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ICU-347 do not use wchar.h except when we really need it and we know that we have it

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X-SVN-Rev: 1086
This commit is contained in:
Markus Scherer 2000-04-06 22:59:56 +00:00
parent 20dd1961d9
commit 84aa10b17f
1 changed files with 8 additions and 19 deletions
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27
icu4c/source/common/unicode/utf.h
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@ -27,13 +27,9 @@
* ANSI C headers:
* stddef.h defines wchar_t
* limits.h defines CHAR_MAX
*
* Typical, though not ANSI, headers:
* wchar.h defines WCHAR_MAX
*/
#include <stddef.h>
#include <limits.h>
#include <wchar.h>
#include "unicode/umachine.h"
/* include the utfXX.h after the following definitions */
@ -44,21 +40,14 @@
#define U_SIZEOF_UCHAR (UTF_SIZE>>3)
/* U_SIZEOF_WCHAR_T==sizeof(wchar_t) */
#ifndef U_SIZEOF_WCHAR_T
# ifdef WCHAR_MAX
# if WCHAR_MAX<=255
# define U_SIZEOF_WCHAR_T 1
# elif WCHAR_MAX==65535
# define U_SIZEOF_WCHAR_T 2
# elif WCHAR_MAX>=0x10ffff
# define U_SIZEOF_WCHAR_T 4
# else
# error unexpected value of WCHAR_MAX
# endif
# else
# define U_SIZEOF_WCHAR_T 4
# endif
/* Do we have wchar.h on this platform? It is there on most platforms. */
#ifndef U_HAVE_WCHAR_H
# define U_HAVE_WCHAR_H 1
#endif
/* U_SIZEOF_WCHAR_T==sizeof(wchar_t) (0 means it is not defined or autoconf could not set it) */
#if U_SIZEOF_WCHAR_T==0
# define U_SIZEOF_WCHAR_T 4
#endif
/* Define UChar32 to be compatible with wchar_t if possible. */