{"id":1569,"date":"2024-11-29T13:30:58","date_gmt":"2024-11-29T04:30:58","guid":{"rendered":"https:\/\/avancesys.co.jp\/laboratory\/?post_type=article&p=1569"},"modified":"2024-11-29T13:30:58","modified_gmt":"2024-11-29T04:30:58","slug":"%e7%ac%ac5%e5%9b%9e-misra-c-%ef%bd%9e%e3%83%ab%e3%83%bc%e3%83%abno-19-4%e3%81%ae%e8%a7%a3%e8%aa%ac%ef%bd%9e","status":"publish","type":"article","link":"https:\/\/www.avancesys.co.jp\/laboratory\/article\/%e7%ac%ac5%e5%9b%9e-misra-c-%ef%bd%9e%e3%83%ab%e3%83%bc%e3%83%abno-19-4%e3%81%ae%e8%a7%a3%e8%aa%ac%ef%bd%9e\/","title":{"rendered":"\u7b2c5\u56de MISRA-C \uff5e\u30eb\u30fc\u30ebNo.19.4\u306e\u89e3\u8aac\uff5e"},"content":{"rendered":"\n

<\/p>\n\n\n\n

\u7d44\u307f\u8fbc\u307f\u7cfb\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u8a2d\u8a08\u6a19\u6e96\u898f\u683c\u3067\u3042\u308bMISRA-C\u306e\u30eb\u30fc\u30eb\u306e\u4e2d\u304b\u3089\u3001
C\u30de\u30af\u30ed\u306b\u3064\u3044\u3066MISRA-C 2004\u3067\u306f\u5fc5\u8981\u30fb\u63a8\u5968\u30eb\u30fc\u30eb\u304c\u5e7e\u3064\u304b\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u30d4\u30c3\u30af\u30a2\u30c3\u30d7\u3057\u3066\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\u4eca\u56de\u53d6\u308a\u4e0a\u3052\u308b\u30eb\u30fc\u30eb\u306f\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

MISRA-C:2004 \u30eb\u30fc\u30eb\u306e\u5185\u5bb9<\/p><\/blockquote><\/figure>\n\n\n\n

\u30eb\u30fc\u30ebNo.<\/td>19.4<\/td><\/tr>
\u30ab\u30c6\u30b4\u30ea\u30fc<\/td>\u5fc5\u8981<\/td><\/tr>
\u5185\u5bb9<\/td>C\u30de\u30af\u30ed\u306f\u3001\u6ce2\u62ec\u5f27\u3067\u56f2\u307e\u308c\u305f\u521d\u671f\u5316\u5b50\u3001\u5b9a\u6570\u3001\u62ec\u5f27\u3067\u56f2\u307e\u308c\u305f\u5f0f\u3001\u578b\u4fee\u98fe\u5b50\u3001\u8a18\u61b6\u57df\u30af\u30e9\u30b9\u6307\u5b9a\u5b50\u3001do-while-zero\u69cb\u9020\u3060\u3051\u306b\u5c55\u958b\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/td><\/tr>
\u8a73\u7d30<\/td>\u30eb\u30fc\u30eb19.4\u306f\u3001\u30de\u30af\u30ed\u306e\u7528\u9014\uff08\u7f6e\u63db\u7d50\u679c\uff09\u3092\u6b21\u306e6\u7a2e\u985e\u306b\u5236\u9650\u3059\u308b\u3082\u306e\u3067\u3042\u308b\u3002
\u5b9a\u7fa9\u3068\u547c\u3073\u51fa\u3057\u306e\u4e21\u65b9\u3067\u3001\u610f\u56f3\u3069\u304a\u308a\u306e\u7528\u9014\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002
\u3000(1)\u521d\u671f\u5316\u5b50
\u3000(2)\u5b9a\u6570
\u3000\u3000C90 6.1.3\u9805\u306e\u5b9a\u6570\uff08\u6574\u6570\u5b9a\u6570\u3001\u6587\u5b57\u5b9a\u6570\u3001\u5217\u6319\u5b9a\u6570\u306a\u3069\uff09\u3001C90 6.1.4\u9805\u306e\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u3001C90 6.1.8\u9805\u306e\u524d\u51e6\u7406\u6570\u3001\u305d\u308c\u3089\u306b\u7f6e\u63db\u3059\u308b\u7528\u9014\u306e\u30de\u30af\u30ed
\u3000\u3000\uff08\u30a2\u30bb\u30f3\u30d6\u30ea\u8a00\u8a9e\u306a\u3069\u51e6\u7406\u7cfb\u3068\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306b\u4f7f\u3046\u4f4e\u30ec\u30d9\u30eb\u51e6\u7406\u7528\u306e\u6570\u3068\u6587\u5b57\u8868\u73fe\u3078\u306e\u7f6e\u63db\u3082\u542b\u3080\uff09
\u3000(3)\u62ec\u5f27\u3067\u56f2\u307e\u308c\u305f\u5f0f\uff08\u5b9a\u6570\u5f0f\u3092\u542b\u3080\uff09
\u3000(4)\u578b\u4fee\u98fe\u5b50const,volatile,const volatile,volatile const\u3078\u306e\u7f6e\u63db
\u3000(5)\u8a18\u61b6\u57df\u30af\u30e9\u30b9\u6307\u5b9a\u5b50extern,static,auto,register\u3078\u306e\u7f6e\u63db
\u3000(6)do-while-zero\u5f62\u5f0f\u3092\u4f7f\u7528\u3057\u30011\u3064\u53c8\u306f\u305d\u308c\u4ee5\u4e0a\u306e\u6587\u3092\u4fdd\u8b77\u3057\u305f\u30de\u30af\u30ed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

C\u8a00\u8a9e\u306e\u30de\u30af\u30ed\u306b\u95a2\u3059\u308b\u30eb\u30fc\u30eb\u3067\u3059\u3002
\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u4e0a\u3052\u308b\u76ee\u7684\u306a\u3069\u3067\u3001\u3088\u304f\u30de\u30af\u30ed\u3092\u4f7f\u7528\u3059\u308b\u3068\u601d\u3044\u307e\u3059\u3002
\u30de\u30af\u30ed\u3092\u4f7f\u7528\u3059\u308b\u306b\u3042\u305f\u308a\u3001\u30eb\u30fc\u30eb19.4\u304b\u3089\u9038\u8131\u3057\u3066\u3057\u307e\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u306f\u4ee5\u4e0b\u306e\u554f\u984c\u304c\u6f5c\u3093\u3067\u3044\u307e\u3059\u3002
“\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u610f\u56f3\u3069\u304a\u308a\u306b\u30de\u30af\u30ed\u547c\u3073\u51fa\u3057\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u304b\u3001\u7f6e\u63db\u7d50\u679c\u3092\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u554f\u984c\u306a\u304f\u51e6\u7406\u3067\u304d\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u306f\u96e3\u3057\u3044”<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u3010\u88dc\u8db3\u3011\u30de\u30af\u30ed\u3068\u306f\uff1f<\/h2>\n\n\n\n

C\u8a00\u8a9e\u306b\u304a\u3051\u308b\u30de\u30af\u30ed\u3068\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u306e\u6587\u5b57\u5217\u3092\u3042\u3089\u304b\u3058\u3081\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u898f\u5247\u306b\u3057\u305f\u304c\u3063\u3066\u7f6e\u63db\u3059\u308b\u6a5f\u80fd\u306e\u3053\u3068\u3092\u3044\u3044\u307e\u3059\u3002
\u30de\u30af\u30ed\u306b\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u4e2d\u306e\u6587\u5b57\u5217\u3092\u5358\u306b\u6307\u5b9a\u3057\u305f\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5f62\u5f0f\u30de\u30af\u30ed\u3068\u5f15\u6570\u3092\u7528\u3044\u3066\u95a2\u6570\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3059\u308b\u95a2\u6570\u5f62\u5f0f\u30de\u30af\u30ed\u306e\uff12\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5f62\u5f0f\u30de\u30af\u30ed\u306e\u4f8b
“#define NUM 3″\u306e\u3088\u3046\u306b\u3001”#define \u6587\u5b57\u52171 \u6587\u5b57\u52172″\u3067\u5b9a\u7fa9\u3057\u307e\u3059\u3002
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5f62\u5f0f\u30de\u30af\u30ed\u5b9a\u7fa9\u3057\u3066\u304a\u304f\u3068\u3001\u5024\u3092\u5909\u66f4\u3057\u305f\u304f\u306a\u3063\u305f\u6642\u306b\u5b9a\u7fa9\u5024\u3060\u3051\u3092\u5909\u66f4\u3059\u308c\u3070\u3059\u3079\u3066\u306b\u53cd\u6620\u3055\u308c\u308b\u305f\u3081\u3001\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u3066\u4fee\u6b63\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u30fb\u95a2\u6570\u5f62\u5f0f\u30de\u30af\u30ed\u306e\u4f8b
\u95a2\u6570\u5f62\u5f0f\u30de\u30af\u30ed\u3068\u306f\u95a2\u6570\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3059\u308b\u30de\u30af\u30ed\u3067\u3001”#define BIT_SET(a, b) (a |= 1 << b)”\u306e\u3088\u3046\u306b”#define \u30de\u30af\u30ed\u540d(\u5f15\u6570) \u51e6\u7406”\u3067\u5b9a\u7fa9\u3057\u307e\u3059\u3002
\u95a2\u6570\u5f62\u5f0f\u30de\u30af\u30ed\u306f\u3001\u95a2\u6570\u547c\u3073\u51fa\u3057\u306b\u304b\u304b\u308b\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u306a\u3044\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u547c\u3073\u51fa\u3057\u304c\u591a\u3044\u3068\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30b5\u30a4\u30ba\u304c\u5897\u52a0\u3059\u308b\u3068\u3044\u3063\u305f\u30c7\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u6e96\u62e0\u3057\u305f\u30d7\u30ed\u30b0\u30e9\u30e0<\/p><\/blockquote><\/figure>\n\n\n\n

\u30eb\u30fc\u30ebNo.19.4\u306b\u6e96\u62e0\u3057\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

#define MACRO1( val ) { ( val ), 0 }\nuint16 u16_tbl[2][2] = {\n    MACRO1( 1 ),\n    MACRO1( 2 )};\n\/* \u6ce2\u62ec\u5f27\u3067\u56f2\u307e\u308c\u305f\u521d\u671f\u5316\u5b50 *\/\n\n#define MACRO2 ( 3 )\n\/* \u5b9a\u6570 *\/\n\n#define MACRO3 ( 3 + 5 * 5 )\n\/* \u62ec\u5f27\u3067\u56f2\u307e\u308c\u305f\u5f0f *\/\n\n#define MACRO4 ( const )\n\/* \u578b\u4fee\u98fe\u5b50\u3078\u306e\u7f6e\u63db *\/\n\n#define MACRO5 ( extern )\n\/* \u8a18\u61b6\u57df\u30af\u30e9\u30b9\u6307\u5b9a\u5b50\u3078\u306e\u7f6e\u63db *\/\n\n#define MACRO6 ()\\\ndo {\\\n    DI();\\\n    work_gbl = work_count;\\\n    work_gbl = work_gbl + TIME_COUNT;\\\n    EI();\\\n} while( 0 )\n\/* do-while-zero\u5f62\u5f0f\u3092\u4f7f\u7528 *\/<\/code><\/pre><\/div>\n\n\n\n
\u30eb\u30fc\u30ebNo.19.4\u306e\u4e2d\u306e”(6)do-while-zero\u5f62\u5f0f\u3092\u4f7f\u7528\u3057\u30011\u3064\u53c8\u306f\u305d\u308c\u4ee5\u4e0a\u306e\u6587\u3092\u4fdd\u8b77\u3057\u305f\u30de\u30af\u30ed”\u306b\u3064\u3044\u3066\u3001\u4eee\u306bdo-while-zero\u3092\u4f7f\u7528\u305b\u305a\u306b\u9038\u8131\u3055\u305b\u305f\u5834\u5408\u3001\u3069\u306e\u3088\u3046\u306a\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3067\u3057\u3087\u3046\u304b\uff1f
\u4e0a\u8a18\u306e”MACRO6″\u304b\u3089\u3001do-while-zero\u3092\u524a\u9664\u3057\u305f”MACRO7″\u3092\u7528\u610f\u3057\u307e\u3057\u305f\u3002
\u3042\u308b\u6761\u4ef6\u3092\u6e80\u305f\u3057\u305f\u6642\u3001”MACRO7″\u3092\u5b9f\u884c\u3059\u308b\u3088\u3046\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7d44\u3093\u3067\u307f\u307e\u3059\u3002<\/p>\n\n\n\n
#define MACRO7 ()\\\n    DI();\\\n    work_gbl = work_count;\\\n    work_gbl = work_gbl + TIME_COUNT;\\\n    EI()\n\/* do-while-zero\u5f62\u5f0f\u3092\u672a\u4f7f\u7528 *\/\n\nif ( a > b )\n    MACRO7();<\/code><\/pre><\/div>\n\n\n\n
\u3053\u3061\u3089\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u5c55\u958b\u3055\u308c\u308b\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
#define MACRO7 ()\\\n    DI();\\\n    work_gbl = work_count;\\\n    work_gbl = work_gbl + TIME_COUNT;\\\n    EI()\n\/* do-while-zero\u5f62\u5f0f\u3092\u672a\u4f7f\u7528 *\/\n\nif ( a > b )\n    DI();\nwork_gbl = work_count;\nwork_gbl = work_gbl + TIME_COUNT;\nEI();<\/code><\/pre><\/div>\n\n\n\n
\u6761\u4ef6\u3092\u6e80\u305f\u3057\u305f\u6642\u306bDI()\u304b\u3089EI()\u307e\u3067\u51e6\u7406\u3092\u5b9f\u884c\u3057\u305f\u3044\u306e\u306b\u3001DI()\u306e\u307f\u5b9f\u884c\u3055\u308c\u6761\u4ef6\u306e\u5224\u5b9a\u7d50\u679c\u306b\u95a2\u4fc2\u306a\u304f\u3001\u4ee3\u5165\u51e6\u7406\u304c\u5b9f\u884c\u3055\u308c\u308b\u3088\u3046\u306b\u5c55\u958b\u3055\u308c\u307e\u3057\u305f\u3002
\u3053\u308c\u306f\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u610f\u56f3\u3068\u306f\u7570\u306a\u308b\u52d5\u4f5c\u306b\u306a\u308a\u307e\u3059\u3002
do-while-zero\u5f62\u5f0f\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3001”MACRO6″\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5c55\u958b\u3055\u308c\u3001\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u610f\u56f3\u3069\u304a\u308a\u306e\u52d5\u4f5c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
if ( a > b )\n    MACRO6();\n\nif ( a > b )\n    do {\n        DI();\n        work_gbl = work_count;\n        work_gbl = work_gbl + TIME_COUNT;\n        EI();\n    } while( 0 );<\/code><\/pre><\/div>\n\n\n\n
<\/div>\n\n\n\n
\u5f8c\u66f8\u304d<\/p><\/blockquote><\/figure>\n\n\n\n
MISRA-C\u306e\u30de\u30af\u30ed\u30eb\u30fc\u30eb\u3001\u3044\u304b\u304c\u3060\u3063\u305f\u3067\u3057\u3087\u3046\u304b\uff1f
\u4fdd\u5b88\u6027\u3001\u53ef\u8aad\u6027\u306e\u9762\u304b\u3089\u30de\u30af\u30ed\u3092\u4f7f\u7528\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3082\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\u5b9a\u7fa9\u306e\u4ed5\u65b9\u306b\u3088\u3063\u3066\u306f\u3001\u4eca\u56de\u7d39\u4ecb\u3057\u305f\u52d5\u4f5c\u306e\u3088\u3046\u306b\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u610f\u56f3\u3057\u306a\u3044\u52d5\u4f5c\u306b\u7e4b\u304c\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002
\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3082\u767a\u751f\u3057\u306a\u3044\u305f\u3081\u3001\u30de\u30af\u30ed\u4f7f\u7528\u7b87\u6240\u306e\u52d5\u4f5c\u78ba\u8a8d\u3084\u5c55\u958b\u3055\u308c\u305f\u30b3\u30fc\u30c9\u306e\u78ba\u8a8d\u306f\u6020\u3089\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002
\u30eb\u30fc\u30eb\u306b\u6e96\u62e0\u3057\u3066\u3044\u308c\u3070\u610f\u56f3\u3057\u306a\u3044\u52d5\u4f5c\u306b\u306f\u306a\u3089\u306a\u3044\u305f\u3081\u3001\u662f\u975e\u6d3b\u7528\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
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\u5f15\u7528\u30fb\u53c2\u8003\u6587\u732e<\/p><\/blockquote><\/figure>\n\n\n\n
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