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-rw-r--r--lib/erl_interface/src/legacy/erl_eterm.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/lib/erl_interface/src/legacy/erl_eterm.c b/lib/erl_interface/src/legacy/erl_eterm.c
index e4b3b49c7d..5153d0f2e7 100644
--- a/lib/erl_interface/src/legacy/erl_eterm.c
+++ b/lib/erl_interface/src/legacy/erl_eterm.c
@@ -188,14 +188,20 @@ char* erl_atom_ptr_latin1(Erl_Atom_data* a)
char* erl_atom_ptr_utf8(Erl_Atom_data* a)
{
if (a->utf8 == NULL) {
- int dlen = a->lenL * 2; /* over estimation */
- a->utf8 = malloc(dlen + 1);
- a->lenU = latin1_to_utf8(a->utf8, a->latin1, a->lenL, dlen, NULL);
- a->utf8[a->lenU] = '\0';
+ erlang_char_encoding enc;
+ a->lenU = latin1_to_utf8(NULL, a->latin1, a->lenL, a->lenL*2, &enc);
+ if (enc == ERLANG_ASCII) {
+ a->utf8 = a->latin1;
+ }
+ else {
+ a->utf8 = malloc(a->lenU + 1);
+ latin1_to_utf8(a->utf8, a->latin1, a->lenL, a->lenU, NULL);
+ a->utf8[a->lenU] = '\0';
+ }
}
return a->utf8;
-
}
+
int erl_atom_size_latin1(Erl_Atom_data* a)
{
if (a->latin1 == NULL) {