Function acl_vstring_insert

lib_acl/src/stdlib/acl_vstring.c:773–808

/* acl_vstring_insert - insert text into string */

ACL_VSTRING *acl_vstring_insert(ACL_VSTRING *vp, size_t start,
	const char *buf, size_t len)
{
	const char *myname = "acl_vstring_insert";
	size_t new_len, n;

	/*
	 * Sanity check.
	 */
	if (start >= ACL_VSTRING_LEN(vp)) {
		acl_msg_panic("%s(%d): bad start %ld",
			myname, __LINE__, (long) start);
	}

	/*
	 * Move the existing content and copy the new content.
	 */
	new_len = ACL_VSTRING_LEN(vp) + len;
	ACL_VSTRING_SPACE(vp, (ssize_t) len);

	n = acl_vstring_avail(vp);
	if (len > (size_t) n) {
		len = n;
	}

	if (len > 0) {
		memmove(acl_vstring_str(vp) + start + len,
			acl_vstring_str(vp) + start,
			ACL_VSTRING_LEN(vp) - start);
		memcpy(acl_vstring_str(vp) + start, buf, len);
		ACL_VSTRING_AT_OFFSET(vp, (int) new_len);
		ACL_VSTRING_TERMINATE(vp);
	}

	return vp;
}

/* acl_vstring_prepend - prepend text to string */