{"id":44,"date":"2022-05-11T18:07:00","date_gmt":"2022-05-11T09:07:00","guid":{"rendered":"https:\/\/hitechs.co.jp\/contents\/?post_type=blog&p=44"},"modified":"2025-01-21T18:08:47","modified_gmt":"2025-01-21T09:08:47","slug":"c-cstring-%e6%96%87%e5%ad%97%e5%88%97%e6%af%94%e8%bc%83%e3%81%a3%e3%81%a6%e3%81%a9%e3%82%8c%e3%81%8c%e9%80%9f%e3%81%84%e3%81%ae%ef%bc%9f","status":"publish","type":"blog","link":"https:\/\/hitechs.co.jp\/contents\/blog\/44\/","title":{"rendered":"C++ CString \u6587\u5b57\u5217\u6bd4\u8f03\u3063\u3066\u3069\u308c\u304c\u901f\u3044\u306e\uff1f"},"content":{"rendered":"\n
\n \u306f\u3058\u3081\u307e\u3057\u3066\u3001\u5bcc\u5c71\u30aa\u30d5\u30a3\u30b9\u306e\u5c0f\u5742\u3067\u3059\u3002
\n \u4eca\u5e74\u306e4\u6708\u3067\u5165\u793e11\u5e74\u76ee\u306b\u306a\u308a\u307e\u3057\u305f\u3002
\n \u81ea\u5206\u306f\u307e\u3060\u307e\u3060\u82e5\u3044\u6c17\u6301\u3061\u3067\u3044\u307e\u3059\u304c\u3001\u65b0\u5165\u793e\u54e1\u306e\u65b9\u3092\u898b\u308b\u3068\u6b73\u3092\u611f\u3058\u307e\u3059\u306d…\u3002
\n
\n \u3055\u3066\u3001\u4e45\u3057\u3076\u308a\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u6280\u8853\u30d6\u30ed\u30b0\u306e\u66f4\u65b0\u3067\u3059\u3002
\n \u524d\u56de\u306e\u66f4\u65b0\u304c5\u5e74\u524d\u306e\u3088\u3046\u3067…\u30b9\u30df\u30de\u30bb\u30f3\u3002
\n<\/div>\n
\n
\n \u5fa9\u5e30\u7b2c1\u56de\u76ee\u306e\u30c6\u30fc\u30de\u306f…
\n \u300cC++ CString \u6587\u5b57\u5217\u6bd4\u8f03\u3063\u3066\u3069\u308c\u304c\u901f\u3044\u306e\uff1f\u300d<\/font>\n<\/div>\n
\n
\n Windows\u306e\u30a2\u30d7\u30ea\u958b\u767a\u3067\u3088\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u8a00\u3048\u3070\u300cMFC\u300d\u304c\u601d\u3044\u6d6e\u304b\u3076\u3068\u601d\u3044\u307e\u3059\u3002\uff08\u3082\u3057\u304f\u306fATL\uff09
\n \u66f4\u306b\u305d\u306e\u4e2d\u3067\u3001\u6587\u5b57\u5217\u3092\u6271\u3046\u30af\u30e9\u30b9\u3068\u8a00\u3048\u3070\u300cCString\u300d\u304c\u3042\u308a\u307e\u3059\u306d\u3002
\n \u30b5\u30a4\u30ba\u3092\u6c17\u306b\u305b\u305a\u4ee3\u5165\u3084\u7d50\u5408\u304c\u7c21\u5358\u306b\u3067\u304d\u3001\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3084\u6587\u5b57\u5217\u6bd4\u8f03\u3082\u3067\u304d\u308b\u3068\u3044\u3046\u3001\u81f3\u308c\u308a\u5c3d\u304f\u305b\u308a\u306a\u4fbf\u5229\u30af\u30e9\u30b9\u3067\u3059\u3002
\n
\n \u3068\u3044\u3046\u3053\u3068\u3067\u3001\u4eca\u56de\u306f\u300cCString\u300d\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\n \u3068\u3044\u3063\u3066\u3082\u5168\u90e8\u7d39\u4ecb\u3057\u3066\u3044\u308b\u3068\u65e5\u304c\u66ae\u308c\u308b\u306e\u3067\u300c\u6587\u5b57\u5217\u6bd4\u8f03\u300d\u3001\u66f4\u306b\u306f\u305d\u306e\u300c\u51e6\u7406\u901f\u5ea6\u300d\u306b\u30b9\u30dd\u30c3\u30c8\u3092\u5f53\u3066\u3066\u8a71\u3092\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\n<\/div>\n
\n
\n \u6587\u5b57\u5217\u6bd4\u8f03\u3067\u3088\u304f\u898b\u308b\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u5f62\u3067\u3059\u306d\u3002
\n \n
    \n
  1. CString str1 = _T(\"abc\"<\/font>);<\/li>\n
  2. CString str2 = _T(\"123\"<\/font>);<\/li>\n
  3. <\/li>\n
  4. bool bSame = false;<\/li>\n
  5. if (str1 == str2) {<\/li>\n
  6.   bSame = true;<\/li>\n
  7. }<\/li>\n <\/ol>\n <\/code>\n
    \n
    \n \u4e0a\u8a18\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u3082\u30d7\u30ed\u30b0\u30e9\u30e0\u7684\u306b\u554f\u984c\u306f\u3042\u308a\u307e\u305b\u3093\u3002
    \n \u3057\u304b\u3057\u51e6\u7406\u901f\u5ea6\u306e\u89b3\u70b9\u304b\u3089\u898b\u308b\u3068\u3001\u3082\u3063\u3068\u826f\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u307e\u3059\u3002
    \n
    \n \u3067\u306f\u3069\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u304c\u901f\u3044\u306e\u304b\uff1f
    \n \u691c\u8a3c\u3092\u884c\u3063\u3066\u307f\u305f\u306e\u3067\u3001\u305d\u306e\u7d50\u679c\u3092\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
    \n<\/div>\n
    \n
    \n \u3010\u691c\u8a3c\u5185\u5bb9\u3011<\/u><\/b>\n
    \n \u4ee5\u4e0b\u306e\u6587\u5b57\u5217\u306e\u6bd4\u8f03\u3092 1,000,000\u56de \u884c\u3063\u305f\u901f\u5ea6\u3092\u8a08\u6e2c\u3002
    \n
    \n Vdk4jQnifyheeUVSJMAD2FdUXyCfR9HRTACieCMBVDguC3ALbU
    \n vDK4JqNIFYHEEuvsjmad2fDuxYcFr9hrtacIEcmbvdGUc3alBu
    \n
    \n \u4f7f\u7528\u3057\u305f\u95a2\u6570\u306f\u4ee5\u4e0b\u306e4\u3064\u3002
    \n
      \n
    • Cstring::Compare<\/li>\n
    • Cstring::CompareNoCase<\/li>\n
    • _tcscmp<\/li>\n
    • CString\u306e\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09<\/li>\n <\/ul>\n <\/div>\n<\/div>\n
      \n
      \n \u3010\u691c\u8a3c\u30b3\u30fc\u30c9\u3011<\/u><\/b>\n
      \n \u6bd4\u8f03\u7d50\u679c\u3092bool\u578b\u306e\u5909\u6570\u306b\u4ee3\u5165\u3059\u308b\u3060\u3051\u306e\u30b7\u30f3\u30d7\u30eb\u306a\u30b3\u30fc\u30c9\u3067\u3059\u3002
      \n \u6e2c\u5b9a\u3059\u308b\u95a2\u6570\u4ee5\u5916\u306e\u30b3\u30fc\u30c9\u306f\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3057\u3066\u3044\u307e\u3059\u3002
      \n <\/div>\n \n
        \n
      1. bool bSame = false;<\/li>\n
      2. CString str1 = _T(\"Vdk4jQnifyheeUVSJMAD2FdUXyCfR9HRTACieCMBVDguC3ALbU\"<\/font>);<\/li>\n
      3. CString str2 = _T(\"vDK4JqNIFYHEEuvsjmad2fDuxYcFr9hrtacIEcmbvdGUc3alBu\"<\/font>);<\/li>\n
      4. <\/li>\n
      5. \/\/ \u6e2c\u5b9astart<\/font><\/li>\n
      6. auto start = std::chrono::system_clock::now();<\/li>\n
      7. <\/li>\n
      8. for (int i = 0; i < 1000000; i++) {<\/li>\n
      9.   \/\/bSame = (0 == str1.Compare(str2));<\/font><\/li>\n
      10.   \/\/bSame = (0 == str1.CompareNoCase(str2));<\/font><\/li>\n
      11.   \/\/bSame = (0 == _tcscmp(str1, str2));<\/font><\/li>\n
      12.   bSame = (str1 == str2);<\/li>\n
      13. }<\/li>\n
      14. <\/li>\n
      15. \/\/ \u6e2c\u5b9aend<\/font><\/li>\n
      16. auto end = std::chrono::system_clock::now();<\/li>\n
      17. <\/li>\n
      18. \/\/ \u30df\u30ea\u79d2\u2192\u79d2 \u5909\u63db<\/font><\/li>\n
      19. double dSec = std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count() * 0.001;<\/li>\n
      20. <\/li>\n
      21. \/\/ \u51fa\u529b<\/font><\/li>\n
      22. CString strResult = _T(\"\"<\/font>);<\/li>\n
      23. strResult.Format(_T(\"%lf\"<\/font>), dSec);<\/li>\n
      24. ::AfxMessageBox(strResult);<\/li>\n <\/ol>\n <\/code>\n<\/div>\n
        \n
        \n \u3010\u691c\u8a3c\u7d50\u679c\u3011<\/u><\/b>\n
        \n \u7d50\u8ad6\uff1a_tcscmp\u304c\u4e00\u756a\u901f\u3044
        \n
          \n
        • Cstring::Compare<\/li>0.030\n
        • Cstring::CompareNoCase<\/li>1.380\n
        • _tcscmp<\/li>0.003<\/font>\n
        • CString\u306e\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09<\/li>0.037\n <\/ul>\n   \u203b5\u56de\u8a08\u6e2c\u3057\u305f\u5e73\u5747\u5024\u3001\u5358\u4f4d\u306f[\u79d2]
          \n
          \n \u4e0a\u8a18\u306e\u7d50\u679c\u3092\u898b\u308b\u3068\u3001\u57fa\u672c\u7684\u306b\u306f\u300c_tcscmp\u300d\u3092\u4f7f\u3046\u306e\u304c\u826f\u3055\u305d\u3046\u3067\u3059\u306d\uff01\n <\/div>\n<\/div>\n
          \n
          \n \u3010Tips\u3011<\/u><\/b>\n
          \n \u4eca\u56de\u306e\u901f\u5ea6\u8a08\u6e2c\u306b\u7528\u3044\u305f\u30e9\u30a4\u30d6\u30e9\u30ea\u300cstd::chrono\u300d\u3092\u7c21\u5358\u306b\u7d39\u4ecb\u3057\u3066\u304a\u304d\u307e\u3059\u3002
          \n C++11\u304b\u3089\u5c0e\u5165\u3055\u308c\u305f\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3001\u73fe\u5728\u6642\u523b\u306e\u53d6\u5f97\u3084\u6642\u9593\u8a08\u6e2c\u304c\u3067\u304d\u307e\u3059\u3002
          \n
          \n \u4ee5\u4e0b\u306f\u51e6\u7406\u6642\u9593\u3092\u8a08\u6e2c\u3059\u308b\u6642\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002
          \n \n
            \n
          1. auto start = std::chrono::system_clock::now();<\/li>\n
          2. \/\/ \u3053\u306e\u9593\u306b\u6e2c\u5b9a\u3057\u305f\u3044\u51e6\u7406\u3092\u66f8\u304f<\/font><\/li>\n
          3. auto end = std::chrono::system_clock::now();<\/li>\n
          4. <\/li>\n
          5. \/\/ \u51e6\u7406\u6642\u9593\u3092\u53d6\u5f97\uff08\u30df\u30ea\u79d2\u2192\u79d2\u306b\u5909\u63db\uff09<\/font><\/li>\n
          6. double dSec = std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count() * 0.001;<\/li>\n <\/ol>\n <\/code>\n
            \n \u5fdc\u7528\u3059\u308c\u3070\u30e9\u30c3\u30d7\u30bf\u30a4\u30e0\u306e\u51fa\u529b\u3082\u3067\u304d\u308b\u306e\u3067\u3001\u305c\u3072\u4f7f\u3063\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01\n <\/div>\n<\/div>\n
            \n
            \n \u4ee5\u4e0a\u3001\u3044\u304b\u304c\u3067\u3057\u305f\u3067\u3057\u3087\u3046\u304b\uff1f
            \n \u3061\u3087\u3063\u3068\u30c6\u30fc\u30de\u304c\u30d4\u30f3\u30dd\u30a4\u30f3\u30c8\u3059\u304e\u305f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u7686\u3055\u3093\u306e\u304a\u5f79\u306b\u7acb\u3066\u308c\u3070\u5e78\u3044\u3067\u3059\u3002
            \n
            \n \u6b21\u56de\u3082\u4e5e\u3046\u3054\u671f\u5f85\u304f\u3060\u3055\u3044\uff01
            \n \u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305fm(_ _)m
            \n<\/div>\n","protected":false},"excerpt":{"rendered":"

            \u306f\u3058\u3081\u307e\u3057\u3066\u3001\u5bcc\u5c71\u30aa\u30d5\u30a3\u30b9\u306e\u5c0f\u5742\u3067\u3059\u3002 \u4eca\u5e74\u306e4\u6708\u3067\u5165\u793e11\u5e74\u76ee\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u81ea\u5206\u306f\u307e\u3060\u307e\u3060\u82e5\u3044\u6c17\u6301\u3061\u3067\u3044\u307e\u3059\u304c\u3001\u65b0\u5165\u793e\u54e1\u306e\u65b9\u3092\u898b\u308b\u3068\u6b73\u3092\u611f\u3058\u307e\u3059\u306d…\u3002 \u3055\u3066\u3001\u4e45\u3057\u3076\u308a\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u6280\u8853\u30d6\u30ed\u30b0\u306e\u66f4\u65b0\u3067\u3059\u3002 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"template":"","format":"standard","blog_category":[4,6,17],"class_list":["post-44","blog","type-blog","status-publish","format-standard","hentry","blog_category-know-how","blog_category-coding","blog_category-c_plusplus"],"acf":[],"_links":{"self":[{"href":"https:\/\/hitechs.co.jp\/contents\/wp-json\/wp\/v2\/blog\/44","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hitechs.co.jp\/contents\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/hitechs.co.jp\/contents\/wp-json\/wp\/v2\/types\/blog"}],"author":[{"embeddable":true,"href":"https:\/\/hitechs.co.jp\/contents\/wp-json\/wp\/v2\/users\/2"}],"version-history":[{"count":1,"href":"https:\/\/hitechs.co.jp\/contents\/wp-json\/wp\/v2\/blog\/44\/revisions"}],"predecessor-version":[{"id":45,"href":"https:\/\/hitechs.co.jp\/contents\/wp-json\/wp\/v2\/blog\/44\/revisions\/45"}],"wp:attachment":[{"href":"https:\/\/hitechs.co.jp\/contents\/wp-json\/wp\/v2\/media?parent=44"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/hitechs.co.jp\/contents\/wp-json\/wp\/v2\/blog_category?post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}