makeqstrdata: reclaim some more bytes on some translations

If a translation only has unicode code points 255 and below, the "values"
array can be 8 bits instead of 16 bits.  This reclaims some code size,
e.g., in a local build, trinket_m0 / en_US reclaimed 112 bytes and de_DE
reclaimed 104 bytes.  However, languages like zh_Latn_pinyin, which use
code points above 255, did not benefit.
crypto-aes
Jeff Epler 3 years ago
parent 879e1041c9
commit 1a0dcb5caa
  1. 3
      py/makeqstrdata.py

@ -131,9 +131,10 @@ def compute_huffman_coding(translations, qstrs, compression_filename):
print("// values", values, "lengths", len(lengths), lengths)
print("// estimated total memory size", len(lengths) + 2*len(values) + sum(len(cb[u]) for u in all_strings_concat))
print("//", values, lengths)
values_type = "uint16_t" if max(ord(u) for u in values) > 255 else "uint8_t"
with open(compression_filename, "w") as f:
f.write("const uint8_t lengths[] = {{ {} }};\n".format(", ".join(map(str, lengths))))
f.write("const uint16_t values[] = {{ {} }};\n".format(", ".join(str(ord(u)) for u in values)))
f.write("const {} values[] = {{ {} }};\n".format(values_type, ", ".join(str(ord(u)) for u in values)))
return values, lengths
def decompress(encoding_table, length, encoded):

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