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|
#
# Gtags.pl --- Global facility for Nvi-1.81
#
# Copyright (c) 2001, 2002 Tama Communications Corporation
#
# This file is part of GNU GLOBAL.
#
# GNU GLOBAL 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 2, or (at your option)
# any later version.
#
# GNU GLOBAL 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# usage:
#
# nvi editor command line
# -----------------------------------------------------------
# :perl tag qw(main) global -x main
# :perl tag qw(-T main) global -Tx main
# :perl tag qw(-r main) global -rx main
# :perl tag qw(-sl main) global -slx main
# :perl tag qw(-gi main) global -gix main
# :perl tag qw(-I main) global -Ix main
# :perl tag qw(-P file) global -Px file
# :perl tag qw(-f %) global -fx <current file>
# :perl gozilla gozilla +<current line> <current file>
#
# Please type ':perl help[ENTER]' for help.
#
# Suggested .nexrc: (If you have gtags.pl in ${HOME}/perl.)
#
# perl use lib "$ENV{HOME}/perl"
# perl require 'gtags.pl'
# map ^P :tagprev^M
# map ^N :tagnext^M
# map ^] :perl tag^M
# map ^G :perl gozilla^M
# ab gtag perl tag qw(
# ab gta perl tag qw(
# ab gt perl tag qw(
# ab gozill perl gozilla
# ab gozil perl gozilla
# ab gozi perl gozilla
# ab goz perl gozilla
#
# You need this version of GLOBAL.
#
$support_version = 4.3;
#
# command existent check.
#
$w32 = ($^O =~ /^(ms)?(dos|win(32|nt))/i) ? 1 : 0;
$pathsep = ($w32) ? ';' : ':';
$command = '';
foreach (split(/$pathsep/, $ENV{'PATH'})) {
if (-x "$_/global") {
$command = "$_/global";
last;
}
}
#
# version check of global(1).
#
$notfound = '';
if ($command) {
open(TAGS, "$command --version |");
$_ = <TAGS>;
chop($_);
$version = $_;
close(TAGS);
$version =~ s/(\d+\.\d+)(\.\d+)?/\1/;
if ($? != 0 || $version < $support_version) {
$notfound = "Your global(1) seems to be older version.";
}
} else {
$notfound = "Global(1) not found.";
}
if ($notfound) {
$notfound .= " You need GLOBAL-${support_version} or the later.";
}
sub main::tag {
my $tagq, $tag, $flag;
if ($notfound) {
$curscr->Msg($notfound);
return;
}
$flag = '';
while ($_[0] =~ /^-\w+$/) {
if ($_[0] =~ /^-([fgIPilrsTx]+)$/) {
$flag .= $1;
shift;
} else {
$curscr->Msg("'$_[0]' not acceptable. Please type ':perl help[ENTER]'.");
return;
}
}
if ($flag =~ /r/ && $flag =~ /s/) {
$curscr->Msg("both of -s and -r are not allowed.");
return;
}
if ($_[0]) {
$tag = $_[0];
#
# replace '%' with current file name.
#
if ($tag =~ /%/) {
$path = $curscr->GetFileName();
$tag =~ s/%/$path/;
} else {
}
} else {
#
# get current position.
#
my($lineno, $column) = $curscr->GetCursor();
my($line) = $curscr->GetLine($lineno);
my($length) = length($line);
#
# extract the first word as a tag.
#
my($offset) = $column;
while ($offset > 0 && substr($line, $offset, 1) =~ /^\w/) {
$offset--;
}
while ($offset < $length && substr($line, $offset, 1) !~ /^\w/) {
$offset++;
}
my($subline) = substr($line, $offset);
($tag, $blace) = ($subline =~ /(\w+)\s*(\(?)/);
if (!$tag) {
$curscr->Msg("tag not found in current position.");
return;
}
#
# decide flag value.
#
$flag = 's';
if ($offset == 0) {
if ($blace) {
$flag = 'r'; # maybe function definition.
}
} else {
if ($line =~ /^#\s*define\s+(\w+)\(/ && $1 eq $tag) {
$flag = 'r'; # maybe macro definition.
} elsif ($line =~ /^(ENTRY|ALTENTRY|NENTRY)\((\w+)\)$/ && $2 eq $tag) {
$flag = 'r'; # maybe assember function definition.
} elsif ($blace) {
$flag = 'x'; # maybe function reference.
}
}
}
open(TAGS, "$command -xq$flag '$tag' |");
$tagq = undef;
while(<TAGS>) {
my ($name, $lno, $path, $rest);
if ((($name, $lno, $path, $rest) = /^([^ \t]+)[ \t]+(\d+)[ \t]+([^ \t]+)(.*)$/) >= 2) {
if (!$tagq) {
$tagq = $curscr->TagQ($tag);
}
$tagq->Add($path, $lno, '');
}
}
close(TAGS);
$status = $?;
$status = $status / 256;
if ($status == 0) {
if (!$tagq) {
$curscr->Msg("$tag: tag not found.");
} else {
$tagq->Push();
}
} elsif ($status == 1) {
$curscr->Msg("Global(1) failed. Please test it out of nvi.");
} elsif ($status == 2) {
$curscr->Msg("Usage error. Please type ':perl help[ENTER]'.");
} elsif ($status == 3) {
$curscr->Msg("GTAGS not found.");
} else {
$curscr->Msg("Unknown error.");
}
}
sub main::gozilla {
if ($notfound) {
$curscr->Msg($notfound);
return;
}
my($filename) = $curscr->GetFileName();
my($lineno, $column) = $curscr->GetCursor();
system("gozilla +$lineno $filename");
}
sub main::help {
$help = <<END_OF_HELP;
Commands:
-f files: Print all function definitions in the files.
-g pattern: Print all lines which match to the pattern.
-I pattern: Print all lines which match to the pattern.
-P pattern: Print the path which match to the pattern.
Options:
-i: ignore case distinctions in pattern.
-l: Print just objects which exist under the current directory.
-r: Print the locations of object references.
-s: Print the locations of specified symbol other than function names.
-T: Go through all the tag files listed in GTAGSLIBPATH.
END_OF_HELP
$curscr->Msg($help);
}
1;
|
