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;# $Id: xwant.pl 1 2006-08-24 12:32:52Z rmanfredi $
;#
;# Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
;#
;# You may redistribute only under the terms of the Artistic Licence,
;# as specified in the README file that comes with the distribution.
;# You may reuse parts of this distribution only within the terms of
;# that same Artistic Licence; a copy of which may be found at the root
;# of the source tree for dist 4.0.
;#
;# $Log: xwant.pl,v $
;# Revision 3.0 1993/08/18 12:10:32 ram
;# Baseline for dist 3.0 netwide release.
;#
;#
;# These two arrays record the file names of the files which may (or may not)
;# contain shell or C symbols known by metaconfig.
;# @SHlist records the .SH files
;# @clist records the C-like files (i.e. .[chyl])
;#
# Parse files and build cross references
sub build_xref {
print "Building cross-reference files...\n" unless $opt_s;
unless (-f $NEWMANI) {
&manifake;
die "No $NEWMANI--don't know who to scan.\n" unless -f $NEWMANI;
}
open(FUI, "|sort | uniq >I.fui") || die "Can't create I.fui.\n";
open(UIF, "|sort | uniq >I.uif") || die "Can't create I.uif.\n";
local($search); # Where to-be-evaled script is held
local($_) = ' ' x 50000 if $opt_m; # Pre-extend pattern search space
local(%visited); # Records visited files
local(%lastfound); # Where last occurence of key was
# Map shell symbol names to units by reverse engineering the @Master array
# which records all the known shell symbols and the units where they
# are defined.
foreach $init (@Master) {
$init =~ /^\?(.*):(.*)=''/ && ($shwanted{"\$$2"} = $1);
}
# Now we are a little clever, and build a loop to eval so that we don't
# have to recompile our patterns on every file. We also use "study" since
# we are searching the same string for many different things. Hauls!
if (@clist) {
print " Scanning .[chyl] files for symbols...\n" unless $opt_s;
$search = ' ' x (40 * (@cmaster + @ocmaster)); # Pre-extend
$search = "while (<>) {study;\n"; # Init loop over ARGV
foreach $key (keys(cmaster)) {
$search .= "\$cmaster{'$key'} .= \"\$ARGV#\" if /\\b$key\\b/;\n";
}
foreach $key (grep(!/^\$/, keys %Obsolete)) {
$search .= "&ofound('$key') if /\\b$key\\b/;\n";
}
$search .= "}\n"; # terminate loop
print $search if $opt_d;
@ARGV = @clist;
# Swallow each file as a whole, if memory is available
undef $/ if $opt_m;
eval $search;
eval '';
$/ = "\n";
while (($key,$value) = each(cmaster)) {
next if $value eq '';
foreach $file (sort(split(/#/, $value))) {
next if $file eq '';
# %cwanted may contain value separated by \n -- take last one
@sym = split(/\n/, $cwanted{$key});
$sym = pop(@sym);
$shell = "\$$sym";
print FUI
pack("A35", $file),
pack("A20", "$shwanted{$shell}.U"),
$key, "\n";
print UIF
pack("A20", "$shwanted{$shell}.U"),
pack("A25", $key),
$file, "\n";
}
}
}
undef @clist;
undef %cwanted;
undef %cmaster; # We're not building Configure, we may delete this
%visited = ();
%lastfound = ();
if (@SHlist) {
print " Scanning .SH files for symbols...\n" unless $opt_s;
$search = ' ' x (40 * (@shmaster + @oshmaster)); # Pre-extend
$search = "while (<>) {study;\n";
# All the keys already have a leading '$'
foreach $key (keys(shmaster)) {
$search .= "\$shmaster{'$key'} .= \"\$ARGV#\" if /\\$key\\b/;\n";
}
foreach $key (grep (/^\$/, keys %Obsolete)) {
$search .= "&ofound('$key') if /\\$key\\b/;\n";
}
$search .= "}\n";
print $search if $opt_d;
@ARGV = @SHlist;
# Swallow each file as a whole, if memory is available
undef $/ if $opt_m;
eval $search;
eval '';
$/ = "\n";
while (($key,$value) = each(shmaster)) {
next if $value eq '';
foreach $file (sort(split(/#/, $value))) {
next if $file eq '';
print FUI
pack("A35", $file),
pack("A20", "$shwanted{$key}.U"),
$key, "\n";
print UIF
pack("A20", "$shwanted{$key}.U"),
pack("A25", $key),
$file, "\n";
}
}
}
close FUI;
close UIF;
# If obsolete symbols where found, write an Obsolete file which lists where
# each of them appear and the new symbol to be used. Also write Obsol_h.U
# and Obsol_sh.U in .MT for later perusal.
&dump_obsolete; # Dump obsolete symbols if any
# Clean-up memory by freeing useless data structures
undef @SHlist;
undef %shmaster;
}
# This routine records matches of obsolete keys (C or shell)
sub ofound {
local($key) = @_;
local($_) = $Obsolete{$key}; # Value of new symbol
$ofound{"$ARGV $key $_"}++; # Record obsolete match
$cmaster{$_} .= "$ARGV#" unless /^\$/; # A C hit
$shmaster{$_} .= "$ARGV#" if /^\$/; # Or a shell one
}
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