generate output filename

src/rvprof_utils.c

@@ -43,4 +43,27 @@ char* rvprof_utils_get_program_name(void){
     
     // option 4: fallback
     return "unknown_program";
-}
+}
+
+char* rvprof_utils_generate_output_filename(void){
+    if (g_rvprof.config.output_filename) {
+        return g_rvprof.config.output_filename;
+    }
+    
+    const char* prog_name = rvprof_utils_get_program_name();
+    size_t name_len = strlen(prog_name);
+    const char* suffix = "_rvprof.log";
+    size_t suffix_len = strlen(suffix);
+    
+    char* filename = rvprof_malloc(name_len + suffix_len + 1);
+    if (filename) {
+        strcpy(filename, prog_name);
+        strcat(filename, suffix);
+        g_rvprof.config.output_filename = filename;
+        return filename;
+    }
+    
+    // fallback
+    return "rvprof_output.log";
+}
+