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- /*
- * pANS stdio -- fread
- */
- #include "iolib.h"
- #define BIGN (BUFSIZ/2)
- long fread(void *p, long recl, long 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;
- memmove(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:
- return (s-(char *)p)/(recl?recl:1);
- }
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