[project @ 1999-07-06 15:20:59 by sewardj]

Header file for an alternative bignum implementation, which is in
interpreter/sainteger.c.  Currently used by STGHugs.
Temporary -- until we resolve GMP licensing issues.

ghc/includes/sainteger.h

+
+#define B_BASE 256
+#define B_BASE_FLT (256.0)
+
+/* this really ought to be abstract */
+typedef 
+   struct {
+      int            sign;
+      int            size;
+      int            used;
+      unsigned char  stuff[0];
+   }
+   B;
+
+/* the ops themselves */
+int  do_getsign  ( B* x );
+int  do_cmp      ( B* x, B* y );
+void do_add      ( B* x, B* y, int sizeRes, B* res );
+void do_sub      ( B* x, B* y, int sizeRes, B* res );
+void do_mul      ( B* x, B* y, int sizeRes, B* res );
+void do_qrm      ( B* x, B* y, int sizeRes, B* qres, B* rres );
+void do_neg      ( B* x,       int sizeRes, B* res );
+
+void do_renormalise ( B* x );
+int  is_sane ( B* x );
+
+void do_fromInt  ( int            n,   int sizeRes, B*   res );
+void do_fromWord ( unsigned int   n,   int sizeRes, B*   res );
+void do_fromStr  ( char*        str,   int sizeRes, B*   res );
+
+int          do_toInt    ( B* x );
+unsigned int do_toWord   ( B* x );
+float        do_toFloat  ( B* x );
+double       do_toDouble ( B* x );
+
+/* the number of bytes needed to hold result of an op */
+int  size_add      ( B* x, B* y );
+int  size_sub      ( B* x, B* y );
+int  size_mul      ( B* x, B* y );
+int  size_qrm      ( B* x, B* y );
+int  size_neg      ( B* x );
+int  size_fromInt  ( void );
+int  size_fromWord ( void );
+int  size_fromStr  ( char* str );
+int  size_dblmantissa ( void );
+int  size_fltmantissa ( void );
+