From: Tomas Krizek <tomas.krizek@nic.cz>
Date: Mon, 22 Nov 2021 16:52:19 +0000 (+0100)
Subject: kluautil: kr_string2c function
X-Git-Tag: v5.5.0~26^2~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66ba783b4a443bee88d6cb6996f23a67a86ecf02;p=thirdparty%2Fknot-resolver.git

kluautil: kr_string2c function
---

diff --git a/daemon/lua/kluautil.lua b/daemon/lua/kluautil.lua
index e73e952cf..d8569b9a2 100644
--- a/daemon/lua/kluautil.lua
+++ b/daemon/lua/kluautil.lua
@@ -1,5 +1,6 @@
 -- SPDX-License-Identifier: GPL-3.0-or-later
 
+local ffi = require('ffi')
 local kluautil = {}
 
 -- Get length of table
@@ -79,6 +80,15 @@ function kluautil.kr_https_fetch(url, out_file, ca_file)
 	return true
 end
 
+-- Copy a lua string to C (to knot_mm_t or nil=malloc, zero-terminated).
+function kluautil.kr_string2c(str, mempool)
+	if str == nil then return nil end
+	local result = ffi.C.mm_realloc(mempool, nil, #str + 1, 0)
+	if result == nil then panic("not enough memory") end
+	ffi.copy(result, str)
+	return ffi.cast('const char *', result)
+end
+
 kluautil.list_dir = kluautil_list_dir
 
 return kluautil