From: Satoshi Nakagawa <snakagawa@...>
Date: 2007-08-23T20:06:22+09:00
Subject: [ruby-dev:31623] Re: strtod の精度


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中川です。

strtod の件で追加です。

gcc のソースを確認したところ、Mac OS X でしか __BIG_ENDIAN__ を
define してくれないようなので、CPU ごとのエンディアン判定を
わかる範囲で追加しました。

また、Win32 環境の判定がコンパイラ限定でうまくないので、型判定に
統合しました。

--
Satoshi Nakagawa
http://d.hatena.ne.jp/Psychs/



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Index: util.c
===================================================================
--- util.c	(revision 13236)
+++ util.c	(working copy)
@@ -814,6 +814,37 @@
  *	the result overflows to +-Infinity or underflows to 0.
  */
 
+#if !defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__)
+
+/* PA-RISC */
+#if defined(__hppa__) || defined(__hppa)
+#define __BIG_ENDIAN__
+#endif
+
+/* MIPS */
+#if defined(_MIPSEB) || defined(MIPSEB)
+#define __BIG_ENDIAN__
+#elif defined(_MIPSEL) || defined(MIPSEL)
+#define __LITTLE_ENDIAN__
+#endif
+
+/* Motorola 68000 */
+#if defined(__mc68000__) || defined(mc68000)
+#define __BIG_ENDIAN__
+#endif
+
+/* Power PC */
+#if defined(__powerpc__) || defined(__powerpc) || defined(__ppc__) || defined(__ppc) || defined(_M_PPC)
+#define __BIG_ENDIAN__
+#endif
+
+/* SPARC */
+#if defined(__sparc__) || defined(__sparc) || defined(sparc)
+#define __BIG_ENDIAN__
+#endif
+
+#endif
+
 #ifdef __BIG_ENDIAN__
 #define IEEE_BIG_ENDIAN
 #else
@@ -834,7 +865,14 @@
 #undef Long
 #undef ULong
 
-#if SIZEOF_INT == 4
+#if defined(__int32)
+#define Long __int32
+#define ULong unsigned __int32
+#if defined(__int64)
+#define Llong __int64
+#define ULLong unsigned __int64
+#endif
+#elif SIZEOF_INT == 4
 #define Long int
 #define ULong unsigned int
 #elif SIZEOF_LONG == 4
@@ -842,12 +880,6 @@
 #define ULong unsigned long int
 #endif
 
-#if defined(_MSC_VER) || defined(__BORLANDC__)
-#define Long __int32
-#define ULong unsigned __int32
-#define IEEE_LITTLE_ENDIAN
-#endif
-
 #ifdef DEBUG
 #include "stdio.h"
 #define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
@@ -927,7 +959,7 @@
 #endif
 
 #if defined(IEEE_LITTLE_ENDIAN) + defined(IEEE_BIG_ENDIAN) + defined(VAX) + defined(IBM) != 1
-Exactly one of IEEE_LITTLE_ENDIAN, IEEE_BIG_ENDIAN, VAX, or IBM should be defined.
+#error "Exactly one of IEEE_LITTLE_ENDIAN, IEEE_BIG_ENDIAN, VAX, or IBM should be defined."
 #endif
 
 typedef union { double d; ULong L[2]; } U;

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