first re-commit.

pigpio-master/EXAMPLES/C/IR_RECEIVER/test_ir_hasher.c

@@ -0,0 +1,47 @@
+#include <stdio.h>
+
+#include <pigpio.h>
+
+#include "ir_hasher.h"
+
+/*
+
+REQUIRES
+
+An IR receiver output pin connected to a Pi gpio.
+
+TO BUILD
+
+gcc -o ir_hash_c test_ir_hasher.c  ir_hasher.c -lpigpio -lrt -lpthread
+
+TO RUN
+
+sudo ./ir_hash_c
+
+*/
+
+void callback(uint32_t hash)
+{
+   printf("hash=%u\n", hash);
+}
+
+int main(int argc, char *argv[])
+{
+   Pi_Hasher_t *hasher;
+
+   if (gpioInitialise() < 0) return 1;
+
+   /* 
+      This assumes the output pin of an IR receiver is
+      connected to gpio 7.
+   */
+
+   hasher = Pi_Hasher(7, callback, 5);
+
+   sleep(300);
+
+   Pi_Hasher_cancel(hasher);
+
+   gpioTerminate();
+}
+