source4/script/mkproto.pl

   1 #!/usr/bin/perl
   2 # Simple script for generating prototypes for C functions
   3 # Written by Jelmer Vernooij
   4 # based on the original mkproto.sh by Andrew Tridgell
   5
   6 use strict;
   7
   8 # don't use warnings module as it is not portable enough
   9 # use warnings;
  10
  11 use Getopt::Long;
  12 use File::Basename;
  13 use File::Path;
  14
  15 #####################################################################
  16 # read a file into a string
  17
  18 my $public_file = undef;
  19 my $private_file = undef;
  20 my $all_file = undef;
  21 my $public_define = undef;
  22 my $private_define = undef;
  23 my $_public = "";
  24 my $_private = "";
  25 my $public_data = \$_public;
  26 my $private_data = \$_private;
  27 my $builddir = ".";
  28 my $srcdir = ".";
  29
  30 sub public($)
  31 {
  32         my ($d) = @_;
  33         $$public_data .= $d;
  34 }
  35
  36 sub private($)
  37 {
  38         my ($d) = @_;
  39         $$private_data .= $d;
  40 }
  41
  42 sub usage()
  43 {
  44         print "Usage: mkproto.pl [options] [c files]\n";
  45         print "OPTIONS:\n";
  46         print "  --public=FILE          Write prototypes for public functions to FILE\n";
  47         print "  --private=FILE         Write prototypes for private functions to FILE\n";
  48         print "  --define=DEF           Use DEF to check whether header was already included\n";
  49         print "  --public-define=DEF    Same as --define, but just for public header\n";
  50         print "  --private-define=DEF   Same as --define, but just for private header\n";
  51         print "  --srcdir=path          Read files relative to this directory\n";
  52         print "  --builddir=path        Write file relative to this directory\n";
  53         print "  --help                 Print this help message\n\n";
  54         exit 0;
  55 }
  56
  57 GetOptions(
  58         'public=s' => sub { my ($f,$v) = @_; $public_file = $v; },
  59         'all=s' => sub { my ($f,$v) = @_; $public_file = $v; $private_file = $v; },
  60         'private=s' => sub { my ($f,$v) = @_; $private_file = $v; },
  61         'define=s' => sub {
  62                 my ($f,$v) = @_;
  63                 $public_define = $v;
  64                 $private_define = "$v\_PRIVATE";
  65         },
  66         'public-define=s' => \$public_define,
  67         'private-define=s' => \$private_define,
  68         'srcdir=s' => sub { my ($f,$v) = @_; $srcdir = $v; },
  69         'builddir=s' => sub { my ($f,$v) = @_; $builddir = $v; },
  70         'help' => \&usage
  71 ) or exit(1);
  72
  73 sub normalize_define($$)
  74 {
  75         my ($define, $file) = @_;
  76
  77         if (not defined($define) and defined($file)) {
  78                 $define = "__" . uc($file) . "__";
  79                 $define =~ tr{./}{__};
  80                 $define =~ tr{\-}{_};
  81         } elsif (not defined($define)) {
  82                 $define = '_PROTO_H_';
  83         }
  84
  85         return $define;
  86 }
  87
  88 $public_define = normalize_define($public_define, $public_file);
  89 $private_define = normalize_define($private_define, $private_file);
  90
  91 if ((defined($private_file) and defined($public_file) and ($private_file eq $public_file)) or
  92         (not defined($private_file) and not defined($public_file))) {
  93         $private_data = $public_data;
  94 }
  95
  96 sub file_load($)
  97 {
  98     my($filename) = @_;
  99     local(*INPUTFILE);
 100     open(INPUTFILE, $filename) or return undef;
 101     my($saved_delim) = $/;
 102     undef $/;
 103     my($data) = <INPUTFILE>;
 104     close(INPUTFILE);
 105     $/ = $saved_delim;
 106     return $data;
 107 }
 108
 109 sub print_header($$)
 110 {
 111         my ($file, $header_name) = @_;
 112         $file->("#ifndef $header_name\n");
 113         $file->("#define $header_name\n\n");
 114         $file->("#undef _PRINTF_ATTRIBUTE\n");
 115         $file->("#define _PRINTF_ATTRIBUTE(a1, a2) PRINTF_ATTRIBUTE(a1, a2)\n");
 116         $file->("/* This file was automatically generated by mkproto.pl. DO NOT EDIT */\n\n");
 117 }
 118
 119 sub print_footer($$)
 120 {
 121         my ($file, $header_name) = @_;
 122         $file->("#undef _PRINTF_ATTRIBUTE\n");
 123         $file->("#define _PRINTF_ATTRIBUTE(a1, a2)\n");
 124         $file->("\n#endif /* $header_name */\n\n");
 125 }
 126
 127 sub process_file($$$)
 128 {
 129         my ($public_file, $private_file, $filename) = @_;
 130
 131         $filename =~ s/\.o$/\.c/g;
 132
 133         if ($filename =~ /^\//) {
 134                 open(FH, "<$filename") or die("Failed to open $filename");
 135         } elsif (!open(FH, "< $builddir/$filename")) {
 136             open(FH, "< $srcdir/$filename") || die "Failed to open $filename";
 137         }
 138
 139         $private_file->("\n/* The following definitions come from $filename  */\n\n");
 140
 141         my $comment = undef;
 142         my $incomment = 0;
 143         while (my $line = <FH>) {
 144                 my $target = \&private;
 145                 my $is_public = 0;
 146
 147                 if ($line =~ /^\/\*\*/) {
 148                         $comment = "";
 149                         $incomment = 1;
 150                 }
 151
 152                 if ($incomment) {
 153                         $comment .= $line;
 154                         if ($line =~ /\*\//) {
 155                                 $incomment = 0;
 156                         }
 157                 }
 158
 159                 # these are ordered for maximum speed
 160                 next if ($line =~ /^\s/);
 161
 162                 next unless ($line =~ /\(/);
 163
 164                 next if ($line =~ /^\/|[;]/);
 165
 166                 if ($line =~ /^FN_/) {
 167                         next;
 168                 }
 169
 170                 if ($line =~ /^_PUBLIC_[\t ]/) {
 171                         $target = \&public;
 172                         $is_public = 1;
 173                 }
 174
 175                 next unless ( $is_public || $line =~ /
 176                               ^(_DEPRECATED_ |_NORETURN_ |_WARN_UNUSED_RESULT_ |_PURE_ )*(
 177                                   void|bool|int|struct|char|const|\w+_[tT]\s|uint|unsigned|long|NTSTATUS|
 178                                   ADS_STATUS|enum\s.*\(|DATA_BLOB|WERROR|XFILE|FILE|DIR|
 179                               double|TDB_CONTEXT|TDB_DATA|TALLOC_CTX|NTTIME|FN_|init_module|
 180                               GtkWidget|GType|smb_ucs2_t|krb5_error_code|NET_API_STATUS)
 181                               /xo);
 182
 183                 next if ($line =~ /^int\s*main/);
 184
 185                 $target->("\n$comment") if (defined($comment)); $comment = undef;
 186
 187                 if ( $line =~ /\(.*\)\s*$/o ) {
 188                         chomp $line;
 189                         $target->("$line;\n");
 190                         next;
 191                 }
 192
 193                 $target->($line);
 194
 195                 while ($line = <FH>) {
 196                         if ($line =~ /\)\s*$/o) {
 197                                 chomp $line;
 198                                 $target->("$line;\n");
 199                                 last;
 200                         }
 201                         $target->($line);
 202                 }
 203         }
 204
 205         close(FH);
 206 }
 207
 208
 209 print_header(\&public, $public_define);
 210 if (defined($private_file) and defined($public_file) and $public_file ne $private_file) {
 211         print_header(\&private, $private_define);
 212
 213         private("/* this file contains prototypes for functions that " .
 214                         "are private \n * to this subsystem or library. These functions " .
 215                         "should not be \n * used outside this particular subsystem! */\n\n");
 216
 217         public("/* this file contains prototypes for functions that " .
 218                         "are part of \n * the public API of this subsystem or library. */\n\n");
 219
 220 }
 221
 222 public("#ifndef _PUBLIC_\n#define _PUBLIC_\n#endif\n\n");
 223 public("#ifndef _PURE_\n#define _PURE_\n#endif\n\n");
 224 public("#ifndef _NORETURN_\n#define _NORETURN_\n#endif\n\n");
 225 public("#ifndef _DEPRECATED_\n#define _DEPRECATED_\n#endif\n\n");
 226 public("#ifndef _WARN_UNUSED_RESULT_\n#define _WARN_UNUSED_RESULT_\n#endif\n\n");
 227
 228 process_file(\&public, \&private, $_) foreach (@ARGV);
 229 print_footer(\&public, $public_define);
 230 if (defined($private_file) and $public_file ne $private_file) {
 231         print_footer(\&private, $private_define);
 232 }
 233
 234 if (not defined($public_file)) {
 235         print STDOUT $$public_data;
 236 }
 237
 238 if (not defined($private_file) and defined($public_file)) {
 239         print STDOUT $$private_data;
 240 }
 241
 242 mkpath(dirname($public_file), 0, 0755);
 243 open(PUBLIC, ">$public_file") or die("Can't open `$public_file': $!");
 244 print PUBLIC "$$public_data";
 245 close(PUBLIC);
 246
 247 if (defined($private_file) and $public_file ne $private_file) {
 248         mkpath(dirname($private_file), 0, 0755);
 249         open(PRIVATE, ">$private_file") or die("Can't open `$private_file': $!");
 250         print PRIVATE "$$private_data";
 251         close(PRIVATE);
 252 }