From c7af2710007865861e789b29e803f0f55deba93f Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 4 Apr 2013 19:57:23 -0400
Subject: [PATCH] eliminate bits/wchar.h

the preprocessor can reliably determine the signedness of wchar_t.
L'\0' is used for 0 in the expressions so that, if the underlying type
of wchar_t is long rather than int, the promoted type of the
expression will match the type of wchar_t.
---
 arch/arm/bits/wchar.h        | 4 ----
 arch/i386/bits/wchar.h       | 4 ----
 arch/microblaze/bits/wchar.h | 4 ----
 arch/mips/bits/wchar.h       | 4 ----
 arch/powerpc/bits/wchar.h    | 4 ----
 arch/x86_64/bits/wchar.h     | 4 ----
 include/stdint.h             | 9 ++++++++-
 include/wchar.h              | 8 +++++++-
 8 files changed, 15 insertions(+), 26 deletions(-)
 delete mode 100644 arch/arm/bits/wchar.h
 delete mode 100644 arch/i386/bits/wchar.h
 delete mode 100644 arch/microblaze/bits/wchar.h
 delete mode 100644 arch/mips/bits/wchar.h
 delete mode 100644 arch/powerpc/bits/wchar.h
 delete mode 100644 arch/x86_64/bits/wchar.h

diff --git a/arch/arm/bits/wchar.h b/arch/arm/bits/wchar.h
deleted file mode 100644
index ffb26917..00000000
--- a/arch/arm/bits/wchar.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef WCHAR_MIN
-#define WCHAR_MIN 0U
-#define WCHAR_MAX 0xffffffffU
-#endif
diff --git a/arch/i386/bits/wchar.h b/arch/i386/bits/wchar.h
deleted file mode 100644
index c969c5b6..00000000
--- a/arch/i386/bits/wchar.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef WCHAR_MIN
-#define WCHAR_MIN (-1-0x7fffffff)
-#define WCHAR_MAX (0x7fffffff)
-#endif
diff --git a/arch/microblaze/bits/wchar.h b/arch/microblaze/bits/wchar.h
deleted file mode 100644
index c969c5b6..00000000
--- a/arch/microblaze/bits/wchar.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef WCHAR_MIN
-#define WCHAR_MIN (-1-0x7fffffff)
-#define WCHAR_MAX (0x7fffffff)
-#endif
diff --git a/arch/mips/bits/wchar.h b/arch/mips/bits/wchar.h
deleted file mode 100644
index ffb26917..00000000
--- a/arch/mips/bits/wchar.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef WCHAR_MIN
-#define WCHAR_MIN 0U
-#define WCHAR_MAX 0xffffffffU
-#endif
diff --git a/arch/powerpc/bits/wchar.h b/arch/powerpc/bits/wchar.h
deleted file mode 100644
index c969c5b6..00000000
--- a/arch/powerpc/bits/wchar.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef WCHAR_MIN
-#define WCHAR_MIN (-1-0x7fffffff)
-#define WCHAR_MAX (0x7fffffff)
-#endif
diff --git a/arch/x86_64/bits/wchar.h b/arch/x86_64/bits/wchar.h
deleted file mode 100644
index c969c5b6..00000000
--- a/arch/x86_64/bits/wchar.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef WCHAR_MIN
-#define WCHAR_MIN (-1-0x7fffffff)
-#define WCHAR_MAX (0x7fffffff)
-#endif
diff --git a/include/stdint.h b/include/stdint.h
index 7ca9d76b..486d1ac2 100644
--- a/include/stdint.h
+++ b/include/stdint.h
@@ -78,7 +78,14 @@ typedef unsigned long long uintmax_t;
 #define WINT_MIN INT32_MIN
 #define WINT_MAX INT32_MAX
 
-#include <bits/wchar.h>
+#if L'\0'-1 > 0
+#define WCHAR_MAX (0xffffffffu+L'\0')
+#define WCHAR_MIN (0+L'\0')
+#else
+#define WCHAR_MAX (0x7fffffff+L'\0')
+#define WCHAR_MIN (-1-0x7fffffff+L'\0')
+#endif
+
 #include <bits/stdint.h>
 
 #endif
diff --git a/include/wchar.h b/include/wchar.h
index 9ceddd57..d8738818 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -24,7 +24,13 @@ extern "C" {
 
 #include <bits/alltypes.h>
 
-#include <bits/wchar.h>
+#if L'\0'-1 > 0
+#define WCHAR_MAX (0xffffffffu+L'\0')
+#define WCHAR_MIN (0+L'\0')
+#else
+#define WCHAR_MAX (0x7fffffff+L'\0')
+#define WCHAR_MIN (-1-0x7fffffff+L'\0')
+#endif
 
 #define NULL 0L