50 lines
1.3 KiB
Python
50 lines
1.3 KiB
Python
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import math
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from fhex.words import ADJECTIVE, PARTICIPLE, NOUN, PHONETIC
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DEFAULT_FORMAT_DEF = {
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"A": ADJECTIVE,
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"P": PARTICIPLE,
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"N": NOUN,
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"F": PHONETIC,
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}
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def hex_to_friendly(hex_str, format_str):
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hex_i, fmt_i = 0, 0
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words = []
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fmt_def = DEFAULT_FORMAT_DEF
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while hex_i < len(hex_str):
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if fmt_i >= len(format_str):
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raise Exception("Format string is too short")
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fmt_code = format_str[fmt_i]
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if fmt_code not in fmt_def:
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raise Exception(f"Unrecognized format code: {fmt_code}")
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fmt_list = fmt_def[fmt_code]
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fmt_len = math.log(len(fmt_list), 16)
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if fmt_len % 1 != 0:
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raise Exception(
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f"Word list for {fmt_code} must be a power of 16" +
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" (length: {len(fmt_list)})")
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fmt_len = int(fmt_len)
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if hex_i + fmt_len > len(hex_str):
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raise Exception(f"Not enough hex characters for format code {fmt_code}")
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hex_part = hex_str[hex_i:hex_i + fmt_len]
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fmt_list_i = int(hex_part, 16)
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word = fmt_list[fmt_list_i]
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words.append(word)
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hex_i += fmt_len
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fmt_i += 1
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if fmt_i != len(format_str):
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raise Exception("Format string is too long")
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return words
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