+++ /dev/null
-/* Copyright (C) 1993, 1995, 1997-1999, 2000 Free Software Foundation, Inc.
- This file is part of the GNU IO Library.
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2, or (at
- your option) any later version.
-
- This library is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this library; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA.
-
- As a special exception, if you link this library with files
- compiled with a GNU compiler to produce an executable, this does
- not cause the resulting executable to be covered by the GNU General
- Public License. This exception does not however invalidate any
- other reasons why the executable file might be covered by the GNU
- General Public License. */
-
-/* Generic or default I/O operations. */
-
-#include "libioP.h"
-#ifdef __STDC__
-#include <stdlib.h>
-#endif
-#include <string.h>
-
-#ifdef _IO_MTSAFE_IO
-static _IO_lock_t list_all_lock = _IO_lock_initializer;
-#endif
-
-void
-_IO_un_link (fp)
- struct _IO_FILE_plus *fp;
-{
- if (fp->file._flags & _IO_LINKED)
- {
- struct _IO_FILE_plus **f;
-#ifdef _IO_MTSAFE_IO
- _IO_lock_lock (list_all_lock);
-#endif
- for (f = &_IO_list_all; *f; f = (struct _IO_FILE_plus **) &(*f)->file._chain)
- {
- if (*f == fp)
- {
- *f = (struct _IO_FILE_plus *) fp->file._chain;
- break;
- }
- }
-#ifdef _IO_MTSAFE_IO
- _IO_lock_unlock (list_all_lock);
-#endif
- fp->file._flags &= ~_IO_LINKED;
- }
-}
-
-void
-_IO_link_in (fp)
- struct _IO_FILE_plus *fp;
-{
- if ((fp->file._flags & _IO_LINKED) == 0)
- {
- fp->file._flags |= _IO_LINKED;
-#ifdef _IO_MTSAFE_IO
- _IO_lock_lock (list_all_lock);
-#endif
- fp->file._chain = (_IO_FILE *) _IO_list_all;
- _IO_list_all = fp;
-#ifdef _IO_MTSAFE_IO
- _IO_lock_unlock (list_all_lock);
-#endif
- }
-}
-
-/* Return minimum _pos markers
- Assumes the current get area is the main get area. */
-_IO_ssize_t _IO_least_marker __P ((_IO_FILE *fp, char *end_p));
-
-_IO_ssize_t
-_IO_least_marker (fp, end_p)
- _IO_FILE *fp;
- char *end_p;
-{
- _IO_ssize_t least_so_far = end_p - fp->_IO_read_base;
- struct _IO_marker *mark;
- for (mark = fp->_markers; mark != NULL; mark = mark->_next)
- if (mark->_pos < least_so_far)
- least_so_far = mark->_pos;
- return least_so_far;
-}
-
-/* Switch current get area from backup buffer to (start of) main get area. */
-
-void
-_IO_switch_to_main_get_area (fp)
- _IO_FILE *fp;
-{
- char *tmp;
- fp->_flags &= ~_IO_IN_BACKUP;
- /* Swap _IO_read_end and _IO_save_end. */
- tmp = fp->_IO_read_end;
- fp->_IO_read_end = fp->_IO_save_end;
- fp->_IO_save_end= tmp;
- /* Swap _IO_read_base and _IO_save_base. */
- tmp = fp->_IO_read_base;
- fp->_IO_read_base = fp->_IO_save_base;
- fp->_IO_save_base = tmp;
- /* Set _IO_read_ptr. */
- fp->_IO_read_ptr = fp->_IO_read_base;
-}
-
-/* Switch current get area from main get area to (end of) backup area. */
-
-void
-_IO_switch_to_backup_area (fp)
- _IO_FILE *fp;
-{
- char *tmp;
- fp->_flags |= _IO_IN_BACKUP;
- /* Swap _IO_read_end and _IO_save_end. */
- tmp = fp->_IO_read_end;
- fp->_IO_read_end = fp->_IO_save_end;
- fp->_IO_save_end = tmp;
- /* Swap _IO_read_base and _IO_save_base. */
- tmp = fp->_IO_read_base;
- fp->_IO_read_base = fp->_IO_save_base;
- fp->_IO_save_base = tmp;
- /* Set _IO_read_ptr. */
- fp->_IO_read_ptr = fp->_IO_read_end;
-}
-
-int
-_IO_switch_to_get_mode (fp)
- _IO_FILE *fp;
-{
- if (fp->_IO_write_ptr > fp->_IO_write_base)
- if (_IO_OVERFLOW (fp, EOF) == EOF)
- return EOF;
- if (_IO_in_backup (fp))
- fp->_IO_read_base = fp->_IO_backup_base;
- else
- {
- fp->_IO_read_base = fp->_IO_buf_base;
- if (fp->_IO_write_ptr > fp->_IO_read_end)
- fp->_IO_read_end = fp->_IO_write_ptr;
- }
- fp->_IO_read_ptr = fp->_IO_write_ptr;
-
- fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end = fp->_IO_read_ptr;
-
- fp->_flags &= ~_IO_CURRENTLY_PUTTING;
- return 0;
-}
-
-void
-_IO_free_backup_area (fp)
- _IO_FILE *fp;
-{
- if (_IO_in_backup (fp))
- _IO_switch_to_main_get_area (fp); /* Just in case. */
- free (fp->_IO_save_base);
- fp->_IO_save_base = NULL;
- fp->_IO_save_end = NULL;
- fp->_IO_backup_base = NULL;
-}
-
-#if 0
-int
-_IO_switch_to_put_mode (fp)
- _IO_FILE *fp;
-{
- fp->_IO_write_base = fp->_IO_read_ptr;
- fp->_IO_write_ptr = fp->_IO_read_ptr;
- /* Following is wrong if line- or un-buffered? */
- fp->_IO_write_end = (fp->_flags & _IO_IN_BACKUP
- ? fp->_IO_read_end : fp->_IO_buf_end);
-
- fp->_IO_read_ptr = fp->_IO_read_end;
- fp->_IO_read_base = fp->_IO_read_end;
-
- fp->_flags |= _IO_CURRENTLY_PUTTING;
- return 0;
-}
-#endif
-
-int
-__overflow (f, ch)
- _IO_FILE *f;
- int ch;
-{
- /* This is a single-byte stream. */
- if (f->_mode == 0)
- _IO_fwide (f, -1);
- return _IO_OVERFLOW (f, ch);
-}
-
-static int save_for_backup __P ((_IO_FILE *fp, char *end_p))
-#ifdef _LIBC
- internal_function
-#endif
- ;
-
-static int
-#ifdef _LIBC
-internal_function
-#endif
-save_for_backup (fp, end_p)
- _IO_FILE *fp;
- char *end_p;
-{
- /* Append [_IO_read_base..end_p] to backup area. */
- _IO_ssize_t least_mark = _IO_least_marker (fp, end_p);
- /* needed_size is how much space we need in the backup area. */
- _IO_size_t needed_size = (end_p - fp->_IO_read_base) - least_mark;
- /* FIXME: Dubious arithmetic if pointers are NULL */
- _IO_size_t current_Bsize = fp->_IO_save_end - fp->_IO_save_base;
- _IO_size_t avail; /* Extra space available for future expansion. */
- _IO_ssize_t delta;
- struct _IO_marker *mark;
- if (needed_size > current_Bsize)
- {
- char *new_buffer;
- avail = 100;
- new_buffer = (char *) malloc (avail + needed_size);
- if (new_buffer == NULL)
- return EOF; /* FIXME */
- if (least_mark < 0)
- {
-#ifdef _LIBC
- __mempcpy (__mempcpy (new_buffer + avail,
- fp->_IO_save_end + least_mark,
- -least_mark),
- fp->_IO_read_base,
- end_p - fp->_IO_read_base);
-#else
- memcpy (new_buffer + avail,
- fp->_IO_save_end + least_mark,
- -least_mark);
- memcpy (new_buffer + avail - least_mark,
- fp->_IO_read_base,
- end_p - fp->_IO_read_base);
-#endif
- }
- else
- memcpy (new_buffer + avail,
- fp->_IO_read_base + least_mark,
- needed_size);
- if (fp->_IO_save_base)
- free (fp->_IO_save_base);
- fp->_IO_save_base = new_buffer;
- fp->_IO_save_end = new_buffer + avail + needed_size;
- }
- else
- {
- avail = current_Bsize - needed_size;
- if (least_mark < 0)
- {
- memmove (fp->_IO_save_base + avail,
- fp->_IO_save_end + least_mark,
- -least_mark);
- memcpy (fp->_IO_save_base + avail - least_mark,
- fp->_IO_read_base,
- end_p - fp->_IO_read_base);
- }
- else if (needed_size > 0)
- memcpy (fp->_IO_save_base + avail,
- fp->_IO_read_base + least_mark,
- needed_size);
- }
- fp->_IO_backup_base = fp->_IO_save_base + avail;
- /* Adjust all the streammarkers. */
- delta = end_p - fp->_IO_read_base;
- for (mark = fp->_markers; mark != NULL; mark = mark->_next)
- mark->_pos -= delta;
- return 0;
-}
-
-int
-__underflow (fp)
- _IO_FILE *fp;
-{
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
- if (fp->_vtable_offset == 0 && _IO_fwide (fp, -1) != -1)
- return EOF;
-#endif
-
- if (fp->_mode == 0)
- _IO_fwide (fp, -1);
- if (_IO_in_put_mode (fp))
- if (_IO_switch_to_get_mode (fp) == EOF)
- return EOF;
- if (fp->_IO_read_ptr < fp->_IO_read_end)
- return *(unsigned char *) fp->_IO_read_ptr;
- if (_IO_in_backup (fp))
- {
- _IO_switch_to_main_get_area (fp);
- if (fp->_IO_read_ptr < fp->_IO_read_end)
- return *(unsigned char *) fp->_IO_read_ptr;
- }
- if (_IO_have_markers (fp))
- {
- if (save_for_backup (fp, fp->_IO_read_end))
- return EOF;
- }
- else if (_IO_have_backup (fp))
- _IO_free_backup_area (fp);
- return _IO_UNDERFLOW (fp);
-}
-
-int
-__uflow (fp)
- _IO_FILE *fp;
-{
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
- if (fp->_vtable_offset == 0 && _IO_fwide (fp, -1) != -1)
- return EOF;
-#endif
-
- if (fp->_mode == 0)
- _IO_fwide (fp, -11);
- if (_IO_in_put_mode (fp))
- if (_IO_switch_to_get_mode (fp) == EOF)
- return EOF;
- if (fp->_IO_read_ptr < fp->_IO_read_end)
- return *(unsigned char *) fp->_IO_read_ptr++;
- if (_IO_in_backup (fp))
- {
- _IO_switch_to_main_get_area (fp);
- if (fp->_IO_read_ptr < fp->_IO_read_end)
- return *(unsigned char *) fp->_IO_read_ptr++;
- }
- if (_IO_have_markers (fp))
- {
- if (save_for_backup (fp, fp->_IO_read_end))
- return EOF;
- }
- else if (_IO_have_backup (fp))
- _IO_free_backup_area (fp);
- return _IO_UFLOW (fp);
-}
-
-void
-_IO_setb (f, b, eb, a)
- _IO_FILE *f;
- char *b;
- char *eb;
- int a;
-{
- if (f->_IO_buf_base && !(f->_flags & _IO_USER_BUF))
- FREE_BUF (f->_IO_buf_base, _IO_blen (f));
- f->_IO_buf_base = b;
- f->_IO_buf_end = eb;
- if (a)
- f->_flags &= ~_IO_USER_BUF;
- else
- f->_flags |= _IO_USER_BUF;
-}
-
-void
-_IO_doallocbuf (fp)
- _IO_FILE *fp;
-{
- if (fp->_IO_buf_base)
- return;
- if (!(fp->_flags & _IO_UNBUFFERED))
- if (_IO_DOALLOCATE (fp) != EOF)
- return;
- _IO_setb (fp, fp->_shortbuf, fp->_shortbuf+1, 0);
-}
-
-int
-_IO_default_underflow (fp)
- _IO_FILE *fp;
-{
- return EOF;
-}
-
-int
-_IO_default_uflow (fp)
- _IO_FILE *fp;
-{
- int ch = _IO_UNDERFLOW (fp);
- if (ch == EOF)
- return EOF;
- return *(unsigned char *) fp->_IO_read_ptr++;
-}
-
-_IO_size_t
-_IO_default_xsputn (f, data, n)
- _IO_FILE *f;
- const void *data;
- _IO_size_t n;
-{
- const char *s = (char *) data;
- _IO_size_t more = n;
- if (more <= 0)
- return 0;
- for (;;)
- {
- /* Space available. */
- _IO_ssize_t count = f->_IO_write_end - f->_IO_write_ptr;
- if (count > 0)
- {
- if ((_IO_size_t) count > more)
- count = more;
- if (count > 20)
- {
-#ifdef _LIBC
- f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count);
-#else
- memcpy (f->_IO_write_ptr, s, count);
- f->_IO_write_ptr += count;
-#endif
- s += count;
- }
- else if (count <= 0)
- count = 0;
- else
- {
- char *p = f->_IO_write_ptr;
- _IO_ssize_t i;
- for (i = count; --i >= 0; )
- *p++ = *s++;
- f->_IO_write_ptr = p;
- }
- more -= count;
- }
- if (more == 0 || _IO_OVERFLOW (f, (unsigned char) *s++) == EOF)
- break;
- more--;
- }
- return n - more;
-}
-
-_IO_size_t
-_IO_sgetn (fp, data, n)
- _IO_FILE *fp;
- void *data;
- _IO_size_t n;
-{
- /* FIXME handle putback buffer here! */
- return _IO_XSGETN (fp, data, n);
-}
-
-_IO_size_t
-_IO_default_xsgetn (fp, data, n)
- _IO_FILE *fp;
- void *data;
- _IO_size_t n;
-{
- _IO_size_t more = n;
- char *s = (char*) data;
- for (;;)
- {
- /* Data available. */
- _IO_ssize_t count = fp->_IO_read_end - fp->_IO_read_ptr;
- if (count > 0)
- {
- if ((_IO_size_t) count > more)
- count = more;
- if (count > 20)
- {
-#ifdef _LIBC
- s = __mempcpy (s, fp->_IO_read_ptr, count);
-#else
- memcpy (s, fp->_IO_read_ptr, count);
- s += count;
-#endif
- fp->_IO_read_ptr += count;
- }
- else if (count <= 0)
- count = 0;
- else
- {
- char *p = fp->_IO_read_ptr;
- int i = (int) count;
- while (--i >= 0)
- *s++ = *p++;
- fp->_IO_read_ptr = p;
- }
- more -= count;
- }
- if (more == 0 || __underflow (fp) == EOF)
- break;
- }
- return n - more;
-}
-
-#if 0
-/* Seems not to be needed. --drepper */
-int
-_IO_sync (fp)
- _IO_FILE *fp;
-{
- return 0;
-}
-#endif
-
-_IO_FILE *
-_IO_default_setbuf (fp, p, len)
- _IO_FILE *fp;
- char *p;
- _IO_ssize_t len;
-{
- if (_IO_SYNC (fp) == EOF)
- return NULL;
- if (p == NULL || len == 0)
- {
- fp->_flags |= _IO_UNBUFFERED;
- _IO_setb (fp, fp->_shortbuf, fp->_shortbuf+1, 0);
- }
- else
- {
- fp->_flags &= ~_IO_UNBUFFERED;
- _IO_setb (fp, p, p+len, 0);
- }
- fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end = 0;
- fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_read_end = 0;
- return fp;
-}
-
-_IO_off64_t
-_IO_default_seekpos (fp, pos, mode)
- _IO_FILE *fp;
- _IO_off64_t pos;
- int mode;
-{
- return _IO_SEEKOFF (fp, pos, 0, mode);
-}
-
-int
-_IO_default_doallocate (fp)
- _IO_FILE *fp;
-{
- char *buf;
-
- ALLOC_BUF (buf, _IO_BUFSIZ, EOF);
- _IO_setb (fp, buf, buf+_IO_BUFSIZ, 1);
- return 1;
-}
-
-void
-_IO_init (fp, flags)
- _IO_FILE *fp;
- int flags;
-{
- _IO_no_init (fp, flags, -1, NULL, NULL);
-}
-
-void
-_IO_no_init (fp, flags, orientation, wd, jmp)
- _IO_FILE *fp;
- int flags;
- int orientation;
- struct _IO_wide_data *wd;
- struct _IO_jump_t *jmp;
-{
- fp->_flags = _IO_MAGIC|flags;
- fp->_IO_buf_base = NULL;
- fp->_IO_buf_end = NULL;
- fp->_IO_read_base = NULL;
- fp->_IO_read_ptr = NULL;
- fp->_IO_read_end = NULL;
- fp->_IO_write_base = NULL;
- fp->_IO_write_ptr = NULL;
- fp->_IO_write_end = NULL;
- fp->_chain = NULL; /* Not necessary. */
-
- fp->_IO_save_base = NULL;
- fp->_IO_backup_base = NULL;
- fp->_IO_save_end = NULL;
- fp->_markers = NULL;
- fp->_cur_column = 0;
-#if _IO_JUMPS_OFFSET
- fp->_vtable_offset = 0;
-#endif
-#ifdef _IO_MTSAFE_IO
- _IO_lock_init (*fp->_lock);
-#endif
- fp->_mode = orientation;
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
- if (orientation >= 0)
- {
- fp->_wide_data = wd;
- fp->_wide_data->_IO_buf_base = NULL;
- fp->_wide_data->_IO_buf_end = NULL;
- fp->_wide_data->_IO_read_base = NULL;
- fp->_wide_data->_IO_read_ptr = NULL;
- fp->_wide_data->_IO_read_end = NULL;
- fp->_wide_data->_IO_write_base = NULL;
- fp->_wide_data->_IO_write_ptr = NULL;
- fp->_wide_data->_IO_write_end = NULL;
- fp->_wide_data->_IO_save_base = NULL;
- fp->_wide_data->_IO_backup_base = NULL;
- fp->_wide_data->_IO_save_end = NULL;
-
- fp->_wide_data->_wide_vtable = jmp;
- }
-#endif
-}
-
-int
-_IO_default_sync (fp)
- _IO_FILE *fp;
-{
- return 0;
-}
-
-/* The way the C++ classes are mapped into the C functions in the
- current implementation, this function can get called twice! */
-
-void
-_IO_default_finish (fp, dummy)
- _IO_FILE *fp;
- int dummy;
-{
- struct _IO_marker *mark;
- if (fp->_IO_buf_base && !(fp->_flags & _IO_USER_BUF))
- {
- FREE_BUF (fp->_IO_buf_base, _IO_blen (fp));
- fp->_IO_buf_base = fp->_IO_buf_end = NULL;
- }
-
- for (mark = fp->_markers; mark != NULL; mark = mark->_next)
- mark->_sbuf = NULL;
-
- if (fp->_IO_save_base)
- {
- free (fp->_IO_save_base);
- fp->_IO_save_base = NULL;
- }
-
-#ifdef _IO_MTSAFE_IO
- _IO_lock_fini (*fp->_lock);
-#endif
-
- _IO_un_link ((struct _IO_FILE_plus *) fp);
-}
-
-_IO_off64_t
-_IO_default_seekoff (fp, offset, dir, mode)
- _IO_FILE *fp;
- _IO_off64_t offset;
- int dir;
- int mode;
-{
- return _IO_pos_BAD;
-}
-
-int
-_IO_sputbackc (fp, c)
- _IO_FILE *fp;
- int c;
-{
- int result;
-
- if (fp->_IO_read_ptr > fp->_IO_read_base
- && (unsigned char)fp->_IO_read_ptr[-1] == (unsigned char)c)
- {
- fp->_IO_read_ptr--;
- result = (unsigned char) c;
- }
- else
- result = _IO_PBACKFAIL (fp, c);
-
- if (result != EOF)
- fp->_flags &= ~_IO_EOF_SEEN;
-
- return result;
-}
-
-int
-_IO_sungetc (fp)
- _IO_FILE *fp;
-{
- int result;
-
- if (fp->_IO_read_ptr > fp->_IO_read_base)
- {
- fp->_IO_read_ptr--;
- result = (unsigned char) *fp->_IO_read_ptr;
- }
- else
- result = _IO_PBACKFAIL (fp, EOF);
-
- if (result != EOF)
- fp->_flags &= ~_IO_EOF_SEEN;
-
- return result;
-}
-
-#if 0 /* Work in progress */
-/* Seems not to be needed. */
-#if 0
-void
-_IO_set_column (fp, c)
- _IO_FILE *fp;
- int c;
-{
- if (c == -1)
- fp->_column = -1;
- else
- fp->_column = c - (fp->_IO_write_ptr - fp->_IO_write_base);
-}
-#else
-int
-_IO_set_column (fp, i)
- _IO_FILE *fp;
- int i;
-{
- fp->_cur_column = i + 1;
- return 0;
-}
-#endif
-#endif
-
-
-unsigned
-_IO_adjust_column (start, line, count)
- unsigned start;
- const char *line;
- int count;
-{
- const char *ptr = line + count;
- while (ptr > line)
- if (*--ptr == '\n')
- return line + count - ptr - 1;
- return start + count;
-}
-
-#if 0
-/* Seems not to be needed. --drepper */
-int
-_IO_get_column (fp)
- _IO_FILE *fp;
-{
- if (fp->_cur_column)
- return _IO_adjust_column (fp->_cur_column - 1,
- fp->_IO_write_base,
- fp->_IO_write_ptr - fp->_IO_write_base);
- return -1;
-}
-#endif
-
-int
-_IO_flush_all ()
-{
- int result = 0;
- struct _IO_FILE *fp;
- for (fp = (_IO_FILE *) _IO_list_all; fp; fp = fp->_chain)
- if (((fp->_mode < 0 && fp->_IO_write_ptr > fp->_IO_write_base)
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
- || (fp->_vtable_offset == 0
- && fp->_mode > 0 && (fp->_wide_data->_IO_write_ptr
- > fp->_wide_data->_IO_write_base))
-#endif
- )
- && _IO_OVERFLOW (fp, EOF) == EOF)
- result = EOF;
- return result;
-}
-
-void
-_IO_flush_all_linebuffered ()
-{
- struct _IO_FILE *fp;
- for (fp = (_IO_FILE *) _IO_list_all; fp; fp = fp->_chain)
- if ((fp->_flags & _IO_NO_WRITES) == 0 && fp->_flags & _IO_LINE_BUF)
- _IO_OVERFLOW (fp, EOF);
-}
-
-static void _IO_unbuffer_write __P ((void));
-
-static void
-_IO_unbuffer_write ()
-{
- struct _IO_FILE *fp;
- for (fp = (_IO_FILE *) _IO_list_all; fp; fp = fp->_chain)
- if (! (fp->_flags & _IO_UNBUFFERED)
- && (! (fp->_flags & _IO_NO_WRITES)
- || (fp->_flags & _IO_IS_APPENDING))
- /* Iff stream is un-orientated, it wasn't used. */
- && fp->_mode != 0)
- _IO_SETBUF (fp, NULL, 0);
-}
-
-int
-_IO_cleanup ()
-{
- int result = _IO_flush_all ();
-
- /* We currently don't have a reliable mechanism for making sure that
- C++ static destructors are executed in the correct order.
- So it is possible that other static destructors might want to
- write to cout - and they're supposed to be able to do so.
-
- The following will make the standard streambufs be unbuffered,
- which forces any output from late destructors to be written out. */
- _IO_unbuffer_write ();
-
- return result;
-}
-
-
-void
-_IO_init_marker (marker, fp)
- struct _IO_marker *marker;
- _IO_FILE *fp;
-{
- marker->_sbuf = fp;
- if (_IO_in_put_mode (fp))
- _IO_switch_to_get_mode (fp);
- if (_IO_in_backup (fp))
- marker->_pos = fp->_IO_read_ptr - fp->_IO_read_end;
- else
- marker->_pos = fp->_IO_read_ptr - fp->_IO_read_base;
-
- /* Should perhaps sort the chain? */
- marker->_next = fp->_markers;
- fp->_markers = marker;
-}
-
-void
-_IO_remove_marker (marker)
- struct _IO_marker *marker;
-{
- /* Unlink from sb's chain. */
- struct _IO_marker **ptr = &marker->_sbuf->_markers;
- for (; ; ptr = &(*ptr)->_next)
- {
- if (*ptr == NULL)
- break;
- else if (*ptr == marker)
- {
- *ptr = marker->_next;
- return;
- }
- }
-#if 0
- if _sbuf has a backup area that is no longer needed, should we delete
- it now, or wait until the next underflow?
-#endif
-}
-
-#define BAD_DELTA EOF
-
-int
-_IO_marker_difference (mark1, mark2)
- struct _IO_marker *mark1;
- struct _IO_marker *mark2;
-{
- return mark1->_pos - mark2->_pos;
-}
-
-/* Return difference between MARK and current position of MARK's stream. */
-int
-_IO_marker_delta (mark)
- struct _IO_marker *mark;
-{
- int cur_pos;
- if (mark->_sbuf == NULL)
- return BAD_DELTA;
- if (_IO_in_backup (mark->_sbuf))
- cur_pos = mark->_sbuf->_IO_read_ptr - mark->_sbuf->_IO_read_end;
- else
- cur_pos = mark->_sbuf->_IO_read_ptr - mark->_sbuf->_IO_read_base;
- return mark->_pos - cur_pos;
-}
-
-int
-_IO_seekmark (fp, mark, delta)
- _IO_FILE *fp;
- struct _IO_marker *mark;
- int delta;
-{
- if (mark->_sbuf != fp)
- return EOF;
- if (mark->_pos >= 0)
- {
- if (_IO_in_backup (fp))
- _IO_switch_to_main_get_area (fp);
- fp->_IO_read_ptr = fp->_IO_read_base + mark->_pos;
- }
- else
- {
- if (!_IO_in_backup (fp))
- _IO_switch_to_backup_area (fp);
- fp->_IO_read_ptr = fp->_IO_read_end + mark->_pos;
- }
- return 0;
-}
-
-void
-_IO_unsave_markers (fp)
- _IO_FILE *fp;
-{
- struct _IO_marker *mark = fp->_markers;
- if (mark)
- {
-#ifdef TODO
- streampos offset = seekoff (0, ios::cur, ios::in);
- if (offset != EOF)
- {
- offset += eGptr () - Gbase ();
- for ( ; mark != NULL; mark = mark->_next)
- mark->set_streampos (mark->_pos + offset);
- }
- else
- {
- for ( ; mark != NULL; mark = mark->_next)
- mark->set_streampos (EOF);
- }
-#endif
- fp->_markers = 0;
- }
-
- if (_IO_have_backup (fp))
- _IO_free_backup_area (fp);
-}
-
-#if 0
-/* Seems not to be needed. --drepper */
-int
-_IO_nobackup_pbackfail (fp, c)
- _IO_FILE *fp;
- int c;
-{
- if (fp->_IO_read_ptr > fp->_IO_read_base)
- fp->_IO_read_ptr--;
- if (c != EOF && *fp->_IO_read_ptr != c)
- *fp->_IO_read_ptr = c;
- return (unsigned char) c;
-}
-#endif
-
-int
-_IO_default_pbackfail (fp, c)
- _IO_FILE *fp;
- int c;
-{
- if (fp->_IO_read_ptr > fp->_IO_read_base && !_IO_in_backup (fp)
- && (unsigned char) fp->_IO_read_ptr[-1] == c)
- --fp->_IO_read_ptr;
- else
- {
- /* Need to handle a filebuf in write mode (switch to read mode). FIXME!*/
- if (!_IO_in_backup (fp))
- {
- /* We need to keep the invariant that the main get area
- logically follows the backup area. */
- if (fp->_IO_read_ptr > fp->_IO_read_base && _IO_have_backup (fp))
- {
- if (save_for_backup (fp, fp->_IO_read_ptr))
- return EOF;
- }
- else if (!_IO_have_backup (fp))
- {
- /* No backup buffer: allocate one. */
- /* Use nshort buffer, if unused? (probably not) FIXME */
- int backup_size = 128;
- char *bbuf = (char *) malloc (backup_size);
- if (bbuf == NULL)
- return EOF;
- fp->_IO_save_base = bbuf;
- fp->_IO_save_end = fp->_IO_save_base + backup_size;
- fp->_IO_backup_base = fp->_IO_save_end;
- }
- fp->_IO_read_base = fp->_IO_read_ptr;
- _IO_switch_to_backup_area (fp);
- }
- else if (fp->_IO_read_ptr <= fp->_IO_read_base)
- {
- /* Increase size of existing backup buffer. */
- _IO_size_t new_size;
- _IO_size_t old_size = fp->_IO_read_end - fp->_IO_read_base;
- char *new_buf;
- new_size = 2 * old_size;
- new_buf = (char *) malloc (new_size);
- if (new_buf == NULL)
- return EOF;
- memcpy (new_buf + (new_size - old_size), fp->_IO_read_base,
- old_size);
- free (fp->_IO_read_base);
- _IO_setg (fp, new_buf, new_buf + (new_size - old_size),
- new_buf + new_size);
- fp->_IO_backup_base = fp->_IO_read_ptr;
- }
-
- *--fp->_IO_read_ptr = c;
- }
- return (unsigned char) c;
-}
-
-_IO_off64_t
-_IO_default_seek (fp, offset, dir)
- _IO_FILE *fp;
- _IO_off64_t offset;
- int dir;
-{
- return _IO_pos_BAD;
-}
-
-int
-_IO_default_stat (fp, st)
- _IO_FILE *fp;
- void* st;
-{
- return EOF;
-}
-
-_IO_ssize_t
-_IO_default_read (fp, data, n)
- _IO_FILE* fp;
- void *data;
- _IO_ssize_t n;
-{
- return -1;
-}
-
-_IO_ssize_t
-_IO_default_write (fp, data, n)
- _IO_FILE *fp;
- const void *data;
- _IO_ssize_t n;
-{
- return 0;
-}
-
-int
-_IO_default_showmanyc (fp)
- _IO_FILE *fp;
-{
- return -1;
-}
-
-void
-_IO_default_imbue (fp, locale)
- _IO_FILE *fp;
- void *locale;
-{
-}
-
-_IO_ITER
-_IO_iter_begin()
-{
- return (_IO_ITER) _IO_list_all;
-}
-
-_IO_ITER
-_IO_iter_end()
-{
- return NULL;
-}
-
-_IO_ITER
-_IO_iter_next(iter)
- _IO_ITER iter;
-{
- return iter->_chain;
-}
-
-_IO_FILE *
-_IO_iter_file(iter)
- _IO_ITER iter;
-{
- return iter;
-}
-
-void
-_IO_list_lock()
-{
-#ifdef _IO_MTSAFE_IO
- _IO_lock_lock (list_all_lock);
-#endif
-}
-
-void
-_IO_list_unlock()
-{
-#ifdef _IO_MTSAFE_IO
- _IO_lock_unlock (list_all_lock);
-#endif
-}
-
-void
-_IO_list_resetlock()
-{
-#ifdef _IO_MTSAFE_IO
- _IO_lock_init (list_all_lock);
-#endif
-}
-
-
-#ifdef TODO
-#if defined(linux)
-#define IO_CLEANUP ;
-#endif
-
-#ifdef IO_CLEANUP
- IO_CLEANUP
-#else
-struct __io_defs {
- __io_defs() { }
- ~__io_defs() { _IO_cleanup (); }
-};
-__io_defs io_defs__;
-#endif
-
-#endif /* TODO */
-
-#ifdef weak_alias
-weak_alias (_IO_cleanup, _cleanup)
-#endif
-
-#ifdef text_set_element
-text_set_element(__libc_atexit, _cleanup);
-#endif
projects / msp430-gcc.git / blobdiff