diff --git a/ap/lib/libupi/inc/utils.h b/ap/lib/libupi/inc/utils.h
new file mode 100644
index 0000000..9ca07d9
--- /dev/null
+++ b/ap/lib/libupi/inc/utils.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _BUILD_TOOLS_APPLYPATCH_UTILS_H
+#define _BUILD_TOOLS_APPLYPATCH_UTILS_H
+
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <err.h>
+#include <fcntl.h>
+
+#ifndef _WIN32
+#include <unistd.h>
+#endif
+
+#define free_ptr(ptr) if(ptr!=NULL)free(ptr);ptr=NULL;
+#define close_fp(fp) if(fp!=NULL)fclose(fp);fp=NULL;
+#define safe_free(x) do { if(x) {free(x); x=NULL;} } while(0)
+
+#define GOERR_IF_FAIL(x)  do{if((x) < 0) goto  out_error;}while(0)
+
+#define GOERR_IF_NOK(x)  do{if((x) != 0) goto  out_error;}while(0)
+
+typedef unsigned int uint32_t;
+typedef int int32_t;
+typedef unsigned char u_char;
+typedef unsigned char uint8_t;
+
+#define MIN(x,y) (((x)<(y)) ? (x) : (y))
+#define MAX(x,y) (((x)>(y)) ? (x) : (y))
+
+#define safe_free(x) do { if(x) {free(x); x=NULL;} } while(0)
+
+#define log(fmt, args...) do {printf("[%s:%d]"fmt"\n", __FUNCTION__, __LINE__, ##args);}while(0)
+#define LOGD(fmt, args...) do {printf("[%s:%d]"fmt"\n", __FUNCTION__, __LINE__, ##args);}while(0)
+#define LOGE(fmt, args...) do {printf("[%s:%d]"fmt"\n", __FUNCTION__, __LINE__, ##args);}while(0)
+
+#define GOERR_IF_FAIL(x)  do{if((x) < 0) goto  out_error;}while(0)
+
+unsigned char * readfile(const char *dir, const char *name, size_t *len);
+int write_file(FILE* fp, const void *buf, int count);
+
+void dump_data(const u_char* data, int n);
+uint32_t little_endian_offin(u_char *buf);
+void little_endian_offout(uint32_t x, u_char *buf);
+FILE*  create_new_file(const char* name);
+char *dir_name(char * path);
+int write_file_by_path(const char*path, const char*value, int size);
+int read_file_by_path(const char*path, char*buf, int sz);
+
+// Read and write little-endian values of various sizes.
+
+void Write4(int value, FILE* f);
+void Write8(long long value, FILE* f);
+int Read2(void* p);
+int Read4(void* p);
+long long Read8(void* p);
+
+#endif //  _BUILD_TOOLS_APPLYPATCH_UTILS_H