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