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glibc/include/stdio.h
Zack Weinberg 63fb8f9aa9 Post-cleanup 2: minimize _G_config.h. 
Nearly everything in _G_config.h is either junk or more appropriately
defined elsewhere:

 * _G_fpos_t, _G_fpos64_t, and _G_BUFSIZ are already completely unused.
 * All remaining uses of _G_va_list have been changed to __gnuc_va_list.
 * The definition of _G_HAVE_ST_BLKSIZE/_IO_HAVE_ST_BLKSIZE has
   been inlined into its sole use.
 * The complete definition of _G_iconv_t has been moved to libio.h and
   renamed _IO_iconv_t (all actual users used that name).
 * _G_IO_IO_FILE_VERSION is vestigial; some code cares whether
   _IO_stdin_used exists, but nothing looks at its value.  I've
   preserved the value as a hardwired constant in csu/init.c.
   This means csu/init.c no longer needs to include anything.
 * Many of the headers included by _G_config.h were already being
   included directly by either either libio.h or stdio.h; the
   remaining ones were moved to libio.h.
 * _G_HAVE_MREMAP is still relevant, because mremap genuinely is a
   Linux extension; it's not in POSIX and as far as I can tell it's
   not available on the Hurd either.  I also preserved _G_HAVE_MMAP,
   since it's conceivable someone would want to port glibc to a
   MMU-less, mmap-less environment in the future.  Both are now always
   defined to 1/0 as is the current convention, instead of the older
   1/undef convention.  These are the only symbols still defined in
   _G_config.h.
 * The actual inclusion of _G_config.h moves from libio.h to libioP.h,
   as this is where a potential override of _G_HAVE_MMAP happens.
 * The #ifdef logic in libioP.h controlling _IO_JUMPS_OFFSET has been
   simplified.

After this patch, the only surviving _G_ symbols are the struct tag
names _G_fpos_t and _G_fpos64_t, which are preserved for the sake of
C++ mangled names in applications, and _G_HAVE_MMAP and _G_HAVE_MREMAP,
which do not seem worth renaming.

Installed stripped libraries are unchanged by this patch.

	* bits/_G_config.h: Move back to sysdeps/generic/_G_config.h.
	Delete all contents except for definitions of _G_HAVE_MMAP and
	_G_HAVE_MREMAP.  Add commentary explaining those two symbols.
	* sysdeps/unix/sysv/linux/bits/_G_config.h: Move back to
	sysdeps/unix/sysv/linux/_G_config.h.  Make same content
	change as above.

	* libio/libio.h: Don't include bits/_G_config.h here.
	Include stddef.h with __need_wchar_t defined.  Include
	bits/types/__mbstate_t.h, bits/types/wint_t.h, and gconv.h.
	Define _IO_iconv_t here, directly.
	Don't define _IO_HAVE_ST_BLKSIZE.
	* libio/libioP.h: Include _G_config.h here.  Move include of
	shlib-compat.h up with rest of includes.  Simplify conditionals
	controlling definition of _IO_JUMPS_OFFSET.

	* csu/init.c: Remove always-true #if around entire file.
	Don't include stdio.h.  Set _IO_stdin_used to hardwired
	constant 0x20001, and update commentary.
	* include/stdio.h, sysdeps/ieee754/ldbl-opt/nldbl-compat.h:
	Replace all uses of _G_va_list with __gnuc_va_list.
	* libio/filedoalloc.c: Use #if defined _STATBUF_ST_BLKSIZE
	instead of #if _IO_HAVE_ST_BLKSIZE.
	* libio/fileops.c: Test _G_HAVE_MREMAP with #if, not #ifdef.
	* libio/iofdopen.c, libio/iofopen.c: Test _G_HAVE_MMAP with #if,
	not #ifdef.
2018-02-07 10:10:32 -05:00

204 lines
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#ifndef _STDIO_H
# if !defined _ISOMAC && defined _IO_MTSAFE_IO
# include <stdio-lock.h>
# endif
# include <libio/stdio.h>
# ifndef _ISOMAC
# define _LIBC_STDIO_H 1
# include <libio/libio.h>
/* Now define the internal interfaces. */
extern int __fcloseall (void) attribute_hidden;
extern int __snprintf (char *__restrict __s, size_t __maxlen,
const char *__restrict __format, ...)
__attribute__ ((__format__ (__printf__, 3, 4)));
libc_hidden_proto (__snprintf)
extern int __vsnprintf (char *__restrict __s, size_t __maxlen,
const char *__restrict __format, __gnuc_va_list __arg)
__attribute__ ((__format__ (__printf__, 3, 0)));
extern int __vfscanf (FILE *__restrict __s,
const char *__restrict __format,
__gnuc_va_list __arg)
__attribute__ ((__format__ (__scanf__, 2, 0)));
libc_hidden_proto (__vfscanf)
extern int __vscanf (const char *__restrict __format,
__gnuc_va_list __arg)
__attribute__ ((__format__ (__scanf__, 1, 0)));
extern _IO_ssize_t __getline (char **__lineptr, size_t *__n,
FILE *__stream) attribute_hidden;
extern int __vsscanf (const char *__restrict __s,
const char *__restrict __format,
__gnuc_va_list __arg)
__attribute__ ((__format__ (__scanf__, 2, 0)));
extern int __sprintf_chk (char *, int, size_t, const char *, ...) __THROW;
extern int __snprintf_chk (char *, size_t, int, size_t, const char *, ...)
__THROW;
extern int __vsprintf_chk (char *, int, size_t, const char *,
__gnuc_va_list) __THROW;
extern int __vsnprintf_chk (char *, size_t, int, size_t, const char *,
__gnuc_va_list) __THROW;
extern int __printf_chk (int, const char *, ...);
extern int __fprintf_chk (FILE *, int, const char *, ...);
extern int __vprintf_chk (int, const char *, __gnuc_va_list);
extern int __vfprintf_chk (FILE *, int, const char *, __gnuc_va_list);
extern char *__fgets_unlocked_chk (char *buf, size_t size, int n, FILE *fp);
extern char *__fgets_chk (char *buf, size_t size, int n, FILE *fp);
extern int __asprintf_chk (char **, int, const char *, ...) __THROW;
extern int __vasprintf_chk (char **, int, const char *, __gnuc_va_list) __THROW;
extern int __dprintf_chk (int, int, const char *, ...);
extern int __vdprintf_chk (int, int, const char *, __gnuc_va_list);
extern int __obstack_printf_chk (struct obstack *, int, const char *, ...)
__THROW;
extern int __obstack_vprintf_chk (struct obstack *, int, const char *,
__gnuc_va_list) __THROW;
extern int __isoc99_fscanf (FILE *__restrict __stream,
const char *__restrict __format, ...) __wur;
extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
extern int __isoc99_sscanf (const char *__restrict __s,
const char *__restrict __format, ...) __THROW;
extern int __isoc99_vfscanf (FILE *__restrict __s,
const char *__restrict __format,
__gnuc_va_list __arg) __wur;
extern int __isoc99_vscanf (const char *__restrict __format,
__gnuc_va_list __arg) __wur;
extern int __isoc99_vsscanf (const char *__restrict __s,
const char *__restrict __format,
__gnuc_va_list __arg) __THROW;
libc_hidden_proto (__isoc99_vsscanf)
libc_hidden_proto (__isoc99_vfscanf)
/* Prototypes for compatibility functions. */
extern FILE *__new_tmpfile (void);
extern FILE *__old_tmpfile (void);
# define __need_size_t
# include <stddef.h>
# include <bits/types/wint_t.h>
/* Generate a unique file name (and possibly open it). */
extern int __path_search (char *__tmpl, size_t __tmpl_len,
const char *__dir, const char *__pfx,
int __try_tempdir) attribute_hidden;
extern int __gen_tempname (char *__tmpl, int __suffixlen, int __flags,
int __kind) attribute_hidden;
/* The __kind argument to __gen_tempname may be one of: */
# define __GT_FILE 0 /* create a file */
# define __GT_DIR 1 /* create a directory */
# define __GT_NOCREATE 2 /* just find a name not currently in use */
enum __libc_message_action
{
do_message = 0, /* Print message. */
do_abort = 1 << 0, /* Abort. */
do_backtrace = 1 << 1 /* Backtrace. */
};
/* Print out MESSAGE on the error output and abort. */
extern void __libc_fatal (const char *__message)
__attribute__ ((__noreturn__));
extern void __libc_message (enum __libc_message_action action,
const char *__fnt, ...) attribute_hidden;
extern void __fortify_fail (const char *msg) __attribute__ ((__noreturn__));
extern void __fortify_fail_abort (_Bool, const char *msg)
__attribute__ ((__noreturn__)) attribute_hidden;
libc_hidden_proto (__fortify_fail)
libc_hidden_proto (__fortify_fail_abort)
/* Acquire ownership of STREAM. */
extern void __flockfile (FILE *__stream) attribute_hidden;
/* Relinquish the ownership granted for STREAM. */
extern void __funlockfile (FILE *__stream) attribute_hidden;
/* Try to acquire ownership of STREAM but do not block if it is not
possible. */
extern int __ftrylockfile (FILE *__stream);
extern int __getc_unlocked (FILE *__fp);
extern wint_t __getwc_unlocked (FILE *__fp);
extern int __fxprintf (FILE *__fp, const char *__fmt, ...)
__attribute__ ((__format__ (__printf__, 2, 3))) attribute_hidden;
extern int __fxprintf_nocancel (FILE *__fp, const char *__fmt, ...)
__attribute__ ((__format__ (__printf__, 2, 3))) attribute_hidden;
extern const char *const _sys_errlist_internal[] attribute_hidden;
extern int _sys_nerr_internal attribute_hidden;
libc_hidden_proto (__asprintf)
# if IS_IN (libc)
extern _IO_FILE *_IO_new_fopen (const char*, const char*);
# define fopen(fname, mode) _IO_new_fopen (fname, mode)
extern _IO_FILE *_IO_new_fdopen (int, const char*);
# define fdopen(fd, mode) _IO_new_fdopen (fd, mode)
extern int _IO_new_fclose (_IO_FILE*);
# define fclose(fp) _IO_new_fclose (fp)
extern int _IO_fputs (const char*, _IO_FILE*);
libc_hidden_proto (_IO_fputs)
# define fputs(str, fp) _IO_fputs (str, fp)
extern int _IO_new_fsetpos (_IO_FILE *, const _IO_fpos_t *);
# define fsetpos(fp, posp) _IO_new_fsetpos (fp, posp)
extern int _IO_new_fgetpos (_IO_FILE *, _IO_fpos_t *);
# define fgetpos(fp, posp) _IO_new_fgetpos (fp, posp)
# endif
libc_hidden_proto (dprintf)
extern __typeof (dprintf) __dprintf
__attribute__ ((__format__ (__printf__, 2, 3)));
libc_hidden_proto (__dprintf)
libc_hidden_proto (fprintf)
libc_hidden_proto (vfprintf)
libc_hidden_proto (sprintf)
libc_hidden_proto (sscanf)
libc_hidden_proto (fwrite)
libc_hidden_proto (perror)
libc_hidden_proto (remove)
libc_hidden_proto (rewind)
libc_hidden_proto (fileno)
extern __typeof (fileno) __fileno;
libc_hidden_proto (__fileno)
libc_hidden_proto (fwrite)
libc_hidden_proto (fseek)
extern __typeof (ftello) __ftello;
libc_hidden_proto (__ftello)
libc_hidden_proto (fflush)
libc_hidden_proto (fflush_unlocked)
extern __typeof (fflush_unlocked) __fflush_unlocked;
libc_hidden_proto (__fflush_unlocked)
extern __typeof (fread_unlocked) __fread_unlocked;
libc_hidden_proto (__fread_unlocked)
libc_hidden_proto (fwrite_unlocked)
libc_hidden_proto (fgets_unlocked)
extern __typeof (fgets_unlocked) __fgets_unlocked;
libc_hidden_proto (__fgets_unlocked)
libc_hidden_proto (fputs_unlocked)
extern __typeof (fputs_unlocked) __fputs_unlocked;
libc_hidden_proto (__fputs_unlocked)
libc_hidden_proto (fmemopen)
/* The prototype needs repeating instead of using __typeof to use
__THROW in C++ tests. */
extern FILE *__open_memstream (char **, size_t *) __THROW __wur;
libc_hidden_proto (__open_memstream)
libc_hidden_proto (__libc_fatal)
rtld_hidden_proto (__libc_fatal)
libc_hidden_proto (__vsprintf_chk)
libc_hidden_proto (__vsnprintf_chk)
libc_hidden_proto (__vfprintf_chk)
libc_hidden_proto (__vasprintf_chk)
libc_hidden_proto (__vdprintf_chk)
libc_hidden_proto (__obstack_vprintf_chk)
extern FILE * __fmemopen (void *buf, size_t len, const char *mode);
libc_hidden_proto (__fmemopen)
extern int __gen_tempfd (int flags);
libc_hidden_proto (__gen_tempfd)
# endif /* not _ISOMAC */
#endif /* stdio.h */
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