Squashed 'vendor/compat53/' changes from bc91f40..daebe77

daebe77 Fix feature test for C11 Annex K (strerror_s).
d48f7f5 Provide strict lua_tointegerx for Lua 5.2 as well.
340f2f4 lua_tointeger(x) rejects non-ints for Lua 5.1.
30077d2 Verify that lua_getuservalue returns type.

git-subtree-dir: vendor/compat53
git-subtree-split: daebe77a2f498817713df37f0bb316db1d82222f

1 files changed, 18 insertions, 11 deletions

diff --git a/c-api/compat-5.3.c b/c-api/compat-5.3.c
index b82c654..bf81673 100644
--- a/c-api/compat-5.3.c
+++ b/c-api/compat-5.3.c
@@ -37,8 +37,8 @@
 #endif /* strerror_r */
 
 #ifndef COMPAT53_HAVE_STRERROR_S
-#  if defined(_MSC_VER) || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
-      (defined(__STDC_LIB_EXT1__) && __STDC_LIB_EXT1__)
+#  if defined(_MSC_VER) || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && \
+      defined(__STDC_LIB_EXT1__) && __STDC_LIB_EXT1__)
 #    define COMPAT53_HAVE_STRERROR_S 1
 #  else /* not VC++ or C11 */
 #    define COMPAT53_HAVE_STRERROR_S 0
@@ -204,15 +204,6 @@ COMPAT53_API void lua_rawsetp (lua_State *L, int i, const void *p) {
 }
 
 
-COMPAT53_API lua_Integer lua_tointegerx (lua_State *L, int i, int *isnum) {
-  lua_Integer n = lua_tointeger(L, i);
-  if (isnum != NULL) {
-    *isnum = (n != 0 || lua_isnumber(L, i));
-  }
-  return n;
-}
-
-
 COMPAT53_API lua_Number lua_tonumberx (lua_State *L, int i, int *isnum) {
   lua_Number n = lua_tonumber(L, i);
   if (isnum != NULL) {
@@ -740,6 +731,22 @@ COMPAT53_API int lua_isinteger (lua_State *L, int index) {
 }
 
 
+COMPAT53_API lua_Integer lua_tointegerx (lua_State *L, int i, int *isnum) {
+  int ok = 0;
+  lua_Number n = lua_tonumberx(L, i, &ok);
+  if (ok) {
+    if (n == (lua_Integer)n) {
+      if (isnum)
+        *isnum = 1;
+      return (lua_Integer)n;
+    }
+  }
+  if (isnum)
+    *isnum = 0;
+  return 0;
+}
+
+
 static void compat53_reverse (lua_State *L, int a, int b) {
   for (; a < b; ++a, --b) {
     lua_pushvalue(L, a);