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/*
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 * pANS stdio -- fwrite
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 */
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#include "iolib.h"
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#include <string.h>
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#define BIGN (BUFSIZ/2)
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size_t fwrite(const void *p, size_t recl, size_t nrec, FILE *f){
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	char *s;
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	int n, d;
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	s=(char *)p;
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	n=recl*nrec;
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	while(n>0){
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		d=f->rp-f->wp;
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		if(d>0){
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			if(d>n)
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				d=n;
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			memcpy(f->wp, s, d);
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			f->wp+=d;
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		}else{
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			if(n>=BIGN && f->state==WR && !(f->flags&(STRING|LINEBUF)) && f->buf!=f->unbuf){
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				d=f->wp-f->buf;
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				if(d>0){
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					if(f->flags&APPEND)
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						lseek(f->fd, 0L, SEEK_END);
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					if(write(f->fd, f->buf, d)!=d){
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						f->state=ERR;
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						goto ret;
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					}
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					f->wp=f->rp=f->buf;
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				}
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				if(f->flags&APPEND)
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					lseek(f->fd, 0L, SEEK_END);
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				d=write(f->fd, s, n);
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				if(d<=0){
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					f->state=ERR;
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					goto ret;
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				}
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			}else{
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				if(_IO_putc(*s, f)==EOF)
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					goto ret;
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				d=1;
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			}
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		}
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		s+=d;
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		n-=d;
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	}
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    ret:
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	if(recl)
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		return (s-(char*)p)/recl;
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	else
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		return s-(char*)p;
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}