#!/bin/sh
#
# Copyright (c) 2016 Dridi Boukelmoune
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

. "$(dirname "$0")"/common.sh

mk_msg </dev/null
mk_tbl </dev/null

_ -----------------
_ Invalid character
_ -----------------

mk_bin <<EOF
00000000 | Literal field without indexing
10000010 | Huffman string of 2 octets
11111111 | The null character (13 bits)
11000111 | Followed by '111' EOS
EOF

tst_decode --expect-error CHR

_ ----------------------------------------------------
_ Parse a Huffman string longer than the decode buffer
_ ----------------------------------------------------

# Because the most common character is conveniently '0' it can be used to
# represent both itself and its Huffman hexdump. Because the Huffman code
# is a 5-bit string of zeros, this test picks a big multiple of both 5 and
# 8 larger than 256: 1280. A Huffman string of 1280 5-bit characters will
# require 800 octets, so we put 1600 zeroes in the hexdump.
#
# In order to keep it contained, we use a literal header field with an
# indexed name:
#
# - 01     -> literal field with name index 1 (:authority)
# - ffa105 -> Huffman string of length 800

mk_chars 0 "01 ffa105 %1600s"           | mk_hex
mk_chars 0 ":authority: %1280s\n"       | mk_msg
mk_chars 0 "literal idx 1 huf %1280s\n" | mk_enc

tst_decode
tst_encode

_ ----------------------------------------------------
_ Decode a long Huffman string with invalid characters
_ ----------------------------------------------------

# To make matters simpler, we can use the horizontal tabulation that takes 24
# bits or 3 octets once coded. It's easy enough to embed and is illegal in a
# header field name.
#
# - 00     -> literal field without indexing
# - ffa405 -> Huffman string of length 803
# - ffffea -> Huffman coding for a tabulation

mk_chars 0 "00 ffa405 ffffea %1600s" | mk_hex
mk_msg </dev/null

tst_decode --expect-error CHR