{"id":207246,"date":"2025-07-08T09:48:48","date_gmt":"2025-07-08T01:48:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207246\/"},"modified":"2025-07-08T09:48:48","modified_gmt":"2025-07-08T01:48:48","slug":"%e5%a6%82%e4%bd%95%e9%80%9a%e8%bf%87cgo%e4%bb%8ec%e5%87%bd%e6%95%b0%e4%b8%ad%e7%9a%84%e5%86%85%e9%83%a8void-%e8%bf%94%e5%9b%9e%e5%ad%97%e8%8a%82%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207246\/","title":{"rendered":"\u5982\u4f55\u901a\u8fc7CGO\u4eceC\u51fd\u6570\u4e2d\u7684\u5185\u90e8void *\u8fd4\u56de\u5b57\u8282\uff1f"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u901a\u8fc7CGO\u4eceC\u51fd\u6570\u4e2d\u7684\u5185\u90e8void *\u8fd4\u56de\u5b57\u8282\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-21 08:39:36<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u901a\u8fc7CGO\u4eceC\u51fd\u6570\u4e2d\u7684\u5185\u90e8void *\u8fd4\u56de\u5b57\u8282\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u4f7f\u7528\u4ee5\u4e0b\u5b9a\u4e49\u5305\u88c5\u4e00\u4e2a c \u51fd\u6570\uff1a<\/p>\n

int parser_shift(parser* parser, void* buffer, int length);<\/pre>\n
\u5b83\u4ece\u672a\u89e3\u6790\u5b57\u8282\u7684\u5185\u90e8\u7f13\u51b2\u533a\u4e2d\u5220\u9664\u6700\u591a length \u4e2a\u5b57\u8282\uff0c\u5e76\u5c06\u5b83\u4eec\u5b58\u50a8\u5728\u7ed9\u5b9a\u7684\u7f13\u51b2\u533a\u4e2d\u3002<\/p>\n
\u73b0\u5728\u6211\u5e0c\u671b\u5c06\u5176\u5305\u88c5\u5230\u5177\u6709\u4ee5\u4e0b\u5b9a\u4e49\u7684 go \u51fd\u6570\u4e2d\uff1a<\/p>\n
func (p *parser) shift() []byte {\n    var buffer []byte\n    \/\/ todo:\n\n    return buffer\n}<\/pre>\n
\u7528 cgo \u5b8c\u6210\u4e0a\u9762\u7684 todo \u7684\u6b63\u786e\u4e66\u5199\u65b9\u5f0f\u662f\u4ec0\u4e48\uff1f <\/p>\n
\u6211\u5c1d\u8bd5\u4e86\u4ee5\u4e0b\u65b9\u6cd5\uff0c\u4f46\u5b83\u56e0\u9519\u8bef\u800c\u5d29\u6e83\uff1a\u201c\/path\/to\/my\/program\u201d\u4e2d\u7684\u9519\u8bef\uff1afree\uff08\uff09\uff1a\u65e0\u6548\u7684\u4e0b\u4e00\u4e2a\u5927\u5c0f\uff08\u5feb\u901f\uff09\uff1a0x00007f8fe0000aa0\uff1a<\/p>\n
var buffer []byte\nbufStr := C.CString(string(buffer))\ndefer C.free(unsafe.Pointer(bufStr))\nC.parser_shift(p.Cparser, unsafe.Pointer(bufStr), C.int(8192))\nbuffer = []byte(C.GoString(bufStr))\nreturn buffer<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u5047\u8bbe\u60a8\u7684 parser_shift<\/code> \u51fd\u6570\u8fd4\u56de\u5b9e\u9645\u5b58\u50a8\u5728\u7f13\u51b2\u533a\u4e2d\u7684\u5b57\u8282\u6570\uff0c\u60a8\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n
func (p *parser) shift() []byte {\n    var buffer [8192]byte\n    parsed := int(c.parser_shift(p.cparser, unsafe.pointer(&buffer[0]), c.int(len(buffer))))\n    return buffer[:parsed]\n}<\/pre>\n
\u4e0d\u9700\u8981\u4e0e\u5b57\u7b26\u4e32\u8fdb\u884c\u8f6c\u6362\uff0c\u53ea\u9700\u5c06\u60a8\u60f3\u8981\u5199\u5165\u7684\u5185\u5b58\u4f20\u9012\u7ed9\u5b83\u5373\u53ef\u3002<\/p>\n
\u5c1d\u8bd5\u8fd9\u4e2a\u51fd\u6570<\/p>\n
\/\/ C pointer, length to Go []byte\nfunc C.GoBytes(unsafe.Pointer, C.int) []byte\n<\/pre>\n
\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u901a\u8fc7CGO\u4eceC\u51fd\u6570\u4e2d\u7684\u5185\u90e8void *\u8fd4\u56de\u5b57\u8282\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207246","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207246"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207246\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}