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[DOC] mention rb_str_modify

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[ruby-core:91134] [Bug #15543]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66861 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2019-01-18 02:36:14 +00:00
parent b4ab9c0e32
commit 7a86165d43
2 changed files with 16 additions and 0 deletions
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8
doc/extension.ja.rdoc
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@ -301,6 +301,14 @@ rb_str_set_len(VALUE str, long len) ::
lenバイトまでの内容は保存される．lenはstrの容量を越えてい
てはならない．
rb_str_modify(VALUE str) ::
Rubyの文字列の変更する準備をする．strが変更可能でなければ例
外が発生する．strのバッファが共有されている場合は，新しいバッ
ファを割り当てて共有されていない状態にする．RSTRING_PTRを使っ
て中身を変更したり，rb_str_set_lenを呼んだりする前には，
必ずこの関数を呼ばなけれならない．
==== 配列に対する関数
rb_ary_new() ::

8
doc/extension.rdoc
View file

@ -279,6 +279,14 @@ rb_str_set_len(VALUE str, long len) ::
up to len bytes, regardless RSTRING_LEN(str). len must not exceed
the capacity of str.
rb_str_modify(VALUE str) ::
Prepares a Ruby string to modify. If str is not modifiable, this
function raises an exception, or if the buffer of str is shared,
this function allocates new buffer to make it unshared. Always
you MUST call this function before modifying the contents using
RSTRING_PTR and/or rb_str_set_len.
==== Array Functions
rb_ary_new() ::