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- /*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
- /*
- * pANS stdio -- _IO_getc
- */
- #include "iolib.h"
- int _IO_getc(FILE *f){
- int cnt;
- switch(f->state){
- default: /* CLOSED, WR, ERR, EOF */
- return EOF;
- case OPEN:
- _IO_setvbuf(f);
- case RDWR:
- case RD:
- if(f->flags&STRING) return EOF;
- cnt=read(f->fd, f->buf, f->buf==f->unbuf?1:f->bufl);
- switch(cnt){
- case -1: f->state=ERR; return EOF;
- case 0: f->state=END; return EOF;
- default:
- f->state=RD;
- f->rp=f->buf;
- f->wp=f->buf+cnt;
- return (*f->rp++)&_IO_CHMASK;
- }
- }
- }
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