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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=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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}