From 1a05a8ef4cf287194d595bc6749f6ed6585d3352 Mon Sep 17 00:00:00 2001
From: mdw <mdw>
Date: Sun, 8 Oct 2000 12:06:12 +0000
Subject: [PATCH] Provide @mpx_ueq@ for rapidly testing equality of two
 integers.

---
 mpx.c | 47 ++++++++++++++++++++++++++++++++++++-----------
 mpx.h | 18 +++++++++++++++++-
 2 files changed, 53 insertions(+), 12 deletions(-)

diff --git a/mpx.c b/mpx.c
index 327699c..13b6fa0 100644
--- a/mpx.c
+++ b/mpx.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mpx.c,v 1.9 2000/06/26 07:52:50 mdw Exp $
+ * $Id: mpx.c,v 1.10 2000/10/08 12:06:12 mdw Exp $
  *
  * Low-level multiprecision arithmetic
  *
@@ -30,6 +30,9 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: mpx.c,v $
+ * Revision 1.10  2000/10/08 12:06:12  mdw
+ * Provide @mpx_ueq@ for rapidly testing equality of two integers.
+ *
  * Revision 1.9  2000/06/26 07:52:50  mdw
  * Portability fix for the bug fix.
  *
@@ -423,6 +426,29 @@ void mpx_2c(mpw *dv, mpw *dvl, const mpw *v, const mpw *vl)
   MPX_UADDN(dv, dvl, 1);
 }
 
+/* --- @mpx_ueq@ --- *
+ *
+ * Arguments:	@const mpw *av, *avl@ = first argument vector base and limit
+ *		@const mpw *bv, *bvl@ = second argument vector base and limit
+ *
+ * Returns:	Nonzero if the two vectors are equal.
+ *
+ * Use:		Performs an unsigned integer test for equality.
+ */
+
+int mpx_ueq(const mpw *av, const mpw *avl, const mpw *bv, const mpw *bvl)
+{
+  MPX_SHRINK(av, avl);
+  MPX_SHRINK(bv, bvl);
+  if (avl - av != bvl - bv)
+    return (0);
+  while (av < avl) {
+    if (*av++ != *bv++)
+      return (0);
+  }
+  return (1);
+}
+
 /* --- @mpx_ucmp@ --- *
  *
  * Arguments:	@const mpw *av, *avl@ = first argument vector base and limit
@@ -453,7 +479,7 @@ int mpx_ucmp(const mpw *av, const mpw *avl, const mpw *bv, const mpw *bvl)
   }
   return (0);
 }
-  
+
 /* --- @mpx_uadd@ --- *
  *
  * Arguments:	@mpw *dv, *dvl@ = destination vector base and limit
@@ -1070,7 +1096,7 @@ static int lsl(dstr *v)
   ALLOC(d, dl, al - a + (n + MPW_BITS - 1) / MPW_BITS);
 
   mpx_lsl(d, dl, a, al, n);
-  if (MPX_UCMP(d, dl, !=, c, cl)) {
+  if (!mpx_ueq(d, dl, c, cl)) {
     fprintf(stderr, "\n*** lsl(%i) failed\n", n);
     dumpmp("       a", a, al);
     dumpmp("expected", c, cl);
@@ -1095,7 +1121,7 @@ static int lsr(dstr *v)
   ALLOC(d, dl, al - a + (n + MPW_BITS - 1) / MPW_BITS + 1);
 
   mpx_lsr(d, dl, a, al, n);
-  if (MPX_UCMP(d, dl, !=, c, cl)) {
+  if (!mpx_ueq(d, dl, c, cl)) {
     fprintf(stderr, "\n*** lsr(%i) failed\n", n);
     dumpmp("       a", a, al);
     dumpmp("expected", c, cl);
@@ -1121,7 +1147,7 @@ static int uadd(dstr *v)
   ALLOC(d, dl, MAX(al - a, bl - b) + 1);
 
   mpx_uadd(d, dl, a, al, b, bl);
-  if (MPX_UCMP(d, dl, !=, c, cl)) {
+  if (!mpx_ueq(d, dl, c, cl)) {
     fprintf(stderr, "\n*** uadd failed\n");
     dumpmp("       a", a, al);
     dumpmp("       b", b, bl);
@@ -1148,7 +1174,7 @@ static int usub(dstr *v)
   ALLOC(d, dl, al - a);
 
   mpx_usub(d, dl, a, al, b, bl);
-  if (MPX_UCMP(d, dl, !=, c, cl)) {
+  if (!mpx_ueq(d, dl, c, cl)) {
     fprintf(stderr, "\n*** usub failed\n");
     dumpmp("       a", a, al);
     dumpmp("       b", b, bl);
@@ -1175,7 +1201,7 @@ static int umul(dstr *v)
   ALLOC(d, dl, (al - a) + (bl - b));
 
   mpx_umul(d, dl, a, al, b, bl);
-  if (MPX_UCMP(d, dl, !=, c, cl)) {
+  if (!mpx_ueq(d, dl, c, cl)) {
     fprintf(stderr, "\n*** umul failed\n");
     dumpmp("       a", a, al);
     dumpmp("       b", b, bl);
@@ -1200,7 +1226,7 @@ static int usqr(dstr *v)
   ALLOC(d, dl, 2 * (al - a));
 
   mpx_usqr(d, dl, a, al);
-  if (MPX_UCMP(d, dl, !=, c, cl)) {
+  if (!mpx_ueq(d, dl, c, cl)) {
     fprintf(stderr, "\n*** usqr failed\n");
     dumpmp("       a", a, al);
     dumpmp("expected", c, cl);
@@ -1230,8 +1256,8 @@ static int udiv(dstr *v)
   ALLOC(s, sl, (bl - b) + 1);
 
   mpx_udiv(qq, qql, a, al, b, bl, s, sl);
-  if (MPX_UCMP(qq, qql, !=, q, ql) ||
-      MPX_UCMP(a, al, !=, r, rl)) {
+  if (!mpx_ueq(qq, qql, q, ql) ||
+      !mpx_ueq(a, al, r, rl)) {
     fprintf(stderr, "\n*** udiv failed\n");
     dumpmp(" divisor", b, bl);
     dumpmp("expect r", r, rl);
@@ -1263,7 +1289,6 @@ int main(int argc, char *argv[])
   return (0);
 }
 
-
 #endif
 
 /*----- That's all, folks -------------------------------------------------*/
diff --git a/mpx.h b/mpx.h
index 076f14a..cb49bd4 100644
--- a/mpx.h
+++ b/mpx.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mpx.h,v 1.9 1999/12/22 15:49:07 mdw Exp $
+ * $Id: mpx.h,v 1.10 2000/10/08 12:06:12 mdw Exp $
  *
  * Low level multiprecision arithmetic
  *
@@ -30,6 +30,9 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: mpx.h,v $
+ * Revision 1.10  2000/10/08 12:06:12  mdw
+ * Provide @mpx_ueq@ for rapidly testing equality of two integers.
+ *
  * Revision 1.9  1999/12/22 15:49:07  mdw
  * New function for division by a small integer.
  *
@@ -313,6 +316,19 @@ extern void mpx_lsr(mpw */*dv*/, mpw */*dvl*/,
 extern void mpx_2c(mpw */*dv*/, mpw */*dvl*/,
 		   const mpw */*v*/, const mpw */*vl*/);
 
+/* --- @mpx_ueq@ --- *
+ *
+ * Arguments:	@const mpw *av, *avl@ = first argument vector base and limit
+ *		@const mpw *bv, *bvl@ = second argument vector base and limit
+ *
+ * Returns:	Nonzero if the two vectors are equal.
+ *
+ * Use:		Performs an unsigned integer test for equality.
+ */
+
+extern int mpx_ueq(const mpw */*av*/, const mpw */*avl*/,
+		   const mpw */*bv*/, const mpw */*bvl*/);
+
 /* --- @mpx_ucmp@ --- *
  *
  * Arguments:	@const mpw *av, *avl@ = first argument vector base and limit
-- 
2.11.0