{"author_url":"https://blog.hatena.ne.jp/rsky/","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","author_name":"rsky","blog_url":"https://blog.r-sky.jp/","version":"1.0","blog_title":"\u8b83\u5bb9\u65e5\u8a18","height":"190","url":"https://blog.r-sky.jp/entry/20070409/1176127407","description":"\u4ee5\u524d\u306e\u30a8\u30f3\u30c8\u30ea\u3067 FreeBSD \u306e PHP \u3067\u306f log(64) \u306e\u7d50\u679c float(6) \u3092\u6574\u6570\u306b\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u3068\u306a\u305c\u304b int(5) \u306b\u306a\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u66f8\u304d\u307e\u3057\u305f\u3002\u4eca\u56de\u306f\u305d\u306e\u7d9a\u304d\u3002 \u307e\u305a PHP \u306e log \u95a2\u6570\u306f ext/standard/math.c \u306b\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u5f15\u6570\u304c\u4e8c\u3064\u306e\u5834\u5408\u306f RETURN_DOUBLE(log(Z_DVAL_PP(num)) / log(Z_DVAL_PP(base)));\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002 \u306e\u516c\u5f0f\u901a\u308a\u3067\u3059\u306d\u3002 \u3053\u308c\u3092\u57fa\u306b C \u3067\u3044\u308d\u3044\u308d\u8a66\u3057\u305f\u3068\u3053\u308d\u3001\u3069\u3046\u3084\u3089 x86 \u7cfb\u30d7\u30ed\u30bb\u30c3\u30b5\u306e\u6d6e\u52d5\u5c0f\u6570\u70b9\u6f14\u7b97\u306e\u7656 (\u30d0\u30b0\u304b\u4ed5\u69d8\u304b\u306f\u77e5\u3089\u306a\u3044) \u304c\u539f\u56e0\u306e\u3088\u3046\u306a\u5370\u8c61\u3092\u53d7\u3051\u307e\u3057\u2026","title":" \u6d6e\u52d5\u5c0f\u6570\u70b9\u306e\u7f60?","published":"2007-04-09 23:03:27","categories":["PHP","FreeBSD","tech"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.r-sky.jp%2Fentry%2F20070409%2F1176127407\" title=\" \u6d6e\u52d5\u5c0f\u6570\u70b9\u306e\u7f60? - \u8b83\u5bb9\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","image_url":null,"width":"100%"}