lua

commit 502214f8a551cd01d94677f98a40aa51531ef71d
parent ed19fe766cf833e80236a6aaec63137744f60562
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Tue, 25 Aug 2015 15:50:11 -0300

added assert for NULL pointer in 'lua_pushlstring'

Diffstat:
M
lapi.c
 | 
7
++++++-

1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/lapi.c b/lapi.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 2.252 2015/08/03 19:50:49 roberto Exp roberto $
+** $Id: lapi.c,v 2.253 2015/08/03 20:40:26 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -471,10 +471,15 @@ LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) {
 }
 
 
+/*
+** Pushes on the stack a string with given length. Even when 'len' == 0,
+** 's' cannot be NULL due to later use of 'memcmp' and 'memcpy'.
+*/
 LUA_API const char *lua_pushlstring (lua_State *L, const char *s, size_t len) {
   TString *ts;
   lua_lock(L);
   luaC_checkGC(L);
+  api_check(L, s != NULL, "pointer cannot be NULL");
   ts = luaS_newlstr(L, s, len);
   setsvalue2s(L, L->top, ts);
   api_incr_top(L);