/*
 * This C file is not a compilation unit in itself, but is the common piece
 * (a set of static variables and functions) included in the librftab modules
 * responsible for reading different kinds of ASCII tables.
 */

#define	MAX_FIELDS_PER_LINE	64

static char *filename;
static FILE *rdfile;
static unsigned lineno;
static char linebuf[256], *line_fields[MAX_FIELDS_PER_LINE];
static unsigned line_nfields, line_field_ptr;

static int
read_line()
{
	char *cp;

	if (!fgets(linebuf, sizeof linebuf, rdfile))
		return(0);
	lineno++;
	cp = linebuf;
	for (line_nfields = 0; ; ) {
		while (isspace(*cp))
			cp++;
		if (*cp == '\0' || *cp == '#')
			break;
		if (line_nfields >= MAX_FIELDS_PER_LINE) {
			printf("%s line %d: too many fields on one line\n",
				filename, lineno);
			return(-1);
		}
		line_fields[line_nfields++] = cp;
		while (*cp && !isspace(*cp))
			cp++;
		if (*cp)
			*cp++ = '\0';
	}
	return(1);
}

static
get_field(retp)
	char **retp;
{
	int rc;

	if (line_field_ptr < line_nfields) {
		*retp = line_fields[line_field_ptr++];
		return(1);
	}
	do {
		rc = read_line();
		if (rc <= 0)
			return(rc);
	} while (!line_nfields);
	*retp = line_fields[0];
	line_field_ptr = 1;
	return(1);
}