November 2016
Beginner to intermediate
816 pages
19h 58m
Japanese
Content preview from Cクイックリファレンス 第2版
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326
17
章 関数の機能別まとめ
●
文字分類と大文字小文字変換関数
●
ロケール依存文字列変換（
strcoll()
と
wcscoll()
）
●
日付と時刻書式（
strftime()
と
wcsftime()
）
●
数字列の変換
●
マルチバイト文字とワイド文字間の変換
17.13
非局所ジャンプ
Cの
goto
文は関数内でのみジャンプする。ヘッダsetjmp.hはより柔軟性がある、プログ
ラムの任意の地点へジャンプできる一対の関数を宣言する。表17-27にその関数を示す。
表17-27 非局所ジャンプ関数
目的 関数
longjmp()
関数のためにジャンプ目標として現在の実行文脈を保存する
setjmp()
setjmp()
関数への呼び出しで保存されたプログラム文脈にジャンプする
longjmp()
関数形式マクロ
setjmp()
を呼び出すと型
jmp_buf
の引数に、プログラムにはその地点へ
の目印となる値を格納する。
jmp_buf
オブジェクトは現在の実行状態のすべての必要な部
分（レジスタとスタックを含む）を保持する。
jmp_buf
オブジェクトを
longjmp()
に渡すと、
longjmp()
は保存していた状態を復元し、プログラムは、以前の
setjmp()
呼び出しの次の
個所から実行を続ける。
longjmp()
呼び出しは、
setjmp()
を呼び出した関数が返ってから
後でなければならない。さらに、
setjmp()
を呼び出した関数の自動記憶域期間変数のいず
れかが
setjmp()
呼び出し後に変更されていると（
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.