glibc/libio/genops.c
Roland McGrath 19bc17a905 Thu Mar 28 03:25:10 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
* intl/Makefile (copysrc): Add missing > in sed cmd.

Sat Mar 23 17:52:49 1996  Ulrich Drepper  <drepper@gnu.ai.mit.edu>

	* Makeconfig: Rename Makefile variable nlsdir to i18ndir and
	change value to $(datadir)/i18n.  `nls' is not an appropriate
	name.

	* Makefile (subdirs): Add new subdir wctype.

	* ctype/ctype-info.c: Add new global variable __ctype_names
	and initialize from _nl_C_LC_CTYPE.

	* ctype/ctype.h: In P1003.3b/D11 `alnum' is a separate character
        class.  Use bit 11.
	[_ISbit]: Protect definition of bitmasks because they are also
	used in wctype.h.

	* libio/genops.c (_IO_sputbackc, _IO_sungetc): Clear EOF flag
	after successfully pushing back a character.

	Fundamental changes in locale implementation.  Almost nothing
	from the old code is used anymore.
	* locale/charmap.c, locale/collate.c, locale/config.h,
 	locale/ctypedump.c, locale/hash.h, locale/keyword.gperf,
 	locale/keyword.h, locale/loadlocale.c, locale/locale-ctype.c,
 	locale/locale.c locale/localeconv.c, locale/localedef.c,
 	locale/localedef.h, locale/locfile-hash.c, locale/locfile-lex.c,
 	locale/locfile-parse.c, locale/messages.c, locale/monetary.c,
 	locale/numeric.c, locale/setlocale.c, locale/token.h,
 	locale/xmalloc.c: Removed.

	* locale/Makefile: Update for new locale implementation with
	program source code distributed in subdir.

	* locale/categories.def, locale/iso-4217.def: Updated file
        for new locale implementation.

	* locale/langinfo.h: Updated for new locale implementation.
	(ERA_D_T_FMT, ERA_T_FMT): New official values according to
	P1003.2b/D11.
	(_NL_COLLATE_NRULES, _NL_COLLATE_RULES, _NL_COLLATE_HASH_SIZE,
	_NL_COLLATE_HASH_LAYERS, _NL_COLLATE_TABLE_EB,
	_NL_COLLATE_TABLE_EL, _NL_COLLATE_UNDEFINED, _NL_COLLATE_EXTRA_EB,
	_NL_COLLATE_EXTRA_EL, _NL_CTYPE_NAMES_EB, _NL_CTYPE_NAMES_EL,
	_NL_CTYPE_HASH_SIZE, _NL_CTYPE_HASH_LAYERS, _NL_CTYPE_CLASS_NAMES,
	_NL_CTYPE_MAP_NAMES, _NL_CTYPE_WIDTH): New internal values for
	extended LC_CTYPE and LC_COLLATE implementation.

	* locale/simple-hash.c, locale/simple-hash.h, locale/xmalloc.c,
 	locale/xstrdup.c: Helper functions for locale related programs.

	* locale/C-collate.c, locale/C-ctype.c,
        locale/C-messages.c, locale/C-monetary.c,
        locale/C-numeric.c, locale/C-time.c,
        locale/lc-collate.c, locale/lc-ctype.c,
        locale/lc-messages.c, locale/lc-monetary.c,
        locale/lc-numeric.c, locale/lc-time.c: New implementation of locale
        functions, and new generated "C" locale data.

	* locale/loadlocale.c: Now handles word fields in locale binary
        automatically by changing the endianess if necessary.

	* locale/localeinfo.h (LIMAGIC): Changed magic number because
	of incompatible changes.
	(locale_data): Changed definition to allow word as a value type.
	(coll_sort_rule): Values for collation sorting mode.
	(_NL_CURRENT_WORD): New macro to access word value of locale entry.
	(__collate_table, __collate_extra): Declare new global variables
	for collation tables.

	* locale/programs/charmap-kw.gperf, locale/programs/charmap-kw.h,
        locale/programs/charmap.c, locale/programs/charset.c,
        locale/programs/charset.h, locale/programs/config.h,
        locale/programs/ctypedump.c, locale/programs/ld-collate.c,
        locale/programs/ld-ctype.c, locale/programs/ld-messages.c,
        locale/programs/ld-monetary.c, locale/programs/ld-numeric.c,
        locale/programs/ld-time.c, locale/programs/linereader.c,
        locale/programs/linereader.h, locale/programs/locale.c,
        locale/programs/localedef.c, locale/programs/locales.h,
        locale/programs/locfile-kw.gperf, locale/programs/locfile-kw.h,
        locale/programs/locfile-token.h, locale/programs/locfile.c,
        locale/programs/locfile.h, locale/programs/stringtrans.c,
        locale/programs/stringtrans.h: Implementation of locale related
        programs.

	* locale/weight.h: Functions to access collation tables.

	* posix/unistd.h: Define _POSIX2_LOCALEDEF.

	* stdio-common/printf_fp.c: Fix bug with printing certain numbers
	< 10^-1.  Reported by Bill Metzenthen.

	* stdio-common/tfformat.c: Add new test for above bug.

	* string/strcoll.c, string/strxfrm.c: Real implementation of
        string collation according to ISO C.

	* wctype/Makefile, wctype/cname-lookup.h, wctype/iswctype.c,
        wctype/test_wctype.c, wctype/towctrans.c, wctype/wcfuncs.c,
        wctype/wctrans.c, wctype/wctype.c, wctype/wctype.h: New files.
        Implementation of wide character classes and mapping.
1996-03-28 08:30:38 +00:00

853 lines
20 KiB
C

/*
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. */
/* Generic or default I/O operations. */
#include "libioP.h"
#ifdef __STDC__
#include <stdlib.h>
#endif
#include <string.h>
void
DEFUN(_IO_un_link, (fp),
_IO_FILE *fp)
{
if (fp->_flags & _IO_LINKED) {
_IO_FILE **f;
for (f = &_IO_list_all; *f != NULL; f = &(*f)->_chain) {
if (*f == fp) {
*f = fp->_chain;
break;
}
}
fp->_flags &= ~_IO_LINKED;
}
}
void
DEFUN(_IO_link_in, (fp),
_IO_FILE *fp)
{
if ((fp->_flags & _IO_LINKED) == 0) {
fp->_flags |= _IO_LINKED;
fp->_chain = _IO_list_all;
_IO_list_all = fp;
}
}
/* Return minimum _pos markers
Assumes the current get area is the main get area. */
_IO_size_t
DEFUN(_IO_least_marker, (fp),
register _IO_FILE *fp)
{
_IO_ssize_t least_so_far = fp->_IO_read_end - fp->_IO_read_base;
register 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
DEFUN(_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;
fp->_IO_read_ptr = fp->_IO_read_base;
}
/* Switch current get area from main get area to (end of) backup area. */
void
DEFUN(_IO_switch_to_backup_area, (fp),
register _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 _gbase and _IO_save_base. */
tmp = fp->_IO_read_base; fp->_IO_read_base = fp->_IO_save_base; fp->_IO_save_base = tmp;
fp->_IO_read_ptr = fp->_IO_read_end;
}
int
DEFUN(_IO_switch_to_get_mode, (fp),
register _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
DEFUN(_IO_free_backup_area, (fp),
register _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
DEFUN(_IO_switch_to_put_mode, (fp),
register _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
DEFUN(__overflow, (f, ch),
_IO_FILE *f AND int ch)
{
return _IO_OVERFLOW (f, ch);
}
static int
DEFUN(save_for_backup, (fp),
_IO_FILE *fp)
{
/* Append [_IO_read_base.._IO_read_end] to backup area. */
int least_mark = _IO_least_marker(fp);
/* needed_size is how much space we need in the backup area. */
int needed_size = (fp->_IO_read_end - fp->_IO_read_base) - least_mark;
int current_Bsize = fp->_IO_save_end - fp->_IO_save_base;
int avail; /* Extra space available for future expansion. */
int 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)
{
memcpy(new_buffer + avail,
fp->_IO_save_end + least_mark,
-least_mark);
memcpy(new_buffer +avail - least_mark,
fp->_IO_read_base,
fp->_IO_read_end - fp->_IO_read_base);
}
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,
fp->_IO_read_end - fp->_IO_read_base);
}
else if (needed_size > 0)
memcpy(fp->_IO_save_base + avail,
fp->_IO_read_base + least_mark,
needed_size);
}
/* FIXME: Dubious arithmetic if pointers are NULL */
fp->_IO_backup_base = fp->_IO_save_base + avail;
/* Adjust all the streammarkers. */
delta = fp->_IO_read_end - fp->_IO_read_base;
for (mark = fp->_markers; mark != NULL; mark = mark->_next)
mark->_pos -= delta;
return 0;
}
int
DEFUN(__underflow, (fp),
_IO_FILE *fp)
{
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 *fp->_IO_read_ptr;
}
if (_IO_have_markers(fp))
{
if (save_for_backup (fp))
return EOF;
}
else if (_IO_have_backup(fp))
_IO_free_backup_area(fp);
return _IO_UNDERFLOW (fp);
}
int
DEFUN(__uflow, (fp),
_IO_FILE *fp)
{
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 *fp->_IO_read_ptr++;
}
if (_IO_have_markers(fp))
{
if (save_for_backup (fp))
return EOF;
}
else if (_IO_have_backup(fp))
_IO_free_backup_area(fp);
return _IO_UFLOW (fp);
}
void
DEFUN(_IO_setb, (f, b, eb, a),
_IO_FILE *f AND char *b AND char *eb AND int a)
{
if (f->_IO_buf_base && !(f->_flags & _IO_USER_BUF))
FREE_BUF(f->_IO_buf_base);
f->_IO_buf_base = b;
f->_IO_buf_end = eb;
if (a)
f->_flags &= ~_IO_USER_BUF;
else
f->_flags |= _IO_USER_BUF;
}
void
DEFUN(_IO_doallocbuf, (fp),
register _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
DEFUN(_IO_default_underflow, (fp),
_IO_FILE *fp)
{
return EOF;
}
int
DEFUN(_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
DEFUN(_IO_default_xsputn, (f, data, n),
register _IO_FILE *f AND const void *data AND _IO_size_t n)
{
register const char *s = (char*) data;
register _IO_size_t more = n;
if (more <= 0)
return 0;
for (;;)
{
_IO_ssize_t count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */
if (count > 0)
{
if (count > more)
count = more;
if (count > 20)
{
memcpy(f->_IO_write_ptr, s, count);
s += count;
f->_IO_write_ptr += count;
}
else if (count <= 0)
count = 0;
else
{
register char *p = f->_IO_write_ptr;
register _IO_ssize_t i;
for (i = count; --i >= 0; ) *p++ = *s++;
f->_IO_write_ptr = p;
}
more -= count;
}
if (more == 0 || __overflow(f, (unsigned char)*s++) == EOF)
break;
more--;
}
return n - more;
}
_IO_size_t
DEFUN(_IO_sgetn, (fp, data, n),
_IO_FILE *fp AND void *data AND _IO_size_t n)
{
/* FIXME handle putback buffer here! */
return _IO_XSGETN (fp, data, n);
}
_IO_size_t
DEFUN(_IO_default_xsgetn, (fp, data, n),
_IO_FILE *fp AND void *data AND _IO_size_t n)
{
register _IO_size_t more = n;
register char *s = (char*) 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 (more == 0 || __underflow(fp) == EOF)
break;
}
return n - more;
}
int
DEFUN(_IO_sync, (fp),
register _IO_FILE *fp)
{
return 0;
}
_IO_FILE*
DEFUN(_IO_default_setbuf, (fp, p, len),
register _IO_FILE *fp AND char* p AND _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_pos_t
DEFUN(_IO_default_seekpos, (fp, pos, mode),
_IO_FILE *fp AND _IO_pos_t pos AND int mode)
{
return _IO_SEEKOFF (fp, _IO_pos_as_off(pos), 0, mode);
}
int
DEFUN(_IO_default_doallocate, (fp),
_IO_FILE *fp)
{
char *buf = ALLOC_BUF(_IO_BUFSIZ);
if (buf == NULL)
return EOF;
_IO_setb(fp, buf, buf+_IO_BUFSIZ, 1);
return 1;
}
void
DEFUN(_IO_init, (fp, flags),
register _IO_FILE *fp AND int flags)
{
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;
}
int
DEFUN(_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
DEFUN(_IO_default_finish, (fp),
_IO_FILE *fp)
{
struct _IO_marker *mark;
if (fp->_IO_buf_base && !(fp->_flags & _IO_USER_BUF))
{
FREE_BUF(fp->_IO_buf_base);
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;
}
_IO_un_link(fp);
}
_IO_pos_t
DEFUN(_IO_default_seekoff, (fp, offset, dir, mode),
register _IO_FILE *fp AND _IO_off_t offset AND int dir AND int mode)
{
return _IO_pos_BAD;
}
int
DEFUN(_IO_sputbackc, (fp, c),
register _IO_FILE *fp AND 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
DEFUN(_IO_sungetc, (fp),
register _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 */
void
DEFUN(_IO_set_column, (fp, c),
register _IO_FILE *fp AND int c)
{
if (c == -1)
fp->_column = -1;
else
fp->_column = c - (fp->_IO_write_ptr - fp->_IO_write_base);
}
#else
int
DEFUN(_IO_set_column, (fp, i),
register _IO_FILE *fp AND int i)
{
fp->_cur_column = i+1;
return 0;
}
#endif
unsigned
DEFUN(_IO_adjust_column, (start, line, count),
unsigned start AND const char *line AND int count)
{
register const char *ptr = line + count;
while (ptr > line)
if (*--ptr == '\n')
return line + count - ptr - 1;
return start + count;
}
int
DEFUN(_IO_get_column, (fp),
register _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;
}
int
DEFUN_VOID(_IO_flush_all)
{
int result = 0;
_IO_FILE *fp;
for (fp = _IO_list_all; fp != NULL; fp = fp->_chain)
if (fp->_IO_write_ptr > fp->_IO_write_base
&& _IO_OVERFLOW (fp, EOF) == EOF)
result = EOF;
return result;
}
void
DEFUN_VOID(_IO_flush_all_linebuffered)
{
_IO_FILE *fp;
for (fp = _IO_list_all; fp != NULL; fp = fp->_chain)
if (fp->_flags & _IO_LINE_BUF)
_IO_OVERFLOW (fp, EOF);
}
void
DEFUN_VOID(_IO_unbuffer_all)
{
_IO_FILE *fp;
for (fp = _IO_list_all; fp != NULL; fp = fp->_chain)
if (! (fp->_flags & _IO_UNBUFFERED))
_IO_SETBUF (fp, NULL, 0);
}
void
DEFUN_VOID(_IO_cleanup)
{
_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 destructord 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_all ();
}
void
DEFUN(_IO_init_marker, (marker, fp),
struct _IO_marker *marker AND _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
DEFUN(_IO_remove_marker, (marker),
register struct _IO_marker *marker)
{
/* Unlink from sb's chain. */
register 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
DEFUN(_IO_marker_difference, (mark1, mark2),
struct _IO_marker *mark1 AND struct _IO_marker *mark2)
{
return mark1->_pos - mark2->_pos;
}
/* Return difference between MARK and current posistion of MARK's stream. */
int
DEFUN(_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
DEFUN(_IO_seekmark, (fp, mark, delta),
_IO_FILE *fp AND struct _IO_marker *mark AND 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
DEFUN(_IO_unsave_markers, (fp),
register _IO_FILE *fp)
{
register 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);
}
int
DEFUN(_IO_nobackup_pbackfail, (fp, c),
register _IO_FILE *fp AND 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;
}
int
DEFUN(_IO_default_pbackfail, (fp, c),
register _IO_FILE *fp AND int c)
{
if (fp->_IO_read_ptr <= fp->_IO_read_base)
{
/* Need to handle a filebuf in write mode (switch to read mode). FIXME!*/
if (_IO_have_backup(fp) && !_IO_in_backup(fp))
_IO_switch_to_backup_area(fp);
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;
_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--;
if (c != EOF && *fp->_IO_read_ptr != c)
*fp->_IO_read_ptr = c;
return (unsigned char)*fp->_IO_read_ptr;
}
_IO_pos_t
DEFUN(_IO_default_seek, (fp, offset, dir),
_IO_FILE *fp AND _IO_off_t offset AND int dir)
{
return _IO_pos_BAD;
}
int
DEFUN(_IO_default_stat, (fp, st),
_IO_FILE *fp AND void* st)
{
return EOF;
}
_IO_ssize_t
DEFUN(_IO_default_read, (fp, data, n),
register _IO_FILE* fp AND void* data AND _IO_ssize_t n)
{
return -1;
}
_IO_ssize_t
DEFUN(_IO_default_write, (fp, data, n),
register _IO_FILE* fp AND const void* data AND _IO_ssize_t n)
{
return 0;
}
#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 */