1 files changed, 211 insertions, 0 deletions
diff --git a/erts/emulator/beam/external.h b/erts/emulator/beam/external.h
new file mode 100644
index 0000000000..f308680f89
--- /dev/null
+++ b/erts/emulator/beam/external.h
@@ -0,0 +1,211 @@
+/*
+ * %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%
+ */
+
+/* Same order as the ordering of terms in erlang */
+
+/* Since there are 255 different External tag values to choose from
+   There is no reason to not be extravagant.
+   Hence, the different tags for large/small tuple e.t.c
+*/
+
+
+#ifdef ERTS_WANT_EXTERNAL_TAGS
+#ifndef ERTS_EXTERNAL_TAGS
+#define ERTS_EXTERNAL_TAGS
+
+#define SMALL_INTEGER_EXT 'a'
+#define INTEGER_EXT       'b'
+#define FLOAT_EXT         'c'
+#define ATOM_EXT          'd'
+#define SMALL_ATOM_EXT    's'
+#define REFERENCE_EXT     'e'
+#define NEW_REFERENCE_EXT 'r'
+#define PORT_EXT          'f'
+#define NEW_FLOAT_EXT     'F'
+#define PID_EXT           'g'
+#define SMALL_TUPLE_EXT   'h'
+#define LARGE_TUPLE_EXT   'i'
+#define NIL_EXT           'j'
+#define STRING_EXT        'k'
+#define LIST_EXT          'l'
+#define BINARY_EXT        'm'
+#define BIT_BINARY_EXT    'M'
+#define SMALL_BIG_EXT     'n'
+#define LARGE_BIG_EXT     'o'
+#define NEW_FUN_EXT       'p'
+#define EXPORT_EXT        'q'
+#define FUN_EXT           'u'
+
+#define DIST_HEADER       'D'
+#define ATOM_CACHE_REF    'R'
+#define COMPRESSED        'P'
+
+#if 0
+/* Not used anymore */
+#define CACHED_ATOM       'C'
+#define NEW_CACHE         'N'
+#endif
+
+
+#define VERSION_MAGIC 131   /* 130 in erlang 4.2 */
+                /* Increment this when changing the external format. */
+                /* ON the other hand, don't change the external format */
+                /* since that breaks other people's code! */
+
+#endif /* ERTS_EXTERNAL_TAGS */
+#endif /* ERTS_WANT_EXTERNAL_TAGS */
+
+#ifndef ERL_EXTERNAL_H__
+#define ERL_EXTERNAL_H__
+
+#include "erl_node_tables.h"
+
+#define ERTS_ATOM_CACHE_SIZE 2048
+
+typedef struct cache {
+    Eterm in_arr[ERTS_ATOM_CACHE_SIZE];
+    Eterm out_arr[ERTS_ATOM_CACHE_SIZE];
+} ErtsAtomCache;
+
+typedef struct {
+    int hdr_sz;
+    int sz;
+    int cix[ERTS_ATOM_CACHE_SIZE];
+    struct {
+	Eterm atom;
+	int iix;
+    } cache[ERTS_ATOM_CACHE_SIZE];
+} ErtsAtomCacheMap;
+
+typedef struct {
+    Uint32 size;
+    Eterm atom[ERTS_ATOM_CACHE_SIZE];
+} ErtsAtomTranslationTable;
+
+#define ERTS_DIST_EXT_DFLAG_HDR (((Uint32) 1) << 31)
+#define ERTS_DIST_EXT_ATOM_TRANS_TAB (((Uint32) 1) << 30)
+#define ERTS_DIST_EXT_CON_ID_MASK ((Uint32) 0x3fffffff)
+
+#define ERTS_DIST_EXT_CON_ID(DIST_EXTP) \
+  ((DIST_EXTP)->flags & ERTS_DIST_EXT_CON_ID_MASK)
+typedef struct {
+    DistEntry *dep;
+    byte *extp;
+    byte *ext_endp;
+    Sint heap_size;
+    Uint32 flags;
+    ErtsAtomTranslationTable attab;
+} ErtsDistExternal;
+
+typedef struct {
+    int have_header;
+    int cache_entries;
+} ErtsDistHeaderPeek;
+
+#define ERTS_DIST_EXT_SIZE(EDEP) \
+  (sizeof(ErtsDistExternal) \
+   - (((EDEP)->flags & ERTS_DIST_EXT_ATOM_TRANS_TAB) \
+      ? (ASSERT_EXPR(0 <= (EDEP)->attab.size \
+		     && (EDEP)->attab.size <= ERTS_ATOM_CACHE_SIZE), \
+	 sizeof(Eterm)*(ERTS_ATOM_CACHE_SIZE - (EDEP)->attab.size)) \
+      : sizeof(ErtsAtomTranslationTable)))
+
+typedef struct {
+    byte *extp;
+    int exttmp;
+} ErtsBinary2TermState;
+
+/* -------------------------------------------------------------------------- */
+
+void erts_init_atom_cache_map(ErtsAtomCacheMap *);
+void erts_reset_atom_cache_map(ErtsAtomCacheMap *);
+void erts_destroy_atom_cache_map(ErtsAtomCacheMap *);
+void erts_finalize_atom_cache_map(ErtsAtomCacheMap *);
+Uint erts_encode_ext_dist_header_size(ErtsAtomCacheMap *);
+
+Uint erts_encode_ext_dist_header_size(ErtsAtomCacheMap *);
+byte *erts_encode_ext_dist_header_setup(byte *, ErtsAtomCacheMap *);
+byte *erts_encode_ext_dist_header_finalize(byte *, ErtsAtomCache *);
+Uint erts_encode_dist_ext_size(Eterm, Uint32, ErtsAtomCacheMap *);
+void erts_encode_dist_ext(Eterm, byte **, Uint32, ErtsAtomCacheMap *);
+
+Uint erts_encode_ext_size(Eterm);
+void erts_encode_ext(Eterm, byte **);
+
+#ifdef ERTS_WANT_EXTERNAL_TAGS
+ERTS_GLB_INLINE void erts_peek_dist_header(ErtsDistHeaderPeek *, byte *, Uint);
+#endif
+ERTS_GLB_INLINE void erts_free_dist_ext_copy(ErtsDistExternal *);
+ERTS_GLB_INLINE void *erts_dist_ext_trailer(ErtsDistExternal *);
+ErtsDistExternal *erts_make_dist_ext_copy(ErtsDistExternal *, Uint);
+void *erts_dist_ext_trailer(ErtsDistExternal *);
+void erts_destroy_dist_ext_copy(ErtsDistExternal *);
+int erts_prepare_dist_ext(ErtsDistExternal *, byte *, Uint,
+			  DistEntry *, ErtsAtomCache *);
+Sint erts_decode_dist_ext_size(ErtsDistExternal *, int);
+Eterm erts_decode_dist_ext(Eterm **, ErlOffHeap *, ErtsDistExternal *);
+
+Sint erts_decode_ext_size(byte*, Uint, int);
+Eterm erts_decode_ext(Eterm **, ErlOffHeap *, byte**);
+
+Eterm erts_term_to_binary(Process* p, Eterm Term, int level, Uint flags);
+
+Sint erts_binary2term_prepare(ErtsBinary2TermState *, byte *, Sint);
+void erts_binary2term_abort(ErtsBinary2TermState *);
+Eterm erts_binary2term_create(ErtsBinary2TermState *, Eterm **hpp, ErlOffHeap *);
+int erts_debug_max_atom_out_cache_index(void);
+int erts_debug_atom_to_out_cache_index(Eterm);
+
+
+#if ERTS_GLB_INLINE_INCL_FUNC_DEF
+#ifdef ERTS_WANT_EXTERNAL_TAGS
+ERTS_GLB_INLINE void
+erts_peek_dist_header(ErtsDistHeaderPeek *dhpp, byte *ext, Uint sz)
+{
+    if (ext[0] == VERSION_MAGIC
+	|| ext[1] != DIST_HEADER
+	|| sz < (1+1+1))
+	dhpp->have_header = 0;
+    else {
+	dhpp->have_header = 1;
+	dhpp->cache_entries = (int) get_int8(&ext[2]);
+    }
+}
+#endif
+
+ERTS_GLB_INLINE void
+erts_free_dist_ext_copy(ErtsDistExternal *edep)
+{
+    if (edep->dep)
+	erts_deref_dist_entry(edep->dep);
+    erts_free(ERTS_ALC_T_EXT_TERM_DATA, edep);
+}
+
+ERTS_GLB_INLINE void *
+erts_dist_ext_trailer(ErtsDistExternal *edep)
+{
+    void *res = (void *) (edep->ext_endp
+			  + ERTS_WORD_ALIGN_PAD_SZ(edep->ext_endp));
+    ASSERT((((Uint) res) % sizeof(Uint)) == 0);
+    return res;
+}
+
+#endif
+
+#endif /* ERL_EXTERNAL_H__ */