/*
 *			c o n c a t . c
 */

/*)LIBRARY
*/

#ifdef	DOCUMENTATION

title	concat	Concatenate Strings
index		Concatenate strings

synopsis
	.s.nf
	char *
	concat(out, in0, in1, ..., inN, 0);
	char		*out;
	char		*in0, in1, ... inN;
	.s.f
Description

	Concat concatenates the argument strings.  It returns a
	pointer to the first byte of out.

Bugs

	May not be transportable

#endif

#define	EOS	0
#define	NULL	0

char *
concat(out, inlist)
char		*out;
char		*inlist;
/*
 * Concatenate strings.  Somewhat of a hack.
 */
{
	register char	*op;
	register char	**argp;
	register char	*inp;

	op = out;
	for (argp = &inlist; (inp = *argp++) != NULL;) {
	    while ((*op++ = *inp++) != EOS)
		;
	    op--;	/* Backup to overwrite the EOS			*/
	}
	*op = EOS;	/* Terminate output string even with null args	*/
	return (out);
}