一个assert的写法

 char assert_buf[];
 int assert_buf_len;

 #ifdef XXX_DEBUG
 #define assert(expr, ...) \
 do{    \
     if ((!(expr))) \
     {\
         char *str = __FILE__; \
         int i; \
         for(i=strlen(str);i>=;i--) if(str[i]=='\\'||str[i]=='/') break; \
         printf("ASSERTION FAILED (%s) at: %s:%d:: ", #expr, str+i+, __LINE__);\
         assert_buf_len = snprintf(assert_buf, sizeof(assert_buf)-, __VA_ARGS__);\
         printf("%s\r\n", assert_buf);\
     }\
 } while ()
 #else
 #define assert(expr, ...) do{ \
 }while()
 #endif