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# Extract all examples from the manual source. -*- AWK -*-
# This file is part of GNU Bison
# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2011 Free Software
# Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This script is for use with any Awk that conforms to POSIX.
# It was derived from a similar script tests/generate.awk in GNU m4.
#
# Usage: extexi input-file.texi ... -- [FILES to extract]
BEGIN {
if (!output_dir)
output_dir = ".";
for (argc = 1; argc < ARGC; ++argc)
if (ARGV[argc] == "--")
break;
for (i = argc + 1; i < ARGC; ++i)
file_wanted[ARGV[i]] = 1;
ARGC = argc;
}
/^@node / {
if (seq > 0)
print "AT_CLEANUP";
split ($0, tmp, ",");
node = substr(tmp[1], 7);
seq = 0;
}
/^@comment file: / {
if (!file_wanted[$3])
message("ignoring " $3);
else
{
message("extracting " $3);
file = $3;
}
}
/^@example$/, /^@end example$/ {
if (!file)
next;
if ($0 ~ /^@example$/)
{
input = files_output[file] ? "\n" : "";
# FNR is starting at 0 instead of 1, and
# #line report the line number of the *next* line.
# => + 2.
# Note that recent Bison support it, but not Flex.
if (file ~ /\.[chy]*$/)
input = "#line " (FNR + 1) " \"" FILENAME "\"\n";
next;
}
if ($0 ~ /^@end example$/)
{
if (input == "")
fatal("no contents: " file);
input = normalize(input);
# No spurious end of line: use printf.
if (files_output[file])
# The parens around the output file seem to be required
# by awk on Mac OS X Tiger (darwin 8.4.6).
printf ("%s", input) >> (output_dir "/" file);
else
printf ("%s", input) > (output_dir "/" file);
close (output_dir "/" file);
files_output[file] = 1;
file = input = "";
next;
}
input = input $0 "\n";
}
# We have to handle CONTENTS line per line, since anchors in AWK are
# referring to the whole string, not the lines.
function normalize(contents, i, lines, n, line, res) {
# Remove the Texinfo tags.
n = split (contents, lines, "\n");
# We don't want the last field which empty: it's behind the last \n.
for (i = 1; i < n; ++i)
{
line = lines[i];
# Whole line commands.
if (line ~ /^@(c |comment|dots|end (ignore|group)|ignore|group)/)
# Gperf accepts empty lines as valid input!!!
if (file ~ /\.gperf$/)
continue;
else
line = "";
gsub (/"@value\{VERSION\}"/, "\"" VERSION "\"", line)
gsub (/^@result\{\}/, "", line);
gsub (/^@error\{\}/, "", line);
gsub ("@[{]", "{", line);
gsub ("@}", "}", line);
gsub ("@@", "@", line);
gsub ("@comment.*", "", line);
res = res line "\n";
}
return res;
}
function message(msg) {
if (! message_printed[msg])
{
print "extexi: " msg > "/dev/stderr";
message_printed[msg] = 1;
}
}
function fatal(msg) {
message(msg);
exit 1
}
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