1 files changed, 155 insertions, 0 deletions
diff --git a/erts/emulator/beam/big.h b/erts/emulator/beam/big.h
new file mode 100644
index 0000000000..b8e38d482c
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+++ b/erts/emulator/beam/big.h
@@ -0,0 +1,155 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1996-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+
+#ifndef __BIG_H__
+#define __BIG_H__
+
+#ifndef __SYS_H__
+#include "sys.h"
+#endif
+
+#ifndef __CONFIG_H__
+#include "erl_vm.h"
+#endif
+
+#ifndef __GLOBAL_H__
+#include "global.h"
+#endif
+
+typedef Uint     ErtsDigit;
+
+#if (SIZEOF_VOID_P == 4) && defined(SIZEOF_LONG_LONG) && (SIZEOF_LONG_LONG == 8)
+/* Assume 32-bit machine with long long support */
+typedef Uint64   ErtsDoubleDigit;
+typedef Uint16   ErtsHalfDigit;
+#define BIG_HAVE_DOUBLE_DIGIT 1
+
+#elif (SIZEOF_VOID_P == 4)
+/* Assume 32-bit machine with no long support */
+#undef  BIG_HAVE_DOUBLE_DIGIT
+typedef Uint16   ErtsHalfDigit;
+
+#elif (SIZEOF_VOID_P == 8)
+/* Assume 64-bit machine, does it exist 128 bit long long long ? */
+#undef  BIG_HAVE_DOUBLE_DIGIT
+typedef Uint32   ErtsHalfDigit;
+#else
+#error "can not determine machine size"
+#endif
+
+#define D_DECIMAL_EXP	9
+#define D_DECIMAL_BASE	1000000000
+
+typedef Uint  dsize_t;	 /* Vector size type */
+
+#define D_EXP (SIZEOF_VOID_P*8)
+#define D_MASK     ((ErtsDigit)(-1))      /* D_BASE-1 */
+
+/* macros for bignum objects */
+#define big_v(x)       BIG_V(big_val(x))
+#define big_sign(x)    BIG_SIGN(big_val(x))
+#define big_arity(x)   BIG_ARITY(big_val(x))
+#define big_digit(x,i) BIG_DIGIT(big_val(x),i)
+#define big_size(x)    BIG_SIZE(big_val(x))
+
+
+/* macros for thing pointers */
+
+#define BIG_V(xp)        ((ErtsDigit*)((xp)+1))
+#define BIG_SIGN(xp)     (!!bignum_header_is_neg(*xp))
+#define BIG_ARITY(xp)    ((Uint)bignum_header_arity(*(xp)))
+#define BIG_DIGIT(xp,i)  *(BIG_V(xp)+(i))
+#define BIG_DIGITS_PER_WORD (sizeof(Uint)/sizeof(ErtsDigit))
+
+#define BIG_SIZE(xp)  BIG_ARITY(xp)
+
+/* Check for small */
+#define IS_USMALL(sgn,x)  ((sgn) ? ((x) <= MAX_SMALL+1) : ((x) <= MAX_SMALL))
+#define IS_SSMALL(x)      (((x) >= MIN_SMALL) && ((x) <= MAX_SMALL))
+
+/* The heap size needed for a bignum */
+#define BIG_NEED_SIZE(x)  ((x) + 1)
+
+#define BIG_UINT_HEAP_SIZE (1 + 1)	/* always, since sizeof(Uint) <= sizeof(Eterm) */
+
+#ifdef ARCH_32
+
+#define ERTS_UINT64_BIG_HEAP_SIZE__(X) \
+  ((X) >= (((Uint64) 1) << 32) ? (1 + 2) : (1 + 1))
+#define ERTS_SINT64_HEAP_SIZE(X)				\
+  (IS_SSMALL((X))						\
+   ? 0								\
+   : ERTS_UINT64_BIG_HEAP_SIZE__((X) >= 0 ? (X) : -(X)))
+#define ERTS_UINT64_HEAP_SIZE(X)				\
+  (IS_USMALL(0, (X)) ? 0 : ERTS_UINT64_BIG_HEAP_SIZE__((X)))
+
+#else
+
+#define ERTS_SINT64_HEAP_SIZE(X)				\
+  (IS_SSMALL((X)) ? 0 : (1 + 1))
+#define ERTS_UINT64_HEAP_SIZE(X)				\
+  (IS_USMALL(0, (X)) ? 0 : (1 + 1))
+
+#endif
+
+int big_decimal_estimate(Eterm);
+Eterm erts_big_to_list(Eterm, Eterm**);
+char *erts_big_to_string(Eterm x, char *buf, Uint buf_sz);
+
+Eterm small_times(Sint, Sint, Eterm*);
+
+Eterm big_plus(Eterm, Eterm, Eterm*);
+Eterm big_minus(Eterm, Eterm, Eterm*);
+Eterm big_times(Eterm, Eterm, Eterm*);
+Eterm big_div(Eterm, Eterm, Eterm*);
+Eterm big_rem(Eterm, Eterm, Eterm*);
+Eterm big_neg(Eterm, Eterm*);
+
+Eterm big_minus_small(Eterm, Uint, Eterm*);
+Eterm big_plus_small(Eterm, Uint, Eterm*);
+Eterm big_times_small(Eterm, Uint, Eterm*);
+
+Eterm big_band(Eterm, Eterm, Eterm*);
+Eterm big_bor(Eterm, Eterm, Eterm*);
+Eterm big_bxor(Eterm, Eterm, Eterm*);
+Eterm big_bnot(Eterm, Eterm*);
+
+Eterm big_lshift(Eterm, Sint, Eterm*);
+int big_comp (Eterm, Eterm);
+int big_ucomp (Eterm, Eterm);
+int big_to_double(Eterm x, double* resp);
+Eterm small_to_big(Sint, Eterm*);
+Eterm uint_to_big(Uint, Eterm*);
+Eterm erts_make_integer(Uint, Process *);
+
+dsize_t big_bytes(Eterm);
+Eterm bytes_to_big(byte*, dsize_t, int, Eterm*);
+byte* big_to_bytes(Eterm, byte*);
+
+int term_to_Uint(Eterm, Uint*);
+int term_to_Sint(Eterm, Sint*);
+
+Uint32 big_to_uint32(Eterm b);
+int term_equals_2pow32(Eterm);
+
+Eterm erts_uint64_to_big(Uint64, Eterm **);
+Eterm erts_sint64_to_big(Sint64, Eterm **);
+
+#endif
+