/usr/lib/ace/bin/split-cpp.pl is in libace-dev 6.4.5+dfsg-1build2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#! /usr/bin/perl
eval '(exit $?0)' && eval 'exec perl -w -S $0 ${1+"$@"}'
& eval 'exec perl -w -S $0 $argv:q'
if 0;
#
# Splits C++ source files into one file per function or data item.
#
# Author: David L. Levine, with much help and encouragment from
# Umar Syyid and Gonzalo A. Diethelm.
# Completed by Andrew Gilpin, July 2000
# Date: 10 November 1998
#
# For each C++ source file:
# 1) Extracts the "intro" code, i.e., #includes and declarations.
# 2) Identifies function definitions, relying on {, and } at the
# beginning of a line, to delineate the function begin and
# end.
#
# Assumptions: (applies only to the files being split, i.e. .cpp files)
# * Function definition bodies are terminated with } appearing at
# the beginning of a line.
# * Free-standing (outside of functions) macro invocations must be
# followed by a blank line, or terminated with a semicolon.
# * A function must not have a blank line between its header
# (signature) and its body.
# * There aren't multiple C-style comments on one line, with code
# between them.
# * typedefs are on a single line
# * A #endif doesn't have a multi-line C comment starting on that line.
# The first three lines above let this script run without specifying the
# full path to perl, as long as it is in the user's PATH.
# Taken from perlrun man page.
# Changes made by Andrew Gilpin (June - July 2000)
# * Added option -c to use .c extension instead of .cpp extension
# * Prints message when no filenames are specified on the command line
# * Changed -? option to -h so that it works properly in most shells
# * Added option -s to skip certain files, but copy them to $split_dir,
# renaming them. (filename.cpp -> $split_dir/filename_S1.cpp). This is
# here so that ACE can selectively not split certain files (namely those
# that this script doesn't work with :)
# * Added support for classes declared in the .cpp file.
$usage="usage: $0 [-h] [-d] [-v] [-c] [-s filename] filenames\n";
#### Configuration parameters.
$verbose = 0;
$debug = 0;
$split_dir = 'SPLIT';
$extension = 'cpp';
@files_to_skip = ();
#### Constants.
$DIR_SEPARATOR = $^O eq "MSWin32" ? '\\' : '/';
####
#### Process command line args.
####
while ( $#ARGV >= $[ && $ARGV[0] =~ /^-/ ) {
if ( $ARGV[0] eq '-d' ) {
$debug = 1;
} elsif ( $ARGV[0] eq '-v' ) {
$verbose = 1;
} elsif ( $ARGV[0] eq '-c' ) {
$extension = 'c';
} elsif ( $ARGV[0] eq '-s' ) {
push @files_to_skip, $ARGV[1];
shift;
} elsif ( $ARGV[0] eq '-h' ) {
print "$usage";
exit;
} else {
print STDERR "$0: unknown option $ARGV[0]\n";
die $usage;
}
shift;
}
&main ();
####
#### Reset state, to process a new file starting with a clean slate.
####
sub reset {
#### Working data buffers.
@intro = ();
@current_comments = ();
@current_code = ();
@if = ();
@save_if = ();
@endif = ();
@unknown = ();
####@unknown_s = ();
#### State variables.
$current_file_number = 0;
$top_of_file = 1;
$in_braces = 0;
$in_nonfunction_code = 0;
$in_C_comment = 0;
$intro_length = 0;
$preprocessor_continuation = 0;
$preserved_ifs = 0;
}
sub main {
#### Print error message if no files are specified.
#### We need to do this before we modify anything on disk.
die "No files specified!\n$usage" if (@ARGV == 0);
#### Remove the destination subdirectory, if it exists.
#### Attempts to clean it out using unlink may fail because
#### it can have many files.
if (-d "$split_dir") {
system ("/bin/rm -r $split_dir") << 256 &&
die "$0: unable to rm \"$split_dir\"\n";
}
#### Create the destination subdirectory.
mkdir "$split_dir", 0755 ||
die "$0: unable to create $split_dir directory: $!\n";
MAIN_LOOP: foreach $file (@ARGV) {
#### Strip off filename extension.
($basename = $file) =~ s/\.[^\.]+$//;
foreach $skip_file (@files_to_skip) {
if ($skip_file eq $file) {
system ("/bin/cp $file $split_dir/" . $basename. "_S1\.$extension");
next MAIN_LOOP;
}
}
&reset ();
print "FILE: $file\n" if $verbose;
open INPUT, "$file" || die "$0: unable to open \"$file\"\n";
while (<INPUT>) {
#### Strip comments from $line and use that for processing.
#### But, use $_ for output, so that comments will be preserved.
my $line = $_;
#### If we're in the midst of a multiline C comment, see
#### if it's finished on this line.
if ($in_C_comment) {
if ($line =~ s%^.*\*/%%) {
#### End C-style comment.
$in_C_comment = 0;
if ($line =~ /^\s*$/ && ! $in_braces) {
#### No code on the line.
#&save_comment ($_);
next;
}
} else {
unless ($in_braces) {
#&save_comment ($_);
next;
}
}
}
#### Strip C++-style comments.
if ($line =~ s%\s*//.*$%%) {
if ($line =~ /^\s*$/ && ! $in_braces) {
#### C++-style comment, without any code on the line.
#&save_comment ($_);
next;
}
}
#### And C-style comments.
if ($line =~ m%/\*%) {
#### Begin C-style comment. Strip any complete comment(s),
#### then see what's left.
$line =~ s%\s*/\*.*\*/\s*%%g;
#### check to see if a preprocessor is on this line
if (! $in_braces) {
if ($line eq '') {
#### The line just had comment(s). Save it.
#&save_comment ($_);
next;
} else {
#### There's other text on the line. See if it's just the
#### start of a comment.
if ($line =~ m%/\*% && $line !~ m%\*/%) {
#### The C-style comment isn't terminated on this line.
$in_C_comment = 1;
#&save_comment ($_);
next;
}
}
}
}
#### For now, skip ACE_RCSID's. Eventually, we might want to
#### consider putting them in _every_ file, if they're enabled.
next if $line =~ /^ACE_RCSID/;
if ($in_braces) {
push @unknown, $_;
if ($line =~ /{/) {
++$in_braces;
} elsif ($line =~ /^};/) {
#### }; at beginning of line could signify end of class
--$in_braces;
if ($in_braces == 0) {
push @intro, @unknown;
@unknown = ();
}
} elsif ($line =~ /^}/) {
#### } at beginning of line signifies end of function.
--$in_braces;
push @current_code, @unknown;
@unknown = ();
&finish_current ($basename, ++$current_file_number);
} elsif ($line =~ /};/) {
#### end of multi-line data delcaration
--$in_braces;
if ($in_braces == 0) {
push @current_code, @unknown;
@unknown = ();
&finish_current ($basename, ++$current_file_number);
}
}
} else {
#### Not in braces.
if (($line =~ m%[^/]*{%) && (! $preprocessor_continuation)) {
#### { signifies beginning of braces (obviously :).
if ($line =~ /};/) {
#### braces end on this line
push @unknown, $_;
push @current_code, @unknown;
@unknown = ();
&finish_current ($basename, ++$current_file_number);
} else {
push @unknown, $_;
$in_braces = 1;
$in_nonfunction_code = $top_of_file = 0;
}
} elsif ($line =~ /^}/) {
warn "$0: skipping unexpected } on line $. of \"$file\"\n";
next;
} elsif ($line =~ /^typedef/) {
push @intro, $_;
} elsif ($line =~ /^\s*#/ || $preprocessor_continuation) {
#### Preprocessor directive.
if ($in_nonfunction_code) {
push @unknown, $_;
} else {
push @intro, $_;
}
$top_of_file = 0;
$preprocessor_continuation = /\\$/ ? 1 : 0;
if ($line =~ m%^\s*#\s*if\s*(.*)(/.*)*$%) {
push @save_if, $_;
unshift @endif, "#endif /* $1 [Added by split-cpp.] */\n";
} elsif ($line =~ /^\s*#\s*endif/) {
#### End an #if/#else block.
unless (defined pop @save_if) {
pop @if;
if ($preserved_ifs > 0) {
--$preserved_ifs;
}
}
shift @endif;
#### } elsif ($line =~ /^\s*#/) {
#### Any other preprocessor directive.
}
} elsif ($line =~ /^\s*$/) {
#### Whitespace only, or empty line..
push @current_code, "\n";
if ($in_nonfunction_code) {
#### In the midst of non-function code, we reached a
#### blank line. Assume that we're done with it.
&finish_current ($basename, ++$current_file_number);
} else {
#### Not in a function, so add to intro. Just in case data or
#### a function follow it, flush now.
$preserved_ifs += $#save_if + 1;
&flush_current (\@intro);
}
} elsif ($line =~ /;/) {
#### Data definition or semicolon-terminated macro invocation.
push @unknown, $_;
$top_of_file = 0;
#### Is it file-static? Squash newlines out of @current_code.
my $statement = join (' ', @current_code);
if ($statement =~ /([^=[(]+)[=[(](.*)/) {
if ($1 =~ /static/) {
#### Move code to the intro.
push @intro, @current_comments;
@current_comments = ();
&flush_current (\@intro);
#### Not separate code.
$in_nonfunction_code = 0;
#### ???? Extract name from the left side and save for
#### later matching.
} else {
if ($statement =~ /^USEUNIT\s*\(/) {
#### Special-case those Borland USEUNIT things.
&flush_current (\@intro);
} else {
#### Non-static entity, with semicolon. Wrap it up.
push @current_code, @unknown;
@unknown = ();
&finish_current ($basename, ++$current_file_number);
}
}
} else {
#### Dunno. Wrap it up, anyways.
push @current_code, @unknown;
@unknown = ();
&finish_current ($basename, ++$current_file_number);
}
} else {
#### Beginning of data definition or function or class.
push @unknown, $_;
$in_nonfunction_code = 1;
$top_of_file = 0;
}
}
if (eof) {
close (ARGV); #### To reset line number counter.
if ($#intro > $intro_length) {
#### Leftover prepreprocessor statement(s), such as #pragma
#### instantiate.
&finish_current ($basename, ++$current_file_number);
}
}
}
close INPUT;
}
};
####
#### Save a comment in the appropriate array.
####
#sub save_comment {
# my ($comment) = @_;
#
# if ($top_of_file) {
# push @intro, $comment;
# } else {
# push @current_comments, $comment;
# }
#}
####
#### Flush the contents of the @current_code array to the destination
#### argument array. It is passed by reference.
####
sub flush_current {
my ($destination) = @_;
push @$destination, @current_code;
@current_code = ();
}
####
#### Flush what we've got now to an output (split) file.
####
sub finish_current {
my ($basename, $current_file_number) = @_;
my $current_file_name =
sprintf "$split_dir$DIR_SEPARATOR${basename}_S%d.$extension",
$current_file_number++;
if ($verbose) {
print "CURRENT OUTPUT FILE: $current_file_name\n";
print "INTRO:\n";
print @intro;
print @if;
print @current_comments;
print "CURRENT CODE:\n";
print @current_code;
print @endif;
}
open OUTPUT, "> $current_file_name" ||
die "unable to open $current_file_name\n";
print OUTPUT "// Automatically generated by ACE's split-cpp.\n" .
"// DO NOT EDIT!\n\n";
if ($debug) {
print OUTPUT "INTRO:\n", @intro, "IF:\n", @if,
"COMMENTS:\n", @current_comments,
"CURRENT:\n", @current_code, "ENDIF:\n", @endif;
} else {
print OUTPUT @intro, @if, @current_comments, @current_code, @endif;
}
close OUTPUT;
#### For detection of leftover preprocessor statements and
#### comments at end of file.
$intro_length = $#intro;
@current_comments = @current_code = @save_if = ();
$in_braces = $in_nonfunction_code = 0;
}
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