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136 lines
4.6 KiB
136 lines
4.6 KiB
# Copyright (C) 2014 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from common.logger import Logger
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from file_format.checker.struct import TestExpression, TestStatement
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# Required for eval.
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import os
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import re
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def head_and_tail(list):
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return list[0], list[1:]
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def split_at_separators(expressions):
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""" Splits a list of TestExpressions at separators. """
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split_expressions = []
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word_start = 0
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for index, expression in enumerate(expressions):
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if expression.variant == TestExpression.Variant.SEPARATOR:
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split_expressions.append(expressions[word_start:index])
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word_start = index + 1
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split_expressions.append(expressions[word_start:])
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return split_expressions
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def get_variable(name, variables, pos):
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if name in variables:
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return variables[name]
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else:
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Logger.test_failed('Missing definition of variable "{}"'.format(name), pos, variables)
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def set_variable(name, value, variables, pos):
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if name not in variables:
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return variables.copy_with(name, value)
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else:
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Logger.test_failed('Multiple definitions of variable "{}"'.format(name), pos, variables)
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def match_words(checker_word, string_word, variables, pos):
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""" Attempts to match a list of TestExpressions against a string.
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Returns updated variable dictionary if successful and None otherwise.
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"""
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for expression in checker_word:
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# If `expression` is a variable reference, replace it with the value.
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if expression.variant == TestExpression.Variant.VAR_REF:
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pattern = re.escape(get_variable(expression.name, variables, pos))
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else:
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pattern = expression.text
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try:
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pattern = re.compile(pattern)
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except re.error as e:
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message = ('Invalid regex "{}" at {}:{},'
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' compiling fails with error: {}'.format(pattern, pos.filename, pos.line_no, e))
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raise RuntimeError(message)
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# Match the expression's regex pattern against the remainder of the word.
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# Note: re.match will succeed only if matched from the beginning.
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match = re.match(pattern, string_word)
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if not match:
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return None
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# If `expression` was a variable definition, set the variable's value.
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if expression.variant == TestExpression.Variant.VAR_DEF:
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variables = set_variable(expression.name, string_word[:match.end()], variables, pos)
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# Move cursor by deleting the matched characters.
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string_word = string_word[match.end():]
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# Make sure the entire word matched, i.e. `stringWord` is empty.
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if string_word:
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return None
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return variables
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def match_lines(checker_line, string_line, variables):
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""" Attempts to match a CHECK line against a string. Returns variable state
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after the match if successful and None otherwise.
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"""
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assert checker_line.variant != TestStatement.Variant.EVAL
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checker_words = split_at_separators(checker_line.expressions)
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string_words = string_line.split()
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while checker_words:
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# Get the next run of TestExpressions which must match one string word.
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checker_word, checker_words = head_and_tail(checker_words)
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# Keep reading words until a match is found.
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word_matched = False
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while string_words:
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string_word, string_words = head_and_tail(string_words)
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new_variables = match_words(checker_word, string_word, variables, checker_line)
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if new_variables is not None:
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word_matched = True
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variables = new_variables
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break
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if not word_matched:
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return None
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# All TestExpressions matched. Return new variable state.
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return variables
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def get_eval_text(expression, variables, pos):
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if expression.variant == TestExpression.Variant.PLAIN_TEXT:
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return expression.text
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else:
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assert expression.variant == TestExpression.Variant.VAR_REF
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return get_variable(expression.name, variables, pos)
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def evaluate_line(checker_line, variables):
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assert checker_line.is_eval_content_statement()
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# Required for eval.
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hasIsaFeature = lambda feature: variables["ISA_FEATURES"].get(feature, False)
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eval_string = "".join(get_eval_text(expr,
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variables,
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checker_line) for expr in checker_line.expressions)
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return eval(eval_string)
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