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# -*- coding: utf-8 -*- # # Copyright (C) 2009-2018 the sqlparse authors and contributors # <see AUTHORS file> # # This module is part of python-sqlparse and is released under # the BSD License: https://opensource.org/licenses/BSD-3-Clause import itertools import re from collections import deque from contextlib import contextmanager from sqlparse.compat import text_type # This regular expression replaces the home-cooked parser that was here before. # It is much faster, but requires an extra post-processing step to get the # desired results (that are compatible with what you would expect from the # str.splitlines() method). # # It matches groups of characters: newlines, quoted strings, or unquoted text, # and splits on that basis. The post-processing step puts those back together # into the actual lines of SQL. SPLIT_REGEX = re.compile(r""" ( (?: # Start of non-capturing group (?:\r\n|\r|\n) | # Match any single newline, or [^\r\n'"]+ | # Match any character series without quotes or # newlines, or "(?:[^"\\]|\\.)*" | # Match double-quoted strings, or '(?:[^'\\]|\\.)*' # Match single quoted strings ) ) """, re.VERBOSE) LINE_MATCH = re.compile(r'(\r\n|\r|\n)') def split_unquoted_newlines(stmt): """Split a string on all unquoted newlines. Unlike str.splitlines(), this will ignore CR/LF/CR+LF if the requisite character is inside of a string.""" text = text_type(stmt) lines = SPLIT_REGEX.split(text) outputlines = [''] for line in lines: if not line: continue elif LINE_MATCH.match(line): outputlines.append('') else: outputlines[-1] += line return outputlines def remove_quotes(val): """Helper that removes surrounding quotes from strings.""" if val is None: return if val[0] in ('"', "'") and val[0] == val[-1]: val = val[1:-1] return val def recurse(*cls): """Function decorator to help with recursion :param cls: Classes to not recurse over :return: function """ def wrap(f): def wrapped_f(tlist): for sgroup in tlist.get_sublists(): if not isinstance(sgroup, cls): wrapped_f(sgroup) f(tlist) return wrapped_f return wrap def imt(token, i=None, m=None, t=None): """Helper function to simplify comparisons Instance, Match and TokenType :param token: :param i: Class or Tuple/List of Classes :param m: Tuple of TokenType & Value. Can be list of Tuple for multiple :param t: TokenType or Tuple/List of TokenTypes :return: bool """ clss = i types = [t, ] if t and not isinstance(t, list) else t mpatterns = [m, ] if m and not isinstance(m, list) else m if token is None: return False elif clss and isinstance(token, clss): return True elif mpatterns and any(token.match(*pattern) for pattern in mpatterns): return True elif types and any(token.ttype in ttype for ttype in types): return True else: return False def consume(iterator, n): """Advance the iterator n-steps ahead. If n is none, consume entirely.""" deque(itertools.islice(iterator, n), maxlen=0) @contextmanager def offset(filter_, n=0): filter_.offset += n yield filter_.offset -= n @contextmanager def indent(filter_, n=1): filter_.indent += n yield filter_.indent -= n