environment variable names should be configurable

loadlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.50 2005/12/19 20:56:39 roberto Exp roberto $
+** $Id: loadlib.c,v 1.51 2005/12/29 15:32:11 roberto Exp roberto $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -22,10 +22,6 @@
 #include "lualib.h"
 
 
-/* environment variables that hold the search path for packages */
-#define LUA_PATH	"LUA_PATH"
-#define LUA_CPATH	"LUA_CPATH"
-
 /* prefix for open functions in C libraries */
 #define LUA_POF		"luaopen_"
 

lua.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.c,v 1.156 2005/12/29 12:30:16 roberto Exp roberto $
+** $Id: lua.c,v 1.157 2005/12/29 16:23:32 roberto Exp roberto $
 ** Lua stand-alone interpreter
 ** See Copyright Notice in lua.h
 */
@@ -306,12 +306,12 @@ static int runargs (lua_State *L, char **argv, int n) {
 
 
 static int handle_luainit (lua_State *L) {
-  const char *init = getenv("LUA_INIT");
+  const char *init = getenv(LUA_INIT);
   if (init == NULL) return 0;  /* status OK */
   else if (init[0] == '@')
     return dofile(L, init+1);
   else
-    return dostring(L, init, "=LUA_INIT");
+    return dostring(L, init, "=" LUA_INIT);
 }
 
 

luaconf.h

@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.80 2006/01/27 13:54:39 roberto Exp roberto $
+** $Id: luaconf.h,v 1.81 2006/02/10 17:44:06 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -59,6 +59,18 @@
 #endif
 
 
+/*
+@@ LUA_PATH and LUA_CPATH are the names of the environment variables that
+@* Lua check to set its paths.
+@@ LUA_INIT is the name of the environment variable that Lua
+@* checks for initialization code.
+** CHANGE them if you want different names.
+*/
+#define LUA_PATH        "LUA_PATH"
+#define LUA_CPATH       "LUA_CPATH"
+#define LUA_INIT	"LUA_INIT"
+
+
 /*
 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
 @* Lua libraries.
@@ -543,11 +555,25 @@
 /* On a Pentium, resort to a trick */
 #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
     (defined(__i386) || defined (_M_IX86) || defined(__i386__))
+
+/* On a Microsoft compiler, use assembler */
+#if defined(_MSC_VER)
+
+#define lua_number2int(i,d)   __asm fld d   __asm fistp i
+#define lua_number2integer(i,n)		lua_number2int(i, n)
+
+/* the next trick should work on any Pentium, but sometimes clashes
+   with a DirectX idiosyncrasy */
+#else
+
 union luai_Cast { double l_d; long l_l; };
 #define lua_number2int(i,d) \
   { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
 #define lua_number2integer(i,n)		lua_number2int(i, n)
 
+#endif
+
+
 /* this option always works, but may be slow */
 #else
 #define lua_number2int(i,d)	((i)=(int)(d))