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/*
* pANS stdio -- fread
*/
#include "iolib.h"
#include <string.h>
#define BIGN (BUFSIZ/2)
size_t fread(void *p, size_t recl, size_t nrec, FILE *f){
char *s;
int n, d, c;
s=(char *)p;
n=recl*nrec;
while(n>0){
d=f->wp-f->rp;
if(d>0){
if(d>n)
d=n;
memcpy(s, f->rp, d);
f->rp+=d;
}else{
if(n >= BIGN && f->state==RD && !(f->flags&STRING) && f->buf!=f->unbuf){
d=read(f->fd, s, n);
if(d<=0){
f->state=(d==0)?END:ERR;
goto ret;
}
}else{
c=_IO_getc(f);
if(c==EOF)
goto ret;
*s=c;
d=1;
}
}
s+=d;
n-=d;
}
ret:
if(recl)
return (s-(char*)p)/recl;
else
return s-(char*)p;
}
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