PIChunkStream

git-svn-id: svn://db.shs.com.ru/pip@176 12ceb7fc-bf1f-11e4-8940-5bc7170c53b5

doc/examples/pichunkstream.cpp

@@ -0,0 +1,49 @@
+#include "pip.h"
+
+//! [struct]
+// Your struct
+struct S {
+	int i;
+	float f;
+	PIString s;
+};
+
+// Operators
+PIByteArray & operator <<(PIByteArray & b, const S & s) {b << s.i << s.f << s.s; return b;}
+PIByteArray & operator >>(PIByteArray & b, S & s) {b >> s.i >> s.f >> s.s; return b;}
+//! [struct]
+//! [write]
+// Write chunk stream
+S s;
+s.i = 99;
+s.f = 0.01;
+s.s = "SSS";
+PIVector<float> f;
+f << -1. << 2.5 << 11.;
+// write some data to empty stream
+PIChunkStream cs;
+cs << cs.chunk(1, int(10))
+   << cs.chunk(2, PIString("text"))
+   << cs.chunk(4, f)
+   << cs.chunk(3, s);
+// now you can take cs.data() and send or place it somewhere ...
+//! [write]
+//! [read]
+// create stream for read, cs from upper code
+PIByteArray ba(cs.data());
+PIChunkStream cs2(ba);
+int i(0);
+PIString str;
+S s;
+PIVector<float> f;
+// read from stream
+while (!cs2.atEnd()) {
+	switch (cs2.read()) {
+	case 1: i = cs2.getData<int>(); break;
+	case 2: str = cs2.getData<PIString>(); break;
+	case 3: s = cs2.getData<S>(); break;
+	case 4: f = cs2.getData<PIVector<float> >(); break;
+	}
+}
+piCout << i << str << f << s.i << s.f << s.s;
+//! [read]