{"id":728,"date":"2012-08-05T18:29:05","date_gmt":"2012-08-06T01:29:05","guid":{"rendered":"http:\/\/h2plus.biz\/hiromitsu\/?p=728"},"modified":"2018-08-06T14:40:22","modified_gmt":"2018-08-06T21:40:22","slug":"boostproperty_tree%e3%81%a7%e6%97%a5%e6%9c%ac%e8%aa%9e%e3%82%92%e5%90%ab%e3%82%80json%e3%81%8c%e6%96%87%e5%ad%97%e5%8c%96%e3%81%91%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/h2plus.biz\/hiromitsu\/entry\/728","title":{"rendered":"boost::property_tree\u3067\u65e5\u672c\u8a9e\u3092\u542b\u3080JSON\u304c\u6587\u5b57\u5316\u3051\u3059\u308b"},"content":{"rendered":"<p>\u4e45\u3057\u3076\u308a\u306bC++\u30cd\u30bf\u3002JSON\u3092\u751f\u6210\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092C++\u3067\u66f8\u3053\u3046\u306a\u3093\u3066\u4eba\u304c\u305d\u3082\u305d\u3082\u3044\u306a\u3044\u6c17\u3082\u3059\u308b\u304c\u3001<a href=\"https:\/\/www.boost.org\/doc\/libs\/1_50_0\/doc\/html\/property_tree\/reference.html#header.boost.property_tree.json_parser_hpp\"><code>boost::property_tree::write_json()<\/code><\/a>\u3092\u4f7f\u3046\u3068\u7c21\u5358\u306bJSON\u51fa\u529b\u304c\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\r\n#include &amp;amp;lt;iostream&amp;amp;gt;\r\n#include &amp;amp;lt;sstream&amp;amp;gt;\r\n#include &amp;amp;lt;boost\/property_tree\/json_parser.hpp&amp;amp;gt;\r\nusing namespace std;\r\n\r\nint main(int argc, char *argv[])\r\n{\r\n\tif(argc &amp;amp;lt; 2)\r\n\t{\r\n\t\tcerr &amp;amp;lt;&amp;amp;lt; &amp;amp;quot;Usage: &amp;amp;quot; &amp;amp;lt;&amp;amp;lt; argv[0] &amp;amp;lt;&amp;amp;lt; &amp;amp;quot; message&amp;amp;quot; &amp;amp;lt;&amp;amp;lt; endl;\r\n\t\treturn 1;\r\n\t}\r\n\r\n\tboost::property_tree::ptree pt;\r\n\tpt.put(&amp;amp;quot;message&amp;amp;quot;, argv[1]);\r\n\tboost::property_tree::write_json(cout, pt, false);\r\n\treturn 0;\r\n}\r\n<\/pre>\n<p><!--more--><br \/>\n\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u5f15\u6570\u306b<code>hello<\/code>\u3092\u6e21\u3057\u3066\u51fa\u529b\u3055\u308c\u305fJSON\u304c\u3053\u3061\u3089\u3002<\/p>\n<pre>\n$ g++ -I\/usr\/include\/boost_1_50_0 -o write_json main.cpp\n$ .\/write_json hello\n{\"message\":\"hello\"}\n<\/pre>\n<p>\u3067\u306f\u5f15\u6570\u306b\u65e5\u672c\u8a9e\u3092\u6e21\u3059\u3068\u3069\u3046\u306a\u308b\u304b\u3002<\/p>\n<pre>\n$ .\/write_json \u307b\u3052\n{\"message\":\"\\u00E3\\u0081\\u00BB\\u00E3\\u0081\\u0092\"}\n<\/pre>\n<p>\u30b7\u30a7\u30eb\u5b9f\u884c\u74b0\u5883\u306e\u30ed\u30b1\u30fc\u30eb\u306f<code>en_US.UTF-8<\/code>\u3002\u65e5\u672c\u8a9e\u90e8\u5206\u306f1\u30d0\u30a4\u30c8\u305a\u3064<code>\\u00XX<\/code>\u3068\u3044\u3046\u5f62\u306b\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u3053\u306eJSON\u3092Chrome Development Tool\u3067\u8aad\u307f\u8fbc\u307e\u305b\u3066\u307f\u308b\u3002<br \/>\n<img src=\"http:\/\/h2plus.biz\/hiromitsu\/wp-content\/uploads\/2012\/08\/GarbledJSON.gif\" alt=\"GarbledJSON\" title=\"\u6587\u5b57\u5316\u3051\u767a\u751f\" class=\"size-full wp-image-731\" \/><br \/>\n\u7d20\u6575\u306b\u6587\u5b57\u5316\u3051\u3002<\/p>\n<p><a href=\"http:\/\/www.json.org\/\">JSON\u306e\u4ed5\u69d8<\/a>\u3067\u6587\u5b57\u5217\u578b\u306f<\/p>\n<blockquote><p>A string is a sequence of zero or more Unicode characters, wrapped in double quotes, using backslash escapes. <\/p><\/blockquote>\n<p>\u3068\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001UTF-8\u304b\u3089\u4e00\u65e6Unicode\u306b\u5909\u63db\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<a href=\"http:\/\/php.net\/manual\/en\/function.json-encode.php\">PHP\u306e<code>json_encode()<\/code><\/a>\u306a\u3093\u304b\u306f\u3001\u5165\u529b\u306e\u6587\u5b57\u30b3\u30fc\u30c9\u304cUTF-8\u306b\u9650\u5b9a\u3057\u3066\u3044\u308b\u3082\u306e\u306e\u3001\u5185\u90e8\u3067Unicode\u5316\u3057\u3066\u304b\u3089JSON\u30a8\u30f3\u30b3\u30fc\u30c9\u3092\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u3088\u3046\u3060\u3002<\/p>\n<p>\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u307e\u305a\u306fUTF-8\u304b\u3089Unicode\u3078\u5909\u63db\u3059\u308b\u51e6\u7406\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002\u307e\u305f\u3001\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u5217\uff08<code>std::string<\/code>\uff09\u3068\u30ef\u30a4\u30c9\u6587\u5b57\u5217\uff08<code>std::wstring<\/code>\uff09\u3068\u306e\u5909\u63db\u3082\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u9762\u5012\u3067\u306f\u3042\u3063\u305f\u304c\u3001\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e<code>codecvt<\/code>\u3092\u4f7f\u3048\u3070\u306a\u3093\u3068\u304b\u306a\u308a\u305d\u3046\u3060\u3063\u305f\u306e\u3067\u3001UTF-8\u304b\u3089Unicode\u3078\u306e\u5909\u63db\u3092\u884c\u3046<code>widen()<\/code>\u95a2\u6570\u3068\u3001\u305d\u306e\u9006\u5909\u63db\u3092\u884c\u3046<code>narrow()<\/code>\u95a2\u6570\uff08JSON\u51fa\u529b\u306e\u76ee\u7684\u3067\u306f\u306a\u304f\u3066\u3082\u3044\u3044\u3093\u3060\u3051\u3069\u5bfe\u79f0\u6027\u306e\u305f\u3081\uff09\u3092\u63d0\u4f9b\u3059\u308b<code>CodeCvt<\/code>\u30af\u30e9\u30b9\u3092\u4f5c\u3063\u3066\u307f\u305f\u3002<\/p>\n<pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\r\n#include &amp;amp;lt;iostream&amp;amp;gt;\r\n#include &amp;amp;lt;stdexcept&amp;amp;gt;\r\n#include &amp;amp;lt;vector&amp;amp;gt;\r\n#include &amp;amp;lt;string&amp;amp;gt;\r\n#include &amp;amp;lt;cstring&amp;amp;gt;\r\n#include &amp;amp;lt;locale&amp;amp;gt;\r\n#include &amp;amp;lt;boost\/property_tree\/json_parser.hpp&amp;amp;gt;\r\nusing namespace std;\r\n\r\nclass CodeCvt\r\n{\r\npublic:\r\n\texplicit CodeCvt(const char *locale=&amp;amp;quot;en_US.UTF-8&amp;amp;quot;)\r\n\t: locale_(locale), codecvt_(use_facet&amp;amp;lt;codecvt_type&amp;amp;gt;(locale_)) {}\r\n\r\n\twstring widen(const string &amp;amp;amp;s)\r\n\t{\r\n\t\tconst char *fb = s.data();\r\n\t\tconst char *fe = fb+s.size();\r\n\t\tconst char *fn;\r\n\t\tvector&amp;amp;lt;wchar_t&amp;amp;gt; ws(s.size());\r\n\t\twchar_t *tb = &amp;amp;amp;ws.front();\r\n\t\twchar_t *te = tb+ws.size();\r\n\t\twchar_t *tn;\r\n\t\tmbstate_t st;\r\n\t\tbzero(&amp;amp;amp;st, sizeof(st));\r\n\r\n\t\tconst codecvt_base::result res = codecvt_.in(st, fb, fe, fn, tb, te, tn);\r\n\t\tassert_result(res, fn, fe);\r\n\t\treturn wstring(tb, tn);\r\n\t}\r\n\r\n\tstring narrow(const wstring &amp;amp;amp;ws)\r\n\t{\r\n\t\tconst wchar_t *fb = ws.data();\r\n\t\tconst wchar_t *fe = fb+ws.size();\r\n\t\tconst wchar_t *fn;\r\n\t\tvector&amp;amp;lt;char&amp;amp;gt; s(ws.size()*4);\r\n\t\tchar *tb = &amp;amp;amp;s.front();\r\n\t\tchar *te = tb+s.size();\r\n\t\tchar *tn;\r\n\t\tmbstate_t st;\r\n\t\tbzero(&amp;amp;amp;st, sizeof(st));\r\n\r\n\t\tconst codecvt_base::result res = codecvt_.out(st, fb, fe, fn, tb, te, tn);\r\n\t\tassert_result(res, fn, fe);\r\n\t\treturn string(tb, tn);\r\n\t}\r\n\r\nprivate:\r\n\ttemplate&amp;amp;lt;class CharT&amp;amp;gt;\r\n\tstatic void assert_result(codecvt_base::result res, const CharT *fn, const CharT *fe)\r\n\t{\r\n\t\tswitch(res)\r\n\t\t{\r\n\t\t\tcase codecvt_base::ok:\r\n\t\t\t\tif(fn != fe)\r\n\t\t\t\t{\r\n\t\t\t\t\tthrow invalid_argument(&amp;amp;quot;Conversion failure&amp;amp;quot;);\r\n\t\t\t\t}\r\n\t\t\t\tbreak;\r\n\t\t\tcase codecvt_base::partial:\r\n\t\t\t\tthrow invalid_argument(&amp;amp;quot;partial&amp;amp;quot;);\r\n\t\t\tcase codecvt_base::error:\r\n\t\t\t\tthrow invalid_argument(&amp;amp;quot;error&amp;amp;quot;);\r\n\t\t\tcase codecvt_base::noconv:\r\n\t\t\t\tthrow invalid_argument(&amp;amp;quot;noconv&amp;amp;quot;);\r\n\t\t}\r\n\t}\r\n\r\n\ttypedef codecvt&amp;amp;lt;wchar_t, char, mbstate_t&amp;amp;gt; codecvt_type;\r\n\tconst locale locale_;\r\n\tconst codecvt_type &amp;amp;amp;codecvt_;\r\n};\r\n<\/pre>\n<p><code>mbstate_t<\/code>\u578b\u306e\u5909\u6570<code>st<\/code>\u3092<code>bzero()<\/code>\u3084<code>memset()<\/code>\u306a\u3069\u3067\u521d\u671f\u5316\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u3001<code>codecvt_.in()<\/code>\u3084<code>codecvt_.out()<\/code>\u306e\u4e2d\u3067\u4e0d\u6e2c\u306e\u4e8b\u614b\u304c\u8d77\u3053\u308b\u306e\u3067\u6ce8\u610f\uff08\u5b9f\u969b\u30c6\u30b9\u30c8\u4e2d\u306b\u7121\u9650\u30eb\u30fc\u30d7\u306b\u30cf\u30de\u3063\u3066\u30c7\u30d0\u30c3\u30ac\u3067\u8ffd\u3044\u304b\u3051\u308b\u7fbd\u76ee\u306b\u306a\u3063\u305f\uff09\u3002<\/p>\n<p><code>main()<\/code>\u95a2\u6570\u5074\u3067\u306f\u3001<code>ptree<\/code>\u306e\u4ee3\u308f\u308a\u306b<code>wptree<\/code>\u3092\u4f7f\u3044\u3001\u51fa\u529b\u3082<code>cout<\/code>\u3067\u306f\u306a\u304f<code>wcout<\/code>\u3092\u4f7f\u3046\u3088\u3046\u306b\u3059\u308b\u3060\u3051\u3002<\/p>\n<pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\r\nint main(int argc, char *argv[])\r\n{\r\n\ttry\r\n\t{\r\n\t\tCodeCvt cvt;\r\n\t\tboost::property_tree::wptree pt;\r\n\t\tpt.put(L&amp;amp;quot;message&amp;amp;quot;, cvt.widen(argv[1]));\r\n\t\tboost::property_tree::write_json(wcout, pt, false);\r\n\t\treturn 0;\r\n\t}\r\n\tcatch(const exception &amp;amp;amp;e)\r\n\t{\r\n\t\tcerr &amp;amp;lt;&amp;amp;lt; e.what() &amp;amp;lt;&amp;amp;lt; endl;\r\n\t\treturn 1;\r\n\t}\r\n}\r\n<\/pre>\n<p>\u3055\u3063\u305d\u304f\u5b9f\u884c\u3057\u3066\u307f\u308b\u3002<\/p>\n<pre>\n$ .\/write_json \u307b\u3052\n{\"message\":\"\\u307B\\u3052\"}\n<\/pre>\n<p>\u3061\u3083\u3093\u3068Unicode\u306e\u30d0\u30a4\u30c8\u30b7\u30fc\u30b1\u30f3\u30b9\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u308f\u304b\u308b\u3002<\/p>\n<p>\u540c\u3058\u3088\u3046\u306bChrome Development Tool\u3067\u8aad\u307f\u8fbc\u307e\u305b\u3066\u307f\u308b\u3002<br \/>\n<img loading=\"lazy\" width=\"355\" height=\"130\" src=\"http:\/\/h2plus.biz\/hiromitsu\/wp-content\/uploads\/2012\/08\/FixedJSON.gif\" alt=\"FixedJSON\" title=\"\u6587\u5b57\u5316\u3051\u89e3\u6d88\" class=\"size-full wp-image-737\" srcset=\"https:\/\/h2plus.biz\/hiromitsu\/wp-content\/uploads\/2012\/08\/FixedJSON.gif 355w, https:\/\/h2plus.biz\/hiromitsu\/wp-content\/uploads\/2012\/08\/FixedJSON-300x109.gif 300w\" sizes=\"(max-width: 355px) 100vw, 355px\" \/><\/p>\n<p>\u4eca\u5ea6\u306f\u3061\u3083\u3093\u3068\u300c\u307b\u3052\u300d\u3068\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002<\/p>\n<p><code>CodeCvt<\/code>\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5f15\u6570\u3067\u5225\u306e\u6587\u5b57\u30b3\u30fc\u30c9\uff08\u4f8b\u3048\u3070<code>ja_JP.EUC-JP<\/code>\uff09\u3092\u6e21\u305b\u3070\u3001UTF-8\u4ee5\u5916\u306e\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u5217\u304b\u3089\u3067\u3082JSON\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306f\u305a\u3002<\/p>\n<p>\u30bd\u30fc\u30b9\u306f<a href=\"https:\/\/gist.github.com\/bow-fujita\/3282693\">Gist<\/a>\u306b\u7f6e\u3044\u3068\u3044\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e45\u3057\u3076\u308a\u306bC++\u30cd\u30bf\u3002JSON\u3092\u751f\u6210\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092C++\u3067\u66f8\u3053\u3046\u306a\u3093\u3066\u4eba\u304c\u305d\u3082\u305d\u3082\u3044\u306a\u3044\u6c17\u3082\u3059\u308b\u304c\u3001boost::property_tree::write_json()\u3092\u4f7f\u3046\u3068\u7c21\u5358\u306bJSON\u51fa\u529b\u304c\u3067\u304d\u308b\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[152],"tags":[250,249,247,253,246,248,251,252],"_links":{"self":[{"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/posts\/728"}],"collection":[{"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/comments?post=728"}],"version-history":[{"count":2,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/posts\/728\/revisions"}],"predecessor-version":[{"id":1007,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/posts\/728\/revisions\/1007"}],"wp:attachment":[{"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/media?parent=728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/categories?post=728"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/tags?post=728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}