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#!/usr/bin/env python3
HEADERS = [
(':authority', 0),
(':method', 1),
(':method', 2),
(':path', 3),
(':path', 4),
(':scheme', 5),
(':scheme', 6),
(':status', 7),
(':status', 8),
(':status', 9),
(':status', 10),
(':status', 11),
(':status', 12),
(':status', 13),
('accept-charset', 14),
('accept-encoding', 15),
('accept-language', 16),
('accept-ranges', 17),
('accept', 18),
('access-control-allow-origin', 19),
('age', 20),
('allow', 21),
('authorization', 22),
('cache-control', 23),
('content-disposition', 24),
('content-encoding', 25),
('content-language', 26),
('content-length', 27),
('content-location', 28),
('content-range', 29),
('content-type', 30),
('cookie', 31),
('date', 32),
('etag', 33),
('expect', 34),
('expires', 35),
('from', 36),
('host', 37),
('if-match', 38),
('if-modified-since', 39),
('if-none-match', 40),
('if-range', 41),
('if-unmodified-since', 42),
('last-modified', 43),
('link', 44),
('location', 45),
('max-forwards', 46),
('proxy-authenticate', 47),
('proxy-authorization', 48),
('range', 49),
('referer', 50),
('refresh', 51),
('retry-after', 52),
('server', 53),
('set-cookie', 54),
('strict-transport-security', 55),
('transfer-encoding', 56),
('user-agent', 57),
('vary', 58),
('via', 59),
('www-authenticate', 60),
('te', None),
('connection', None),
('keep-alive',None),
('proxy-connection', None),
('upgrade', None),
(':protocol', None),
('priority', None),
]
def to_enum_hd(k):
res = 'NGHTTP2_TOKEN_'
for c in k.upper():
if c == ':' or c == '-':
res += '_'
continue
res += c
return res
def build_header(headers):
res = {}
for k, _ in headers:
size = len(k)
if size not in res:
res[size] = {}
ent = res[size]
c = k[-1]
if c not in ent:
ent[c] = []
if k not in ent[c]:
ent[c].append(k)
return res
def gen_enum():
name = ''
print('typedef enum {')
for k, token in HEADERS:
if token is None:
print(' {},'.format(to_enum_hd(k)))
else:
if name != k:
name = k
print(' {} = {},'.format(to_enum_hd(k), token))
print('} nghttp2_token;')
def gen_index_header():
print('''\
static int32_t lookup_token(const uint8_t *name, size_t namelen) {
switch (namelen) {''')
b = build_header(HEADERS)
for size in sorted(b.keys()):
ents = b[size]
print('''\
case {}:'''.format(size))
print('''\
switch (name[{}]) {{'''.format(size - 1))
for c in sorted(ents.keys()):
headers = sorted(ents[c])
print('''\
case '{}':'''.format(c))
for k in headers:
print('''\
if (memeq("{}", name, {})) {{
return {};
}}'''.format(k[:-1], size - 1, to_enum_hd(k)))
print('''\
break;''')
print('''\
}
break;''')
print('''\
}
return -1;
}''')
if __name__ == '__main__':
gen_enum()
print()
gen_index_header()
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