[Feature #21796] unpack variant `^` that returns the final offset (#15647)

[Feature #21796] unpack variant `^` that returns the current offset

1 files changed, 4 insertions, 0 deletions

diff --git a/pack.c b/pack.c
index d2fb4f633f..f956e686e3 100644
--- a/pack.c
+++ b/pack.c
@@ -1570,6 +1570,10 @@ pack_unpack_internal(VALUE str, VALUE fmt, enum unpack_mode mode, long offset)
             s += len;
             break;
 
+          case '^':
+            UNPACK_PUSH(SSIZET2NUM(s - RSTRING_PTR(str)));
+            break;
+
           case 'P':
             if (sizeof(char *) <= (size_t)(send - s)) {
                 VALUE tmp = Qnil;