Basic support for emailing a report of a problem (#43).

[dcpomatic.git] / src / lib / log.cc

diff --git a/src/lib/log.cc b/src/lib/log.cc
index accf3694d3775d24609c0149658ab7f76b5a7d87..156f8cf8bb3bc38e2c0964dfd19c243b095f802f 100644 (file)
--- a/src/lib/log.cc
+++ b/src/lib/log.cc
@@ -21,43 +21,144 @@
  *  @brief A very simple logging class.
  */
 
-#include <fstream>
 #include <time.h>
+#include <cstdio>
 #include "log.h"
+#include "cross.h"
+#include "config.h"
+#include "safe_stringstream.h"
+
+#include "i18n.h"
 
 using namespace std;
 
-/** @param f Filename to write log to */
-Log::Log (string f)
-       : _file (f)
-       , _level (VERBOSE)
+int const Log::TYPE_GENERAL = 0x1;
+int const Log::TYPE_WARNING = 0x2;
+int const Log::TYPE_ERROR   = 0x4;
+int const Log::TYPE_TIMING  = 0x8;
+
+Log::Log ()
+       : _types (0)
 {
+       _config_connection = Config::instance()->Changed.connect (boost::bind (&Log::config_changed, this));
+       config_changed ();
+}
 
+void
+Log::config_changed ()
+{
+       set_types (Config::instance()->log_types ());
 }
 
 /** @param n String to log */
 void
-Log::log (string m, Level l)
+Log::log (string message, int type)
 {
        boost::mutex::scoped_lock lm (_mutex);
 
-       if (l > _level) {
+       if ((_types & type) == 0) {
                return;
        }
-       
-       ofstream f (_file.c_str(), fstream::app);
 
        time_t t;
        time (&t);
        string a = ctime (&t);
+
+       SafeStringStream s;
+       s << a.substr (0, a.length() - 1) << N_(": ");
+
+       if (type & TYPE_ERROR) {
+               s << "ERROR: ";
+       }
+
+       if (type & TYPE_WARNING) {
+               s << "WARNING: ";
+       }
        
-       f << a.substr (0, a.length() - 1) << ": " << m << "\n";
+       s << message;
+       do_log (s.str ());
 }
 
 void
-Log::set_level (Level l)
+Log::microsecond_log (string m, int t)
+{
+       boost::mutex::scoped_lock lm (_mutex);
+
+       if ((_types & t) == 0) {
+               return;
+       }
+
+       struct timeval tv;
+       gettimeofday (&tv, 0);
+
+       SafeStringStream s;
+       s << tv.tv_sec << N_(":") << tv.tv_usec << N_(" ") << m;
+       do_log (s.str ());
+}      
+
+void
+Log::set_types (int t)
 {
        boost::mutex::scoped_lock lm (_mutex);
-       _level = l;
+       _types = t;
+}
+
+/** @param file Filename to write log to */
+FileLog::FileLog (boost::filesystem::path file)
+       : _file (file)
+{
+
 }
 
+void
+FileLog::do_log (string m)
+{
+       FILE* f = fopen_boost (_file, "a");
+       if (!f) {
+               cout << "(could not log to " << _file.string() << "): " << m << "\n";
+               return;
+       }
+
+       fprintf (f, "%s\n", m.c_str ());
+       fclose (f);
+}
+
+string
+FileLog::head_and_tail () const
+{
+       boost::mutex::scoped_lock lm (_mutex);
+
+       uintmax_t head_amount = 1024;
+       uintmax_t tail_amount = 1024;
+       uintmax_t size = boost::filesystem::file_size (_file);
+
+       if (size < (head_amount + tail_amount)) {
+               head_amount = size;
+               tail_amount = 0;
+       }
+       
+       FILE* f = fopen_boost (_file, "r");
+       if (!f) {
+               return "";
+       }
+
+       string out;
+
+       char* buffer = new char[max(head_amount, tail_amount) + 1];
+       
+       int N = fread (buffer, 1, head_amount, f);
+       buffer[N] = '\0';
+       out += buffer;
+
+       fseek (f, tail_amount, SEEK_END);
+       
+       N = fread (buffer, 1, tail_amount, f);
+       buffer[N] = '\0';
+       out += buffer;
+
+       delete[] buffer;
+
+       fclose (f);
+
+       return out;
+}