diff --git a/edify/Android.mk b/edify/Android.mk
index fac0ba7..61ed6fa 100644
--- a/edify/Android.mk
+++ b/edify/Android.mk
@@ -23,6 +23,7 @@
 LOCAL_CFLAGS := $(edify_cflags) -g -O0
 LOCAL_MODULE := edify
 LOCAL_YACCFLAGS := -v
+LOCAL_CFLAGS += -Wno-unused-parameter
 
 include $(BUILD_HOST_EXECUTABLE)
 
@@ -34,6 +35,7 @@
 LOCAL_SRC_FILES := $(edify_src_files)
 
 LOCAL_CFLAGS := $(edify_cflags)
+LOCAL_CFLAGS += -Wno-unused-parameter
 LOCAL_MODULE := libedify
 
 include $(BUILD_STATIC_LIBRARY)
diff --git a/edify/expr.c b/edify/expr.c
index a2f1f99..79f6282 100644
--- a/edify/expr.c
+++ b/edify/expr.c
@@ -287,13 +287,11 @@
 
     long l_int = strtol(left, &end, 10);
     if (left[0] == '\0' || *end != '\0') {
-        printf("[%s] is not an int\n", left);
         goto done;
     }
 
     long r_int = strtol(right, &end, 10);
     if (right[0] == '\0' || *end != '\0') {
-        printf("[%s] is not an int\n", right);
         goto done;
     }
 
diff --git a/edify/expr.h b/edify/expr.h
index 0d8ed8f..a9ed2f9 100644
--- a/edify/expr.h
+++ b/edify/expr.h
@@ -164,6 +164,8 @@
 // Free a Value object.
 void FreeValue(Value* v);
 
+int parse_string(const char* str, Expr** root, int* error_count);
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif
diff --git a/edify/main.c b/edify/main.c
index 9e6bab7..b3fad53 100644
--- a/edify/main.c
+++ b/edify/main.c
@@ -30,9 +30,7 @@
 
     printf(".");
 
-    yy_scan_string(expr_str);
-    int error_count = 0;
-    error = yyparse(&e, &error_count);
+    int error_count = parse_string(expr_str, &e, &error_count);
     if (error > 0 || error_count > 0) {
         printf("error parsing \"%s\" (%d errors)\n",
                expr_str, error_count);
@@ -193,8 +191,7 @@
 
     Expr* root;
     int error_count = 0;
-    yy_scan_bytes(buffer, size);
-    int error = yyparse(&root, &error_count);
+    int error = parse_string(buffer, &root, &error_count);
     printf("parse returned %d; %d errors encountered\n", error, error_count);
     if (error == 0 || error_count > 0) {
 
diff --git a/edify/parser.y b/edify/parser.y
index 3f9ade1..f8fb2d1 100644
--- a/edify/parser.y
+++ b/edify/parser.y
@@ -29,6 +29,10 @@
 void yyerror(Expr** root, int* error_count, const char* s);
 int yyparse(Expr** root, int* error_count);
 
+struct yy_buffer_state;
+void yy_switch_to_buffer(struct yy_buffer_state* new_buffer);
+struct yy_buffer_state* yy_scan_string(const char* yystr);
+
 %}
 
 %locations
@@ -128,3 +132,8 @@
   printf("line %d col %d: %s\n", gLine, gColumn, s);
   ++*error_count;
 }
+
+int parse_string(const char* str, Expr** root, int* error_count) {
+    yy_switch_to_buffer(yy_scan_string(str));
+    return yyparse(root, error_count);
+}