freebsd-nq/sys/teken/gensequences
Jean-Sébastien Pédron 8dcd2ed3c9 teken, vt(4): Parse the "Cursor style" escape sequence
The escape sequence (e.g. `^[[2 q`) was unsupported before and the
letter `q` was displayed as a typed character. The sequence is used by
Neovim for instance.

Now, it is properly parsed. However, it is ignored, so it won't change
the cursor style.

Because the escape sequence contains a space character, the
`gensequences` script had to be modified to support that. In the
`sequences` file, a space is represented as the string `SP`.
2018-05-20 14:21:20 +00:00

167 lines
4.2 KiB
Awk

#!/usr/bin/awk -f
#-
# Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
# 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 THE 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.
#
# $FreeBSD$
function die(msg) {
print msg;
exit 1;
}
function cchar(str) {
if (str == "^[")
return "\\x1B";
if (str == "SP")
return " ";
return str;
}
function csequence(str) {
if (str == "SP")
return " ";
return str;
}
BEGIN {
FS = "\t+"
while (getline > 0) {
if (NF == 0 || $1 ~ /^#/)
continue;
if (NF != 3 && NF != 4)
die("Invalid line layout: " NF " columns");
split($3, sequence, " +");
nsequences = 0;
for (s in sequence)
nsequences++;
prefix = "";
l_prefix_name[""] = "teken_state_init";
for (i = 1; i < nsequences; i++) {
n = prefix csequence(sequence[i]);
l_prefix_parent[n] = prefix;
l_prefix_suffix[n] = sequence[i];
if (!l_prefix_name[n])
l_prefix_name[n] = "teken_state_" ++npr;
prefix = n;
}
suffix = sequence[nsequences];
cmd = prefix suffix;
# Fill lists
if (l_cmd_name[cmd] != "")
die(cmd " already exists");
l_cmd_prefix[cmd] = prefix;
l_cmd_suffix[cmd] = suffix;
l_cmd_args[cmd] = $4;
l_cmd_abbr[cmd] = $1;
l_cmd_name[cmd] = $2;
l_cmd_c_name[cmd] = "teken_subr_" tolower($2);
gsub(" ", "_", l_cmd_c_name[cmd]);
if ($4 != "")
l_prefix_numbercmds[prefix]++;
}
print "/* Generated file. Do not edit. */";
print "";
for (p in l_prefix_name) {
if (l_prefix_name[p] != "teken_state_init")
print "static teken_state_t " l_prefix_name[p] ";";
}
for (p in l_prefix_name) {
print "";
print "/* '" p "' */";
print "static void";
print l_prefix_name[p] "(teken_t *t, teken_char_t c)";
print "{";
if (l_prefix_numbercmds[p] > 0) {
print "";
print "\tif (teken_state_numbers(t, c))";
print "\t\treturn;";
}
print "";
print "\tswitch (c) {";
for (c in l_cmd_prefix) {
if (l_cmd_prefix[c] != p)
continue;
print "\tcase '" cchar(l_cmd_suffix[c]) "': /* " l_cmd_abbr[c] ": " l_cmd_name[c] " */";
if (l_cmd_args[c] == "v") {
print "\t\t" l_cmd_c_name[c] "(t, t->t_curnum, t->t_nums);";
} else {
printf "\t\t%s(t", l_cmd_c_name[c];
split(l_cmd_args[c], args, " ");
for (a = 1; args[a] != ""; a++) {
if (args[a] == "n")
printf ", (t->t_curnum < %d || t->t_nums[%d] == 0) ? 1 : t->t_nums[%d]", a, (a - 1), (a - 1);
else if (args[a] == "r")
printf ", t->t_curnum < %d ? 0 : t->t_nums[%d]", a, (a - 1);
else
die("Invalid argument type: " args[a]);
}
print ");";
}
print "\t\tbreak;";
}
for (pc in l_prefix_parent) {
if (l_prefix_parent[pc] != p)
continue;
print "\tcase '" cchar(l_prefix_suffix[pc]) "':";
print "\t\tteken_state_switch(t, " l_prefix_name[pc] ");";
print "\t\treturn;";
}
print "\tdefault:";
if (l_prefix_name[p] == "teken_state_init") {
print "\t\tteken_subr_regular_character(t, c);";
} else {
print "\t\tteken_printf(\"Unsupported sequence in " l_prefix_name[p] ": %u\\n\", (unsigned int)c);";
}
print "\t\tbreak;";
print "\t}";
if (l_prefix_name[p] != "teken_state_init") {
print "";
print "\tteken_state_switch(t, teken_state_init);";
}
print "}";
}
}