diff options
Diffstat (limited to 'libio/oldfileops.c')
| -rw-r--r-- | libio/oldfileops.c | 792 |
1 files changed, 0 insertions, 792 deletions
diff --git a/libio/oldfileops.c b/libio/oldfileops.c deleted file mode 100644 index 2eceefa68a..0000000000 --- a/libio/oldfileops.c +++ /dev/null @@ -1,792 +0,0 @@ -/* Copyright (C) 1993-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Written by Per Bothner <bothner@cygnus.com>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. - - As a special exception, if you link the code in this file with - files compiled with a GNU compiler to produce an executable, - that does not cause the resulting executable to be covered by - the GNU Lesser General Public License. This exception does not - however invalidate any other reasons why the executable file - might be covered by the GNU Lesser General Public License. - This exception applies to code released by its copyright holders - in files containing the exception. */ - -/* This is a compatibility file. If we don't build the libc with - versioning don't compile this file. */ -#include <shlib-compat.h> -#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) - -#ifndef _POSIX_SOURCE -# define _POSIX_SOURCE -#endif -#define _IO_USE_OLD_IO_FILE -#include "libioP.h" -#include <fcntl.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <string.h> -#include <errno.h> -#include <stdlib.h> -#include <unistd.h> -#ifndef errno -extern int errno; -#endif -#ifndef __set_errno -# define __set_errno(Val) errno = (Val) -#endif - - -#ifdef _LIBC -# define open(Name, Flags, Prot) __open (Name, Flags, Prot) -# define close(FD) __close (FD) -# define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence) -# define read(FD, Buf, NBytes) __read (FD, Buf, NBytes) -# define write(FD, Buf, NBytes) __write (FD, Buf, NBytes) -#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 position - 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_buf_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 -attribute_compat_text_section -_IO_old_file_init_internal (struct _IO_FILE_plus *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->file._old_offset = _IO_pos_BAD; - fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS; - - _IO_link_in (fp); - fp->file._vtable_offset = ((int) sizeof (struct _IO_FILE) - - (int) sizeof (struct _IO_FILE_complete)); - fp->file._fileno = -1; - -#if defined SHARED && defined _LIBC - if (__builtin_expect (&_IO_stdin_used != NULL, 1) - || (fp != (struct _IO_FILE_plus *) _IO_stdin - && fp != (struct _IO_FILE_plus *) _IO_stdout - && fp != (struct _IO_FILE_plus *) _IO_stderr)) - /* The object is dynamically allocated and large enough. Initialize - the _mode element as well. */ - ((struct _IO_FILE_complete *) fp)->_mode = -1; -#endif -} - -void -attribute_compat_text_section -_IO_old_file_init (struct _IO_FILE_plus *fp) -{ - IO_set_accept_foreign_vtables (&_IO_vtable_check); - _IO_old_file_init_internal (fp); -} - -int -attribute_compat_text_section -_IO_old_file_close_it (_IO_FILE *fp) -{ - int write_status, close_status; - if (!_IO_file_is_open (fp)) - return EOF; - - write_status = _IO_old_do_flush (fp); - - _IO_unsave_markers (fp); - - close_status = ((fp->_flags2 & _IO_FLAGS2_NOCLOSE) == 0 - ? _IO_SYSCLOSE (fp) : 0); - - /* Free buffer. */ - _IO_setb (fp, NULL, NULL, 0); - _IO_setg (fp, NULL, NULL, NULL); - _IO_setp (fp, NULL, NULL); - - _IO_un_link ((struct _IO_FILE_plus *) fp); - fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS; - fp->_fileno = -1; - fp->_old_offset = _IO_pos_BAD; - - return close_status ? close_status : write_status; -} - -void -attribute_compat_text_section -_IO_old_file_finish (_IO_FILE *fp, int dummy) -{ - if (_IO_file_is_open (fp)) - { - _IO_old_do_flush (fp); - if (!(fp->_flags & _IO_DELETE_DONT_CLOSE)) - _IO_SYSCLOSE (fp); - } - _IO_default_finish (fp, 0); -} - -_IO_FILE * -attribute_compat_text_section -_IO_old_file_fopen (_IO_FILE *fp, const char *filename, 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: - __set_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 && errno != ESPIPE) - return NULL; - _IO_link_in ((struct _IO_FILE_plus *) fp); - return fp; -} - -_IO_FILE * -attribute_compat_text_section -_IO_old_file_attach (_IO_FILE *fp, 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; - /* Get the current position of the file. */ - /* We have to do that since that may be junk. */ - fp->_old_offset = _IO_pos_BAD; - if (_IO_SEEKOFF (fp, (_IO_off_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT) - == _IO_pos_BAD && errno != ESPIPE) - return NULL; - return fp; -} - -_IO_FILE * -attribute_compat_text_section -_IO_old_file_setbuf (_IO_FILE *fp, char *p, _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; -} - -static int old_do_write (_IO_FILE *, const char *, _IO_size_t); - -/* Write TO_DO bytes from DATA to FP. - Then mark FP as having empty buffers. */ - -int -attribute_compat_text_section -_IO_old_do_write (_IO_FILE *fp, const char *data, _IO_size_t to_do) -{ - return (to_do == 0 || (_IO_size_t) old_do_write (fp, data, to_do) == to_do) - ? 0 : EOF; -} - -static int -attribute_compat_text_section -old_do_write (_IO_FILE *fp, const char *data, _IO_size_t to_do) -{ - _IO_size_t count; - 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 - not needed nor desirable for Unix- or Posix-like systems. - Instead, just indicate that offset (before and after) is - unpredictable. */ - fp->_old_offset = _IO_pos_BAD; - else if (fp->_IO_read_end != fp->_IO_write_base) - { - _IO_off_t new_pos - = _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1); - if (new_pos == _IO_pos_BAD) - return 0; - fp->_old_offset = new_pos; - } - count = _IO_SYSWRITE (fp, data, to_do); - if (fp->_cur_column && count) - fp->_cur_column = _IO_adjust_column (fp->_cur_column - 1, data, count) + 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; -} - -int -attribute_compat_text_section -_IO_old_file_underflow (_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) - { - fp->_flags |= _IO_ERR_SEEN; - __set_errno (EBADF); - return EOF; - } - if (fp->_IO_read_ptr < fp->_IO_read_end) - return *(unsigned char *) fp->_IO_read_ptr; - - if (fp->_IO_buf_base == NULL) - { - /* Maybe we already have a push back pointer. */ - if (fp->_IO_save_base != NULL) - { - free (fp->_IO_save_base); - fp->_flags &= ~_IO_IN_BACKUP; - } - _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); - - /* This is very tricky. We have to adjust those - pointers before we call _IO_SYSREAD () since - we may longjump () out while waiting for - input. Those pointers may be screwed up. H.J. */ - fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; - fp->_IO_read_end = fp->_IO_buf_base; - fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end - = fp->_IO_buf_base; - - 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_end += count; - if (count == 0) - return EOF; - if (fp->_old_offset != _IO_pos_BAD) - _IO_pos_adjust (fp->_old_offset, count); - return *(unsigned char *) fp->_IO_read_ptr; -} - -int -attribute_compat_text_section -_IO_old_file_overflow (_IO_FILE *f, int ch) -{ - if (f->_flags & _IO_NO_WRITES) /* SET ERROR */ - { - f->_flags |= _IO_ERR_SEEN; - __set_errno (EBADF); - 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_old_do_flush (f); - if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */ - if (_IO_old_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_old_do_flush (f) == EOF) - return EOF; - return (unsigned char) ch; -} - -int -attribute_compat_text_section -_IO_old_file_sync (_IO_FILE *fp) -{ - _IO_ssize_t delta; - int retval = 0; - - /* char* ptr = cur_ptr(); */ - if (fp->_IO_write_ptr > fp->_IO_write_base) - if (_IO_old_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 - retval = EOF; - } - if (retval != EOF) - fp->_old_offset = _IO_pos_BAD; - /* FIXME: Cleanup - can this be shared? */ - /* setg(base(), ptr, ptr); */ - return retval; -} - -_IO_off64_t -attribute_compat_text_section -_IO_old_file_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode) -{ - _IO_off_t result; - _IO_off64_t delta, new_offset; - long count; - /* POSIX.1 8.2.3.7 says that after a call the fflush() the file - offset of the underlying file must be exact. */ - int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end - && fp->_IO_write_base == fp->_IO_write_ptr); - - 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 pptr. 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-mapped 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) - { - /* It could be that we already have a pushback buffer. */ - if (fp->_IO_read_base != NULL) - { - free (fp->_IO_read_base); - fp->_flags &= ~_IO_IN_BACKUP; - } - _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->_old_offset == _IO_pos_BAD) - goto dumb; - /* Make offset absolute, assuming current pointer is file_ptr(). */ - offset += fp->_old_offset; - - dir = _IO_seek_set; - break; - case _IO_seek_set: - break; - case _IO_seek_end: - { - struct stat64 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 we are only interested in the current position we've found it now. */ - if (mode == 0) - return offset; - - /* If destination is within current buffer, optimize: */ - if (fp->_old_offset != _IO_pos_BAD && fp->_IO_read_base != NULL - && !_IO_in_backup (fp)) - { - /* Offset relative to start of main get area. */ - _IO_off_t rel_offset = (offset - fp->_old_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); - { - _IO_mask_flags (fp, 0, _IO_EOF_SEEN); - goto resync; - } - } -#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; - _IO_mask_flags (fp, 0, _IO_EOF_SEEN); - goto resync; - } -#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); - _IO_mask_flags (fp, 0, _IO_EOF_SEEN); - goto resync; - } -#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, - (must_be_exact - ? delta : 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->_old_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->_old_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; - -resync: - /* We need to do it since it is possible that the file offset in - the kernel may be changed behind our back. It may happen when - we fopen a file and then do a fork. One process may access the - file and the kernel file offset will be changed. */ - if (fp->_old_offset >= 0) - _IO_SYSSEEK (fp, fp->_old_offset, 0); - - return offset; -} - -_IO_ssize_t -attribute_compat_text_section -_IO_old_file_write (_IO_FILE *f, const void *data, _IO_ssize_t n) -{ - _IO_ssize_t to_do = n; - while (to_do > 0) - { - _IO_ssize_t count = write (f->_fileno, data, to_do); - if (count == EOF) - { - f->_flags |= _IO_ERR_SEEN; - break; - } - to_do -= count; - data = (void *) ((char *) data + count); - } - n -= to_do; - if (f->_old_offset >= 0) - f->_old_offset += n; - return n; -} - -_IO_size_t -attribute_compat_text_section -_IO_old_file_xsputn (_IO_FILE *f, const void *data, _IO_size_t n) -{ - const char *s = (char *) data; - _IO_size_t to_do = n; - int must_flush = 0; - _IO_size_t count = 0; - - 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. */ - if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING)) - { - count = f->_IO_buf_end - f->_IO_write_ptr; - if (count >= n) - { - const char *p; - for (p = s + n; p > s; ) - { - if (*--p == '\n') - { - count = p - s + 1; - must_flush = 1; - break; - } - } - } - } - else if (f->_IO_write_end > f->_IO_write_ptr) - count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */ - - /* Then fill the buffer. */ - if (count > 0) - { - if (count > to_do) - count = to_do; - 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 - { - char *p = f->_IO_write_ptr; - int i = (int) count; - while (--i >= 0) - *p++ = *s++; - f->_IO_write_ptr = p; - } - to_do -= count; - } - if (to_do + must_flush > 0) - { - _IO_size_t block_size, do_write; - /* Next flush the (full) buffer. */ - if (__overflow (f, EOF) == EOF) - return to_do == 0 ? EOF : 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; - do_write = to_do - (block_size >= 128 ? to_do % block_size : 0); - - if (do_write) - { - count = old_do_write (f, s, do_write); - to_do -= count; - if (count < do_write) - return n - to_do; - } - - /* 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 (to_do) - to_do -= _IO_default_xsputn (f, s+do_write, to_do); - } - return n - to_do; -} - - -const struct _IO_jump_t _IO_old_file_jumps libio_vtable = -{ - JUMP_INIT_DUMMY, - JUMP_INIT(finish, _IO_old_file_finish), - JUMP_INIT(overflow, _IO_old_file_overflow), - JUMP_INIT(underflow, _IO_old_file_underflow), - JUMP_INIT(uflow, _IO_default_uflow), - JUMP_INIT(pbackfail, _IO_default_pbackfail), - JUMP_INIT(xsputn, _IO_old_file_xsputn), - JUMP_INIT(xsgetn, _IO_default_xsgetn), - JUMP_INIT(seekoff, _IO_old_file_seekoff), - JUMP_INIT(seekpos, _IO_default_seekpos), - JUMP_INIT(setbuf, _IO_old_file_setbuf), - JUMP_INIT(sync, _IO_old_file_sync), - JUMP_INIT(doallocate, _IO_file_doallocate), - JUMP_INIT(read, _IO_file_read), - JUMP_INIT(write, _IO_old_file_write), - JUMP_INIT(seek, _IO_file_seek), - JUMP_INIT(close, _IO_file_close), - JUMP_INIT(stat, _IO_file_stat) -}; - -compat_symbol (libc, _IO_old_do_write, _IO_do_write, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_attach, _IO_file_attach, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_close_it, _IO_file_close_it, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_finish, _IO_file_finish, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_fopen, _IO_file_fopen, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_init, _IO_file_init, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_setbuf, _IO_file_setbuf, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_sync, _IO_file_sync, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_overflow, _IO_file_overflow, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_seekoff, _IO_file_seekoff, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_underflow, _IO_file_underflow, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_write, _IO_file_write, GLIBC_2_0); -compat_symbol (libc, _IO_old_file_xsputn, _IO_file_xsputn, GLIBC_2_0); - -#endif |