1 files changed, 90 insertions, 0 deletions
diff --git a/mkstatichdtbl.py b/mkstatichdtbl.py
new file mode 100755
index 0000000..feacd2a
--- /dev/null
+++ b/mkstatichdtbl.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# This scripts reads static table entries [1] and generates
+# token_stable and stable.  This table is used in lib/nghttp3_qpack.c.
+#
+# [1] https://quicwg.org/base-drafts/draft-ietf-quic-qpack.html#name-static-table-2
+
+import re, sys
+
+def hd_map_hash(name):
+  h = 2166136261
+
+  # FNV hash variant: http://isthe.com/chongo/tech/comp/fnv/
+  for c in name:
+    h ^= ord(c)
+    h *= 16777619
+    h &= 0xffffffff
+
+  return h
+
+class Header:
+  def __init__(self, idx, name, value):
+    self.idx = idx
+    self.name = name
+    self.value = value
+    self.token = -1
+
+entries = []
+for line in sys.stdin:
+    m = re.match(r'(\d+)\s+(\S+)\s+(\S.*)?', line)
+    val = m.group(3).strip() if m.group(3) else ''
+    entries.append(Header(int(m.group(1)), m.group(2), val))
+
+token_entries = sorted(entries, key=lambda ent: ent.name)
+
+token = 0
+seq = 0
+name = token_entries[0].name
+for i, ent in enumerate(token_entries):
+    if name != ent.name:
+        name = ent.name
+        token = seq
+    seq += 1
+    ent.token = token
+
+def to_enum_hd(k):
+    res = 'NGHTTP3_QPACK_TOKEN_'
+    for c in k.upper():
+        if c == ':' or c == '-':
+            res += '_'
+            continue
+        res += c
+    return res
+
+def gen_enum(entries):
+    used = {}
+    print('typedef enum nghttp3_qpack_token {')
+    for ent in entries:
+        if ent.name in used:
+            continue
+        used[ent.name] = True
+        enumname = to_enum_hd(ent.name)
+        print('''\
+  /**
+   * :enum:`{enumname}` is a token for ``{name}``.
+   */'''.format(enumname=enumname, name=ent.name))
+        if ent.token is None:
+            print('  {},'.format(enumname))
+        else:
+            print('  {} = {},'.format(enumname, ent.token))
+    print('} nghttp3_qpack_token;')
+
+gen_enum(entries)
+
+print()
+
+print('static nghttp3_qpack_static_entry token_stable[] = {')
+for i, ent in enumerate(token_entries):
+    print('MAKE_STATIC_ENT({}, {}, {}u),'\
+          .format(ent.idx, to_enum_hd(ent.name), hd_map_hash(ent.name)))
+print('};')
+
+print()
+
+print('static nghttp3_qpack_static_header stable[] = {')
+for ent in entries:
+    print('MAKE_STATIC_HD("{}", "{}", {}),'\
+          .format(ent.name, ent.value, to_enum_hd(ent.name)))
+print('};')