#!/bin/sh
#
# Written by Dridi Boukelmoune <dridi.boukelmoune@gmail.com>
#
# This file is in the public domain.
#
# 3.2.  Header Fields
#
#    Each header field consists of a case-insensitive field name followed
#    by a colon (":"), optional leading whitespace, the field value, and
#    optional trailing whitespace.
#
#      header-field   = field-name ":" OWS field-value OWS
#
#      field-name     = token
#      field-value    = *( field-content / obs-fold )
#      field-content  = field-vchar [ 1*( SP / HTAB ) field-vchar ]
#      field-vchar    = VCHAR / obs-text
#
#      obs-fold       = CRLF 1*( SP / HTAB )
#                     ; obsolete line folding
#                     ; see Section 3.2.4
#
#    [...]

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

tst_invalid_char() {
	printf '%s\n' "$1" | mk_enc
	tst_encode --expect-error CHR
}

mk_tbl </dev/null

_ -----------------------------------
_ Invalid characters for a field name
_ -----------------------------------

tst_invalid_char "literal str name: str value"
tst_invalid_char "literal str näme str value"

_ --------------------------------------------
_ Invalid control characters for a field value
_ --------------------------------------------

tst_invalid_char "literal str name str value"
tst_invalid_char "literal str name str value"

_ --------------------------------------------------
_ Horizontal tabulation is a valid control character
_ --------------------------------------------------

mk_hex <<EOF
0004 6e61 6d65 0c74 6162 6265 6409 7661 | ..name.tabbed.va
6c75 65                                 | lue
EOF

mk_msg <<EOF
name: tabbed	value
EOF

mk_enc <<EOF
literal str name str tabbed	value
EOF

tst_decode
tst_encode

_ --------------------------------------------
_ Tolerate obsolete characters in field values
_ --------------------------------------------

mk_hex <<EOF
0004 6e61 6d65 15c3 b662 73c3 b26c c3aa | ..name...bs..l..
74e1 babd 2076 c3a5 6cc3 ba65           | t... v..l..e
EOF

mk_msg <<EOF
name: öbsòlêtẽ vålúe
EOF

mk_enc <<EOF
literal str name str öbsòlêtẽ vålúe
EOF

tst_decode
tst_encode