#!/home/centos/perldoc-browser/perls/5.6.2/bin/perl eval 'exec /home/centos/perldoc-browser/perls/5.6.2/bin/perl -S $0 ${1+"$@"}' if $running_under_some_shell; use strict; use Config; use File::Path qw(mkpath); use Getopt::Std; getopts('Dd:rlhaQ'); use vars qw($opt_D $opt_d $opt_r $opt_l $opt_h $opt_a $opt_Q); die "-r and -a options are mutually exclusive\n" if ($opt_r and $opt_a); my @inc_dirs = inc_dirs() if $opt_a; my $Exit = 0; my $Dest_dir = $opt_d || $Config{installsitearch}; die "Destination directory $Dest_dir doesn't exist or isn't a directory\n" unless -d $Dest_dir; my @isatype = split(' ',<-"); } else { ($outfile = $file) =~ s/\.h$/.ph/ || next; print "$file -> $outfile\n" unless $opt_Q; if ($file =~ m|^(.*)/|) { $dir = $1; mkpath "$Dest_dir/$dir"; } if ($opt_a) { # automagic mode: locate header file in @inc_dirs foreach (@inc_dirs) { chdir $_; last if -f $file; } } open(IN,"$file") || (($Exit = 1),(warn "Can't open $file: $!\n"),next); open(OUT,">$Dest_dir/$outfile") || die "Can't create $outfile: $!\n"; } print OUT "require '_h2ph_pre.ph';\n\n"; while () { chop; while (/\\$/) { chop; $_ .= ; chop; } print OUT "# $_\n" if $opt_D; if (s:/\*:\200:g) { s:\*/:\201:g; s/\200[^\201]*\201//g; # delete single line comments if (s/\200.*//) { # begin multi-line comment? $_ .= '/*'; $_ .= ; redo; } } if (s/^\s*\#\s*//) { if (s/^define\s+(\w+)//) { $name = $1; $new = ''; s/\s+$//; if (s/^\(([\w,\s]*)\)//) { $args = $1; my $proto = '() '; if ($args ne '') { $proto = ''; foreach my $arg (split(/,\s*/,$args)) { $arg =~ s/^\s*([^\s].*[^\s])\s*$/$1/; $curargs{$arg} = 1; } $args =~ s/\b(\w)/\$$1/g; $args = "local($args) = \@_;\n$t "; } s/^\s+//; expr(); $new =~ s/(["\\])/\\$1/g; #"]); $new = reindent($new); $args = reindent($args); if ($t ne '') { $new =~ s/(['\\])/\\$1/g; #']); if ($opt_h) { print OUT $t, "eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name $proto\{\n$t ${args}eval q($new);\n$t}' unless defined(\&$name);\n"; $eval_index++; } else { print OUT $t, "eval 'sub $name $proto\{\n$t ${args}eval q($new);\n$t}' unless defined(\&$name);\n"; } } else { print OUT "unless(defined(\&$name)) {\n sub $name $proto\{\n\t${args}eval q($new);\n }\n}\n"; } %curargs = (); } else { s/^\s+//; expr(); $new = 1 if $new eq ''; $new = reindent($new); $args = reindent($args); if ($t ne '') { $new =~ s/(['\\])/\\$1/g; #']); if ($opt_h) { print OUT $t,"eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name () {",$new,";}' unless defined(\&$name);\n"; $eval_index++; } else { print OUT $t,"eval 'sub $name () {",$new,";}' unless defined(\&$name);\n"; } } else { # Shunt around such directives as `#define FOO FOO': next if " \&$name" eq $new; print OUT $t,"unless(defined(\&$name)) {\n sub $name () {\t",$new,";}\n}\n"; } } } elsif (/^(include|import)\s*[<"](.*)[>"]/) { ($incl = $2) =~ s/\.h$/.ph/; print OUT $t,"require '$incl';\n"; } elsif(/^include_next\s*[<"](.*)[>"]/) { ($incl = $1) =~ s/\.h$/.ph/; print OUT ($t, "eval {\n"); $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT ($t, "my(\%INCD) = map { \$INC{\$_} => 1 } ", "(grep { \$_ eq \"$incl\" } keys(\%INC));\n"); print OUT ($t, "my(\@REM) = map { \"\$_/$incl\" } ", "(grep { not exists(\$INCD{\"\$_/$incl\"})", "and -f \"\$_/$incl\" } \@INC);\n"); print OUT ($t, "require \"\$REM[0]\" if \@REM;\n"); $tab -= 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT ($t, "};\n"); print OUT ($t, "warn(\$\@) if \$\@;\n"); } elsif (/^ifdef\s+(\w+)/) { print OUT $t,"if(defined(&$1)) {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (/^ifndef\s+(\w+)/) { print OUT $t,"unless(defined(&$1)) {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (s/^if\s+//) { $new = ''; $inif = 1; expr(); $inif = 0; print OUT $t,"if($new) {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (s/^elif\s+//) { $new = ''; $inif = 1; expr(); $inif = 0; $tab -= 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT $t,"}\n elsif($new) {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (/^else/) { $tab -= 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT $t,"} else {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (/^endif/) { $tab -= 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT $t,"}\n"; } elsif(/^undef\s+(\w+)/) { print OUT $t, "undef(&$1) if defined(&$1);\n"; } elsif(/^error\s+(".*")/) { print OUT $t, "die($1);\n"; } elsif(/^error\s+(.*)/) { print OUT $t, "die(\"", quotemeta($1), "\");\n"; } elsif(/^warning\s+(.*)/) { print OUT $t, "warn(\"", quotemeta($1), "\");\n"; } elsif(/^ident\s+(.*)/) { print OUT $t, "# $1\n"; } } elsif(/^\s*(typedef\s*)?enum\s*(\s+[a-zA-Z_]\w*\s*)?\{/) { until(/\}.*?;/) { chomp($next = ); $_ .= $next; print OUT "# $next\n" if $opt_D; } s@/\*.*?\*/@@g; s/\s+/ /g; /^\s?(typedef\s?)?enum\s?([a-zA-Z_]\w*)?\s?\{(.*)\}\s?([a-zA-Z_]\w*)?\s?;/; (my $enum_subs = $3) =~ s/\s//g; my @enum_subs = split(/,/, $enum_subs); my $enum_val = -1; foreach my $enum (@enum_subs) { my ($enum_name, $enum_value) = $enum =~ /^([a-zA-Z_]\w*)(=.+)?$/; $enum_value =~ s/^=//; $enum_val = (length($enum_value) ? $enum_value : $enum_val + 1); if ($opt_h) { print OUT ($t, "eval(\"\\n#line $eval_index $outfile\\n", "sub $enum_name () \{ $enum_val; \}\") ", "unless defined(\&$enum_name);\n"); ++ $eval_index; } else { print OUT ($t, "eval(\"sub $enum_name () \{ $enum_val; \}\") ", "unless defined(\&$enum_name);\n"); } } } } print OUT "1;\n"; $Is_converted{$file} = 1; queue_includes_from($file) if ($opt_a); } exit $Exit; sub reindent($) { my($text) = shift; $text =~ s/\n/\n /g; $text =~ s/ /\t/g; $text; } sub expr { my $joined_args; if(keys(%curargs)) { $joined_args = join('|', keys(%curargs)); } while ($_ ne '') { s/^\&\&// && do { $new .= " &&"; next;}; # handle && operator s/^\&([\(a-z\)]+)/$1/i; # hack for things that take the address of s/^(\s+)// && do {$new .= ' '; next;}; s/^(0X[0-9A-F]+)[UL]*//i && do {$new .= lc($1); next;}; s/^(-?\d+\.\d+E[-+]\d+)F?//i && do {$new .= $1; next;}; s/^(\d+)\s*[LU]*//i && do {$new .= $1; next;}; s/^("(\\"|[^"])*")// && do {$new .= $1; next;}; s/^'((\\"|[^"])*)'// && do { if ($curargs{$1}) { $new .= "ord('\$$1')"; } else { $new .= "ord('$1')"; } next; }; # replace "sizeof(foo)" with "{foo}" # also, remove * (C dereference operator) to avoid perl syntax # problems. Where the %sizeof array comes from is anyone's # guess (c2ph?), but this at least avoids fatal syntax errors. # Behavior is undefined if sizeof() delimiters are unbalanced. # This code was modified to able to handle constructs like this: # sizeof(*(p)), which appear in the HP-UX 10.01 header files. s/^sizeof\s*\(// && do { $new .= '$sizeof'; my $lvl = 1; # already saw one open paren # tack { on the front, and skip it in the loop $_ = "{" . "$_"; my $index = 1; # find balanced closing paren while ($index <= length($_) && $lvl > 0) { $lvl++ if substr($_, $index, 1) eq "("; $lvl-- if substr($_, $index, 1) eq ")"; $index++; } # tack } on the end, replacing ) substr($_, $index - 1, 1) = "}"; # remove pesky * operators within the sizeof argument substr($_, 0, $index - 1) =~ s/\*//g; next; }; # Eliminate typedefs /\(([\w\s]+)[\*\s]*\)\s*[\w\(]/ && do { foreach (split /\s+/, $1) { # Make sure all the words are types, last unless ($isatype{$_} or $_ eq 'struct'); } s/\([\w\s]+[\*\s]*\)// && next; # then eliminate them. }; # struct/union member, including arrays: s/^([_A-Z]\w*(\[[^\]]+\])?((\.|->)[_A-Z]\w*(\[[^\]]+\])?)+)//i && do { my $id = $1; $id =~ s/(\.|(->))([^\.\-]*)/->\{$3\}/g; $id =~ s/\b([^\$])($joined_args)/$1\$$2/g if length($joined_args); while($id =~ /\[\s*([^\$\&\d\]]+)\]/) { my($index) = $1; $index =~ s/\s//g; if(exists($curargs{$index})) { $index = "\$$index"; } else { $index = "&$index"; } $id =~ s/\[\s*([^\$\&\d\]]+)\]/[$index]/; } $new .= " (\$$id)"; }; s/^([_a-zA-Z]\w*)// && do { my $id = $1; if ($id eq 'struct') { s/^\s+(\w+)//; $id .= ' ' . $1; $isatype{$id} = 1; } elsif ($id =~ /^((un)?signed)|(long)|(short)$/) { while (s/^\s+(\w+)//) { $id .= ' ' . $1; } $isatype{$id} = 1; } if ($curargs{$id}) { $new .= "\$$id"; $new .= '->' if /^[\[\{]/; } elsif ($id eq 'defined') { $new .= 'defined'; } elsif (/^\(/) { s/^\((\w),/("$1",/ if $id =~ /^_IO[WR]*$/i; # cheat $new .= " &$id"; } elsif ($isatype{$id}) { if ($new =~ /{\s*$/) { $new .= "'$id'"; } elsif ($new =~ /\(\s*$/ && /^[\s*]*\)/) { $new =~ s/\(\s*$//; s/^[\s*]*\)//; } else { $new .= q(').$id.q('); } } else { if ($inif && $new !~ /defined\s*\($/) { $new .= '(defined(&' . $id . ') ? &' . $id . ' : 0)'; } elsif (/^\[/) { $new .= " \$$id"; } else { $new .= ' &' . $id; } } next; }; s/^(.)// && do { if ($1 ne '#') { $new .= $1; } next;}; } } # Handle recursive subdirectories without getting a grotesquely big stack. # Could this be implemented using File::Find? sub next_file { my $file; while (@ARGV) { $file = shift @ARGV; if ($file eq '-' or -f $file or -l $file) { return $file; } elsif (-d $file) { if ($opt_r) { expand_glob($file); } else { print STDERR "Skipping directory `$file'\n"; } } elsif ($opt_a) { return $file; } else { print STDERR "Skipping `$file': not a file or directory\n"; } } return undef; } # Put all the files in $directory into @ARGV for processing. sub expand_glob { my ($directory) = @_; $directory =~ s:/$::; opendir DIR, $directory; foreach (readdir DIR) { next if ($_ eq '.' or $_ eq '..'); # expand_glob() is going to be called until $ARGV[0] isn't a # directory; so push directories, and unshift everything else. if (-d "$directory/$_") { push @ARGV, "$directory/$_" } else { unshift @ARGV, "$directory/$_" } } closedir DIR; } # Given $file, a symbolic link to a directory in the C include directory, # make an equivalent symbolic link in $Dest_dir, if we can figure out how. # Otherwise, just duplicate the file or directory. sub link_if_possible { my ($dirlink) = @_; my $target = eval 'readlink($dirlink)'; if ($target =~ m:^\.\./: or $target =~ m:^/:) { # The target of a parent or absolute link could leave the $Dest_dir # hierarchy, so let's put all of the contents of $dirlink (actually, # the contents of $target) into @ARGV; as a side effect down the # line, $dirlink will get created as an _actual_ directory. expand_glob($dirlink); } else { if (-l "$Dest_dir/$dirlink") { unlink "$Dest_dir/$dirlink" or print STDERR "Could not remove link $Dest_dir/$dirlink: $!\n"; } if (eval 'symlink($target, "$Dest_dir/$dirlink")') { print "Linking $target -> $Dest_dir/$dirlink\n"; # Make sure that the link _links_ to something: if (! -e "$Dest_dir/$target") { mkpath("$Dest_dir/$target", 0755) or print STDERR "Could not create $Dest_dir/$target/\n"; } } else { print STDERR "Could not symlink $target -> $Dest_dir/$dirlink: $!\n"; } } } # Push all #included files in $file onto our stack, except for STDIN # and files we've already processed. sub queue_includes_from { my ($file) = @_; my $line; return if ($file eq "-"); open HEADER, $file or return; while (defined($line =
)) { while (/\\$/) { # Handle continuation lines chop $line; $line .=
; } if ($line =~ /^#\s*include\s+<(.*?)>/) { push(@ARGV, $1) unless $Is_converted{$1}; } } close HEADER; } # Determine include directories; $Config{usrinc} should be enough for (all # non-GCC?) C compilers, but gcc uses an additional include directory. sub inc_dirs { my $from_gcc = `$Config{cc} -v 2>&1`; $from_gcc =~ s:^Reading specs from (.*?)/specs\b.*:$1/include:s; length($from_gcc) ? ($from_gcc, $Config{usrinc}) : ($Config{usrinc}); } # Create "_h2ph_pre.ph", if it doesn't exist or was built by a different # version of h2ph. sub build_preamble_if_necessary { # Increment $VERSION every time this function is modified: my $VERSION = 2; my $preamble = "$Dest_dir/_h2ph_pre.ph"; # Can we skip building the preamble file? if (-r $preamble) { # Extract version number from first line of preamble: open PREAMBLE, $preamble or die "Cannot open $preamble: $!"; my $line = ; $line =~ /(\b\d+\b)/; close PREAMBLE or die "Cannot close $preamble: $!"; # Don't build preamble if a compatible preamble exists: return if $1 == $VERSION; } my (%define) = _extract_cc_defines(); open PREAMBLE, ">$preamble" or die "Cannot open $preamble: $!"; print PREAMBLE "# This file was created by h2ph version $VERSION\n"; foreach (sort keys %define) { if ($opt_D) { print PREAMBLE "# $_=$define{$_}\n"; } if ($define{$_} =~ /^\d+$/) { print PREAMBLE "unless (defined &$_) { sub $_() { $define{$_} } }\n\n"; } elsif ($define{$_} =~ /^\w+$/) { print PREAMBLE "unless (defined &$_) { sub $_() { &$define{$_} } }\n\n"; } else { print PREAMBLE "unless (defined &$_) { sub $_() { \"", quotemeta($define{$_}), "\" } }\n\n"; } } close PREAMBLE or die "Cannot close $preamble: $!"; } # %Config contains information on macros that are pre-defined by the # system's compiler. We need this information to make the .ph files # function with perl as the .h files do with cc. sub _extract_cc_defines { my %define; my $allsymbols = join " ", @Config{'ccsymbols', 'cppsymbols', 'cppccsymbols'}; # Split compiler pre-definitions into `key=value' pairs: foreach (split /\s+/, $allsymbols) { /(.+?)=(.+)/ and $define{$1} = $2; if ($opt_D) { print STDERR "$_: $1 -> $2\n"; } } return %define; } 1; ############################################################################## __END__ =head1 NAME h2ph - convert .h C header files to .ph Perl header files =head1 SYNOPSIS B =head1 DESCRIPTION I converts any C header files specified to the corresponding Perl header file format. It is most easily run while in /usr/include: cd /usr/include; h2ph * sys/* or cd /usr/include; h2ph -r -l . The output files are placed in the hierarchy rooted at Perl's architecture dependent library directory. You can specify a different hierarchy with a B<-d> switch. If run with no arguments, filters standard input to standard output. =head1 OPTIONS =over 4 =item -d destination_dir Put the resulting B<.ph> files beneath B, instead of beneath the default Perl library location (C<$Config{'installsitsearch'}>). =item -r Run recursively; if any of B are directories, then run I on all files in those directories (and their subdirectories, etc.). B<-r> and B<-a> are mutually exclusive. =item -a Run automagically; convert B, as well as any B<.h> files which they include. This option will search for B<.h> files in all directories which your C compiler ordinarily uses. B<-a> and B<-r> are mutually exclusive. =item -l Symbolic links will be replicated in the destination directory. If B<-l> is not specified, then links are skipped over. =item -h Put ``hints'' in the .ph files which will help in locating problems with I. In those cases when you B a B<.ph> file containing syntax errors, instead of the cryptic [ some error condition ] at (eval mmm) line nnn you will see the slightly more helpful [ some error condition ] at filename.ph line nnn However, the B<.ph> files almost double in size when built using B<-h>. =item -D Include the code from the B<.h> file as a comment in the B<.ph> file. This is primarily used for debugging I. =item -Q ``Quiet'' mode; don't print out the names of the files being converted. =back =head1 ENVIRONMENT No environment variables are used. =head1 FILES /usr/include/*.h /usr/include/sys/*.h etc. =head1 AUTHOR Larry Wall =head1 SEE ALSO perl(1) =head1 DIAGNOSTICS The usual warnings if it can't read or write the files involved. =head1 BUGS Doesn't construct the %sizeof array for you. It doesn't handle all C constructs, but it does attempt to isolate definitions inside evals so that you can get at the definitions that it can translate. It's only intended as a rough tool. You may need to dicker with the files produced. You have to run this program by hand; it's not run as part of the Perl installation. Doesn't handle complicated expressions built piecemeal, a la: enum { FIRST_VALUE, SECOND_VALUE, #ifdef ABC THIRD_VALUE #endif }; Doesn't necessarily locate all of your C compiler's internally-defined symbols. =cut