#!/usr/bin/env python2.7

# Copyright 2015 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

def esc_c(line):
  out = "\""
  last_was_hex = False
  for c in line:
    if 32 <= c < 127:
      if c in hex_bytes and last_was_hex:
        out += "\"\""
      if c != ord('"'):
        out += chr(c)
      else:
        out += "\\\""
      last_was_hex = False
    else:
      out += "\\x%02x" % c
      last_was_hex = True
  return out + "\""

done = set()

for message_length in range(0, 3):
  for send_message_length in range(0, message_length + 1):
    payload = [
      0,
      (message_length >> 24) & 0xff,
      (message_length >> 16) & 0xff,
      (message_length >> 8) & 0xff,
      (message_length) & 0xff
    ] + send_message_length * [0]
    for frame_length in range(0, len(payload) + 1):
      is_end = frame_length == len(payload) and send_message_length == message_length
      frame = [
        (frame_length >> 16) & 0xff,
        (frame_length >> 8) & 0xff,
        (frame_length) & 0xff,
        0,
        1 if is_end else 0,
        0, 0, 0, 1
      ] + payload[0:frame_length]
      text = esc_c(frame)
      if text not in done:
        print 'GRPC_RUN_BAD_CLIENT_TEST(verifier_%s, PFX_STR %s, %s);' % (
            'succeeds' if is_end else 'fails', 
            text, 
            '0' if is_end else 'GRPC_BAD_CLIENT_DISCONNECT')
        done.add(text)
