Standard curves and curve checking.

[u/mdw/catacomb] / mpdump.c

diff --git a/mpdump.c b/mpdump.c
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+++ b/mpdump.c
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+/* -*-c-*-
+ *
+ * $Id: mpdump.c,v 1.1 2004/03/27 17:54:11 mdw Exp $
+ *
+ * Dump a multiprecision integer as C data
+ *
+ * (c) 2004 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------* 
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ * 
+ * Catacomb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------* 
+ *
+ * $Log: mpdump.c,v $
+ * Revision 1.1  2004/03/27 17:54:11  mdw
+ * Standard curves and curve checking.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "mp.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+int main(int argc, char *argv[])
+{
+  mp *x;
+  int i;
+  int w, n;
+
+  if (argc != 2) {
+    fprintf(stderr, "%s: missing argument\n", argv[0]);
+    return (1);
+  }
+  if ((x = mp_readstring(0, argv[1], 0, 0)) == 0) {
+    fprintf(stderr, "%s: bad integer `%s'", argv[0], argv[1]);
+    return (1);
+  }
+  fputs("  ", stdout);
+  w = (MPW_BITS + 3)/4;
+  n = 1;
+  while (2 + 2 * n * (4 + w) < 72) n <<= 1;
+  i = 0;
+  for (;;) {
+    printf("0x%0*x", w, x->v[i]);
+    i++;
+    if (i >= MP_LEN(x)) break;
+    fputs(",", stdout);
+    if (i % n) fputs(" ", stdout); else fputs("\n  ", stdout);
+  }
+  if (fflush(stdout) || ferror(stdout)) {
+    fprintf(stderr, "%s: error writing data: %s", argv[0], strerror(errno));
+    return (1);
+  }
+  fputs("\n", stdout);
+  return (0);
+}
+
+/*----- That's all, folks -------------------------------------------------*/