#include "lib9.h"#include "draw.h"#include "memdraw.h" Memsubfont*openmemsubfont(char *name){	Memsubfont *sf;	Memimage *i;	Fontchar *fc;	int fd, n;	char hdr[3*12+4+1];	uchar *p = nil; 	fd = open(name, OREAD);	if(fd < 0)		return nil;	i = readmemimage(fd);	if(i == nil)		goto Err;	if(read(fd, hdr, 3*12) != 3*12){		werrstr("openmemsubfont: header read error: %r");		goto Err;	}	n = atoi(hdr);	p = malloc(6*(n+1));	if(p == nil)		goto Err;	if(read(fd, p, 6*(n+1)) != 6*(n+1)){		werrstr("openmemsubfont: fontchar read error: %r");		goto Err;	}	fc = malloc(sizeof(Fontchar)*(n+1));	if(fc == nil)		goto Err;	_unpackinfo(fc, p, n);	sf = allocmemsubfont(name, n, atoi(hdr+12), atoi(hdr+24), fc, i);	if(sf == nil){		free(fc);		goto Err;	}	free(p);	return sf;Err:	close(fd);	if (i != nil)		freememimage(i);	if (p != nil)		free(p);	return nil;}