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authorBjörn-Egil Dahlberg <[email protected]>2013-10-01 19:27:54 +0200
committerBjörn-Egil Dahlberg <[email protected]>2014-01-28 15:56:26 +0100
commit92303a2e1abdf74aa3bc3af095131a59a601c45e (patch)
tree0d24f6cd9717659942463e9055f488d77678e673 /erts/emulator/beam/utils.c
parent03d5bb0d1bd5d7c4e09ee793a680f2d538fe0122 (diff)
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erts: Add phash2 Map functionality
Diffstat (limited to 'erts/emulator/beam/utils.c')
-rw-r--r--erts/emulator/beam/utils.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/erts/emulator/beam/utils.c b/erts/emulator/beam/utils.c
index 6cdfd1c989..bc7e91295d 100644
--- a/erts/emulator/beam/utils.c
+++ b/erts/emulator/beam/utils.c
@@ -1088,6 +1088,7 @@ make_hash2(Eterm term)
#define HCONST_13 0x08d12e65UL
#define HCONST_14 0xa708a81eUL
#define HCONST_15 0x454021d7UL
+#define HCONST_16 0xe3779b90UL
#define UINT32_HASH_2(Expr1, Expr2, AConst) \
do { \
@@ -1190,6 +1191,28 @@ make_hash2(Eterm term)
term = elem[1];
}
break;
+ case MAP_SUBTAG:
+ {
+ map_t *mp = (map_t *)map_val(term);
+ int i;
+ int size = map_get_size(mp);
+ Eterm *ks = map_get_keys(mp);
+ Eterm *vs = map_get_values(mp);
+ UINT32_HASH(size, HCONST_16);
+ if (size == 0) /* Empty Map */
+ goto hash2_common;
+
+ for (i = size - 1; i >= 0; i--) {
+ tmp = vs[i];
+ ESTACK_PUSH(s, tmp);
+ }
+ for (i = size - 1; i >= 1; i--) {
+ tmp = ks[i];
+ ESTACK_PUSH(s, tmp);
+ }
+ term = ks[0];
+ }
+ break;
case EXPORT_SUBTAG:
{
Export* ep = *((Export **) (export_val(term) + 1));