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-rw-r--r--erts/emulator/beam/utils.c89
1 files changed, 72 insertions, 17 deletions
diff --git a/erts/emulator/beam/utils.c b/erts/emulator/beam/utils.c
index 457cada745..bab7352479 100644
--- a/erts/emulator/beam/utils.c
+++ b/erts/emulator/beam/utils.c
@@ -42,6 +42,7 @@
#include "dist.h"
#include "erl_printf.h"
#include "erl_threads.h"
+#include "erl_lock_count.h"
#include "erl_smp.h"
#include "erl_time.h"
#include "erl_thr_progress.h"
@@ -3634,13 +3635,78 @@ intlist_to_buf(Eterm list, char *buf, Sint len)
return -2; /* not enough space */
}
-/* Fill buf with the contents of the unicode list.
- * Return the number of bytes in the buffer,
- * or -1 for type error,
- * or -2 for not enough buffer space (buffer contains truncated result).
+/** @brief Fill buf with the UTF8 contents of the unicode list
+ * @param len Max number of characters to write.
+ * @param written NULL or bytes written.
+ * @return 0 ok,
+ * -1 type error,
+ * -2 list too long, only \c len characters written
*/
+int
+erts_unicode_list_to_buf(Eterm list, byte *buf, Sint len, Sint* written)
+{
+ Eterm* listptr;
+ Sint sz = 0;
+ Sint val;
+ int res;
+
+ while (1) {
+ if (is_nil(list)) {
+ res = 0;
+ break;
+ }
+ if (is_not_list(list)) {
+ res = -1;
+ break;
+ }
+ listptr = list_val(list);
+
+ if (len-- <= 0) {
+ res = -2;
+ break;
+ }
+
+ if (is_not_small(CAR(listptr))) {
+ res = -1;
+ break;
+ }
+ val = signed_val(CAR(listptr));
+ if (0 <= val && val < 0x80) {
+ buf[sz] = val;
+ sz++;
+ } else if (val < 0x800) {
+ buf[sz+0] = 0xC0 | (val >> 6);
+ buf[sz+1] = 0x80 | (val & 0x3F);
+ sz += 2;
+ } else if (val < 0x10000UL) {
+ if (0xD800 <= val && val <= 0xDFFF) {
+ res = -1;
+ break;
+ }
+ buf[sz+0] = 0xE0 | (val >> 12);
+ buf[sz+1] = 0x80 | ((val >> 6) & 0x3F);
+ buf[sz+2] = 0x80 | (val & 0x3F);
+ sz += 3;
+ } else if (val < 0x110000) {
+ buf[sz+0] = 0xF0 | (val >> 18);
+ buf[sz+1] = 0x80 | ((val >> 12) & 0x3F);
+ buf[sz+2] = 0x80 | ((val >> 6) & 0x3F);
+ buf[sz+3] = 0x80 | (val & 0x3F);
+ sz += 4;
+ } else {
+ res = -1;
+ break;
+ }
+ list = CDR(listptr);
+ }
+
+ if (written)
+ *written = sz;
+ return res;
+}
+
Sint
-erts_unicode_list_to_buf(Eterm list, byte *buf, Sint len)
+erts_unicode_list_to_buf_len(Eterm list)
{
Eterm* listptr;
Sint sz = 0;
@@ -3653,7 +3719,7 @@ erts_unicode_list_to_buf(Eterm list, byte *buf, Sint len)
}
listptr = list_val(list);
- while (len-- > 0) {
+ while (1) {
Sint val;
if (is_not_small(CAR(listptr))) {
@@ -3661,25 +3727,15 @@ erts_unicode_list_to_buf(Eterm list, byte *buf, Sint len)
}
val = signed_val(CAR(listptr));
if (0 <= val && val < 0x80) {
- buf[sz] = val;
sz++;
} else if (val < 0x800) {
- buf[sz+0] = 0xC0 | (val >> 6);
- buf[sz+1] = 0x80 | (val & 0x3F);
sz += 2;
} else if (val < 0x10000UL) {
if (0xD800 <= val && val <= 0xDFFF) {
return -1;
}
- buf[sz+0] = 0xE0 | (val >> 12);
- buf[sz+1] = 0x80 | ((val >> 6) & 0x3F);
- buf[sz+2] = 0x80 | (val & 0x3F);
sz += 3;
} else if (val < 0x110000) {
- buf[sz+0] = 0xF0 | (val >> 18);
- buf[sz+1] = 0x80 | ((val >> 12) & 0x3F);
- buf[sz+2] = 0x80 | ((val >> 6) & 0x3F);
- buf[sz+3] = 0x80 | (val & 0x3F);
sz += 4;
} else {
return -1;
@@ -3693,7 +3749,6 @@ erts_unicode_list_to_buf(Eterm list, byte *buf, Sint len)
}
listptr = list_val(list);
}
- return -2; /* not enough space */
}
/*