Introduce Scenario class

src/sys/scenario.cpp

@@ -0,0 +1,30 @@
+#include "scenario.h"
+#include <string.h>
+#include "encoding.h"
+
+void Scenario::skip_string(Encoding *enc, uint8_t terminator)
+{
+	for (uint8_t c = getd(); c != terminator; c = getd()) {
+		if (c != '\\')
+			ungetd();
+		skip(enc->mblen(ptr()));
+	}
+}
+
+void Scenario::get_syseng_string(char* buf, int size, Encoding *enc, uint8_t terminator)
+{
+	int start_addr = addr();
+
+	int i = 0;
+	for (uint8_t c = getd(); c != terminator; c = getd()) {
+		if (c != '\\')
+			ungetd();
+		int len = enc->mblen(ptr());
+		if (i + len < size - 1) {
+			memcpy(&buf[i], ptr(), len);
+			i += len;
+		}
+		skip(len);
+	}
+	buf[i] = '\0';
+}