musl/include/wchar.h

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#ifndef _WCHAR_H
#define _WCHAR_H
#ifdef __cplusplus
extern "C" {
#endif
#include <features.h>
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#define __NEED_FILE
#define __NEED___isoc_va_list
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#define __NEED_size_t
#define __NEED_wchar_t
#define __NEED_wint_t
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#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define __NEED_locale_t
#define __NEED_va_list
#endif
#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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#define __NEED_wctype_t
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#endif
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#include <bits/alltypes.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
#ifdef __cplusplus
use a common definition of NULL as 0L for C and C++ the historical mess of having different definitions for C and C++ comes from the historical C definition as (void *)0 and the fact that (void *)0 can't be used in C++ because it does not convert to other pointer types implicitly. however, using plain 0 in C++ exposed bugs in C++ programs that call variadic functions with NULL as an argument and (wrongly; this is UB) expect it to arrive as a null pointer. on 64-bit machines, the high bits end up containing junk. glibc dodges the issue by using a GCC extension __null to define NULL; this is observably non-conforming because a conforming application could observe the definition of NULL via stringizing and see that it is neither an integer constant expression with value zero nor such an expression cast to void. switching to 0L eliminates the issue and provides compatibility with broken applications, since on all musl targets, long and pointers have the same size, representation, and argument-passing convention. we could maintain separate C and C++ definitions of NULL (i.e. just use 0L on C++ and use (void *)0 on C) but after careful analysis, it seems extremely difficult for a C program to even determine whether NULL has integer or pointer type, much less depend in subtle, unintentional ways, on whether it does. C89 seems to have no way to make the distinction. on C99, the fact that (int)(void *)0 is not an integer constant expression, along with subtle VLA/sizeof semantics, can be used to make the distinction, but many compilers are non-conforming and give the wrong result to this test anyway. on C11, _Generic can trivially make the distinction, but it seems unlikely that code targetting C11 would be so backwards in caring which definition of NULL an implementation uses. as such, the simplest path of using the same definition for NULL in both C and C++ was chosen. the #undef directive was also removed so that the compiler can catch and give a warning or error on redefinition if buggy programs have defined their own versions of NULL prior to inclusion of standard headers.
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#define NULL 0L
#else
#define NULL ((void*)0)
#endif
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#undef WEOF
#define WEOF 0xffffffffU
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refactor headers, especially alltypes.h, and improve C++ ABI compat the arch-specific bits/alltypes.h.sh has been replaced with a generic alltypes.h.in and minimal arch-specific bits/alltypes.h.in. this commit is intended to have no functional changes except: - exposing additional symbols that POSIX allows but does not require - changing the C++ name mangling for some types - fixing the signedness of blksize_t on powerpc (POSIX requires signed) - fixing the limit macros for sig_atomic_t on x86_64 - making dev_t an unsigned type (ABI matching goal, and more logical) in addition, some types that were wrongly defined with long on 32-bit archs were changed to int, and vice versa; this change is non-functional except for the possibility of making pointer types mismatch, and only affects programs that were using them incorrectly, and only at build-time, not runtime. the following changes were made in the interest of moving non-arch-specific types out of the alltypes system and into the headers they're associated with, and also will tend to improve application compatibility: - netdb.h now includes netinet/in.h (for socklen_t and uint32_t) - netinet/in.h now includes sys/socket.h and inttypes.h - sys/resource.h now includes sys/time.h (for struct timeval) - sys/wait.h now includes signal.h (for siginfo_t) - langinfo.h now includes nl_types.h (for nl_item) for the types in stdint.h: - types which are of no interest to other headers were moved out of the alltypes system. - fast types for 8- and 64-bit are hard-coded (at least for now); only the 16- and 32-bit ones have reason to vary by arch. and the following types have been changed for C++ ABI purposes; - mbstate_t now has a struct tag, __mbstate_t - FILE's struct tag has been changed to _IO_FILE - DIR's struct tag has been changed to __dirstream - locale_t's struct tag has been changed to __locale_struct - pthread_t is defined as unsigned long in C++ mode only - fpos_t now has a struct tag, _G_fpos64_t - fsid_t's struct tag has been changed to __fsid_t - idtype_t has been made an enum type (also required by POSIX) - nl_catd has been changed from long to void * - siginfo_t's struct tag has been removed - sigset_t's has been given a struct tag, __sigset_t - stack_t has been given a struct tag, sigaltstack - suseconds_t has been changed to long on 32-bit archs - [u]intptr_t have been changed from long to int rank on 32-bit archs - dev_t has been made unsigned summary of tests that have been performed against these changes: - nsz's libc-test (diff -u before and after) - C++ ABI check symbol dump (diff -u before, after, glibc) - grepped for __NEED, made sure types needed are still in alltypes - built gcc 3.4.6
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typedef struct __mbstate_t
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{
unsigned __opaque1, __opaque2;
} mbstate_t;
wchar_t *wcscpy (wchar_t *__restrict, const wchar_t *__restrict);
wchar_t *wcsncpy (wchar_t *__restrict, const wchar_t *__restrict, size_t);
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wchar_t *wcscat (wchar_t *__restrict, const wchar_t *__restrict);
wchar_t *wcsncat (wchar_t *__restrict, const wchar_t *__restrict, size_t);
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int wcscmp (const wchar_t *, const wchar_t *);
int wcsncmp (const wchar_t *, const wchar_t *, size_t);
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int wcscoll(const wchar_t *, const wchar_t *);
size_t wcsxfrm (wchar_t *__restrict, const wchar_t *__restrict, size_t n);
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wchar_t *wcschr (const wchar_t *, wchar_t);
wchar_t *wcsrchr (const wchar_t *, wchar_t);
size_t wcscspn (const wchar_t *, const wchar_t *);
size_t wcsspn (const wchar_t *, const wchar_t *);
wchar_t *wcspbrk (const wchar_t *, const wchar_t *);
wchar_t *wcstok (wchar_t *__restrict, const wchar_t *__restrict, wchar_t **__restrict);
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size_t wcslen (const wchar_t *);
wchar_t *wcsstr (const wchar_t *__restrict, const wchar_t *__restrict);
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wchar_t *wcswcs (const wchar_t *, const wchar_t *);
wchar_t *wmemchr (const wchar_t *, wchar_t, size_t);
int wmemcmp (const wchar_t *, const wchar_t *, size_t);
wchar_t *wmemcpy (wchar_t *__restrict, const wchar_t *__restrict, size_t);
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wchar_t *wmemmove (wchar_t *, const wchar_t *, size_t);
wchar_t *wmemset (wchar_t *, wchar_t, size_t);
wint_t btowc (int);
int wctob (wint_t);
int mbsinit (const mbstate_t *);
size_t mbrtowc (wchar_t *__restrict, const char *__restrict, size_t, mbstate_t *__restrict);
size_t wcrtomb (char *__restrict, wchar_t, mbstate_t *__restrict);
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size_t mbrlen (const char *__restrict, size_t, mbstate_t *__restrict);
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size_t mbsrtowcs (wchar_t *__restrict, const char **__restrict, size_t, mbstate_t *__restrict);
size_t wcsrtombs (char *__restrict, const wchar_t **__restrict, size_t, mbstate_t *__restrict);
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float wcstof (const wchar_t *__restrict, wchar_t **__restrict);
double wcstod (const wchar_t *__restrict, wchar_t **__restrict);
long double wcstold (const wchar_t *__restrict, wchar_t **__restrict);
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long wcstol (const wchar_t *__restrict, wchar_t **__restrict, int);
unsigned long wcstoul (const wchar_t *__restrict, wchar_t **__restrict, int);
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long long wcstoll (const wchar_t *__restrict, wchar_t **__restrict, int);
unsigned long long wcstoull (const wchar_t *__restrict, wchar_t **__restrict, int);
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int fwide (FILE *, int);
int wprintf (const wchar_t *__restrict, ...);
int fwprintf (FILE *__restrict, const wchar_t *__restrict, ...);
int swprintf (wchar_t *__restrict, size_t, const wchar_t *__restrict, ...);
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int vwprintf (const wchar_t *__restrict, __isoc_va_list);
int vfwprintf (FILE *__restrict, const wchar_t *__restrict, __isoc_va_list);
int vswprintf (wchar_t *__restrict, size_t, const wchar_t *__restrict, __isoc_va_list);
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int wscanf (const wchar_t *__restrict, ...);
int fwscanf (FILE *__restrict, const wchar_t *__restrict, ...);
int swscanf (const wchar_t *__restrict, const wchar_t *__restrict, ...);
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int vwscanf (const wchar_t *__restrict, __isoc_va_list);
int vfwscanf (FILE *__restrict, const wchar_t *__restrict, __isoc_va_list);
int vswscanf (const wchar_t *__restrict, const wchar_t *__restrict, __isoc_va_list);
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wint_t fgetwc (FILE *);
wint_t getwc (FILE *);
wint_t getwchar (void);
wint_t fputwc (wchar_t, FILE *);
wint_t putwc (wchar_t, FILE *);
wint_t putwchar (wchar_t);
wchar_t *fgetws (wchar_t *__restrict, int, FILE *__restrict);
int fputws (const wchar_t *__restrict, FILE *__restrict);
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wint_t ungetwc (wint_t, FILE *);
struct tm;
size_t wcsftime (wchar_t *__restrict, size_t, const wchar_t *__restrict, const struct tm *__restrict);
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#undef iswdigit
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
FILE *open_wmemstream(wchar_t **, size_t *);
size_t mbsnrtowcs(wchar_t *__restrict, const char **__restrict, size_t, size_t, mbstate_t *__restrict);
size_t wcsnrtombs(char *__restrict, const wchar_t **__restrict, size_t, size_t, mbstate_t *__restrict);
wchar_t *wcsdup(const wchar_t *);
size_t wcsnlen (const wchar_t *, size_t);
wchar_t *wcpcpy (wchar_t *__restrict, const wchar_t *__restrict);
wchar_t *wcpncpy (wchar_t *__restrict, const wchar_t *__restrict, size_t);
int wcscasecmp(const wchar_t *, const wchar_t *);
int wcscasecmp_l(const wchar_t *, const wchar_t *, locale_t);
int wcsncasecmp(const wchar_t *, const wchar_t *, size_t);
int wcsncasecmp_l(const wchar_t *, const wchar_t *, size_t, locale_t);
int wcscoll_l(const wchar_t *, const wchar_t *, locale_t);
size_t wcsxfrm_l(wchar_t *__restrict, const wchar_t *__restrict, size_t n, locale_t);
#endif
#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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int wcwidth (wchar_t);
int wcswidth (const wchar_t *, size_t);
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int iswalnum(wint_t);
int iswalpha(wint_t);
int iswblank(wint_t);
int iswcntrl(wint_t);
int iswdigit(wint_t);
int iswgraph(wint_t);
int iswlower(wint_t);
int iswprint(wint_t);
int iswpunct(wint_t);
int iswspace(wint_t);
int iswupper(wint_t);
int iswxdigit(wint_t);
int iswctype(wint_t, wctype_t);
wint_t towlower(wint_t);
wint_t towupper(wint_t);
wctype_t wctype(const char *);
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#undef iswdigit
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#define iswdigit(a) ((unsigned)(a)-'0' < 10)
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#endif
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#ifdef __cplusplus
}
#endif
#endif