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WebSVN – planix.SVN – Blame – /os/branches/feature_tlsv12/sys/src/ape/lib/ap/stdio/fseeko.c – Rev 2

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/*
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 * pANS stdio -- fseeko
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 */
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#include "iolib.h"
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int fseeko(FILE *f, off_t offs, int type){
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	switch(f->state){
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	case ERR:
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	case CLOSED:
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		return -1;
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	case WR:
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		fflush(f);
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		break;
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	case RD:
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		if(type==1 && f->buf!=f->unbuf)
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			offs-=f->wp-f->rp;
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		break;
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	}
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	if(f->flags&STRING || lseek(f->fd, offs, type)==-1)
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		return -1;
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	if(f->state==RD) f->rp=f->wp=f->buf;
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	if(f->state!=OPEN)
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		f->state=RDWR;
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	return 0;
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}