src/generate.pl

   1 #!/usr/bin/perl
   2 #
   3 #
   4 #
   5 use strict;
   6
   7 my $disclaimer = "Automatically generated - do not edit on penalty of futility!";
   8
   9
  10 # arguments
  11 my ($configfile, $out_h, $out_cpp, $types) = @ARGV;
  12
  13
  14 # open configuration file
  15 open(CFG, "$configfile") || die "$configfile: $!";
  16
  17 # open and load cssmtypes file
  18 open(TYPES, "$types") || die "$types: $!";
  19 $/=undef;
  20 my $types_h = <TYPES>;
  21 close(TYPES); $/="\n";
  22
  23 # open output files
  24 open(H, ">$out_h") || die "$out_h: $!";
  25 open(CPP, ">$out_cpp") || die "$out_cpp: $!";
  26
  27 # cautionary headings to each file
  28 print H <<EOH;
  29 //
  30 // Flipping bytes for securityd transition.
  31 // $disclaimer
  32 //
  33 EOH
  34
  35 print CPP <<EOC;
  36 //
  37 // Flipping bytes for securityd transition.
  38 // $disclaimer
  39 //
  40 EOC
  41
  42 # process generation instructions
  43 while (<CFG>) {
  44   chomp;
  45   next if /^[   ]*#/;
  46   next if /^[   ]*$/;
  47
  48   my @args = split;
  49   $_ = shift @args;
  50   my ($cssmName, @aliases) = split /\//;
  51
  52   print H "void flip($cssmName &obj);\n";
  53   for my $alias (@aliases) {
  54         print H "inline void flip($alias &obj) { flip(static_cast<$cssmName &>(obj)); }\n";
  55   }
  56
  57   next if ($args[0] eq 'CUSTOM');
  58
  59   if ($args[0] eq '*') {
  60         # extract definition from types file
  61         my ($list) = $types_h =~ /{\s+([^}]+)\s+}\s*$cssmName,/;
  62         die "cannot find struct definition for $cssmName in $types" unless $list;
  63         @args = $list =~ /([A-Za-z0-9_]+);/gm;
  64   }
  65
  66   print CPP "void flip($cssmName &obj)\n{\n";
  67   for my $field (@args) {
  68         print CPP "\tflip(obj.$field);\n";
  69   }
  70   print CPP "}\n\n";
  71 }