com32/lib/makeerrlist.pl

   1 #!/usr/bin/perl
   2 #
   3 # This creates sys_errlist from <asm/errno.h> through somewhat
   4 # heuristic matching.  It presumes the relevant entries are of the form
   5 # #define Exxxx <integer> /* comment */
   6 #
   7
   8 use FileHandle;
   9
  10 %errors  = ();
  11 %errmsg  = ();
  12 $maxerr  = -1;
  13 @includelist = ();              # Include directories
  14
  15 sub parse_file($) {
  16     my($file) = @_;
  17     my($fh) = new FileHandle;
  18     my($line, $error, $msg);
  19     my($kernelonly) = 0;
  20     my($root);
  21
  22     print STDERR "opening $file\n" unless ( $quiet );
  23
  24     $ok = 0;
  25     foreach $root ( @includelist ) {
  26         if ( $fh->open($root.'//'.$file, '<') ) {
  27             $ok = 1;
  28             last;
  29         }
  30     }
  31
  32     if ( ! $ok ) {
  33         die "$0: Cannot find file $file\n";
  34     }
  35
  36     while ( defined($line = <$fh>) ) {
  37         if ( $kernelonly ) {
  38             if ( $line =~ /^\#\s*endif/ ) {
  39                 $kernelonly--;
  40             } elsif ( $line =~ /^\#\sif/ ) {
  41                 $kernelonly++;
  42             }
  43         } else {
  44             if ( $line =~ /^\#\s*define\s+([A-Z0-9_]+)\s+([0-9]+)\s*\/\*\s*(.*\S)\s*\*\// ) {
  45                 $error = $1;
  46                 $errno = $2+0;
  47                 $msg   = $3;
  48                 print STDERR "$error ($errno) => \"$msg\"\n" unless ( $quiet );
  49                 $errors{$errno} = $error;
  50                 $errmsg{$errno} = $msg;
  51                 $maxerr = $errno if ( $errno > $maxerr );
  52             } elsif ( $line =~ /^\#\s*include\s+[\<\"](.*)[\>\"]/ ) {
  53                 parse_file($1);
  54             } elsif ( $line =~ /^\#\s*ifdef\s+__KERNEL__/ ) {
  55                 $kernelonly++;
  56             }
  57         }
  58     }
  59     close($fh);
  60     print STDERR "closing $file\n" unless ( $quiet );
  61 }
  62
  63 $v = $ENV{'KBUILD_VERBOSE'};
  64 $quiet = defined($v) ? !$v : 0;
  65
  66 foreach $arg ( @ARGV ) {
  67     if ( $arg eq '-q' ) {
  68         $quiet = 1;
  69     } elsif ( $arg =~ /^-(errlist|errnos|maxerr)$/ ) {
  70         $type = $arg;
  71     } elsif ( $arg =~ '^\-I' ) {
  72         push(@includelist, "$'");
  73     } else {
  74         # Ignore
  75     }
  76 }
  77
  78 parse_file('errno.h');
  79
  80 if ( $type eq '-errlist' ) {
  81     print  "#include <errno.h>\n";
  82     printf "const int sys_nerr = %d;\n", $maxerr+1;
  83     printf "const char * const sys_errlist[%d] = {\n", $maxerr+1;
  84     foreach $e ( sort(keys(%errors)) ) {
  85         printf "  [%s] = \"%s\",\n", $errors{$e}, $errmsg{$e};
  86     }
  87     print "};\n";
  88 } elsif ( $type eq '-errnos' ) {
  89     print  "#include <errno.h>\n";
  90     printf "const int sys_nerr = %d;\n", $maxerr+1;
  91     printf "const char * const sys_errlist[%d] = {\n", $maxerr+1;
  92     foreach $e ( sort(keys(%errors)) ) {
  93         printf "  [%s] = \"%s\",\n", $errors{$e}, $errors{$e};
  94     }
  95     print "};\n";
  96 } elsif ( $type eq '-maxerr' ) {
  97     print $maxerr, "\n";
  98 }