{"id":6132,"date":"2023-03-26T15:19:22","date_gmt":"2023-03-26T06:19:22","guid":{"rendered":"https:\/\/www.chihayafuru.jp\/tech\/?p=6132"},"modified":"2024-06-05T17:43:39","modified_gmt":"2024-06-05T08:43:39","slug":"setjmp-%e3%81%a8-longjmp-%e3%81%ae%e4%bd%bf%e3%81%84%e3%81%8b%e3%81%9f","status":"publish","type":"post","link":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/archives\/6132","title":{"rendered":"[C\u8a00\u8a9e] setjmp() \u3068 longjmp() \u306e\u4f7f\u3044\u304b\u305f"},"content":{"rendered":"<p>C\u8a00\u8a9e\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570 setjmp() \u3068 longjmp() \u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3067\u591a\u6bb5\u306e\u95a2\u6570\u547c\u51fa\u968e\u5c64\u3092\u98db\u3073\u8d8a\u3048\u308b\u30b8\u30e3\u30f3\u30d7\uff08\u3044\u308f\u3086\u308bGOTO\u51e6\u7406\uff09\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u306a\u304c\u3089\u3001\u73fe\u4ee3\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f GOTO\u6587 \u304c\u5fcc\u907f\u3055\u308c\u308b\u3088\u3046\u306b\u3001setjmp() \u3068 longjmp() \u3092\u4f7f\u3063\u305f\u30b8\u30e3\u30f3\u30d7\u306f\u63a8\u5968\u3055\u308c\u307e\u305b\u3093\u3002\u3084\u3080\u3092\u5f97\u305a setjmp() \u3068 longjmp() \u3067\u5b9f\u88c5\u3055\u308c\u305f\u65e2\u5b58\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u52a9\u3051\u3068\u306a\u308b\u3053\u3068\u3092\u76ee\u8ad6\u3093\u3060\u89e3\u8aac\u3067\u3059\u3002<\/p>\n<dl>\n<dt>\u591a\u6bb5\u306e\u95a2\u6570\u547c\u51fa\u968e\u5c64<\/dt>\n<dd>\u95a2\u6570\u306e\u4e2d\u304b\u3089\u4e0b\u4f4d\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3066\u3001\u305d\u306e\u4e0b\u4f4d\u306e\u95a2\u6570\u306e\u4e2d\u304b\u3089\u4e0b\u4f4d\u306e\u4e0b\u4f4d\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3066\u3001\u305d\u306e\u4e0b\u4f4d\u306e\u4e0b\u4f4d\u306e\u95a2\u6570\u306e\u4e2d\u304b\u3089\u4e0b\u4f4d\u306e\u4e0b\u4f4d\u306e\u4e0b\u4f4d\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3001\u3068\u3044\u3063\u305f\u69cb\u9020<\/dd>\n<\/dl>\n<p><!--more--><\/p>\n<h3>1. \u5358\u7d14\u306a\u30ed\u30f3\u30b0\u30b8\u30e3\u30f3\u30d7\u306e\u4f8b<\/h3>\n<h4>1.1. \u30b5\u30f3\u30d7\u30eb\u30fb\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<\/h3>\n<pre class=\"nums:true lang:c decode:true \" >#include &lt;stdio.h>\r\n#include &lt;stdlib.h>\r\n#include &lt;setjmp.h>\r\n\r\njmp_buf jump_buffer;    \/* longjmp() \u304b\u3089\u5fa9\u5e30\u3057\u305f\u3068\u304d\u306b\u5fa9\u5143\u3059\u308b\u305f\u3081\u306e\u30d0\u30c3\u30d5\u30a1 *\/\r\n\r\nvoid top_function(void);\r\nvoid middle_function(void);\r\nvoid bottom_function(void);\r\n\r\nint main(void) {\r\n    printf(\"start of main().\\n\");\r\n    if (setjmp(jump_buffer) == 0) {\r\n        \/* \u6700\u521d\u306b setjmp() \u3092\u547c\u3073\u51fa\u3057\u305f\u3068\u304d\u306f\u3001\u3053\u3061\u3089\u306b\u5206\u5c90\u3059\u308b *\/\r\n        printf(\"call top_function().\\n\");\r\n        top_function();\r\n        printf(\"returned from top_function().\\n\");\r\n    } else {\r\n        \/* longjmp()\u304b\u3089\u5fa9\u5e30\u3057\u305f\u3068\u304d\u306f\u3001\u3053\u3061\u3089\u306b\u5206\u5c90\u3059\u308b *\/\r\n        printf(\"returned from longjmp().\\n\");\r\n    }\r\n    printf(\"end of main().\\n\");\r\n    return 0;\r\n}\r\n\r\nvoid top_function(void)\r\n{\r\n    printf(\"start of top_function().\\n\");\r\n    middle_function();\r\n    printf(\"end of top_function().\\n\");\r\n    return;\r\n}\r\n\r\nvoid middle_function(void)\r\n{\r\n    printf(\"start of middle_function().\\n\");\r\n    bottom_function();\r\n    printf(\"end of middle_function().\\n\");\r\n    return;\r\n}\r\n\r\nvoid bottom_function(void)\r\n{\r\n    printf(\"start of bottlm_function().\\n\");\r\n    longjmp(jump_buffer, 1);    \/* setjmp() \u3092\u547c\u3073\u51fa\u3057\u305f \u95a2\u6570 main() \u3078\u4e00\u8db3\u98db\u3073\u306b\u623b\u308b *\/\r\n    printf(\"end of bottom_function().\\n\");  \/* \u3053\u306e\u51e6\u7406\u304c\u5b9f\u884c\u3055\u308c\u308b\u3053\u3068\u306f\u306a\u3044 *\/\r\n    return;\r\n}<\/code><\/pre>\n<h4>1.2. \u30b5\u30f3\u30d7\u30eb\u30fb\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c<\/h4>\n<pre class=\"lang:default highlight:0 decode:true \" >start of main().\r\ncall top_function().\r\nstart of top_function().\r\nstart of middle_function().\r\nstart of bottlm_function().\r\nreturned from longjmp().\r\nend of main().<\/pre>\n<ol>\n<li>\u95a2\u6570 main() \u306e\u4e2d\u304b\u3089 top_function() \u3092 top_function() \u306e\u4e2d\u304b\u3089 middle_function() \u3092 middle_function() \u306e\u4e2d\u304b\u3089 bottom_function() \u3092\u9806\u306b\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u95a2\u6570 main() \u306e\u4e2d\u3067 top_function() \u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u6b21\u884c\u306e printf() \u3092\u5b9f\u884c\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<li>\u95a2\u6570 top_function() \u306e\u4e2d\u3067 middle_function() \u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u6b21\u884c\u306e printf() \u3092\u5b9f\u884c\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<li>\u95a2\u6570 middle_function() \u306e\u4e2d\u3067 button_function() \u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u6b21\u884c\u306e printf() \u3092\u5b9f\u884c\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<li>\u95a2\u6570 buttom_function() \u306e\u4e2d\u3067\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570 longjmp() \u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u6b21\u884c\u306e printf() \u3092\u5b9f\u884c\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<li>\u95a2\u6570 buttom_function() \u306e\u4e2d\u3067\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570 longjmp() \u3092\u547c\u3073\u51fa\u3057\u305f\u76f4\u5f8c\u306b main() \u4e2d\u306eelse\u53e5\u3092\u5b9f\u884c\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n<h4>1.3. \u30b7\u30fc\u30b1\u30f3\u30b9\u56f3<\/h4>\n<h4>1.3.1. return\u6587\u3067\u95a2\u6570\u547c\u3073\u51fa\u3057\u3092\uff11\u968e\u5c64\u305a\u3064\u547c\u51fa\u5143\u3078\u623b\u3063\u305f\u3070\u3042\u3044<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/chihayafuru.s3-ap-northeast-1.amazonaws.com\/imgs\/wp\/2023\/03\/return_sequence.png\" alt=\"return\u6587\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\"><\/p>\n<h4>1.3.2. longjmp()\u3067\u95a2\u6570\u547c\u3073\u51fa\u3057\u306e\u5148\u7aef\u304b\u3089\u4e00\u8db3\u98db\u3073\u306b\u6700\u4e0a\u4f4d\u306e\u547c\u51fa\u5143\u3078\u623b\u3063\u305f\u3070\u3042\u3044<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/chihayafuru.s3-ap-northeast-1.amazonaws.com\/imgs\/wp\/2023\/03\/longjmp_sequence.png\" alt=\"longjmp\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\"><\/p>\n<h4>1.4. \u89e3\u8aac<\/h3>\n<p>\u95a2\u6570 main() \u306e\u4e2d\u3067 setjmp() \u3092\u547c\u3073\u51fa\u3057\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u3001longjmp() \u304b\u3089\u30b8\u30e3\u30f3\u30d7\uff08\u5fa9\u5e30\uff09\u3057\u3066\u304d\u305f\u3068\u304d\u306b\u5fa9\u5143\u3059\u308b\u30b9\u30bf\u30c3\u30af\u60c5\u5831\u3092\u9759\u7684\u306a\u5909\u6570 jmp_buf jump_buffer \u306b\u4fdd\u5b58\u3057\u3066\u3044\u307e\u3059\u3002\u3082\u3057\u3001longjmp() \u3067\u5fa9\u5e30\u3057\u3066\u304f\u308b\u524d\u306b jump_buffer \u306e\u5185\u5bb9\u3092\u58ca\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u30b8\u30e3\u30f3\u30d7\u3067\u623b\u3063\u3066\u304d\u305f\u306e\u306f\u826f\u3044\u3082\u306e\u306e\u95a2\u6570 main() \u306f\u7d9a\u304d\u306e\u51e6\u7406\u3092\u6b63\u3057\u304f\u5b9f\u884c\u3067\u304d\u307e\u305b\u3093\u3002\u3082\u3057 longjmp() \u3067\u623b\u3063\u3066\u3053\u306a\u3051\u308c\u3070 jump_buffer \u306b\u4fdd\u5b58\u3057\u305f\u60c5\u5831\u306f\u4e0d\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u95a2\u6570 setjmp() \u3092\u6700\u521d\u306b\u547c\u3073\u51fa\u3057\u305f\u3068\u304d\u306f\u3000\u5fc5\u305a 0 (\u30bc\u30ed) \u3092\u8fd4\u3057\u307e\u3059\u3002\u6b21\u306b longjmp() \u304b\u3089\u30b8\u30e3\u30f3\u30d7\uff08\u5fa9\u5e30\uff09\u3057\u3066\u304d\u305f\u3068\u304d\u306f\u5fc5\u305a\u975e\u30bc\u30ed\u3092\u8fd4\u3059\u305f\u3081\u3001else\u53e5\u306b\u5206\u5c90\u3057\u307e\u3059\u3002<\/p>\n<p>\u95a2\u6570 top_function() \u3060\u3051\u306b\u7740\u76ee\u3059\u308b\u3068 middle_function() \u304b\u3089return\u6587\u3067\u623b\u3063\u3066\u304d\u3066\u6b21\u884c\u306e printf() \u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3092\u671f\u5f85\u3057\u307e\u3059\u3002\u3057\u304b\u3057 longjmp() \u3067\u4e00\u8db3\u98db\u3073\u306b\u95a2\u6570 main() \u306b\u623b\u3063\u3066\uff08\u30b8\u30e3\u30f3\u30d7\u3057\u3066\uff09\u3057\u307e\u3046\u305f\u3081\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u304b\u3089\u52d5\u4f5c\u3092\u8ffd\u8de1\u3059\u308b\u3053\u3068\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u540c\u69d8\u306b middle_function() \u3060\u3051\u306b\u7740\u76ee\u3059\u308b\u3068 buttom_function() \u304b\u3089return\u6587\u3067\u623b\u3063\u3066\u304d\u3066\u6b21\u884c\u306e printf() \u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3092\u671f\u5f85\u3057\u307e\u3059\u3002\u3057\u304b\u3057 longjmp() \u3067\u4e00\u8db3\u98db\u3073\u306b\u95a2\u6570 main() \u306b\u623b\u3063\u3066\uff08\u30b8\u30e3\u30f3\u30d7\u3057\u3066\uff09\u3057\u307e\u3046\u305f\u3081\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u304b\u3089\u52d5\u4f5c\u3092\u8ffd\u8de1\u3059\u308b\u3053\u3068\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u95a2\u6570 bottom_function() \u306e\u4e2d\u3067\u5fc5\u305a longjmp() \u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u5e38\u306b button_function() \u304b\u3089 top_function() \u307e\u3067\u306ereturn\u6587\u304c\u7701\u7565\uff08\u30b9\u30ad\u30c3\u30d7\uff09\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057 longjmp() \u3092\u547c\u3073\u51fa\u3059\u6761\u4ef6\u3092\u5206\u5c90\u3059\u308c\u3070\u3001\u95a2\u6570\u304b\u3089\u629c\u3051\u51fa\u308b\u624b\u9806\uff08\u623b\u3063\u3066\u3044\u304f\u5148\uff09\u304c\u30de\u30c1\u30de\u30c1\u306b\u3042\u308a\u307e\u3059\u3002\u3082\u3057\u304f\u306f\u30de\u30c1\u30de\u30c1\u306b\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u306b\u3057\u3066 longjmp() \u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n<h3>2. \u7e70\u308a\u8fd4\u3057\u51e6\u7406\u306e\u4e2d\u3067\u30ed\u30f3\u30b0\u30b8\u30e3\u30f3\u30d7\u3092\u3064\u304b\u3063\u305f\u4f8b<\/h3>\n<h4>2.1. \u30b5\u30f3\u30d7\u30eb\u30fb\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<\/h4>\n<pre class=\"nums:true lang:c decode:true \" >#include &lt;stdio.h&gt;\r\n#include &lt;stdlib.h&gt;\r\n#include &lt;setjmp.h&gt;\r\n#include &lt;time.h&gt;\r\n\r\njmp_buf jump_buffer;    \/* \u30ed\u30f3\u30b0\u30b8\u30e3\u30f3\u30d7\u306e\u5fa9\u5e30\u5148\u30b9\u30bf\u30c3\u30af\u3092\u4fdd\u5b58\u3059\u308b\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570 *\/\r\n\r\nvoid countdown(void);\r\nvoid ignition(void);\r\nvoid start_engine(void);\r\nvoid lift_up();\r\n\r\n\r\nint main(void)\r\n{\r\n    if (setjmp(jump_buffer) == 0) {\r\n        \/* setjmp() \u3092\u6700\u521d\u306b\u547c\u3073\u51fa\u3057\u305f\u3068\u304d\u306f\u3001\u3053\u3061\u3089\u306b\u5206\u5c90\u3059\u308b *\/\r\n        countdown();\r\n        printf(\"\\n*** success! ***\\n\");\r\n    } else {\r\n        \/* longjmp() \u304b\u3089\u5fa9\u5e30\u3057\u3066\u304d\u305f\u3068\u304d\u306f\u3001\u3053\u3061\u3089\u306b\u5206\u5c90\u3059\u308b *\/\r\n        printf(\"\\n*** failed. ***\\n\");\r\n    }\r\n\r\n    return 0;\r\n}\r\n\r\n\/*\r\n * \u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u3092\u5b9f\u884c\u3057\u3001\u5404\u30bf\u30a4\u30df\u30f3\u30b0\u3067 ignition() \u3068 start_engine() \u3068 lift_up() \u3092\u547c\u3073\u51fa\u3059\u95a2\u6570\r\n *\/\r\nvoid countdown(void)\r\n{\r\n    for (int counter = 10 ; counter &gt;=0 ; counter--) {\r\n        printf(\"%d.\\n\", counter);\r\n\r\n        switch (counter) {\r\n            case 5:\r\n                ignition();\r\n                break;\r\n            case 3:\r\n                start_engine();\r\n                break;\r\n            case 0:\r\n                lift_up();\r\n                break;\r\n            default:\r\n                ;   \/* do nothing *\/\r\n        }\r\n    }\r\n\r\n    return;\r\n}\r\n\r\nvoid ignition(void)\r\n{\r\n    printf(\"Ignition!\\n\");\r\n    return;\r\n}\r\n\r\nvoid start_engine(void)\r\n{\r\n    \/* \u4e71\u6570\u3092\u751f\u6210\u3059\u308b *\/\r\n    srand((unsigned int)time(NULL));\r\n    int random_number = rand();\r\n\r\n    \/* \u4e71\u6570\u306e\u5076\u5947\u3067\u6210\u529f\u3068\u5931\u6557\u306b\u5206\u5c90\u3059\u308b *\/\r\n    if ((random_number % 2) == 0) {\r\n        printf(\"Start all engines!\\n\");\r\n    } else {\r\n        printf(\"Abort all engines!\\n\");\r\n        longjmp(jump_buffer, 1);\r\n    }\r\n\r\n    return;\r\n}\r\n\r\nvoid lift_up()\r\n{\r\n    printf(\"Lift up!\\n\");\r\n    return;\r\n}<\/pre>\n<h4>2.2. \u30b5\u30f3\u30d7\u30eb\u30fb\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c<\/h4>\n<pre class=\"lang:default highlight:0 decode:true \" >10.\r\n9.\r\n8.\r\n7.\r\n6.\r\n5.\r\nIgnition!\r\n4.\r\n3.\r\nStart all engines!\r\n2.\r\n1.\r\n0.\r\nLift up!\r\n\r\n*** success! ***<\/pre>\n<pre class=\"lang:default highlight:0 decode:true \" >10.\r\n9.\r\n8.\r\n7.\r\n6.\r\n5.\r\nIgnition!\r\n4.\r\n3.\r\nAbort all engines!\r\n\r\n*** failed. ***<\/pre>\n<ol>\n<li>\u95a2\u6570 start_engine() \u306e\u4e2d\u3067\u4e71\u6570\u3092\u751f\u6210\u3057\u3001longjmp()\u3092\u5b9f\u884c\u3057\u305f\u308a\u3057\u306a\u304b\u305f\u308a\u5206\u5c90\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u95a2\u6570 start_engine() \u306e\u4e2d\u3067\u30ed\u30f3\u30b0\u30b8\u30e3\u30f3\u30d7\u3092\u5b9f\u884c\u3057\u306a\u3044\u3068\u304d\u306f\u3001\u95a2\u6570 countdown() \u306e\u4e2d\u306e\u51e6\u7406\uff08\u542b\u3080for\u30eb\u30fc\u30d7\uff09\u3092\u5168\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>\n<li>\u95a2\u6570 start_engine() \u306e\u4e2d\u3067\u30ed\u30f3\u30b0\u30b8\u30e3\u30f3\u30d7\u3092\u5b9f\u884c\u3057\u305f\u3068\u304d\u306f\u3001\u95a2\u6570 countdown() \u306e\u4e2d\u306e\u7d9a\u304d\u306e\u51e6\u7406\u304c\u4e38\u3063\u3068\u30b9\u30ad\u30c3\u30d7\u3057\u3066\u3001 main() \u306b\u623b\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<h4>2.3. \u89e3\u8aac<\/h3>\n<p>\u3044\u308f\u3086\u308b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u3068\u304d\u306b\u3001\u4ee5\u964d\u306e\u51e6\u7406\u3092\u4e38\u3063\u3068\u30b9\u30ad\u30c3\u30d7\u3059\u308b\u6d41\u308c\u304c\u7c21\u6613\u306b\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u4f8b\u3067\u306f\u95a2\u6570\u547c\u3073\u51fa\u3057\u304c\uff12\u968e\u5c64\u3068\u6d45\u304f\u3001longjmp() \u3092\u547c\u3073\u51fa\u3059\u7b87\u6240\u304c\u4e00\u7b87\u6240\u3067\u3042\u308b\u305f\u3081\u3001\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u304b\u3089\u5168\u4f53\u306e\u51e6\u7406\u306e\u6d41\u308c\u3092\u8ffd\u8de1\u3059\u308b\u3044\u3053\u3068\u306f\u6bd4\u8f03\u7684\u5bb9\u6613\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u95a2\u6570\u547c\u51fa\u3057\u304c\uff14\u968e\u5c64\u3001\uff15\u968e\u5c64\u3068\u6df1\u304f\u306a\u308a\u3001longjmp() \u3092\u4f7f\u3063\u3066\u30b8\u30e3\u30f3\u30d7\u3059\u308b\u7b87\u6240\u304c\u8907\u6570\u5b58\u5728\u3059\u308b\u3068\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3084\u30c7\u30d0\u30c3\u30b0\u304c\u96e3\u3057\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>3. \u30ed\u30f3\u30b0\u30b8\u30e3\u30f3\u30d7\u306e\u5f0a\u5bb3<\/h3>\n<ol>\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u5fc5\u8981\u306a\u5f8c\u59cb\u672b\uff08\u305f\u3068\u3048\u3070Open\u51e6\u7406\u306b\u5bfe\u3059\u308bClose\u51e6\u7406\uff09\u304c\u6f0f\u308c\u308b\uff08\u610f\u56f3\u305b\u305a\u306b\u30b9\u30ad\u30c3\u30d7\u3059\u308b\uff09\u30df\u30b9\u3092\u8a98\u767a\u3057\u307e\u3059\u3002<\/li>\n<li>\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306e\u300e\u3053\u3053\u300f\u3092\u901a\u904e\u3059\u308b\u306f\u305a\u3001\u3068printf\u30c7\u30d0\u30c3\u30b0\u3092\u57cb\u3081\u8fbc\u3093\u3060\u308a\u3001\u30c7\u30d0\u30c3\u30ac\u3067\u30d6\u30ec\u30a4\u30af\u30dd\u30a4\u30f3\u30c8\u3092\u4ed5\u639b\u3051\u3066\u3082\u3001\u3059\u308b\u3063\u3068\u901a\u308a\u629c\u3051\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n<h3>4. \u53c2\u8003\u30ea\u30f3\u30af<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.ibm.com\/docs\/ja\/i\/7.4?topic=functions-longjmp-restore-stack-environment\">IBM : longjmp() &#8211; \u30b9\u30bf\u30c3\u30af\u74b0\u5883\u306e\u5fa9\u5143<\/a><\/li>\n<li><a href=\"https:\/\/www.jpcert.or.jp\/sc-rules\/c-msc22-c.html\">JPCERT\/CC : MSC22-C. setjmp()\u3001longjmp() \u306e\u6a5f\u80fd\u3092\u5b89\u5168\u306b\u4f7f\u7528\u3059\u308b<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>C\u8a00\u8a9e\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570 setjmp() \u3068 longjmp() \u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3067\u591a\u6bb5\u306e\u95a2\u6570\u547c\u51fa\u968e\u5c64\u3092\u98db\u3073\u8d8a\u3048\u308b\u30b8\u30e3\u30f3\u30d7\uff08\u3044\u308f\u3086\u308bGOTO\u51e6\u7406\uff09\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u306a\u304c\u3089\u3001\u73fe\u4ee3\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f GOTO\u6587 \u304c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[80],"class_list":["post-6132","post","type-post","status-publish","format-standard","hentry","category-memo","tag-c"],"_links":{"self":[{"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/posts\/6132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/comments?post=6132"}],"version-history":[{"count":53,"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/posts\/6132\/revisions"}],"predecessor-version":[{"id":6900,"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/posts\/6132\/revisions\/6900"}],"wp:attachment":[{"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/media?parent=6132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/categories?post=6132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chihayafuru.jp\/tech\/index.php\/wp-json\/wp\/v2\/tags?post=6132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}