Feature #12754: Want to use prepared buffer with `Array#pack`

• Status: Closed
• Assignee: -
• Target version: -

[usa (Usaku NAKAMURA)]

Array#pack always returns new allocated String, but sometimes users want to use prepared buffer, especially the packed size is too large.
I often uses Fiddle to call OS APIs, and encounter this problem as every time.
I recommend to add keyword arguments for the purpose.

buf = '\0'*(32 * 1024 * 1024)
# ...
ary.pack(LONG_FORMAT, buffer: buf, offset: 4 * 1024) # returns `buf`

[nobu (Nobuyoshi Nakada)]

Array#pack provides @ for offset.

[nobu (Nobuyoshi Nakada)]

• Tracker changed from Bug to Feature

[matz (Yukihiro Matsumoto)]

Accepted.

Matz.

[usa (Usaku NAKAMURA)]

• Status changed from Open to Closed

Applied in changeset r56957.

---

Supports buffer and offset in Array#pack

• pack.c (pack_pack): Supports buffer and offset in Array#pack.
  [Feature #12754] [ruby-dev:49798]