read from rb or mtx depending on extension

src/main.c

@@ -3,6 +3,7 @@
 #include "matrix_operation.h"
 #include "sparse_matrix.h"
 #include "read_from_mtx.h"
+#include "read_from_rb.h"
 #include "vector.h"
 #include "power_algorithm.h"
 #include "gauss_seidel.h"
@@ -14,7 +15,15 @@ void test_stationary_distribution(const char *path, double epsilon, double alpha
     struct timeval tvstart, tvend;
 
     gettimeofday(&tvstart, NULL);
-    SparseMatrix *matrix = read_sparse_matrix_from_mtx(path);
+
+    SparseMatrix *matrix = NULL;
+    const char *extension = strrchr(path, '.');
+    if (extension && strcasecmp(extension, ".rb") == 0) {
+        matrix = read_sparse_matrix_from_rb(path);
+    } else {
+        matrix = read_sparse_matrix_from_mtx(path);
+    }
+
     convert_to_stochastic(matrix);
     gettimeofday(&tvend, NULL);
     print_time_diff("Read and convert matrix", &tvstart, &tvend);