13e12c5d1SDavid du Colombier /* 23e12c5d1SDavid du Colombier * pANS stdio -- _IO_getc 33e12c5d1SDavid du Colombier */ 43e12c5d1SDavid du Colombier #include "iolib.h" _IO_getc(FILE * f)53e12c5d1SDavid du Colombierint _IO_getc(FILE *f){ 63e12c5d1SDavid du Colombier int cnt; 73e12c5d1SDavid du Colombier switch(f->state){ 83e12c5d1SDavid du Colombier default: /* CLOSED, WR, ERR, EOF */ 93e12c5d1SDavid du Colombier return EOF; 103e12c5d1SDavid du Colombier case OPEN: 113e12c5d1SDavid du Colombier _IO_setvbuf(f); 123e12c5d1SDavid du Colombier case RDWR: 133e12c5d1SDavid du Colombier case RD: 143e12c5d1SDavid du Colombier if(f->flags&STRING) return EOF; 153e12c5d1SDavid du Colombier cnt=read(f->fd, f->buf, f->buf==f->unbuf?1:f->bufl); 163e12c5d1SDavid du Colombier switch(cnt){ 173e12c5d1SDavid du Colombier case -1: f->state=ERR; return EOF; 183e12c5d1SDavid du Colombier case 0: f->state=END; return EOF; 193e12c5d1SDavid du Colombier default: 203e12c5d1SDavid du Colombier f->state=RD; 213e12c5d1SDavid du Colombier f->rp=f->buf; 223e12c5d1SDavid du Colombier f->wp=f->buf+cnt; 23*22df390cSDavid du Colombier return *f->rp++; 243e12c5d1SDavid du Colombier } 253e12c5d1SDavid du Colombier } 263e12c5d1SDavid du Colombier } 27