kc3-lang/SDL/src/joystick/sort_controllers.py

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• Hash : 81afb3e3
  Author :
  Date : 2022-10-05T16:18:09
  

  Need to swap endianness when extracting the CRC from game controller mappings

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• src/joystick/sort_controllers.py

• #!/usr/bin/env python3
  #
  # Script to sort the game controller database entries in SDL_gamecontroller.c
  
  import re
  
  
  filename = "SDL_gamecontrollerdb.h"
  input = open(filename)
  output = open(f"{filename}.new", "w")
  parsing_controllers = False
  controllers = []
  controller_guids = {}
  conditionals = []
  split_pattern = re.compile(r'([^"]*")([^,]*,)([^,]*,)([^"]*)(".*)')
  guid_crc_pattern = re.compile(r'^([0-9a-zA-Z]{4})([0-9a-zA-Z]{2})([0-9a-zA-Z]{2})([0-9a-zA-Z]{24},)$')
  
  def find_element(prefix, bindings):
      i=0
      for element in bindings:
          if element.startswith(prefix):
              return i
          i=(i + 1)
  
      return -1
         
  def save_controller(line):
      global controllers
      match = split_pattern.match(line)
      entry = [ match.group(1), match.group(2), match.group(3) ]
      bindings = sorted(match.group(4).split(","))
      if (bindings[0] == ""):
          bindings.pop(0)
  
      crc = ""
      pos = find_element("crc:", bindings)
      if pos >= 0:
          crc = bindings[pos] + ","
          bindings.pop(pos)
  
      # Look for CRC embedded in the GUID and convert to crc element
      crc_match = guid_crc_pattern.match(entry[1])
      if crc_match and crc_match.group(2) != '00' and crc_match.group(3) != '00':
          print("Extracting CRC from GUID of " + entry[2])
          entry[1] = crc_match.group(1) + '0000' + crc_match.group(4)
          crc = "crc:" + crc_match.group(3) + crc_match.group(2) + ","
  
      pos = find_element("sdk", bindings)
      if pos >= 0:
          bindings.append(bindings.pop(pos))
  
      pos = find_element("hint:", bindings)
      if pos >= 0:
          bindings.append(bindings.pop(pos))
  
      entry.extend(crc)
      entry.extend(",".join(bindings) + ",")
      entry.append(match.group(5))
      controllers.append(entry)
  
      entry_id = entry[1] + entry[3]
      if ',sdk' in line or ',hint:' in line:
          conditionals.append(entry_id)
  
  def write_controllers():
      global controllers
      global controller_guids
      # Check for duplicates
      for entry in controllers:
          entry_id = entry[1] + entry[3]
          if (entry_id in controller_guids and entry_id not in conditionals):
              current_name = entry[2]
              existing_name = controller_guids[entry_id][2]
              print("Warning: entry '%s' is duplicate of entry '%s'" % (current_name, existing_name))
  
              if (not current_name.startswith("(DUPE)")):
                  entry[2] = f"(DUPE) {current_name}"
  
              if (not existing_name.startswith("(DUPE)")):
                  controller_guids[entry_id][2] = f"(DUPE) {existing_name}"
  
          controller_guids[entry_id] = entry
  
      for entry in sorted(controllers, key=lambda entry: f"{entry[2]}-{entry[1]}"):
          line = "".join(entry) + "\n"
          line = line.replace("\t", "    ")
          if not line.endswith(",\n") and not line.endswith("*/\n") and not line.endswith(",\r\n") and not line.endswith("*/\r\n"):
              print("Warning: '%s' is missing a comma at the end of the line" % (line))
          output.write(line)
  
      controllers = []
      controller_guids = {}
  
  for line in input:
      if parsing_controllers:
          if (line.startswith("{")):
              output.write(line)
          elif (line.startswith("    NULL")):
              parsing_controllers = False
              write_controllers()
              output.write(line)
          elif (line.startswith("#if")):
              print(f"Parsing {line.strip()}")
              output.write(line)
          elif (line.startswith("#endif")):
              write_controllers()
              output.write(line)
          else:
              save_controller(line)
      else:
          if (line.startswith("static const char *s_ControllerMappings")):
              parsing_controllers = True
  
          output.write(line)
  
  output.close()
  print(f"Finished writing {filename}.new")
  

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