Write binary header. (#5532)

trivialfis · web-flow · commit a2f54963b625 · 2020-04-15T17:47:57.000+08:00
diff --git a/src/learner.cc b/src/learner.cc
@@ -777,7 +777,8 @@ class LearnerIO : public LearnerConfiguration {
       }
       extra_attr.emplace_back("metrics", os.str());
     }
-
+    std::string header {"binf"};
+    fo->Write(header.data(), 4);
     fo->Write(&mparam, sizeof(LearnerModelParamLegacy));
     fo->Write(tparam_.objective);
     fo->Write(tparam_.booster);

Original file line number	Diff line number	Diff line change
`@@ -777,7 +777,8 @@ class LearnerIO : public LearnerConfiguration {`
`777`	`777`	`}`
`778`	`778`	`extra_attr.emplace_back("metrics", os.str());`
`779`	`779`	`}`
`780`		`-`
	`780`	`+ std::string header {"binf"};`
	`781`	`+ fo->Write(header.data(), 4);`
`781`	`782`	`fo->Write(&mparam, sizeof(LearnerModelParamLegacy));`
`782`	`783`	`fo->Write(tparam_.objective);`
`783`	`784`	`fo->Write(tparam_.booster);`