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;# $Id: xref.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: xref.pl,v $
;# Revision 3.0.1.2 1995/09/25 09:20:05 ram
;# patch59: added empty p_layout stub for new ?Y: directives
;#
;# Revision 3.0.1.1 1993/10/16 13:56:23 ram
;# patch12: declared p_public for ?P: lines
;#
;# Revision 3.0 1993/08/18 12:10:31 ram
;# Baseline for dist 3.0 netwide release.
;#
;# Metaxref-dependent part of the dependency extranction.
;#
# Process the ?W: lines
sub p_wanted {
# Syntax is ?W:<shell symbols>:<C symbols>
local($active) = $_[0] =~ /^([^:]*):/; # Symbols to activate
local($look_symbols) = $_[0] =~ /:(.*)/; # When those are used
local(@syms) = split(/ /, $look_symbols); # Keep original spacing info
$active =~ s/\s+/\n/g; # One symbol per line
# Concatenate quoted strings, so saying something like 'two words' will
# be introduced as one single symbol "two words".
local(@symbols); # Concatenated symbols to look for
local($concat) = ''; # Concatenation buffer
foreach (@syms) {
if (s/^\'//) {
$concat = $_;
} elsif (s/\'$//) {
push(@symbols, $concat . ' ' . $_);
$concat = '';
} else {
push(@symbols, $_) unless $concat;
$concat .= ' ' . $_ if $concat;
}
}
local($fake); # Fake unique shell symbol to reparent C symbol
# Now record symbols in master and wanted tables
foreach (@symbols) {
$cmaster{$_} = undef; # Asks for look-up in C files
# Make a fake C symbol and associate that with the wanted symbol
# so that later we know were it comes from
$fake = &gensym;
$cwanted{$_} = "$fake"; # Attached to this symbol
push(@Master, "?$unit:$fake=''"); # Fake initialization
}
}
# Ingnore the following:
sub p_init {}
sub p_default {}
sub p_library {}
sub p_include {}
sub p_public {}
sub p_layout {}
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