add ymake export to ydb

1 files changed, 338 insertions, 0 deletions

diff --git a/contrib/tools/cython/Cython/Plex/Scanners.py b/contrib/tools/cython/Cython/Plex/Scanners.py
new file mode 100644
index 0000000000..88f7e2da3b
--- /dev/null
+++ b/contrib/tools/cython/Cython/Plex/Scanners.py
@@ -0,0 +1,338 @@
+# cython: auto_pickle=False
+#=======================================================================
+#
+#   Python Lexical Analyser
+#
+#
+#   Scanning an input stream
+#
+#=======================================================================
+
+from __future__ import absolute_import
+
+import cython
+
+cython.declare(BOL=object, EOL=object, EOF=object, NOT_FOUND=object)
+
+from . import Errors
+from .Regexps import BOL, EOL, EOF
+
+NOT_FOUND = object()
+
+
+class Scanner(object):
+    """
+    A Scanner is used to read tokens from a stream of characters
+    using the token set specified by a Plex.Lexicon.
+
+    Constructor:
+
+      Scanner(lexicon, stream, name = '')
+
+        See the docstring of the __init__ method for details.
+
+    Methods:
+
+      See the docstrings of the individual methods for more
+      information.
+
+      read() --> (value, text)
+        Reads the next lexical token from the stream.
+
+      position() --> (name, line, col)
+        Returns the position of the last token read using the
+        read() method.
+
+      begin(state_name)
+        Causes scanner to change state.
+
+      produce(value [, text])
+        Causes return of a token value to the caller of the
+        Scanner.
+
+    """
+
+    #  lexicon = None        # Lexicon
+    #  stream = None         # file-like object
+    #  name = ''
+    #  buffer = ''
+    #  buf_start_pos = 0     # position in input of start of buffer
+    #  next_pos = 0          # position in input of next char to read
+    #  cur_pos = 0           # position in input of current char
+    #  cur_line = 1          # line number of current char
+    #  cur_line_start = 0    # position in input of start of current line
+    #  start_pos = 0         # position in input of start of token
+    #  start_line = 0        # line number of start of token
+    #  start_col = 0         # position in line of start of token
+    #  text = None           # text of last token read
+    #  initial_state = None  # Node
+    #  state_name = ''       # Name of initial state
+    #  queue = None          # list of tokens to be returned
+    #  trace = 0
+
+    def __init__(self, lexicon, stream, name='', initial_pos=None):
+        """
+        Scanner(lexicon, stream, name = '')
+
+          |lexicon| is a Plex.Lexicon instance specifying the lexical tokens
+          to be recognised.
+
+          |stream| can be a file object or anything which implements a
+          compatible read() method.
+
+          |name| is optional, and may be the name of the file being
+          scanned or any other identifying string.
+        """
+        self.trace = 0
+
+        self.buffer = u''
+        self.buf_start_pos = 0
+        self.next_pos = 0
+        self.cur_pos = 0
+        self.cur_line = 1
+        self.start_pos = 0
+        self.start_line = 0
+        self.start_col = 0
+        self.text = None
+        self.state_name = None
+
+        self.lexicon = lexicon
+        self.stream = stream
+        self.name = name
+        self.queue = []
+        self.initial_state = None
+        self.begin('')
+        self.next_pos = 0
+        self.cur_pos = 0
+        self.cur_line_start = 0
+        self.cur_char = BOL
+        self.input_state = 1
+        if initial_pos is not None:
+            self.cur_line, self.cur_line_start = initial_pos[1], -initial_pos[2]
+
+    def read(self):
+        """
+        Read the next lexical token from the stream and return a
+        tuple (value, text), where |value| is the value associated with
+        the token as specified by the Lexicon, and |text| is the actual
+        string read from the stream. Returns (None, '') on end of file.
+        """
+        queue = self.queue
+        while not queue:
+            self.text, action = self.scan_a_token()
+            if action is None:
+                self.produce(None)
+                self.eof()
+            else:
+                value = action.perform(self, self.text)
+                if value is not None:
+                    self.produce(value)
+        result = queue[0]
+        del queue[0]
+        return result
+
+    def scan_a_token(self):
+        """
+        Read the next input sequence recognised by the machine
+        and return (text, action). Returns ('', None) on end of
+        file.
+        """
+        self.start_pos = self.cur_pos
+        self.start_line = self.cur_line
+        self.start_col = self.cur_pos - self.cur_line_start
+        action = self.run_machine_inlined()
+        if action is not None:
+            if self.trace:
+                print("Scanner: read: Performing %s %d:%d" % (
+                    action, self.start_pos, self.cur_pos))
+            text = self.buffer[
+                self.start_pos - self.buf_start_pos:
+                self.cur_pos - self.buf_start_pos]
+            return (text, action)
+        else:
+            if self.cur_pos == self.start_pos:
+                if self.cur_char is EOL:
+                    self.next_char()
+                if self.cur_char is None or self.cur_char is EOF:
+                    return (u'', None)
+            raise Errors.UnrecognizedInput(self, self.state_name)
+
+    def run_machine_inlined(self):
+        """
+        Inlined version of run_machine for speed.
+        """
+        state = self.initial_state
+        cur_pos = self.cur_pos
+        cur_line = self.cur_line
+        cur_line_start = self.cur_line_start
+        cur_char = self.cur_char
+        input_state = self.input_state
+        next_pos = self.next_pos
+        buffer = self.buffer
+        buf_start_pos = self.buf_start_pos
+        buf_len = len(buffer)
+        b_action, b_cur_pos, b_cur_line, b_cur_line_start, b_cur_char, b_input_state, b_next_pos = \
+            None, 0, 0, 0, u'', 0, 0
+        trace = self.trace
+        while 1:
+            if trace:  #TRACE#
+                print("State %d, %d/%d:%s -->" % (  #TRACE#
+                    state['number'], input_state, cur_pos, repr(cur_char)))  #TRACE#
+            # Begin inlined self.save_for_backup()
+            #action = state.action #@slow
+            action = state['action']  #@fast
+            if action is not None:
+                b_action, b_cur_pos, b_cur_line, b_cur_line_start, b_cur_char, b_input_state, b_next_pos = \
+                    action, cur_pos, cur_line, cur_line_start, cur_char, input_state, next_pos
+            # End inlined self.save_for_backup()
+            c = cur_char
+            #new_state = state.new_state(c) #@slow
+            new_state = state.get(c, NOT_FOUND)  #@fast
+            if new_state is NOT_FOUND:  #@fast
+                new_state = c and state.get('else')  #@fast
+            if new_state:
+                if trace:  #TRACE#
+                    print("State %d" % new_state['number'])  #TRACE#
+                state = new_state
+                # Begin inlined: self.next_char()
+                if input_state == 1:
+                    cur_pos = next_pos
+                    # Begin inlined: c = self.read_char()
+                    buf_index = next_pos - buf_start_pos
+                    if buf_index < buf_len:
+                        c = buffer[buf_index]
+                        next_pos += 1
+                    else:
+                        discard = self.start_pos - buf_start_pos
+                        data = self.stream.read(0x1000)
+                        buffer = self.buffer[discard:] + data
+                        self.buffer = buffer
+                        buf_start_pos += discard
+                        self.buf_start_pos = buf_start_pos
+                        buf_len = len(buffer)
+                        buf_index -= discard
+                        if data:
+                            c = buffer[buf_index]
+                            next_pos += 1
+                        else:
+                            c = u''
+                    # End inlined: c = self.read_char()
+                    if c == u'\n':
+                        cur_char = EOL
+                        input_state = 2
+                    elif not c:
+                        cur_char = EOL
+                        input_state = 4
+                    else:
+                        cur_char = c
+                elif input_state == 2:
+                    cur_char = u'\n'
+                    input_state = 3
+                elif input_state == 3:
+                    cur_line += 1
+                    cur_line_start = cur_pos = next_pos
+                    cur_char = BOL
+                    input_state = 1
+                elif input_state == 4:
+                    cur_char = EOF
+                    input_state = 5
+                else:  # input_state = 5
+                    cur_char = u''
+                    # End inlined self.next_char()
+            else:  # not new_state
+                if trace:  #TRACE#
+                    print("blocked")  #TRACE#
+                # Begin inlined: action = self.back_up()
+                if b_action is not None:
+                    (action, cur_pos, cur_line, cur_line_start,
+                     cur_char, input_state, next_pos) = \
+                        (b_action, b_cur_pos, b_cur_line, b_cur_line_start,
+                         b_cur_char, b_input_state, b_next_pos)
+                else:
+                    action = None
+                break  # while 1
+                # End inlined: action = self.back_up()
+        self.cur_pos = cur_pos
+        self.cur_line = cur_line
+        self.cur_line_start = cur_line_start
+        self.cur_char = cur_char
+        self.input_state = input_state
+        self.next_pos = next_pos
+        if trace:  #TRACE#
+            if action is not None:  #TRACE#
+                print("Doing %s" % action)  #TRACE#
+        return action
+
+    def next_char(self):
+        input_state = self.input_state
+        if self.trace:
+            print("Scanner: next: %s [%d] %d" % (" " * 20, input_state, self.cur_pos))
+        if input_state == 1:
+            self.cur_pos = self.next_pos
+            c = self.read_char()
+            if c == u'\n':
+                self.cur_char = EOL
+                self.input_state = 2
+            elif not c:
+                self.cur_char = EOL
+                self.input_state = 4
+            else:
+                self.cur_char = c
+        elif input_state == 2:
+            self.cur_char = u'\n'
+            self.input_state = 3
+        elif input_state == 3:
+            self.cur_line += 1
+            self.cur_line_start = self.cur_pos = self.next_pos
+            self.cur_char = BOL
+            self.input_state = 1
+        elif input_state == 4:
+            self.cur_char = EOF
+            self.input_state = 5
+        else:  # input_state = 5
+            self.cur_char = u''
+        if self.trace:
+            print("--> [%d] %d %r" % (input_state, self.cur_pos, self.cur_char))
+
+    def position(self):
+        """
+        Return a tuple (name, line, col) representing the location of
+        the last token read using the read() method. |name| is the
+        name that was provided to the Scanner constructor; |line|
+        is the line number in the stream (1-based); |col| is the
+        position within the line of the first character of the token
+        (0-based).
+        """
+        return (self.name, self.start_line, self.start_col)
+
+    def get_position(self):
+        """Python accessible wrapper around position(), only for error reporting.
+        """
+        return self.position()
+
+    def begin(self, state_name):
+        """Set the current state of the scanner to the named state."""
+        self.initial_state = (
+            self.lexicon.get_initial_state(state_name))
+        self.state_name = state_name
+
+    def produce(self, value, text=None):
+        """
+        Called from an action procedure, causes |value| to be returned
+        as the token value from read(). If |text| is supplied, it is
+        returned in place of the scanned text.
+
+        produce() can be called more than once during a single call to an action
+        procedure, in which case the tokens are queued up and returned one
+        at a time by subsequent calls to read(), until the queue is empty,
+        whereupon scanning resumes.
+        """
+        if text is None:
+            text = self.text
+        self.queue.append((value, text))
+
+    def eof(self):
+        """
+        Override this method if you want something to be done at
+        end of file.
+        """