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-rw-r--r--erts/emulator/beam/erl_unicode.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_unicode.c b/erts/emulator/beam/erl_unicode.c
index 1e729cfc2e..3434ce3979 100644
--- a/erts/emulator/beam/erl_unicode.c
+++ b/erts/emulator/beam/erl_unicode.c
@@ -2023,6 +2023,79 @@ BIF_RETTYPE binary_to_existing_atom_2(BIF_ALIST_2)
* Simpler non-interruptable routines for UTF-8 and
* Windowish UTF-16 (restricted)
**********************************************************/
+/*
+ * This function is the heart of the Unicode support for
+ * open_port - spawn_executable. It converts both the name
+ * of the executable and the arguments according to the same rules
+ * as for filename conversion. That means as if your arguments are
+ * to be raw, you supply binaries, else unicode characters are allowed up to
+ * the encoding maximum (256 of the unicode max).
+ * Depending on the filename encoding standard, the vector is then
+ * converted to whatever is used, which might mean win_utf16 if on windows.
+ * Do not peek into the argument vector or filenam with ordinary
+ * string routines, that will certainly fail on some OS.
+ */
+
+char *erts_convert_filename_to_native(Eterm name, ErtsAlcType_t alloc_type, int allow_empty)
+{
+ int encoding = erts_get_native_filename_encoding();
+ char* name_buf = NULL;
+
+ if (is_atom(name) || is_list(name) || (allow_empty && is_nil(name))) {
+ Sint need;
+ if ((need = erts_native_filename_need(name,encoding)) < 0) {
+ return NULL;
+ }
+ if (encoding == ERL_FILENAME_WIN_WCHAR) {
+ need += 2;
+ } else {
+ ++need;
+ }
+ name_buf = (char *) erts_alloc(alloc_type, need);
+ erts_native_filename_put(name,encoding,(byte *)name_buf);
+ name_buf[need-1] = 0;
+ if (encoding == ERL_FILENAME_WIN_WCHAR) {
+ name_buf[need-2] = 0;
+ }
+ } else if (is_binary(name)) {
+ byte *temp_alloc = NULL;
+ byte *bytes;
+ byte *err_pos;
+ Uint size,num_chars;
+
+ size = binary_size(name);
+ bytes = erts_get_aligned_binary_bytes(name, &temp_alloc);
+ if (encoding != ERL_FILENAME_WIN_WCHAR) {
+ /*Add 0 termination only*/
+ name_buf = (char *) erts_alloc(alloc_type, size+1);
+ memcpy(name_buf,bytes,size);
+ name_buf[size]=0;
+ } else if (erts_analyze_utf8(bytes,size,&err_pos,&num_chars,NULL) != ERTS_UTF8_OK ||
+ erts_get_user_requested_filename_encoding() == ERL_FILENAME_LATIN1) {
+ byte *p;
+ /* What to do now? Maybe latin1, so just take byte for byte instead */
+ name_buf = (char *) erts_alloc(alloc_type, (size+1)*2);
+ p = (byte *) name_buf;
+ while (size--) {
+ *p++ = *bytes++;
+ *p++ = 0;
+ }
+ *p++ = 0;
+ *p++ = 0;
+ } else { /* WIN_WCHAR and valid UTF8 */
+ name_buf = (char *) erts_alloc(alloc_type, (num_chars+1)*2);
+ erts_copy_utf8_to_utf16_little((byte *) name_buf, bytes, num_chars);
+ name_buf[num_chars*2] = 0;
+ name_buf[num_chars*2+1] = 0;
+ }
+ erts_free_aligned_binary_bytes(temp_alloc);
+ } else {
+ return NULL;
+ }
+ return name_buf;
+}
+
+
Sint erts_native_filename_need(Eterm ioterm, int encoding)
{
Eterm *objp;