char *GetMetricFilename(char typefaceNames[][68])

/* An unusual routine that uses the FindBaseName() function below.
   From four or less typeface names it extracts a family base name
   and appends ".metric" to it. If the typefaces belong to the 
   same family you get a filename "familyName.metric". If this
   function returns a null, these types don't belong together. 

   This function is overridden only if the user supplies an
   alternate .metric filename back in main().  */

{

static	char	familyName[68],baseNames[4][68];
static	int	match,index;

	match=1;
	familyName[0]=0;

	for (index=0;index<4;index++)
		strcpy(baseNames[index],FindBaseName(typefaceNames[index]));

	for (index=1;index<3;index++)
		if (strcmp(baseNames[index],baseNames[3])!=0)
			match=0;

	if (strcmp(baseNames[0],baseNames[3])!=0)
		if (strcmp(typefaceNames[0],baseNames[3])!=0)
			match=0;

	if (match!=0)
	{
		strcpy(familyName,baseNames[3]);
		strcat(familyName,".metric");
	}
	return(familyName);
};