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b9c1b51e45
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
119 lines
3.7 KiB
Python
Executable File
119 lines
3.7 KiB
Python
Executable File
"""
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# ===-- tree_utils.py ---------------------------------------*- Python -*-===//
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#
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# The LLVM Compiler Infrastructure
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#
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# This file is distributed under the University of Illinois Open Source
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# License. See LICENSE.TXT for details.
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#
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# ===---------------------------------------------------------------------===//
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tree_utils.py - A set of functions for examining binary
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search trees, based on the example search tree defined in
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dictionary.c. These functions contain calls to LLDB API
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functions, and assume that the LLDB Python module has been
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imported.
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For a thorough explanation of how the DFS function works, and
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for more information about dictionary.c go to
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http://lldb.llvm.org/scripting.html
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"""
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def DFS(root, word, cur_path):
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"""
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Recursively traverse a binary search tree containing
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words sorted alphabetically, searching for a particular
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word in the tree. Also maintains a string representing
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the path from the root of the tree to the current node.
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If the word is found in the tree, return the path string.
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Otherwise return an empty string.
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This function assumes the binary search tree is
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the one defined in dictionary.c It uses LLDB API
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functions to examine and traverse the tree nodes.
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"""
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# Get pointer field values out of node 'root'
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root_word_ptr = root.GetChildMemberWithName("word")
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left_child_ptr = root.GetChildMemberWithName("left")
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right_child_ptr = root.GetChildMemberWithName("right")
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# Get the word out of the word pointer and strip off
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# surrounding quotes (added by call to GetSummary).
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root_word = root_word_ptr.GetSummary()
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end = len(root_word) - 1
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if root_word[0] == '"' and root_word[end] == '"':
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root_word = root_word[1:end]
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end = len(root_word) - 1
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if root_word[0] == '\'' and root_word[end] == '\'':
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root_word = root_word[1:end]
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# Main depth first search
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if root_word == word:
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return cur_path
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elif word < root_word:
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# Check to see if left child is NULL
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if left_child_ptr.GetValue() is None:
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return ""
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else:
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cur_path = cur_path + "L"
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return DFS(left_child_ptr, word, cur_path)
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else:
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# Check to see if right child is NULL
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if right_child_ptr.GetValue() is None:
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return ""
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else:
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cur_path = cur_path + "R"
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return DFS(right_child_ptr, word, cur_path)
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def tree_size(root):
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"""
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Recursively traverse a binary search tree, counting
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the nodes in the tree. Returns the final count.
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This function assumes the binary search tree is
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the one defined in dictionary.c It uses LLDB API
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functions to examine and traverse the tree nodes.
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"""
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if (root.GetValue is None):
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return 0
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if (int(root.GetValue(), 16) == 0):
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return 0
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left_size = tree_size(root.GetChildAtIndex(1))
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right_size = tree_size(root.GetChildAtIndex(2))
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total_size = left_size + right_size + 1
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return total_size
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def print_tree(root):
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"""
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Recursively traverse a binary search tree, printing out
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the words at the nodes in alphabetical order (the
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search order for the binary tree).
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This function assumes the binary search tree is
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the one defined in dictionary.c It uses LLDB API
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functions to examine and traverse the tree nodes.
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"""
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if (root.GetChildAtIndex(1).GetValue() is not None) and (
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int(root.GetChildAtIndex(1).GetValue(), 16) != 0):
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print_tree(root.GetChildAtIndex(1))
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print root.GetChildAtIndex(0).GetSummary()
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if (root.GetChildAtIndex(2).GetValue() is not None) and (
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int(root.GetChildAtIndex(2).GetValue(), 16) != 0):
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print_tree(root.GetChildAtIndex(2))
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