工程思維：基本變量typedef重命名

定義common.h文件，其他c文件要用這些基本定義時可以直接在文件頭加上#include "common.h"引用該.h文件即可。

#ifndef COMMON_H
#define COMMON_H

typedef void      GF_VOID;
typedef NULL      GF_NULL;

typedef char      GF_CHAR;
typedef char      GF_INT8;
typedef short     GF_INT16;
typedef int       GF_INT32;
typedef long      GF_LONG32;
typedef long long GF_LONG64;
typedef float     GF_FLOAT32;
typedef double    GF_DOUBLE64;

typedef unsigned char      GF_UCHAR;
typedef unsigned char      GF_UINT8;
typedef unsigned short     GF_UINT16;
typedef unsigned int       GF_UINT32;
typedef unsigned long      GF_ULONG32;
typedef unsigned long long GF_ULONG64;

#endif