Table for driving key data extraction.

[u/mdw/catacomb] / mp-io.c

diff --git a/mp-io.c b/mp-io.c
index 0aa2bca..8e76917 100644 (file)
--- a/mp-io.c
+++ b/mp-io.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mp-io.c,v 1.1 1999/11/17 18:02:16 mdw Exp $
+ * $Id: mp-io.c,v 1.3 1999/11/21 22:13:02 mdw Exp $
  *
  * Loading and storing of multiprecision integers
  *
@@ -30,6 +30,12 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: mp-io.c,v $
+ * Revision 1.3  1999/11/21 22:13:02  mdw
+ * Add mp version of MPX_BITS.
+ *
+ * Revision 1.2  1999/11/19 13:19:06  mdw
+ * Set flags on results correctly.
+ *
  * Revision 1.1  1999/11/17 18:02:16  mdw
  * New multiprecision integer arithmetic suite.
  *
@@ -58,6 +64,23 @@ size_t mp_octets(const mp *m)
   return (sz);
 }
 
+/* --- @mp_bits@ --- *
+ *
+ * Arguments:  @const mp *m@ = a multiprecision integer
+ *
+ * Returns:    The number of bits required to represent @m@.
+ *
+ * Use:                Calculates the external storage required for a multiprecision
+ *             integer.
+ */
+
+unsigned long mp_bits(const mp *m)
+{
+  unsigned long bits;
+  MPX_BITS(bits, m->v, m->vl);
+  return (bits);
+}
+
 /* --- @mp_loadl@ --- *
  *
  * Arguments:  @mp *d@ = destination
@@ -76,6 +99,7 @@ mp *mp_loadl(mp *d, const void *pv, size_t sz)
 {
   MP_MODIFY(d, MPW_RQ(sz));
   mpx_loadl(d->v, d->vl, pv, sz);
+  d->f &= ~(MP_UNDEF | MP_NEG);
   mp_shrink(d);
   return (d);
 }
@@ -120,6 +144,7 @@ mp *mp_loadb(mp *d, const void *pv, size_t sz)
 {
   MP_MODIFY(d, MPW_RQ(sz));
   mpx_loadb(d->v, d->vl, pv, sz);
+  d->f &= ~(MP_UNDEF | MP_NEG);
   mp_shrink(d);
   return (d);
 }