ref: 4d919ab612f61c1ef1b21d41513f264d57c010d4
dir: /sys/src/ape/lib/ap/stdio/fflush.c/
/* * pANS stdio -- fflush */ #include "iolib.h" int fflush(FILE *f){ int error, cnt; if(f==NULL){ error=0; for(f=_IO_stream;f!=&_IO_stream[FOPEN_MAX];f++) if(f->state==WR && fflush(f)==EOF) error=EOF; return error; } if(f->flags&STRING) return EOF; switch(f->state){ default: /* OPEN RDWR EOF RD */ return 0; case CLOSED: case ERR: return EOF; case WR: cnt=(f->flags&LINEBUF?f->lp:f->wp)-f->buf; if(cnt && write(f->fd, f->buf, cnt)!=cnt){ if(f->state!=CLOSED) f->state=ERR; return EOF; } f->rp=f->wp=f->buf; f->state=RDWR; return 0; } }