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/*
* add.c -- If "s1" is NULL, this routine just creates a
* -- copy of "s2" into newly malloc'ed memory.
* --
* -- If "s1" is not NULL, then copy the concatenation
* -- of "s1" and "s2" (note the order) into newly
* -- malloc'ed memory. Then free "s1".
*
* $Id: add.c,v 1.1.1.1 1999/04/30 18:08:34 doug Exp $
*/
#include <h/mh.h>
char *
add (char *s2, char *s1)
{
char *cp;
size_t len1 = 0, len2 = 0;
if (s1)
len1 = strlen (s1);
if (s2)
len2 = strlen (s2);
if (!(cp = malloc (len1 + len2 + 1)))
adios (NULL, "unable to allocate string storage");
/* Copy s1 and free it */
if (s1) {
memcpy (cp, s1, len1);
free (s1);
}
/* Copy s2 */
if (s2)
memcpy (cp + len1, s2, len2);
/* Now NULL terminate the string */
cp[len1 + len2] = '\0';
return cp;
}
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