Index: Build/source/texk/web2c/mplibdir/mp.w
===================================================================
--- Build/source/texk/web2c/mplibdir/mp.w	(revision 30927)
+++ Build/source/texk/web2c/mplibdir/mp.w	(revision 30928)
@@ -1,4 +1,4 @@
-% $Id: mp.w 1901 2013-05-22 14:42:19Z taco $
+% $Id: mp.w 1918 2013-06-13 12:47:55Z taco $
 %
 % This file is part of MetaPost;
 % the MetaPost program is in the public domain.
@@ -73,12 +73,12 @@
 @^extensions to \MP@>
 @^system dependencies@>
 
-@d default_banner "This is MetaPost, Version 1.802" /* printed when \MP\ starts */
+@d default_banner "This is MetaPost, Version 1.803" /* printed when \MP\ starts */
 @d true 1
 @d false 0
 
 @<Metapost version header@>=
-#define metapost_version "1.802"
+#define metapost_version "1.803"
 
 @ The external library header for \MP\ is |mplib.h|. It contains a
 few typedefs and the header defintions for the externally used
@@ -516,8 +516,8 @@
   /* open the terminal for output */
   t_open_out();
 #if DEBUG
-  setlinebuf(stdout);
-  setlinebuf(mp->term_out);
+  setvbuf(stdout, (char *) NULL, _IONBF, 0);
+  setvbuf(mp->term_out, (char *) NULL, _IONBF, 0);
 #endif
   if (opt->math_mode == mp_math_scaled_mode) {
     mp->math = mp_initialize_scaled_math(mp);
@@ -8330,8 +8330,8 @@
 @ @c
 void mp_curl_ratio (MP mp, mp_number *ret, mp_number gamma_orig, mp_number a_tension, mp_number b_tension) {
   mp_number alpha, beta, gamma, num, denom, ff; /* registers */
-  mp_number n1;
-  new_number (n1);
+  mp_number arg1;
+  new_number (arg1);
   new_fraction (alpha);
   new_fraction (beta);
   new_fraction (gamma);
@@ -8342,49 +8342,33 @@
   make_fraction (beta, unity_t, b_tension);
   number_clone (gamma, gamma_orig);
   if (number_lessequal(alpha, beta)) {
-    mp_number arg1;
-    new_number (arg1);
     make_fraction (ff, alpha, beta);
     number_clone (arg1, ff);
     take_fraction (ff, arg1, arg1);
     number_clone (arg1, gamma);
     take_fraction (gamma, arg1, ff);
     convert_fraction_to_scaled (beta);
-    set_number_from_addition (arg1, alpha, three_t);
-    number_substract (arg1, beta);
-    take_fraction (denom, gamma, arg1);
-    set_number_from_substraction (arg1, fraction_three_t, alpha);
-    number_add (arg1, beta);
-    take_fraction (num, gamma, arg1);
-    free_number (arg1);
+    take_fraction (denom, gamma, alpha);
+    number_add (denom, three_t);
   } else {
-    mp_number arg1, r1;
-    new_number (arg1);
-    new_number (r1);
     make_fraction (ff, beta, alpha);
     number_clone (arg1, ff);
     take_fraction (ff, arg1, arg1);
     take_fraction (arg1, beta, ff);
     convert_fraction_to_scaled (arg1);
-    number_clone (beta, arg1);   
-    take_fraction (arg1, gamma, alpha);
-    new_number (denom);
-    {
-      set_number_from_div (n1, ff, twelvebits_3);
-      number_clone (denom, arg1);
-      number_add (denom, n1);
-      number_substract (denom, beta);
-    }
-    set_number_from_substraction (arg1, fraction_three_t, alpha);
-    take_fraction (num, gamma, arg1);
-    number_add (num, beta);
-    free_number (arg1);
-    free_number (r1);
+    number_clone (beta, arg1);
+    take_fraction (denom, gamma, alpha);
+    set_number_from_div (arg1, ff, twelvebits_3);
+    number_add (denom, arg1);
   }
-  number_clone (n1, denom);
-  number_double (n1);
-  number_double (n1); /* n1 = 4*denom */
-  if (number_greaterequal(num, n1)) {
+  number_substract (denom, beta);
+  set_number_from_substraction (arg1, fraction_three_t, alpha);
+  take_fraction (num, gamma, arg1);
+  number_add (num, beta);
+  number_clone (arg1, denom);
+  number_double (arg1);
+  number_double (arg1); /* arg1 = 4*denom */
+  if (number_greaterequal(num, arg1)) {
     number_clone(*ret, fraction_four_t);
   } else {
     make_fraction (*ret, num, denom);
@@ -8395,7 +8379,7 @@
   free_number (num);
   free_number (denom);
   free_number (ff);
-  free_number (n1);
+  free_number (arg1);
 }
 
 
Index: Build/source/texk/web2c/mplibdir/mpmathdouble.w
===================================================================
--- Build/source/texk/web2c/mplibdir/mpmathdouble.w	(revision 30927)
+++ Build/source/texk/web2c/mplibdir/mpmathdouble.w	(revision 30928)
@@ -1,4 +1,4 @@
-% $Id: mpmathdouble.w 1892 2013-03-22 10:21:05Z taco $
+% $Id: mpmathdouble.w 1915 2013-06-13 10:17:31Z taco $
 %
 % This file is part of MetaPost;
 % the MetaPost program is in the public domain.
@@ -17,13 +17,13 @@
 @ Introduction.
 
 @c 
-#define _ISOC99_SOURCE /* to get the round() prototype */
 #include <w2c/config.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
 #include "mpmathdouble.h" /* internal header */
+#define ROUND(a) floor((a)+0.5)
 @h
 
 @ @c
@@ -402,11 +402,7 @@
 }
 void mp_number_angle_to_scaled (mp_number *A) {
     A->type = mp_scaled_type;
-    if (A->data.dval >= 0) {
-      A->data.dval = round(A->data.dval) / angle_multiplier;
-    } else {
-      A->data.dval = -((-round(A->data.dval))/ angle_multiplier);
-    }
+    A->data.dval = ROUND(A->data.dval) / angle_multiplier;
 }
 void mp_number_scaled_to_fraction (mp_number *A) {
     A->type = mp_fraction_type;
@@ -422,7 +418,7 @@
 
 @c
 int mp_number_to_scaled(mp_number A) {
-  return (int)round(A.data.dval * 65536.0);
+  return (int)ROUND(A.data.dval * 65536.0);
 }
 int mp_number_to_int(mp_number A) {
   return (int)(A.data.dval);
@@ -434,7 +430,7 @@
   return A.data.dval;
 }
 int mp_number_odd(mp_number A) {
-  return odd((int)round(A.data.dval * 65536.0));
+  return odd((int)ROUND(A.data.dval * 65536.0));
 }
 int mp_number_equal(mp_number A, mp_number B) {
   return (A.data.dval==B.data.dval);
@@ -962,7 +958,7 @@
 @ |round_unscaled| rounds a |scaled| and converts it to |int|
 @c
 int mp_round_unscaled(mp_number x_orig) {
-  int x = (int)round(x_orig.data.dval);
+  int x = (int)ROUND(x_orig.data.dval);
   return x;
 }
 
Index: Build/source/texk/web2c/mplibdir/ChangeLog
===================================================================
--- Build/source/texk/web2c/mplibdir/ChangeLog	(revision 30927)
+++ Build/source/texk/web2c/mplibdir/ChangeLog	(revision 30928)
@@ -1,3 +1,7 @@
+2013-06-16 Taco Hoekwater  <taco@luatex.org>
+
+	Import metapost 1.803 (released version)
+
 2013-05-22 Taco Hoekwater  <taco@luatex.org>
 
 	* svgout.w: fix a problem with overly large characters in
Index: Build/source/texk/web2c/mplibdir/mpost.w
===================================================================
--- Build/source/texk/web2c/mplibdir/mpost.w	(revision 30927)
+++ Build/source/texk/web2c/mplibdir/mpost.w	(revision 30928)
@@ -1,4 +1,4 @@
-% $Id: mpost.w 1895 2013-03-27 11:17:17Z taco $
+% $Id: mpost.w 1916 2013-06-13 10:19:49Z taco $
 %
 % This file is part of MetaPost;
 % the MetaPost program is in the public domain.
@@ -443,7 +443,7 @@
       mpost_xfree(mpversion);
     }
   }
-
+  
   mpost_xfree (cnf_cmd);
   return (int)(ret == 0);
 }
@@ -1290,6 +1290,17 @@
 @ Now this is really it: \MP\ starts and ends here.
 
 @c 
+static char *cleaned_invocation_name(char *arg)
+{
+    char *ret, *dot;
+    const char *start = xbasename(arg);
+    ret = xstrdup(start);
+    dot = strrchr(ret, '.');
+    if (dot != NULL) {
+        *dot = 0;               /* chop */
+    }
+    return ret;
+}
 int
 #if defined(WIN32) && !defined(__MINGW32__) && defined(DLLPROC)
 DLLPROC (int argc, char **argv)
@@ -1306,8 +1317,8 @@
   options->ini_version       = (int)false;
   options->print_found_names = (int)true;
   {
-    const char *base = xbasename(argv[0]);
-    if (!strcmp(base, "dvitomp") || !strcasecmp(base, "dvitomp.exe"))
+    const char *base = cleaned_invocation_name(argv[0]);
+    if (FILESTRCASEEQ(base, "dvitomp"))
       dvitomp_only=1;
   }
   if (dvitomp_only) {