at http://mozilla.org/MPL/2.0/.

	# Pretty printers for Eigen::Matrix
	# This is still pretty basic as the python extension to gdb is still pretty basic.
	# It cannot handle complex eigen types and it doesn't support any of the other eigen types
	# Such as quaternion or some other type.
	# This code supports fixed size as well as dynamic size matrices

	# To use it:
	#
	# * Create a directory and put the file as well as an empty __init__.py in
	# that directory.
	# * Create a ~/.gdbinit file, that contains the following:
	# python
	# import sys
	# sys.path.insert(0, '/path/to/eigen/printer/directory')
	# from printers import register_eigen_printers
	# register_eigen_printers (None)
	# end

	import gdb
	import re
	import itertools


	class EigenMatrixPrinter:
	"Print Eigen Matrix or Array of some kind"

	def __init__(self, variety, val):
	"Extract all the necessary information"

	# Save the variety (presumably "Matrix" or "Array") for later usage
	self.variety = variety

	# The gdb extension does not support value template arguments - need to extract them by hand
	type = val.type
	if type.code == gdb.TYPE_CODE_REF:
	type = type.target()
	self.type = type.unqualified().strip_typedefs()
	tag = self.type.tag
	regex = re.compile('\<.*\>')
	m = regex.findall(tag)[0][1:-1]
	template_params = m.split(',')
	template_params = [x.replace(" ", "") for x in template_params]

	if template_params[1] == '-0x00000000000000001' or template_params[1] == '-0x000000001' or template_params[1] == '-1':
	self.rows = val['m_storage']['m_rows']
	else:
	self.rows = int(template_params[1])

	if template_params[2] == '-0x00000000000000001' or template_params[2] == '-0x000000001' or template_params[2] == '-1':
	self.cols = val['m_storage']['m_cols']
	else:
	self.cols = int(template_params[2])

	self.options = 0 # default value
	if len(template_params) > 3:
	self.options = template_params[3];

	self.rowMajor = (int(self.options) & 0x1)

	self.innerType = self.type.template_argument(0)

	self.val = val

	# Fixed size matrices have a struct as their storage, so we need to walk through this
	self.data = self.val['m_storage']['m_data']
	if self.data.type.code == gdb.TYPE_CODE_STRUCT:
	self.data = self.data['array']
	self.data = self.data.cast(self.innerType.pointer())

	class _iterator:
	def __init__ (self, rows, cols, dataPtr, rowMajor):
	self.rows = rows
	self.cols = cols
	self.dataPtr = dataPtr
	self.currentRow = 0
	self.currentCol = 0
	self.rowMajor = rowMajor

	def __iter__ (self):
	return self

	def next(self):
	return self.__next__() # Python 2.x compatibility

	def __next__(self):

	row = self.currentRow
	col = self.currentCol
	if self.rowMajor == 0:
	if self.currentCol >= self.cols:
	raise StopIteration

	self.currentRow = self.currentRow + 1
	if self.currentRow >= self.rows:
	self.currentRow = 0
	self.currentCol = self.currentCol + 1
	else:
	if self.currentRow >= self.rows:
	raise StopIteration

	self.currentCol = self.currentCol + 1
	if self.currentCol >= self.cols:
	self.currentCol = 0
	self.currentRow = self.currentRow + 1


	item = self.dataPtr.dereference()
	self.dataPtr = self.dataPtr + 1
	if (self.cols == 1): #if it's a column vector
	return ('[%d]' % (row,), item)
	elif (self.rows == 1): #if it's a row vector
	return ('[%d]' % (col,), item)
	return ('[%d,%d]' % (row, col), item)

	def children(self):

	return self._iterator(self.rows, self.cols, self.data, self.rowMajor)

	def to_string(self):
	return "Eigen::%s<%s,%d,%d,%s> (data ptr: %s)" % (self.variety, self.innerType, self.rows, self.cols, "RowMajor" if self.rowMajor else "ColMajor", self.data)

	class EigenQuaternionPrinter:
	"Print an Eigen Quaternion"

	def __init__(self, val):
	"Extract all the necessary information"
	# The gdb extension does not support value template arguments - need to extract them by hand
	type = val.type
	if type.code == gdb.TYPE_CODE_REF:
	type = type.target()
	self.type = type.unqualified().strip_typedefs()
	self.innerType = self.type.template_argument(0)
	self.val = val

	# Quaternions have a struct as their storage, so we need to walk through this
	self.data = self.val['m_coeffs']['m_storage']['m_data']['array']
	self.data = self.data.cast(self.innerType.pointer())

	class _iterator:
	def __init__ (self, dataPtr):
	self.dataPtr = dataPtr
	self.currentElement = 0
	self.elementNames = ['x', 'y', 'z', 'w']

	def __iter__ (self):
	return self

	def next(self):
	return self.__next__() # Python 2.x compatibility

	def __next__(self):
	element = self.currentElement

	if self.currentElement >= 4: #there are 4 elements in a quanternion
	raise StopIteration

	self.currentElement = self.currentElement + 1

	item = self.dataPtr.dereference()
	self.dataPtr = self.dataPtr + 1
	return ('[%s]' % (self.elementNames[element],), item)

	def children(self):

	return self._iterator(self.data)

	def to_string(self):
	return "Eigen::Quaternion<%s> (data ptr: %s)" % (self.innerType, self.data)

	def build_eigen_dictionary ():
	pretty_printers_dict[re.compile('^Eigen::Quaternion<.*>$')] = lambda val: EigenQuaternionPrinter(val)
	pretty_printers_dict[re.compile('^Eigen::Matrix<.*>$')] = lambda val: EigenMatrixPrinter("Matrix", val)
	pretty_printers_dict[re.compile('^Eigen::Array<.*>$')] = lambda val: EigenMatrixPrinter("Array", val)

	def register_eigen_printers(obj):
	"Register eigen pretty-printers with objfile Obj"

	if obj == None:
	obj = gdb
	obj.pretty_printers.append(lookup_function)

	def lookup_function(val):
	"Look-up and return a pretty-printer that can print va."

	type = val.type

	if type.code == gdb.TYPE_CODE_REF:
	type = type.target()

	type = type.unqualified().strip_typedefs()

	typename = type.tag
	if typename == None:
	return None

	for function in pretty_printers_dict:
	if function.search(typename):
	return pretty_printers_dict[function](val)

	return None

	pretty_printers_dict = {}

	build_eigen_dictionary ()