From e9c4e1762c3b7531ffe82dc26c67919ee38bfc3a Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sun, 12 Jan 2014 21:45:54 +0100
Subject: update Log.{h,cpp}

---
 src/Log.cpp | 28 ++++++++++++++++++++++++++--
 src/Log.h   | 17 ++++++++++-------
 2 files changed, 36 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/Log.cpp b/src/Log.cpp
index 7dd9d18..64e7ceb 100644
--- a/src/Log.cpp
+++ b/src/Log.cpp
@@ -23,9 +23,9 @@
  */
 
 #include <list>
+#include <stdarg.h>
 
 #include "Log.h"
-#include "porting.h"
 
 Logger etiLog;
 
@@ -36,7 +36,31 @@ void Logger::register_backend(LogBackend* backend) {
 }
 
 
-void Logger::log(log_level_t level, std::string message) {
+void Logger::log(log_level_t level, const char* fmt, ...)
+{
+    int size = 100;
+    std::string str;
+    va_list ap;
+    while (1) {
+        str.resize(size);
+        va_start(ap, fmt);
+        int n = vsnprintf((char *)str.c_str(), size, fmt, ap);
+        va_end(ap);
+        if (n > -1 && n < size) {
+            str.resize(n);
+            break;
+        }
+        if (n > -1)
+            size = n + 1;
+        else
+            size *= 2;
+    }
+
+    logstr(level, str);
+}
+
+void Logger::logstr(log_level_t level, const std::string message)
+{
     for (std::list<LogBackend*>::iterator it = backends.begin();
             it != backends.end();
             it++) {
diff --git a/src/Log.h b/src/Log.h
index 607735c..e07e825 100644
--- a/src/Log.h
+++ b/src/Log.h
@@ -29,6 +29,7 @@
 #   include "config.h"
 #endif
 
+#include <stdarg.h>
 #include <stdio.h>
 #include <syslog.h>
 #include <fstream>
@@ -38,13 +39,9 @@
 #include <stdexcept>
 #include <string>
 
-#include "porting.h"
-
 #define SYSLOG_IDENT "CRC-DABMUX"
 #define SYSLOG_FACILITY LOG_LOCAL0
 
-extern Logger etiLog;
-
 enum log_level_t {debug = 0, info, warn, error, alert, emerg};
 
 /** Abstract class all backends must inherit from */
@@ -132,15 +129,20 @@ class Logger {
         void register_backend(LogBackend* backend);
 
         /* Log the message to all backends */
-        void log(log_level_t level, std::string message);
+        void log(log_level_t level, const char* fmt, ...);
+
+        void logstr(log_level_t level, const std::string message);
 
-        /* Return a LogLine for the given level */
+        /* Return a LogLine for the given level
+         * so that you can write etiLog.level(info) << "stuff = " << 21 */
         LogLine level(log_level_t level);
 
     private:
         std::list<LogBackend*> backends;
 };
 
+extern Logger etiLog;
+
 // Accumulate a line of logs, using same syntax as stringstream
 // The line is logged when the LogLine gets destroyed
 class LogLine {
@@ -161,7 +163,7 @@ class LogLine {
 
         ~LogLine()
         {
-            logger_->log(level_, os.str());
+            logger_->logstr(level_, os.str());
         }
 
     private:
@@ -172,3 +174,4 @@ class LogLine {
 
 
 #endif
+
-- 
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