{"id":4974,"date":"2018-11-21T09:54:09","date_gmt":"2018-11-21T01:54:09","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=4974"},"modified":"2018-11-21T09:54:23","modified_gmt":"2018-11-21T01:54:23","slug":"%e6%95%99%e7%a8%8b%e4%bd%bf%e7%94%a8%e6%b3%9b%e5%9e%8b%e4%b8%ba-delphi-%e6%8f%90%e4%be%9b%e4%b8%80%e4%b8%aa%e4%bd%8d%e8%bf%90%e7%ae%97%e7%9a%84%e6%a8%a1%e6%9d%bf%e6%94%af%e6%8c%81","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=4974","title":{"rendered":"[\u6559\u7a0b]\u4f7f\u7528\u6cdb\u578b\u4e3a Delphi \u63d0\u4f9b\u4e00\u4e2a\u4f4d\u8fd0\u7b97\u7684\u6a21\u677f\u652f\u6301"},"content":{"rendered":"

\u8bf4\u8d77\u6765\uff0cDelphi\u00a0\u81ea 2009\u00a0\u5f15\u548c\u6cdb\u578b\u5df2\u7ecf\u5f88\u957f\u65f6\u95f4\u4e86\uff0c\u800c Delphi \u7f3a\u5c11\u4f4d\u57df\u4e5f\u5df2\u7ecf\u66f4\u4e45\u8fdc\u4e86\uff0c\u65e9\u5728\u8fdc\u53e4\u4e4b\u524d\u2026\u2026\uff0c\u626f\u8fdc\u4e86:)<\/p>\n

\u65b0\u7248\u7684 Delphi\u00a0\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7c7b\uff0c\u540d\u5b57\u53eb TBits\uff0c\u597d\u5427\uff0c\u987e\u540d\u601d\u610f\uff0c\u53ef\u662f\u4e3a\u4ec0\u4e48\u662f\u7c7b\u5440\uff1f\u8fd9\u610f\u5473\u7740\u6211\u4eec\u6ca1\u6cd5\u50cfC++\u4e00\u6837\u5c06\u5b83\u5d4c\u5165\u5230\u7ed3\u6784\u4f53\u91cc\uff0c\u5982\u679c\u4f60\u80fd\uff0c\u4f60\u5c31\u4e0a\u5929\u4e86@<\/p>\n

\u597d\u5427\uff0c\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e00\u76ee\u7684\uff0c\u672c\u7740\u4e3a\u4e86\u4eba\u7c7b\u548c\u5e73\u7684\u601d\u60f3\uff0c\u6240\u4ee5\u63d0\u4f9b\u4e86 TQBits\u00a0\u7684\u6a21\u677f\u5c01\u88c5\uff0c\u51e0\u53e5\u4ee3\u7801\uff1a<\/p>\n

\u9996\u5148\u770b\u58f0\u660e\uff1a<\/p>\n

TQBits < T >= record \/\/\r\nprivate\r\nvar\r\n  Data: T;\r\npublic\r\n  function GetBit(const AIndex: Integer): Boolean;inline;\r\n  procedure SetBit(const AIndex: Integer; const Value: Boolean);inline;\r\n  property Bits[const AIndex: Integer]: Boolean read GetBit write SetBit;default;\r\nend;<\/pre>\n
\u63a5\u4e0b\u6765\u770b\u5b9e\u73b0\uff1a<\/p>\n
{ TQBits<T> }\r\n\r\nfunction TQBits<T>.GetBit(const AIndex: Integer): Boolean;\r\nbegin\r\n  Result := (PByte(@Data)[AIndex shr 3] and (1 shl (AIndex and $7))) <> 0;\r\nend;\r\n\r\nprocedure TQBits<T>.SetBit(const AIndex: Integer; const Value: Boolean);\r\nvar\r\n  p: PByte;\r\nbegin\r\n  p := PByte(IntPtr(@Data) + (AIndex shr 3));\r\n  if Value then\r\n    p^ := p^ or (1 shl (AIndex and $7))\r\n  else\r\n    p^ := p^ and (not(1 shl (AIndex and $7)));\r\nend;<\/pre>\n
\u6700\u540e\u5f53\u7136\u662f\u6d4b\u8bd5\u7528\u4f8b\uff1a<\/p>\n
procedure Test;\r\nvar\r\n  B8:TQBits<Byte>;\r\n  B16:TQBits<Word>;\r\n  B24:TQBits<array[0..2] of Byte>;\r\n  B32:TQBits<Integer>;\r\nbegin\r\n  B8.Data:=0;\r\n  B8[0]:=true;\r\n  B8[7]:=true;\r\n  assert(Sizeof(B8)=1);\r\n  B16.Data:=0;\r\n  B16[8]:=true;\r\n  assert(SizeOf(B16)=2);\r\n  FillChar(B24,SizeOf(B24),0);\r\n  B24[23]:=true;\r\n  assert(SizeOf(B24)=3);\r\n  B32.Data:=0;\r\n  B32[31]:=true;\r\n  assert(SizeOf(B32)=4);\r\nend;<\/pre>\n
\u86cb\u626f\u5b8c\u4e86\uff0c\u5927\u5bb6\u6709\u5ab3\u5987\u62b1\u5ab3\u5987\uff0c\u6ca1\u5ab3\u5987\u62b1\u5927\u817f\u53bb\u5427\u3002\u8fd9\u4e2a\u4f8b\u5b50\u5b9e\u9645\u4e0a\u6f14\u793a\u7684\u8fd8\u6709\u53e6\u4e00\u4e2a\u76ee\u7684\uff0c\u5c31\u662f\u7ed9\u5927\u5bb6\u63d0\u4f9b\u4e0b\u6cdb\u578b\u4f7f\u7528\u7684\u53e6\u4e00\u79cd\u601d\u8def\uff0c\u6b63\u5e38 Delphi\u00a0\u4e2d\u7684\u6cdb\u578b\u7c7b\u578b\u652f\u6301\u80fd\u529b\u5b9e\u5728\u662f\u6709\u9650\uff0c\u4f46\u6211\u4eec\u53ef\u4ee5\u5728\u5b9e\u73b0\u7684\u65f6\u5019\uff0c\u5c06\u5176\u7c7b\u578b\u5177\u4f53\u5316\uff0c\u53d6\u5730\u5740\uff0c\u8f6c\u7c7b\u578b\u6307\u9488\uff0c\u7136\u540e\u518d\u64cd\u4f5c\u3002\u770b\u4e0d\u61c2\u7684\u5c31\u7b97\u4e86\uff0c\u626f\u4e4e~~~<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8bf4\u8d77\u6765\uff0cDelphi\u00a0\u81ea 2009\u00a0\u5f15\u548c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[8,603],"tags":[761,760],"class_list":["post-4974","post","type-post","status-publish","format-standard","hentry","category-delphi","category-603","tag-761","tag-760"],"views":3794,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/4974","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4974"}],"version-history":[{"count":2,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/4974\/revisions"}],"predecessor-version":[{"id":4976,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/4974\/revisions\/4976"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}