first re-commit.

pigpio-master/EXAMPLES/CPP/IR_RECEIVER/test_ir_hasher.cpp

@@ -0,0 +1,44 @@
+#include <iostream>
+
+#include <pigpio.h>
+
+#include "ir_hasher.hpp"
+
+/*
+
+REQUIRES
+
+An IR receiver output pin connected to a Pi gpio.
+
+TO BUILD
+
+g++ -o ir_hash_cpp test_ir_hasher.cpp ir_hasher.cpp -lpigpio -lrt -lpthread
+
+TO RUN
+
+sudo ./ir_hash_cpp
+
+*/
+
+void callback(uint32_t hash)
+{
+   std::cout << "hash=" << hash << std::endl;
+}
+
+int main(int argc, char *argv[])
+{
+   if (gpioInitialise() >= 0)
+   {
+      /* Can't instantiate a Hasher before pigpio is initialised. */
+
+      /* 
+         This assumes the output pin of an IR receiver is
+         connected to gpio 7.
+      */
+
+      Hasher ir(7, callback);
+
+      sleep(300);
+   }
+}
+