michael@0: # This script exists to auto-generate Http2HuffmanOutgoing.h from the table
michael@0: # contained in the HPACK spec. It's pretty simple to run:
michael@0: #   python make_outgoing_tables.py < http2_huffman_table.txt > Http2HuffmanOutgoing.h
michael@0: # where huff_outgoing.txt is copy/pasted text from the latest version of the
michael@0: # HPACK spec, with all non-relevant lines removed (the most recent version
michael@0: # of huff_outgoing.txt also lives in this directory as an example).
michael@0: import sys
michael@0: 
michael@0: sys.stdout.write('''/*
michael@0:  * THIS FILE IS AUTO-GENERATED. DO NOT EDIT!
michael@0:  */
michael@0: #ifndef mozilla__net__Http2HuffmanOutgoing_h
michael@0: #define mozilla__net__Http2HuffmanOutgoing_h
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace net {
michael@0: 
michael@0: struct HuffmanOutgoingEntry {
michael@0:   uint32_t mValue;
michael@0:   uint8_t mLength;
michael@0: };
michael@0: 
michael@0: static HuffmanOutgoingEntry HuffmanOutgoing[] = {
michael@0: ''')
michael@0: 
michael@0: entries = []
michael@0: for line in sys.stdin:
michael@0:     line = line.strip()
michael@0:     obracket = line.rfind('[')
michael@0:     nbits = int(line[obracket + 1:-1])
michael@0: 
michael@0:     encend = obracket - 1
michael@0:     hexits = nbits / 4
michael@0:     if hexits * 4 != nbits:
michael@0:         hexits += 1
michael@0: 
michael@0:     enc = line[encend - hexits:encend]
michael@0:     val = int(enc, 16)
michael@0: 
michael@0:     entries.append({'length': nbits, 'value': val})
michael@0: 
michael@0: line = []
michael@0: for i, e in enumerate(entries):
michael@0:     sys.stdout.write('  { 0x%08x, %s }' %
michael@0:                      (e['value'], e['length']))
michael@0:     if i < (len(entries) - 1):
michael@0:         sys.stdout.write(',')
michael@0:     sys.stdout.write('\n')
michael@0: 
michael@0: sys.stdout.write('''};
michael@0: 
michael@0: } // namespace net
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // mozilla__net__Http2HuffmanOutgoing_h
michael@0: ''')