CONTRIB: hpack: implement a reverse huffman table generator for hpack
This one was built by studying the HPACK Huffman table (RFC7541
appendix B). It creates 5 small tables (4*512 bytes, 1*64 bytes) to
map one byte at a time from the input stream based on the following
observations :
* rht_bit31_24[256] is indexed on bits 31..24 when < 0xfe
* rht_bit24_17[256] is indexed on bits 24..17 when 31..24 >= 0xfe
* rht_bit15_11_fe[32] is indexed on bits 15..11 when 24..17 == 0xfe
* rht_bit15_8[256] is indexed on bits 15..8 when 24..17 == 0xff
* rht_bit11_4[256] is indexed on bits 11..4 when 15..8 == 0xff
* when 11..4 == 0xff, 3..2 provide the following mapping :
* 00 => 0x0a, 01 => 0x0d, 10 => 0x16, 11 => EOS
diff --git a/contrib/hpack/Makefile b/contrib/hpack/Makefile
new file mode 100644
index 0000000..1ecc4e4
--- /dev/null
+++ b/contrib/hpack/Makefile
@@ -0,0 +1,9 @@
+CFLAGS = -O2 -W -Wall -Wextra -g
+OBJS = gen-rht
+
+all: $(OBJS)
+
+%: %.c
+
+clean:
+ -rm -vf $(OBJS) *.o *.a *~