uchar/wchar/wctype: reorganize definitions

uchar.h: only define char32_t and char16_t before c++11

found while testing libc++
https://en.cppreference.com/cpp/keyword/char16_t
https://en.cppreference.com/cpp/keyword/char32_t

add _wint_t.h and _mbstate_t.h
Change-Id: Ia5529cc9aa7316e091297f9842c3007a855f813e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/11346
Reviewed-by: Adrien Destugues <[email protected]>
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: Jérôme Duval <[email protected]>
(cherry picked from commit bf1e1da47d6181dbf8122bc52801c08968e1a4ed)
Reviewed-on: https://review.haiku-os.org/c/haiku/+/11374
Reviewed-by: waddlesplash <[email protected]>

headers/posix/_mbstate_t.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2008-2012 Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef __MBSTATE_T_H
+#define __MBSTATE_T_H
+
+
+#include <stddef.h>
+
+
+typedef struct {
+	void* converter;
+	char charset[64];
+	unsigned int count;
+	char data[1024 + 8];	/* 1024 bytes for data, 8 for alignment space */
+} mbstate_t;
+
+
+#endif /* __MBSTATE_T_H */

headers/posix/_wint_t.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2008-2012 Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef __WINT_T_H
+#define __WINT_T_H
+
+
+#include <stddef.h>
+
+
+/* stddef.h is not supposed to define wint_t, but gcc 2.95.3's one does.
+ * In all other cases we will do that. */
+#ifndef _WINT_T
+#define _WINT_T
+
+#ifndef __WINT_TYPE__
+#define __WINT_TYPE__ unsigned int
+#endif
+
+typedef __WINT_TYPE__ wint_t;
+
+#endif	/* _WINT_T */
+
+#define WEOF		((wint_t)(-1))
+
+typedef int wctype_t;
+
+
+#endif /* __WINT_T_H */

headers/posix/stdint.h

@@ -138,6 +138,8 @@ typedef uint64_t uintmax_t;
 #define WINT_MIN 	0
 #define WINT_MAX 	((wint_t)-1)
 
+#define WCHAR_MIN      0x00000000UL
+#define WCHAR_MAX      0x7FFFFFFFUL
 
 /* Macros of Integer Constant Expressions */
 #define INT8_C(value) 	value

headers/posix/uchar.h

@@ -7,7 +7,14 @@
 
 
 #include <stdint.h>
-#include <wchar.h>
+#include <wchar_t.h>
+#include <_mbstate_t.h>
+
+
+#if !defined(__cplusplus) || __cplusplus < 201103L
+typedef uint_least32_t char32_t;
+typedef uint_least16_t char16_t;
+#endif
 
 
 #ifdef __cplusplus
@@ -15,10 +22,6 @@ extern "C" {
 #endif
 
 
-typedef uint_least32_t char32_t;
-typedef uint_least16_t char16_t;
-
-
 #define __STD_UTF_32__ 1
 #define __STD_UTF_16__ 1
 
@@ -26,26 +29,9 @@ typedef uint_least16_t char16_t;
 // TODO implement mbrtoc16
 
 
-static __inline size_t
-c16rtomb(char *dest, char32_t wc, mbstate_t *mbState)
-{
-	wchar_t tmp = (wchar_t)wc;
-	return wcrtomb(dest, tmp, mbState);
-}
-
-
-static __inline size_t
-mbrtoc32(char32_t *dest, const char *src, size_t srcLength, mbstate_t *mbState)
-{
-	return mbrtowc((wchar_t*)dest, src, srcLength, mbState);
-}
-
-
-static __inline size_t
-c32rtomb(char *dest, char32_t wc, mbstate_t *mbState)
-{
-	return wcrtomb(dest, (wchar_t)wc, mbState);
-}
+size_t c16rtomb(char *dest, char32_t wc, mbstate_t *mbState);
+size_t mbrtoc32(char32_t *dest, const char *src, size_t srcLength, mbstate_t *mbState);
+size_t c32rtomb(char *dest, char32_t wc, mbstate_t *mbState);
 
 
 #ifdef __cplusplus

headers/posix/wchar.h

@@ -12,34 +12,14 @@
 #include <stdio.h>
 #include <time.h>
 
-
-/* stddef.h is not supposed to define wint_t, but gcc 2.95.3's one does.
- * In all other cases we will do that. */
-#ifndef _WINT_T
-#define _WINT_T
-
-#ifndef __WINT_TYPE__
-#define __WINT_TYPE__ unsigned int
-#endif
-
-typedef __WINT_TYPE__ wint_t;
-
-#endif	/* _WINT_T */
-
-typedef int wctype_t;
-
-typedef struct {
-	void* converter;
-	char charset[64];
-	unsigned int count;
-	char data[1024 + 8];	/* 1024 bytes for data, 8 for alignment space */
-} mbstate_t;
+#include <_mbstate_t.h>
+#include <_wint_t.h>
 
 
-#define WEOF		((wint_t)(-1))
-
+#ifndef WCHAR_MIN
 #define WCHAR_MIN	0x00000000UL
 #define WCHAR_MAX	0x7FFFFFFFUL
+#endif
 
 /*
  * Haiku is always using UTF32 in wchars, other encodings can be handled

headers/posix/wctype.h

@@ -7,7 +7,7 @@
 
 
 #include <locale_t.h>
-#include <wchar.h>
+#include <_wint_t.h>
 
 typedef int wctrans_t;
 

headers/private/libroot/locale/LocaleBackend.h

@@ -10,6 +10,7 @@
 
 #include <locale.h>
 #include <time.h>
+#include <wchar.h>
 #include <wctype.h>