ETS 'compressed' option.

The compressed format is using a slighty modified variant of the extern format
(term_to_binary). To not worsen key lookup's too much, the top tuple itself
and the key element are not compressed. Table objects with only immediate
non-key elements will therefor not gain anything (but actually consume one
extra word for "alloc_size").

1 files changed, 10 insertions, 0 deletions

diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index 93203a08a9..0d15272aa8 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -1166,6 +1166,15 @@ void* sys_calloc2(Uint, Uint);
                             ((char*)(s))[3] = (char)(i)         & 0xff;} \
                         while (0)
 
+#define get_int24(s) ((((unsigned char*) (s))[0] << 16) | \
+                      (((unsigned char*) (s))[1] << 8)  | \
+                      (((unsigned char*) (s))[2]))
+
+#define put_int24(i, s) do {((char*)(s))[0] = (char)((i) >> 16) & 0xff;  \
+                            ((char*)(s))[1] = (char)((i) >> 8)  & 0xff;  \
+                            ((char*)(s))[2] = (char)(i)         & 0xff;} \
+                        while (0)
+
 #define get_int16(s) ((((unsigned char*)  (s))[0] << 8) | \
                       (((unsigned char*)  (s))[1]))
 
@@ -1179,6 +1188,7 @@ void* sys_calloc2(Uint, Uint);
 
 #define put_int8(i, s) do {((unsigned char*)(s))[0] = (i) & 0xff;} while (0)
 
+
 /*
  * Use DEBUGF as you would use printf, but use double parentheses:
  *