- dyn_string_resize (ds, ds->length + s->length);
- strcpy (ds->s + ds->length, s->s);
- ds->length += s->length;
- return ds;
+ int i;
+
+ if (dyn_string_resize (dest, dest->length + 1) == NULL)
+ return 0;
+ /* Make room for the insertion. Be sure to copy the NUL. */
+ for (i = dest->length; i >= pos; --i)
+ dest->s[i + 1] = dest->s[i];
+ /* Add the new character. */
+ dest->s[pos] = c;
+ /* Compute the new length. */
+ ++dest->length;
+ return 1;
+}
+
+/* Append S to DS, resizing DS if necessary. Returns 1 on success.
+ On failure, if RETURN_ON_ALLOCATION_FAILURE, deletes DEST and
+ returns 0. */
+
+int
+dyn_string_append (dyn_string_t dest, dyn_string_t s)
+{
+ if (dyn_string_resize (dest, dest->length + s->length) == 0)
+ return 0;
+ strcpy (dest->s + dest->length, s->s);
+ dest->length += s->length;
+ return 1;