Add an implementation of `lua_getextraspace()`.

2 files changed, 31 insertions, 4 deletions

diff --git a/tests/test.lua b/tests/test.lua
index c2c0abf..9bb08da 100755
--- a/tests/test.lua
+++ b/tests/test.lua
@@ -664,14 +664,12 @@ print("isinteger", mod.isinteger(12.3))
 print("isinteger", mod.isinteger(math.huge))
 print("isinteger", mod.isinteger(math.sqrt(-1)))
 
-
 ___''
 print("rotate", mod.rotate(1, 1, 2, 3, 4, 5, 6))
 print("rotate", mod.rotate(-1, 1, 2, 3, 4, 5, 6))
 print("rotate", mod.rotate(4, 1, 2, 3, 4, 5, 6))
 print("rotate", mod.rotate(-4, 1, 2, 3, 4, 5, 6))
 
-
 ___''
 print("strtonum", mod.strtonum("+123"))
 print("strtonum", mod.strtonum(" 123 "))
@@ -679,7 +677,6 @@ print("strtonum", mod.strtonum("-1.23"))
 print("strtonum", mod.strtonum(" 123 abc"))
 print("strtonum", mod.strtonum("jkl"))
 
-
 ___''
 local a, b, c = mod.requiref()
 print("requiref", type(a), type(b), type(c),
@@ -687,6 +684,20 @@ print("requiref", type(a), type(b), type(c),
       type(requiref1), type(requiref2), type(requiref3))
 
 ___''
+mod.extraspace("abc")
+print("getextraspace", mod.extraspace("xyz"))
+local c = coroutine.wrap(function()
+  print("getextraspace", mod.extraspace("uvw"))
+  print("getextraspace", mod.extraspace("123"))
+  coroutine.yield()
+  print("getextraspace", mod.extraspace("asd"))
+end)
+c()
+print("getextraspace", mod.extraspace("456"))
+c()
+print("getextraspace", mod.extraspace("789"))
+
+___''
 local proxy, backend = {}, {}
 setmetatable(proxy, { __index = backend, __newindex = backend })
 print("geti/seti", rawget(proxy, 1), rawget(backend, 1))
@@ -705,7 +716,7 @@ print("tonumber", mod.tonumber("error"))
 
 ___''
 print("tointeger", mod.tointeger(12))
-print("tointeger", mod.tointeger(-12))
+print("tointeger", mod.tointeger(12))
 print("tointeger", mod.tointeger(12.1))
 print("tointeger", mod.tointeger(12.9))
 print("tointeger", mod.tointeger(-12.1))
diff --git a/tests/testmod.c b/tests/testmod.c
index cd56e76..345a8c9 100644
--- a/tests/testmod.c
+++ b/tests/testmod.c
@@ -63,6 +63,21 @@ static int test_getseti (lua_State *L) {
 }
 
 
+#ifndef LUA_EXTRASPACE
+#define LUA_EXTRASPACE (sizeof(void*))
+#endif
+
+static int test_getextraspace (lua_State *L) {
+  size_t len = 0;
+  char const* s = luaL_optlstring(L, 1, NULL, &len);
+  void* p = lua_getextraspace(L);
+  lua_pushstring(L, p);
+  if (s)
+    memcpy(p, s, len > LUA_EXTRASPACE-1 ? LUA_EXTRASPACE-1 : len+1);
+  return 1;
+}
+
+
 /* additional tests for Lua5.1 */
 #define NUP 3
 
@@ -307,6 +322,7 @@ static const luaL_Reg funcs[] = {
   { "strtonum", test_str2num },
   { "requiref", test_requiref },
   { "getseti", test_getseti },
+  { "extraspace", test_getextraspace },
   { "newproxy", test_newproxy },
   { "arith", test_arith },
   { "compare", test_compare },