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-rw-r--r--contrib/libg++/libio/fileops.c755
1 files changed, 0 insertions, 755 deletions
diff --git a/contrib/libg++/libio/fileops.c b/contrib/libg++/libio/fileops.c
deleted file mode 100644
index 812af94d0f95..000000000000
--- a/contrib/libg++/libio/fileops.c
+++ /dev/null
@@ -1,755 +0,0 @@
-/*
-Copyright (C) 1993, 1995 Free Software Foundation
-
-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. */
-
-/* written by Per Bothner (bothner@cygnus.com) */
-
-#define _POSIX_SOURCE
-#include "libioP.h"
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <errno.h>
-#ifndef errno
-extern int errno;
-#endif
-
-/* An fstream can be in at most one of put mode, get mode, or putback mode.
- Putback mode is a variant of get mode.
-
- In a filebuf, there is only one current position, instead of two
- separate get and put pointers. In get mode, the current posistion
- is that of gptr(); in put mode that of pptr().
-
- The position in the buffer that corresponds to the position
- in external file system is normally _IO_read_end, except in putback
- mode, when it is _IO_save_end.
- If the field _fb._offset is >= 0, it gives the offset in
- the file as a whole corresponding to eGptr(). (?)
-
- PUT MODE:
- If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end,
- and _IO_read_base are equal to each other. These are usually equal
- to _IO_buf_base, though not necessarily if we have switched from
- get mode to put mode. (The reason is to maintain the invariant
- that _IO_read_end corresponds to the external file position.)
- _IO_write_base is non-NULL and usually equal to _IO_base_base.
- We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode.
- The un-flushed character are those between _IO_write_base and _IO_write_ptr.
-
- GET MODE:
- If a filebuf is in get or putback mode, eback() != egptr().
- In get mode, the unread characters are between gptr() and egptr().
- The OS file position corresponds to that of egptr().
-
- PUTBACK MODE:
- Putback mode is used to remember "excess" characters that have
- been sputbackc'd in a separate putback buffer.
- In putback mode, the get buffer points to the special putback buffer.
- The unread characters are the characters between gptr() and egptr()
- in the putback buffer, as well as the area between save_gptr()
- and save_egptr(), which point into the original reserve buffer.
- (The pointers save_gptr() and save_egptr() are the values
- of gptr() and egptr() at the time putback mode was entered.)
- The OS position corresponds to that of save_egptr().
-
- LINE BUFFERED OUTPUT:
- During line buffered output, _IO_write_base==base() && epptr()==base().
- However, ptr() may be anywhere between base() and ebuf().
- This forces a call to filebuf::overflow(int C) on every put.
- If there is more space in the buffer, and C is not a '\n',
- then C is inserted, and pptr() incremented.
-
- UNBUFFERED STREAMS:
- If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer.
-*/
-
-#define CLOSED_FILEBUF_FLAGS \
- (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET)
-
-
-void
-DEFUN(_IO_file_init, (fp),
- register _IO_FILE *fp)
-{
- /* POSIX.1 allows another file handle to be used to change the position
- of our file descriptor. Hence we actually don't know the actual
- position before we do the first fseek (and until a following fflush). */
- fp->_offset = _IO_pos_BAD;
- fp->_IO_file_flags |= CLOSED_FILEBUF_FLAGS;
-
- _IO_link_in(fp);
- fp->_fileno = -1;
-}
-
-int
-DEFUN(_IO_file_close_it, (fp),
- register _IO_FILE* fp)
-{
- int write_status, close_status;
- if (!_IO_file_is_open(fp))
- return EOF;
-
- write_status = _IO_do_flush (fp);
-
- _IO_unsave_markers(fp);
-
- close_status = _IO_SYSCLOSE (fp);
-
- /* Free buffer. */
- _IO_setb(fp, NULL, NULL, 0);
- _IO_setg(fp, NULL, NULL, NULL);
- _IO_setp(fp, NULL, NULL);
-
- _IO_un_link(fp);
- fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS;
- fp->_fileno = EOF;
- fp->_offset = _IO_pos_BAD;
-
- return close_status ? close_status : write_status;
-}
-
-void
-DEFUN(_IO_file_finish, (fp),
- register _IO_FILE* fp)
-{
- if (_IO_file_is_open(fp))
- {
- _IO_do_flush (fp);
- if (!(fp->_flags & _IO_DELETE_DONT_CLOSE))
- _IO_SYSCLOSE (fp);
- }
- _IO_default_finish(fp);
-}
-
-_IO_FILE *
-DEFUN(_IO_file_fopen, (fp, filename, mode),
- register _IO_FILE *fp AND const char *filename AND const char *mode)
-{
- int oflags = 0, omode;
- int read_write, fdesc;
- int oprot = 0666;
- if (_IO_file_is_open (fp))
- return 0;
- switch (*mode++) {
- case 'r':
- omode = O_RDONLY;
- read_write = _IO_NO_WRITES;
- break;
- case 'w':
- omode = O_WRONLY;
- oflags = O_CREAT|O_TRUNC;
- read_write = _IO_NO_READS;
- break;
- case 'a':
- omode = O_WRONLY;
- oflags = O_CREAT|O_APPEND;
- read_write = _IO_NO_READS|_IO_IS_APPENDING;
- break;
- default:
- errno = EINVAL;
- return NULL;
- }
- if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+')) {
- omode = O_RDWR;
- read_write &= _IO_IS_APPENDING;
- }
- fdesc = open(filename, omode|oflags, oprot);
- if (fdesc < 0)
- return NULL;
- fp->_fileno = fdesc;
- _IO_mask_flags(fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
- if (read_write & _IO_IS_APPENDING)
- if (_IO_SEEKOFF (fp, (_IO_off_t)0, _IO_seek_end, _IOS_INPUT|_IOS_OUTPUT)
- == _IO_pos_BAD)
- return NULL;
- _IO_link_in(fp);
- return fp;
-}
-
-_IO_FILE*
-DEFUN(_IO_file_attach, (fp, fd),
- _IO_FILE *fp AND int fd)
-{
- if (_IO_file_is_open(fp))
- return NULL;
- fp->_fileno = fd;
- fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES);
- fp->_flags |= _IO_DELETE_DONT_CLOSE;
- fp->_offset = _IO_pos_BAD;
- return fp;
-}
-
-_IO_FILE*
-DEFUN(_IO_file_setbuf, (fp, p, len),
- register _IO_FILE *fp AND char* p AND _IO_ssize_t len)
-{
- if (_IO_default_setbuf(fp, p, len) == NULL)
- return NULL;
-
- fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end
- = fp->_IO_buf_base;
- _IO_setg(fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
-
- return fp;
-}
-
-/* Write TO_DO bytes from DATA to FP.
- Then mark FP as having empty buffers. */
-
-int
-DEFUN(_IO_do_write, (fp, data, to_do),
- register _IO_FILE *fp AND const char* data AND _IO_size_t to_do)
-{
- _IO_size_t count;
- if (to_do == 0)
- return 0;
- else
- {
- if (fp->_flags & _IO_IS_APPENDING)
- /* On a system without a proper O_APPEND implementation,
- you would need to sys_seek(0, SEEK_END) here, but is
- is not needed nor desirable for Unix- or Posix-like systems.
- Instead, just indicate that offset (before and after) is
- unpredictable. */
- fp->_offset = _IO_pos_BAD;
- else if (fp->_IO_read_end != fp->_IO_write_base)
- {
- _IO_pos_t new_pos
- = _IO_SYSSEEK(fp, fp->_IO_write_base - fp->_IO_read_end, 1);
- if (new_pos == _IO_pos_BAD)
- return EOF;
- fp->_offset = new_pos;
- }
- count = _IO_SYSWRITE (fp, data, to_do);
- if (fp->_cur_column)
- fp->_cur_column
- = _IO_adjust_column (fp->_cur_column - 1, data, to_do) + 1;
- }
- _IO_setg(fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
- fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base;
- fp->_IO_write_end = (fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) ? fp->_IO_buf_base
- : fp->_IO_buf_end;
- return count != to_do ? EOF : 0;
-}
-
-int
-DEFUN(_IO_file_underflow, (fp),
- register _IO_FILE *fp)
-{
- _IO_ssize_t count;
-#if 0
- /* SysV does not make this test; take it out for compatibility */
- if (fp->_flags & _IO_EOF_SEEN)
- return (EOF);
-#endif
-
- if (fp->_flags & _IO_NO_READS)
- return EOF;
- if (fp->_IO_read_ptr < fp->_IO_read_end)
- return *(unsigned char*)fp->_IO_read_ptr;
-
- if (fp->_IO_buf_base == NULL)
- _IO_doallocbuf(fp);
-
- /* Flush all line buffered files before reading. */
- /* FIXME This can/should be moved to genops ?? */
- if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED))
- _IO_flush_all_linebuffered();
-
- _IO_switch_to_get_mode(fp);
-
- count = _IO_SYSREAD (fp, fp->_IO_buf_base,
- fp->_IO_buf_end - fp->_IO_buf_base);
- if (count <= 0)
- {
- if (count == 0)
- fp->_flags |= _IO_EOF_SEEN;
- else
- fp->_flags |= _IO_ERR_SEEN, count = 0;
- }
- fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base;
- fp->_IO_read_end = fp->_IO_buf_base + count;
- fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end
- = fp->_IO_buf_base;
- if (count == 0)
- return EOF;
- if (fp->_offset != _IO_pos_BAD)
- _IO_pos_adjust(fp->_offset, count);
- return *(unsigned char*)fp->_IO_read_ptr;
-}
-
-int
-DEFUN(_IO_file_overflow, (f, ch),
- register _IO_FILE* f AND int ch)
-{
- if (f->_flags & _IO_NO_WRITES) /* SET ERROR */
- return EOF;
- /* If currently reading or no buffer allocated. */
- if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0)
- {
- /* Allocate a buffer if needed. */
- if (f->_IO_write_base == 0)
- {
- _IO_doallocbuf(f);
- _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base);
- }
- /* Otherwise must be currently reading.
- If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end,
- logically slide the buffer forwards one block (by setting the
- read pointers to all point at the beginning of the block). This
- makes room for subsequent output.
- Otherwise, set the read pointers to _IO_read_end (leaving that
- alone, so it can continue to correspond to the external position). */
- if (f->_IO_read_ptr == f->_IO_buf_end)
- f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base;
- f->_IO_write_ptr = f->_IO_read_ptr;
- f->_IO_write_base = f->_IO_write_ptr;
- f->_IO_write_end = f->_IO_buf_end;
- f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end;
-
- if (f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
- f->_IO_write_end = f->_IO_write_ptr;
- f->_flags |= _IO_CURRENTLY_PUTTING;
- }
- if (ch == EOF)
- return _IO_do_flush(f);
- if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */
- if (_IO_do_flush(f) == EOF)
- return EOF;
- *f->_IO_write_ptr++ = ch;
- if ((f->_flags & _IO_UNBUFFERED)
- || ((f->_flags & _IO_LINE_BUF) && ch == '\n'))
- if (_IO_do_flush(f) == EOF)
- return EOF;
- return (unsigned char)ch;
-}
-
-int
-DEFUN(_IO_file_sync, (fp),
- register _IO_FILE* fp)
-{
- _IO_size_t delta;
- /* char* ptr = cur_ptr(); */
- if (fp->_IO_write_ptr > fp->_IO_write_base)
- if (_IO_do_flush(fp)) return EOF;
- delta = fp->_IO_read_ptr - fp->_IO_read_end;
- if (delta != 0)
- {
-#ifdef TODO
- if (_IO_in_backup(fp))
- delta -= eGptr() - Gbase();
-#endif
- _IO_off_t new_pos = _IO_SYSSEEK (fp, delta, 1);
- if (new_pos != (_IO_off_t)EOF)
- fp->_IO_read_end = fp->_IO_read_ptr;
-#ifdef ESPIPE
- else if (errno == ESPIPE)
- ; /* Ignore error from unseekable devices. */
-#endif
- else
- return EOF;
- }
- fp->_offset = _IO_pos_BAD;
- /* FIXME: Cleanup - can this be shared? */
- /* setg(base(), ptr, ptr); */
- return 0;
-}
-
-_IO_pos_t
-DEFUN(_IO_file_seekoff, (fp, offset, dir, mode),
- register _IO_FILE *fp AND _IO_off_t offset AND int dir AND int mode)
-{
- _IO_pos_t result;
- _IO_off_t delta, new_offset;
- long count;
-
- if (mode == 0)
- dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */
-
- /* Flush unwritten characters.
- (This may do an unneeded write if we seek within the buffer.
- But to be able to switch to reading, we would need to set
- egptr to ptr. That can't be done in the current design,
- which assumes file_ptr() is eGptr. Anyway, since we probably
- end up flushing when we close(), it doesn't make much difference.)
- FIXME: simulate mem-papped files. */
-
- if (fp->_IO_write_ptr > fp->_IO_write_base || _IO_in_put_mode(fp))
- if (_IO_switch_to_get_mode(fp)) return EOF;
-
- if (fp->_IO_buf_base == NULL)
- {
- _IO_doallocbuf(fp);
- _IO_setp(fp, fp->_IO_buf_base, fp->_IO_buf_base);
- _IO_setg(fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
- }
-
- switch (dir)
- {
- case _IO_seek_cur:
- /* Adjust for read-ahead (bytes is buffer). */
- offset -= fp->_IO_read_end - fp->_IO_read_ptr;
- if (fp->_offset == _IO_pos_BAD)
- goto dumb;
- /* Make offset absolute, assuming current pointer is file_ptr(). */
- offset += _IO_pos_as_off(fp->_offset);
-
- dir = _IO_seek_set;
- break;
- case _IO_seek_set:
- break;
- case _IO_seek_end:
- {
- struct stat st;
- if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG(st.st_mode))
- {
- offset += st.st_size;
- dir = _IO_seek_set;
- }
- else
- goto dumb;
- }
- }
- /* At this point, dir==_IO_seek_set. */
-
- /* If destination is within current buffer, optimize: */
- if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL
- && !_IO_in_backup (fp))
- {
- /* Offset relative to start of main get area. */
- _IO_pos_t rel_offset = offset - fp->_offset
- + (fp->_IO_read_end - fp->_IO_read_base);
- if (rel_offset >= 0)
- {
-#if 0
- if (_IO_in_backup(fp))
- _IO_switch_to_main_get_area(fp);
-#endif
- if (rel_offset <= fp->_IO_read_end - fp->_IO_read_base)
- {
- _IO_setg(fp, fp->_IO_buf_base, fp->_IO_buf_base + rel_offset,
- fp->_IO_read_end);
- _IO_setp(fp, fp->_IO_buf_base, fp->_IO_buf_base);
- return offset;
- }
-#ifdef TODO
- /* If we have streammarkers, seek forward by reading ahead. */
- if (_IO_have_markers(fp))
- {
- int to_skip = rel_offset
- - (fp->_IO_read_ptr - fp->_IO_read_base);
- if (ignore(to_skip) != to_skip)
- goto dumb;
- return offset;
- }
-#endif
- }
-#ifdef TODO
- if (rel_offset < 0 && rel_offset >= Bbase() - Bptr())
- {
- if (!_IO_in_backup(fp))
- _IO_switch_to_backup_area(fp);
- gbump(fp->_IO_read_end + rel_offset - fp->_IO_read_ptr);
- return offset;
- }
-#endif
- }
-
-#ifdef TODO
- _IO_unsave_markers(fp);
-#endif
-
- if (fp->_flags & _IO_NO_READS)
- goto dumb;
-
- /* Try to seek to a block boundary, to improve kernel page management. */
- new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1);
- delta = offset - new_offset;
- if (delta > fp->_IO_buf_end - fp->_IO_buf_base)
- {
- new_offset = offset;
- delta = 0;
- }
- result = _IO_SYSSEEK (fp, new_offset, 0);
- if (result < 0)
- return EOF;
- if (delta == 0)
- count = 0;
- else
- {
- count = _IO_SYSREAD (fp, fp->_IO_buf_base,
- fp->_IO_buf_end - fp->_IO_buf_base);
- if (count < delta)
- {
- /* We weren't allowed to read, but try to seek the remainder. */
- offset = count == EOF ? delta : delta-count;
- dir = _IO_seek_cur;
- goto dumb;
- }
- }
- _IO_setg(fp, fp->_IO_buf_base, fp->_IO_buf_base+delta, fp->_IO_buf_base+count);
- _IO_setp(fp, fp->_IO_buf_base, fp->_IO_buf_base);
- fp->_offset = result + count;
- _IO_mask_flags(fp, 0, _IO_EOF_SEEN);
- return offset;
- dumb:
-
- _IO_unsave_markers(fp);
- result = _IO_SYSSEEK (fp, offset, dir);
- if (result != EOF)
- _IO_mask_flags(fp, 0, _IO_EOF_SEEN);
- fp->_offset = result;
- _IO_setg(fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
- _IO_setp(fp, fp->_IO_buf_base, fp->_IO_buf_base);
- return result;
-}
-
-_IO_ssize_t
-DEFUN(_IO_file_read, (fp, buf, size),
- register _IO_FILE* fp AND void* buf AND _IO_ssize_t size)
-{
- for (;;)
- {
- _IO_ssize_t count = _IO_read(fp->_fileno, buf, size);
-#ifdef EINTR
- if (count == -1 && errno == EINTR)
- continue;
-#endif
- return count;
- }
-}
-
-_IO_pos_t
-DEFUN(_IO_file_seek, (fp, offset, dir),
- _IO_FILE *fp AND _IO_off_t offset AND int dir)
-{
- return _IO_lseek(fp->_fileno, offset, dir);
-}
-
-int
-DEFUN(_IO_file_stat, (fp, st),
- _IO_FILE *fp AND void* st)
-{
- return _IO_fstat(fp->_fileno, (struct stat*)st);
-}
-
-int
-DEFUN(_IO_file_close, (fp),
- _IO_FILE* fp)
-{
- return _IO_close(fp->_fileno);
-}
-
-_IO_ssize_t
-DEFUN(_IO_file_write, (f, data, n),
- register _IO_FILE* f AND const void* data AND _IO_ssize_t n)
-{
- _IO_ssize_t to_do = n;
- while (to_do > 0)
- {
- _IO_ssize_t count = _IO_write(f->_fileno, data, to_do);
- if (count == EOF)
- {
-#ifdef EINTR
- if (errno == EINTR)
- continue;
- else
-#endif
- {
- f->_flags |= _IO_ERR_SEEN;
- break;
- }
- }
- to_do -= count;
- data = (void*)((char*)data + count);
- }
- n -= to_do;
- if (f->_offset >= 0)
- f->_offset += n;
- return n;
-}
-
-_IO_size_t
-DEFUN(_IO_file_xsputn, (f, data, n),
- _IO_FILE *f AND const void *data AND _IO_size_t n)
-{
- register const char *s = (char*) data;
- _IO_size_t to_do = n;
- int must_flush = 0;
- _IO_size_t count;
-
- if (n <= 0)
- return 0;
- /* This is an optimized implementation.
- If the amount to be written straddles a block boundary
- (or the filebuf is unbuffered), use sys_write directly. */
-
- /* First figure out how much space is available in the buffer. */
- count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */
- if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING))
- {
- count = f->_IO_buf_end - f->_IO_write_ptr;
- if (count >= n)
- { register const char *p;
- for (p = s + n; p > s; )
- {
- if (*--p == '\n') {
- count = p - s + 1;
- must_flush = 1;
- break;
- }
- }
- }
- }
- /* Then fill the buffer. */
- if (count > 0)
- {
- if (count > to_do)
- count = to_do;
- if (count > 20) {
- memcpy(f->_IO_write_ptr, s, count);
- s += count;
- }
- else
- {
- register char *p = f->_IO_write_ptr;
- register int i = (int)count;
- while (--i >= 0) *p++ = *s++;
- }
- f->_IO_write_ptr += count;
- to_do -= count;
- }
- if (to_do + must_flush > 0)
- { _IO_size_t block_size, dont_write;
- /* Next flush the (full) buffer. */
- if (__overflow(f, EOF) == EOF)
- return n - to_do;
-
- /* Try to maintain alignment: write a whole number of blocks.
- dont_write is what gets left over. */
- block_size = f->_IO_buf_end - f->_IO_buf_base;
- dont_write = block_size >= 128 ? to_do % block_size : 0;
-
- count = to_do - dont_write;
- if (_IO_do_write(f, s, count) == EOF)
- return n - to_do;
- to_do = dont_write;
-
- /* Now write out the remainder. Normally, this will fit in the
- buffer, but it's somewhat messier for line-buffered files,
- so we let _IO_default_xsputn handle the general case. */
- if (dont_write)
- to_do -= _IO_default_xsputn(f, s+count, dont_write);
- }
- return n - to_do;
-}
-
-#if 0
-/* Work in progress */
-_IO_size_t
-DEFUN(_IO_file_xsgetn, (fp, data, n),
- _IO_FILE *fp AND void *data AND _IO_size_t n)
-{
- register _IO_size_t more = n;
- register char *s = data;
- for (;;)
- {
- _IO_ssize_t count = fp->_IO_read_end - fp->_IO_read_ptr; /* Data available. */
- if (count > 0)
- {
- if (count > more)
- count = more;
- if (count > 20)
- {
- memcpy(s, fp->_IO_read_ptr, count);
- s += count;
- fp->_IO_read_ptr += count;
- }
- else if (count <= 0)
- count = 0;
- else
- {
- register char *p = fp->_IO_read_ptr;
- register int i = (int)count;
- while (--i >= 0) *s++ = *p++;
- fp->_IO_read_ptr = p;
- }
- more -= count;
- }
-#if 0
- if (! _IO_in put_mode (fp)
- && ! _IO_have_markers (fp) && ! IO_have_backup (fp))
- {
- /* This is an optimization of _IO_file_underflow */
- if (fp->_flags & _IO_NO_READS)
- break;
- /* If we're reading a lot of data, don't bother allocating
- a buffer. But if we're only reading a bit, perhaps we should ??*/
- if (count <= 512 && fp->_IO_buf_base == NULL)
- _IO_doallocbuf(fp);
- if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED))
- _IO_flush_all_linebuffered();
-
- _IO_switch_to_get_mode(fp); ???;
- count = _IO_SYSREAD (fp, s, more);
- if (count <= 0)
- {
- if (count == 0)
- fp->_flags |= _IO_EOF_SEEN;
- else
- fp->_flags |= _IO_ERR_SEEN, count = 0;
- }
-
- s += count;
- more -= count;
- }
-#endif
- if (more == 0 || __underflow(fp) == EOF)
- break;
- }
- return n - more;
-}
-#endif
-
-struct _IO_jump_t _IO_file_jumps = {
- JUMP_INIT_DUMMY,
- JUMP_INIT(finish, _IO_file_finish),
- JUMP_INIT(overflow, _IO_file_overflow),
- JUMP_INIT(underflow, _IO_file_underflow),
- JUMP_INIT(uflow, _IO_default_uflow),
- JUMP_INIT(pbackfail, _IO_default_pbackfail),
- JUMP_INIT(xsputn, _IO_file_xsputn),
- JUMP_INIT(xsgetn, _IO_default_xsgetn),
- JUMP_INIT(seekoff, _IO_file_seekoff),
- JUMP_INIT(seekpos, _IO_default_seekpos),
- JUMP_INIT(setbuf, _IO_file_setbuf),
- JUMP_INIT(sync, _IO_file_sync),
- JUMP_INIT(doallocate, _IO_file_doallocate),
- JUMP_INIT(read, _IO_file_read),
- JUMP_INIT(write, _IO_file_write),
- JUMP_INIT(seek, _IO_file_seek),
- JUMP_INIT(close, _IO_file_close),
- JUMP_INIT(stat, _IO_file_stat)
-};