歯医者。治療はほぼ終わったんですが、歯石が溜まってたりするのでこんどはそっち。
しかも今日の一回では終わらなかったという…
今日一番の話題はこれですかね。
Microsoft makes source code for MS-DOS and Word for Windows available to public - The Official Microsoft Blog - Site Home - TechNet Blogs
反響も色々
Microsoft makes source code for MS-DOS and Word for Windows available to public | Hacker News
Microsoft makes source code for MS-DOS and Word for Windows available to public! : programming
はてなブックマーク - マイクロソフト、「MS-DOS」と「Word for Windows」のソースコード公開。コンピュータ歴史博物館への寄贈で － Publickey
Microsoft makes source code for MS-DOS and Word for Windows available to public - The Official Microsoft Blog - Site Home - TechNet Blogs
On Tuesday, we dusted off the source code for early versions of MS-DOS and Word for Windows. With the help of the
Computer History Museum, we are making this code available to the public for the first time.
The museum has done an excellent job of curating some of the most significant historical software programs in
computing history. As part of this ongoing project, the museum will make available two of the most widely used
software programs of the 1980’s, MS DOS 1.1 and 2.0 and Microsoft Word for Windows 1.1a, to help future
generations of technologists better understand the roots of personal computing.
Computer History Museum | Press | Computer History Museum Makes Historic MS-DOS and Word for Windows Source Code Available to the Public
んで
Computer History Museum | @CHM : Microsoft MS-DOS early source code
を見てたら
Computer History Museum | @CHM : Microsoft MS-DOS early source code
Other historical source code releases in this series include IBM’s APL programming language, Apple II DOS,
Adobe’s Photoshop, Apple Macpaint/QuickDraw, and Microsoft’s Word for Windows. If you would like us to do
more of this, please consider supporting the museum’s efforts by making a donation. We are a 501(c)3
non-profit organization.
IBM's APL programming language とか。
そういやあ 360用のAPLのソースコードとかどこかで見たような…ってここだったのか?
Computer History Museum | @CHM : The APL Programming Language Source Code
Computer History Museum | @CHM : The APL Programming Language Source Code
Thousands of programming languages were invented in the first 50 years of the age of computing. Many of them
were similar, and many followed a traditional, evolutionary path from their predecessors.
But some revolutionary languages had a slant that differentiated them from their more general-purpose brethren.
LISP was for list processing. SNOBOL was for string manipulation. SIMSCRIPT was for simulation. And APL was for
mathematics, with an emphasis on array processing.
(略)
With the permission of IBM, the Computer History Museum is pleased to make available the source code to the
1969-1972 “XM6” version of APL for the System/360 for non-commercial use.
The text file contains 37,567 lines, which includes code, macros, and global definitions. The 90 individual
files are separated by ‘./ ADD” commands. To access this material, you must agree to the terms of the license
displayed here, which permits only non-commercial use and does not give you the right to license it to third
parties by posting copies elsewhere on the web.
そういやこっちのAPLソースコード読みも中途半端に放り出してるなあ
(いちおー360のアセンブリ言語は(ある程度は)わかる)
koie blog : awkのフィールド参照について
lex.cをみるとなぜか$NFは$(NF)として扱われているが、これは /* very special */ とコメントがかいてあるが、意味は理解できなかった。
というので覗いてみたw
case '$':
/* BUG: awkward, if not wrong */
c = gettok(&buf, &bufsize);
if (isalpha(c)) {
if (strcmp(buf, "NF") == 0) { /* very special */
unputstr("(NF)");
RET(INDIRECT);
}
c = peek();
if (c == '(' || c == '[' || (infunc && isarg(buf) >= 0)) {
unputstr(buf);
RET(INDIRECT);
}
yylval.cp = setsymtab(buf, "", 0.0, STR|NUM, symtab);
RET(IVAR);
} else if (c == 0) { /* */
SYNTAX( "unexpected end of input after $" );
RET(';');
} else {
unputstr(buf);
RET(INDIRECT);
}
case '}':
確かにあるなあ。very special。
なんとなーく NF のあとに二項演算子が来るようなパターン。
たとえば $NF-1 みたいのに対処するためのような気がするけどどうなんだろ。
関数呼び出しと配列要素参照は、その名前で表をひいちゃいけない(setesymtab(...)を呼び出す)
から。ですかね。
関数の引数(≒ローカル変数)もそういうことでしょう。
