OFF
typedef _IO_off64_t (*_IO_seekoff_t) (_IO_FILE *FP, _IO_off64_t OFF, int DIR,
#define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE)
#define _IO_WSEEKOFF(FP, OFF, DIR, MODE) WJUMP3 (__seekoff, FP, OFF, DIR, MODE)
tmp = ix - OFF;
tmp = ix - OFF;
tmp = ix - OFF;
tmp = ix - OFF;
tmp = ix - OFF;
tmp = ix - OFF;