git.distorted.org.uk Git - u/mdw/catacomb/blob - ec-gentab.awk

   1 #! /usr/bin/awk -f
   2 #
   3 # $Id: ec-gentab.awk,v 1.1 2004/04/01 21:28:41 mdw Exp $
   4
   5 function banner(name,  s, i)
   6 {
   7   s = "/*----- " name " ";
   8   while (length(s) < 75) s = s "-";
   9   return (s "*/");
  10 }
  11
  12 function fix(name)
  13 {
  14   gsub(/[^0-9A-Za-z_]+/, "_", name);
  15   return (name);
  16 }
  17
  18 BEGIN {
  19   print "/* -*-c-*-";
  20   print " *";
  21   print " * Table of elliptic curves [generated]";
  22   print " */";
  23   print "";
  24   print "#include \"ectab.h\"";
  25   print "";
  26   print "#define N(x) (sizeof(x)/sizeof(*x))";
  27   print "#define MP(x) { x, x + N(x), N(x), 0, MP_CONST, 0 }";
  28   print "#define NOMP { 0, 0, 0, 0, 0 }";
  29   print "";
  30   print banner("Curve data");
  31   print "";
  32
  33   d_i = 0;
  34   name = "";
  35 }
  36
  37 function putmp(x,  d)
  38 {
  39   if (!(x in data)) {
  40     print "curve " name ": missing " x >"/dev/stderr";
  41     exit 1;
  42   }
  43   d = data[x];
  44   if (!(d in cache)) {
  45     n = "c_" fix(name) "_" x;
  46     print "static mpw " n "[] = {";
  47     system("./mpdump " d);
  48     print "};";
  49     print "";
  50     cache[d] = n;
  51   }
  52   mp[x] = cache[d];
  53 }
  54
  55 function flush()
  56 {
  57   if (name == "") return;
  58   print "/* --- Curve " name " --- */";
  59   delete mp;
  60   print "";
  61   putmp("p");
  62   if (type == "binnorm") putmp("beta");
  63   putmp("a");
  64   putmp("b");
  65   putmp("r");
  66   putmp("h");
  67   putmp("gx");
  68   putmp("gy");
  69   print "static ecdata c_" fix(name) " = {";
  70   print "  FTAG_" toupper(type) ",";
  71   print "  MP(" mp["p"] "),"
  72   if (type == "binnorm")
  73     print "  MP(" mp["beta"] "),";
  74   else
  75     print "  NOMP,";
  76   print "  MP(" mp["a"] "),"
  77   print "  MP(" mp["b"] "),"
  78   print "  MP(" mp["r"] "),"
  79   print "  MP(" mp["h"] "),"
  80   print "  MP(" mp["gx"] "),"
  81   print "  MP(" mp["gy"] ")"
  82   print "};";
  83   print "";
  84   dname[d_i++] = name;
  85   d[name] = name;
  86   r[name] = "c_" fix(name);
  87   name = "";
  88 }
  89
  90 /^[ \t]*(#|$)/ { next; }
  91
  92 $1 == "alias" { flush(); dname[d_i++] = $2; d[$2] = $3; next; }
  93
  94 $1 == "curve" { flush(); delete data; name = $2; type = $3; next; }
  95
  96 { data[$1] = $2; next; }
  97
  98 END {
  99   flush();
 100   print banner("Main table");
 101   print "";
 102   print "const ecentry ectab[] = {";
 103   for (i = 0; i < d_i; i++) {
 104     name = dname[i];
 105     rname = d[name];
 106     if (!rname in r) {
 107       print "curve " rname " not found (alias from " name ")" >"/dev/stderr";
 108       exit 1;
 109     }
 110     print "  { \"" name "\", &" r[rname] " },";
 111   }
 112   print "  { 0, 0 }";
 113   print "};"
 114   print "";
 115   print banner("That's all, folks");
 116 }