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