def add_string()

in library/scripts/string_pack.py [0:0]

• 19 lines of code
• 7 McCabe index (conditional complexity)

    def add_string(self, string):
        string_bytes = string.encode(encoding=self.encoding)
        bytes_len = len(string_bytes)
        if bytes_len == 0:  # empty string
            return 0, 0
        location = self.store.find(string_bytes)
        if location == -1:
            # Not found. But before trying to add it, see if a prefix of the new string
            # is at the end of the store buffer. If that's the case, we can save a few bytes
            # by sharing that.
            prefix = bytearray(string_bytes[:-1])
            while prefix and not self.store.endswith(prefix):
                del prefix[-1]
            if prefix:
                # Some part of the prefix remains, which means it matches the end of the buffer.
                start = len(self.store) - len(prefix)
                self.store += string_bytes[len(prefix) :]
            else:
                # Add the string to the end of the buffer.
                start = len(self.store)
                self.store += string_bytes
            return start, bytes_len
        else:
            return location, bytes_len