Mechanically remove _IO_ name aliases for types and constants.

This patch mechanically removes all remaining uses, and the
definitions, of the following libio name aliases:

 name                         replaced with
 ----                         -------------
 _IO_FILE                     FILE
 _IO_fpos_t                   __fpos_t
 _IO_fpos64_t                 __fpos64_t
 _IO_size_t                   size_t
 _IO_ssize_t                  ssize_t or __ssize_t
 _IO_off_t                    off_t
 _IO_off64_t                  off64_t
 _IO_pid_t                    pid_t
 _IO_uid_t                    uid_t
 _IO_wint_t                   wint_t
 _IO_va_list                  va_list or __gnuc_va_list
 _IO_BUFSIZ                   BUFSIZ
 _IO_cookie_io_functions_t    cookie_io_functions_t
 __io_read_fn                 cookie_read_function_t
 __io_write_fn                cookie_write_function_t
 __io_seek_fn                 cookie_seek_function_t
 __io_close_fn                cookie_close_function_t

I used __fpos_t and __fpos64_t instead of fpos_t and fpos64_t because
the definitions of fpos_t and fpos64_t depend on the largefile mode.
I used __ssize_t and __gnuc_va_list in a handful of headers where
namespace cleanliness might be relevant even though they're
internal-use-only.  In all other cases, I used the public-namespace
name.

There are a tiny handful of places where I left a use of 'struct _IO_FILE'
alone, because it was being used together with 'struct _IO_FILE_plus'
or 'struct _IO_FILE_complete' in the same arithmetic expression.

Because this patch was almost entirely done with search and replace, I
may have introduced indentation botches.  I did proofread the diff,
but I may have missed something.

The ChangeLog below calls out all of the places where this was not a
pure search-and-replace change.

Installed stripped libraries and executables are unchanged by this patch,
except that some assertions in vfscanf.c change line numbers.

	* libio/libio.h (_IO_FILE): Delete; all uses changed to FILE.
	(_IO_fpos_t): Delete; all uses changed to __fpos_t.
	(_IO_fpos64_t): Delete; all uses changed to __fpos64_t.
	(_IO_size_t): Delete; all uses changed to size_t.
	(_IO_ssize_t): Delete; all uses changed to ssize_t or __ssize_t.
	(_IO_off_t): Delete; all uses changed to off_t.
	(_IO_off64_t): Delete; all uses changed to off64_t.
	(_IO_pid_t): Delete; all uses changed to pid_t.
	(_IO_uid_t): Delete; all uses changed to uid_t.
	(_IO_wint_t): Delete; all uses changed to wint_t.
	(_IO_va_list): Delete; all uses changed to va_list or __gnuc_va_list.
	(_IO_BUFSIZ): Delete; all uses changed to BUFSIZ.
	(_IO_cookie_io_functions_t): Delete; all uses changed to
	cookie_io_functions_t.
	(__io_read_fn): Delete; all uses changed to cookie_read_function_t.
	(__io_write_fn): Delete; all uses changed to cookie_write_function_t.
	(__io_seek_fn): Delete; all uses changed to cookie_seek_function_t.
	(__io_close_fn): Delete: all uses changed to cookie_close_function_t.

	* libio/iofopncook.c: Remove unnecessary forward declarations.
	* libio/iolibio.h: Correct outdated commentary.
	* malloc/malloc.c (__malloc_stats): Remove unnecessary casts.
	* stdio-common/fxprintf.c (__fxprintf_nocancel):
	Remove unnecessary casts.
	* stdio-common/getline.c: Use _IO_getdelim directly.
	Don't redefine ssize_t.
	* stdio-common/printf_fp.c, stdio_common/printf_fphex.c
	* stdio-common/printf_size.c: Don't redefine size_t or FILE.
	Remove outdated comments.
	* stdio-common/vfscanf.c: Don't redefine va_list.

8 files changed, 15 insertions, 15 deletions

diff --git a/debug/fgets_chk.c b/debug/fgets_chk.c
index 024c5cc0ee..f223653370 100644
--- a/debug/fgets_chk.c
+++ b/debug/fgets_chk.c
@@ -29,9 +29,9 @@
 #include <sys/param.h>
 
 char *
-__fgets_chk (char *buf, size_t size, int n, _IO_FILE *fp)
+__fgets_chk (char *buf, size_t size, int n, FILE *fp)
 {
-  _IO_size_t count;
+  size_t count;
   char *result;
   CHECK_FILE (fp, NULL);
   if (n <= 0)
diff --git a/debug/fgets_u_chk.c b/debug/fgets_u_chk.c
index 668fdc81d4..317ae5649d 100644
--- a/debug/fgets_u_chk.c
+++ b/debug/fgets_u_chk.c
@@ -29,9 +29,9 @@
 #include <sys/param.h>
 
 char *
-__fgets_unlocked_chk (char *buf, size_t size, int n, _IO_FILE *fp)
+__fgets_unlocked_chk (char *buf, size_t size, int n, FILE *fp)
 {
-  _IO_size_t count;
+  size_t count;
   char *result;
   CHECK_FILE (fp, NULL);
   if (n <= 0)
diff --git a/debug/fgetws_chk.c b/debug/fgetws_chk.c
index 4693a0ba1b..8ea6635b30 100644
--- a/debug/fgetws_chk.c
+++ b/debug/fgetws_chk.c
@@ -20,9 +20,9 @@
 #include <sys/param.h>
 
 wchar_t *
-__fgetws_chk (wchar_t *buf, size_t size, int n, _IO_FILE *fp)
+__fgetws_chk (wchar_t *buf, size_t size, int n, FILE *fp)
 {
-  _IO_size_t count;
+  size_t count;
   wchar_t *result;
   int old_error;
   CHECK_FILE (fp, NULL);
diff --git a/debug/fgetws_u_chk.c b/debug/fgetws_u_chk.c
index 36627d79be..42dad6bc8b 100644
--- a/debug/fgetws_u_chk.c
+++ b/debug/fgetws_u_chk.c
@@ -29,9 +29,9 @@
 #include <sys/param.h>
 
 wchar_t *
-__fgetws_unlocked_chk (wchar_t *buf, size_t size, int n, _IO_FILE *fp)
+__fgetws_unlocked_chk (wchar_t *buf, size_t size, int n, FILE *fp)
 {
-  _IO_size_t count;
+  size_t count;
   wchar_t *result;
   int old_error;
   CHECK_FILE (fp, NULL);
diff --git a/debug/gets_chk.c b/debug/gets_chk.c
index 6c10d68f34..df3f947e70 100644
--- a/debug/gets_chk.c
+++ b/debug/gets_chk.c
@@ -30,7 +30,7 @@
 char *
 __gets_chk (char *buf, size_t size)
 {
-  _IO_size_t count;
+  size_t count;
   int ch;
   char *retval;
 
diff --git a/debug/vasprintf_chk.c b/debug/vasprintf_chk.c
index a00ef771e6..46603d9538 100644
--- a/debug/vasprintf_chk.c
+++ b/debug/vasprintf_chk.c
@@ -37,12 +37,12 @@ __vasprintf_chk (char **result_ptr, int flags, const char *format,
 {
   /* Initial size of the buffer to be used.  Will be doubled each time an
      overflow occurs.  */
-  const _IO_size_t init_string_size = 100;
+  const size_t init_string_size = 100;
   char *string;
   _IO_strfile sf;
   int ret;
-  _IO_size_t needed;
-  _IO_size_t allocated;
+  size_t needed;
+  size_t allocated;
   /* No need to clear the memory here (unlike for open_memstream) since
      we know we will never seek on the stream.  */
   string = (char *) malloc (init_string_size);
diff --git a/debug/vsprintf_chk.c b/debug/vsprintf_chk.c
index aa9571d475..9a443bb699 100644
--- a/debug/vsprintf_chk.c
+++ b/debug/vsprintf_chk.c
@@ -21,10 +21,10 @@
 #include "../libio/strfile.h"
 
 
-static int _IO_str_chk_overflow (_IO_FILE *fp, int c) __THROW;
+static int _IO_str_chk_overflow (FILE *fp, int c) __THROW;
 
 static int
-_IO_str_chk_overflow (_IO_FILE *fp, int c)
+_IO_str_chk_overflow (FILE *fp, int c)
 {
   /* When we come to here this means the user supplied buffer is
      filled.  */
diff --git a/debug/vswprintf_chk.c b/debug/vswprintf_chk.c
index 816955707f..c6a7edcacd 100644
--- a/debug/vswprintf_chk.c
+++ b/debug/vswprintf_chk.c
@@ -59,7 +59,7 @@ __vswprintf_chk (wchar_t *s, size_t maxlen, int flags, size_t slen,
     sf.f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY;
 
   _IO_wstr_init_static (&sf.f._sbf._f, s, maxlen - 1, s);
-  ret = _IO_vfwprintf ((_IO_FILE *) &sf.f._sbf, format, args);
+  ret = _IO_vfwprintf ((FILE *) &sf.f._sbf, format, args);
 
   if (sf.f._sbf._f._wide_data->_IO_buf_base == sf.overflow_buf)
     /* ISO C99 requires swprintf/vswprintf to return an error if the