56 lines
1.4 KiB
Python
56 lines
1.4 KiB
Python
# This script exists to auto-generate Http2HuffmanOutgoing.h from the table
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# contained in the HPACK spec. It's pretty simple to run:
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# python make_outgoing_tables.py < http2_huffman_table.txt > Http2HuffmanOutgoing.h
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# where huff_outgoing.txt is copy/pasted text from the latest version of the
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# HPACK spec, with all non-relevant lines removed (the most recent version
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# of huff_outgoing.txt also lives in this directory as an example).
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import sys
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sys.stdout.write('''/*
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* THIS FILE IS AUTO-GENERATED. DO NOT EDIT!
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*/
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#ifndef mozilla__net__Http2HuffmanOutgoing_h
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#define mozilla__net__Http2HuffmanOutgoing_h
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namespace mozilla {
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namespace net {
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struct HuffmanOutgoingEntry {
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uint32_t mValue;
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uint8_t mLength;
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};
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static HuffmanOutgoingEntry HuffmanOutgoing[] = {
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''')
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entries = []
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for line in sys.stdin:
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line = line.strip()
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obracket = line.rfind('[')
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nbits = int(line[obracket + 1:-1])
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lastbar = line.rfind('|')
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space = line.find(' ', lastbar)
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encend = line.rfind(' ', 0, obracket)
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enc = line[space:encend].strip()
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val = int(enc, 16)
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entries.append({'length': nbits, 'value': val})
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line = []
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for i, e in enumerate(entries):
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sys.stdout.write(' { 0x%08x, %s }' %
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(e['value'], e['length']))
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if i < (len(entries) - 1):
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sys.stdout.write(',')
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sys.stdout.write('\n')
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sys.stdout.write('''};
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} // namespace net
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} // namespace mozilla
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#endif // mozilla__net__Http2HuffmanOutgoing_h
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''')
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