new version by lhf

1 files changed, 21 insertions, 17 deletions

diff --git a/lundump.h b/lundump.h
index 7e5b286c..d9bc8668 100644
--- a/lundump.h
+++ b/lundump.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.h,v 1.5 1998/02/06 20:05:39 lhf Exp lhf $
+** $Id: lundump.h,v 1.6 1998/06/13 16:54:15 lhf Exp $
 ** load pre-compiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -22,32 +22,36 @@ TProtoFunc* luaU_undump1(ZIO* Z);	/* load one chunk */
 #define ID_STR          'S'
 #define ID_FUN          'F'
 
-#define ID_INT4         'l'
-#define ID_REAL4        'f'
-#define ID_REAL8        'd'
-#define ID_NATIVE       '?'
+/* number representation */
+#define ID_INT4         'l'             /* 4-byte integers */
+#define ID_REAL4        'f'             /* 4-byte reals */
+#define ID_REAL8        'd'             /* 8-byte reals */
+#define ID_NATIVE       '?'             /* whatever your machine uses */
 
 /*
 * use a multiple of PI for testing number representation.
-* multiplying by 10E8 gives notrivial integer values.
+* multiplying by 1E8 gives notrivial integer values.
 */
 #define TEST_NUMBER     3.14159265358979323846E8
 
-/* LUA_NUMBER */
-/* if you change the definition of real, make sure you set ID_NUMBER
-* accordingly, specially if sizeof(long)!=4.
+/* LUA_NUMBER
+* choose one below for the number representation in precompiled chunks.
+* the default is ID_REAL8 because the default for LUA_NUM_TYPE is double.
+* if your machine does not use IEEE 754, use ID_NATIVE.
+* the next version will support conversion to/from IEEE 754.
+*
+* if you change LUA_NUM_TYPE, make sure you set ID_NUMBER accordingly,
+* specially if sizeof(long)!=4.
 * for types other than the ones listed below, you'll have to write your own
 * dump and undump routines.
 */
 
-#if real==float
-        #define ID_NUMBER       ID_REAL4
-#elif real==double
-        #define ID_NUMBER       ID_REAL8
-#elif real==long
-        #define ID_NUMBER       ID_INT4
-#else
-        #define ID_NUMBER       ID_NATIVE
+#define ID_NUMBER       ID_REAL8
+
+#if 0
+#define ID_NUMBER       ID_REAL4
+#define ID_NUMBER       ID_INT4
+#define ID_NUMBER       ID_NATIVE
 #endif
 
 #endif