add a data parser to dump content of the file

test/data-gen.c

@@ -5,17 +5,28 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include <float.h>
+#include <time.h>
+#include <errno.h>
 
 
 /*
  * Generate test data
  */
 
+
+// generate float number between 0 and 99 with at most 2 decimal
+float gen_float(void){
+	u_int32_t my_int = rand() % 10000;
+	float my_float = (float) my_int / 100;
+	return my_float;
+  }
+
+
 // generate some data such that we can reduce it later
 void prepare_data(int size){
   float * data = malloc(size * sizeof(float));
   for(int i=0; i < size; i++){
-    data[i] = (float) i;
+    data[i] = (float) gen_float();
   }
 
   FILE * file = fopen("data.bin", "wb");
@@ -25,8 +36,28 @@ void prepare_data(int size){
   free(data);
 }
 
+// parse generated data
+void parse_data(int size){
+  float data ;
+
+  FILE * file = fopen("data.bin", "r");
+
+  for(int i=0; i < size; i++){
+  	int res = fread(&data, sizeof(float), 1, file);
+	if (res != 1){
+		res = errno;
+		fprintf(stderr, "fread failed to read the right amount of float: %s\n",strerror(res));
+		exit(EXIT_FAILURE);
+	}
+   	fprintf(stdout, "%.2f  ", data);
+  }
+	  
+  fclose(file);
+}
+
 int main(){
-  int size = 100;
+  int size = 40;
+  srand(time(NULL));
   prepare_data(size);
   return 0;
 }