-/// engine_name() returns the full name of the current Glaurung version.
-/// This will be either "Glaurung YYMMDD" (where YYMMDD is the date when the
-/// program was compiled) or "Glaurung <version number>", depending on whether
-/// the constant EngineVersion (defined in misc.h) is empty.
-
-const std::string engine_name() {
- if(EngineVersion == "") {
- static const char monthNames[12][4] = {
- "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"
- };
- const char *dateString = __DATE__;
- std::stringstream s;
- int month = 0, day = 0;
-
- for(int i = 0; i < 12; i++)
- if(strncmp(dateString, monthNames[i], 3) == 0)
- month = i + 1;
- day = atoi(dateString+4);
-
- s << "Glaurung " << (dateString+9) << std::setfill('0') << std::setw(2)
- << month << std::setfill('0') << std::setw(2) << day;
-
- return s.str();
+
+/// Our fancy logging facility. The trick here is to replace cin.rdbuf() and
+/// cout.rdbuf() with two Tie objects that tie cin and cout to a file stream. We
+/// can toggle the logging of std::cout and std:cin at runtime whilst preserving
+/// usual i/o functionality, all without changing a single line of code!
+/// Idea from http://groups.google.com/group/comp.lang.c++/msg/1d941c0f26ea0d81
+
+struct Tie: public streambuf { // MSVC requires splitted streambuf for cin and cout
+
+ Tie(streambuf* b, ofstream* f) : buf(b), file(f) {}
+
+ int sync() { return file->rdbuf()->pubsync(), buf->pubsync(); }
+ int overflow(int c) { return log(buf->sputc((char)c), "<< "); }
+ int underflow() { return buf->sgetc(); }
+ int uflow() { return log(buf->sbumpc(), ">> "); }
+
+ streambuf* buf;
+ ofstream* file;
+
+ int log(int c, const char* prefix) {
+
+ static int last = '\n';
+
+ if (last == '\n')
+ file->rdbuf()->sputn(prefix, 3);
+
+ return last = file->rdbuf()->sputc((char)c);