#include <string.h> #include "ioprivate.h"  size_t fwrite(const void *restrict buf, size_t eltsize, size_t nelts,		FILE *restrict f){	size_t totsize = eltsize * nelts; 	// Check for space in the output buffer.	if (f->opos + totsize > f->omax) { 		// Create/flush the output buffer.		if (__getospace(f) < 0)			return EOF; 		if (totsize >= f->omax) { 			// Bigger than the buffer - just write it directly.			if (__writebuf(f, buf, totsize) < 0)				return 0;			return nelts;		}	} 	// Copy the data to the output buffer.	memcpy(&f->obuf[f->opos], buf, totsize);	f->opos += totsize; 	// Flush the buffer if appropriate.	if ((f->bufmode == _IOLBF && memchr(buf, '\n', totsize)) ||			(f->bufmode == _IONBF)) {		if (fflush(f) < 0)			return 0;	} 	return nelts;}