ref: 5c448c618a89ab8933838da1b5b97ed7c4a42e08
dir: /sys/src/ape/lib/ap/stdio/fseeko.c/
/* * pANS stdio -- fseeko */ #include "iolib.h" int fseeko(FILE *f, off_t offs, int type){ switch(f->state){ case ERR: case CLOSED: return -1; case WR: fflush(f); break; case RD: if(type==1 && f->buf!=f->unbuf) offs-=f->wp-f->rp; break; } if(f->flags&STRING || lseek(f->fd, offs, type)==-1) return -1; if(f->state==RD) f->rp=f->wp=f->buf; if(f->state!=OPEN) f->state=RDWR; return 0; }