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Index: mpi-1.8.6/mpi-types.h
===================================================================
--- mpi-1.8.6.orig/mpi-types.h
+++ mpi-1.8.6/mpi-types.h
@@ -1,17 +1,56 @@
-/* Type definitions generated by 'types.pl' */
+/*
+ * Universal. We can further tweak these by making them
+ * bitfields inside the mp_int struct.
+ */
+typedef int mp_sign;
+typedef int mp_size;
 
-typedef char               mp_sign;
-typedef unsigned short     mp_digit;  /* 2 byte type */
-typedef unsigned int       mp_word;   /* 4 byte type */
-typedef unsigned int       mp_size;
-typedef int                mp_err;
+/*
+ * Universal. Does not need platform configuration.
+ */
+typedef int mp_err;
 
-#define MP_DIGIT_BIT       (CHAR_BIT*sizeof(mp_digit))
-#define MP_DIGIT_MAX       USHRT_MAX
-#define MP_WORD_BIT        (CHAR_BIT*sizeof(mp_word))
-#define MP_WORD_MAX        UINT_MAX
+#if HAVE_USUPERLONG_T && HAVE_ULONGLONG_T && \
+    SIZEOF_SUPERLONG_T / 2 == SIZEOF_LONGLONG_T && \
+    SIZEOF_PTR >= SIZEOF_LONGLONG_T
+  typedef ulonglong_t mp_digit;
+  typedef usuperlong_t mp_word;
+  #define MP_DIGIT_SIZE SIZEOF_LONGLONG_T
+  #define DIGIT_FMT "%" #SIZEOF_SUPERLONG_T "llx"
+#elif HAVE_ULONGLONG_T && SIZEOF_LONGLONG_T / 2 == SIZEOF_LONG && \
+      SIZEOF_PTR >= SIZEOF_LONG
+  typedef unsigned long mp_digit;
+  typedef ulonglong_t mp_word;
+  #define MP_DIGIT_SIZE SIZEOF_LONG
+  #define DIGIT_FMT "%" #SIZEOF_LONGLONG_T "lx"
+#elif HAVE_ULONGLONG_T && SIZEOF_LONGLONG_T / 2 == SIZEOF_INT && \
+      SIZEOF_PTR >= SIZEOF_INT
+  typedef unsigned int mp_digit;
+  typedef ulonglong_t mp_word;
+  #define MP_DIGIT_SIZE SIZEOF_INT
+  #define DIGIT_FMT "%" #SIZEOF_LONGLONG_T "lx"
+#elif SIZEOF_LONG / 2 == SIZEOF_INT && SIZEOF_PTR >= SIZEOF_INT
+  typedef unsigned int mp_digit;
+  typedef unsigned long mp_word;
+  #define MP_DIGIT_SIZE SIZEOF_INT
+  #define DIGIT_FMT "%" #SIZEOF_LONG "x"
+#elif SIZEOF_INT / 2 == SIZEOF_SHORT
+  typedef unsigned short mp_digit;
+  typedef unsigned int mp_word;
+  #define MP_DIGIT_SIZE SIZEOF_SHORT
+  #define DIGIT_FMT "%" #SIZEOF_INT "x"
+#elif SIZEOF_SHORT == 2
+  typedef unsigned char mp_digit;
+  typedef unsigned short mp_word;
+  #define MP_DIGIT_SIZE 1
+  #define DIGIT_FMT "%" #SIZEOF_SHORT "x"
+#else
+  #error Failure to configure MPI types on this target platform
+#endif
 
-#define RADIX              (MP_DIGIT_MAX+1)
+#define MP_DIGIT_BIT       ((int) (CHAR_BIT*sizeof(mp_digit)))
+#define MP_DIGIT_MAX       ((mp_digit) -1)
+#define MP_WORD_BIT        ((int) (CHAR_BIT*sizeof(mp_word)))
+#define MP_WORD_MAX        ((mp_word) -1)
 
-#define MP_DIGIT_SIZE      2
-#define DIGIT_FMT          "%04X"
+#define RADIX              (((mp_word) MP_DIGIT_MAX) + 1)
Index: mpi-1.8.6/mpi.c
===================================================================
--- mpi-1.8.6.orig/mpi.c
+++ mpi-1.8.6/mpi.c
@@ -9,6 +9,7 @@
     $Id: mpi.c,v 1.1 2004/02/08 04:29:29 sting Exp $
  */
 
+#include "../config.h"
 #include "mpi.h"
 #include <stdlib.h>
 #include <string.h>
Index: mpi-1.8.6/mplogic.c
===================================================================
--- mpi-1.8.6.orig/mplogic.c
+++ mpi-1.8.6/mplogic.c
@@ -9,6 +9,7 @@
     $Id: mplogic.c,v 1.1 2004/02/08 04:29:29 sting Exp $
  */
 
+#include "../config.h"
 #include "mplogic.h"
 #include <stdlib.h>
 
Index: mpi-1.8.6/mpprime.c
===================================================================
--- mpi-1.8.6.orig/mpprime.c
+++ mpi-1.8.6/mpprime.c
@@ -10,6 +10,7 @@
     $Id: mpprime.c,v 1.1 2004/02/08 04:29:29 sting Exp $
  */
 
+#include "../config.h"
 #include "mpprime.h"
 #include <stdlib.h>
 
Index: mpi-1.8.6/mprsa.c
===================================================================
--- mpi-1.8.6.orig/mprsa.c
+++ mpi-1.8.6/mprsa.c
@@ -11,6 +11,7 @@
   $Id: mprsa.c,v 1.1 2004/02/08 04:29:29 sting Exp $
  */
 
+#include "../config.h"
 #include "mprsa.h"
 #include <stdlib.h>
 #include <string.h>