GNUmifluz: DB_ADDSTR

{ \
 if ((add) != NULL) { \
 /* If leading slash, start over. */ \
 if (CDB___os_abspath(add)) { \
 p = str; \
 slash = 0; \
 } \
 /* Append to the current string. */ \
 len = strlen(add); \
 if (slash) \
 *p++ = PATH_SEPARATOR[0]; \
 memcpy(p, add, len); \
 p += len; \
 slash = strchr(PATH_SEPARATOR, p[-1]) == NULL; \
 } \
}