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authorUlrich Drepper <drepper@redhat.com>1999-06-16 22:55:47 +0000
committerUlrich Drepper <drepper@redhat.com>1999-06-16 22:55:47 +0000
commitd64b6ad07585b8a37e5fecc9a47fcee766d52ede (patch)
tree076b36cc9c1b82254348212e75939d842885563a /libio/wgenops.c
parentbc938d3de936a8e429b16237180c046139be8247 (diff)
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Update.
* Versions.def: Add GLIBC_2.2 for libc. * iconv/gconv.h: Make header suitable for inclusion in public header by protecting all names with __. * iconv/gconv.c: Adapt for symbol name changes. * iconv/gconv.h: Likewise. * iconv/gconv_builtin.c: Likewise. * iconv/gconv_close.c: Likewise. * iconv/gconv_db.c: Likewise. * iconv/gconv_dl.c: Likewise. * iconv/gconv_int.h: Likewise. * iconv/gconv_open.c: Likewise. * iconv/gconv_simple.c: Likewise. * iconv/iconv.c: Likewise. * iconv/iconv_close.c: Likewise. * iconv/iconv_open.c: Likewise. * iconv/loop.c: Likewise. * iconv/skeleton.c: Likewise. * iconvdata/8bit-gap.c: Likewise. * iconvdata/8bit-generic.c: Likewise. * iconvdata/ansi_x3.110.c: Likewise. * iconvdata/big5.c: Likewise. * iconvdata/cns11643.h: Likewise. * iconvdata/cns11643l1.h: Likewise. * iconvdata/euc-cn.c: Likewise. * iconvdata/euc-jp.c: Likewise. * iconvdata/euc-kr.c: Likewise. * iconvdata/euc-tw.c: Likewise. * iconvdata/gb2312.h: Likewise. * iconvdata/iso-2022-jp.c: Likewise. * iconvdata/iso-2022-kr.c: Likewise. * iconvdata/iso646.c: Likewise. * iconvdata/iso8859-1.c: Likewise. * iconvdata/iso_6937-2.c: Likewise. * iconvdata/iso_6937.c: Likewise. * iconvdata/jis0201.h: Likewise. * iconvdata/jis0208.h: Likewise. * iconvdata/jis0212.h: Likewise. * iconvdata/johab.c: Likewise. * iconvdata/ksc5601.h: Likewise. * iconvdata/sjis.c: Likewise. * iconvdata/t.61.c: Likewise. * iconvdata/uhc.c: Likewise. * stdlib/mblen.c: Likewise. * stdlib/mbtowc.c: Likewise. * stdlib/wctomb.c: Likewise. * wcsmbs/btowc.c: Likewise. * wcsmbs/mbrtowc.c: Likewise. * wcsmbs/mbsnrtowcs.c: Likewise. * wcsmbs/mbsrtowcs.c: Likewise. * wcsmbs/wchar.h: Likewise. * wcsmbs/wcrtomb.c: Likewise. * wcsmbs/wcsmbsload.c: Likewise. * wcsmbs/wcsmbsload.h: Likewise. * wcsmbs/wcsnrtombs.c: Likewise. * wcsmbs/wcsrtombs.c: Likewise. * wcsmbs/wctob.c: Likewise. * include/limits.h (MB_LEN_MAX): Increase to 16. * sysdeps/generic/_G_config.h: Define _G_fpos_t as struct. Define _G_iconv_t. * sysdeps/unix/sysv/linux/_G_config.h: Likewise. * include/wchar.h: Change mbstate_t to __mbstate_t. * libio/Makefile (routines): Add wfiledoalloc, oldiofgetpos, oldiofgetpos64, oldiofsetpos, oldiofsetpos64, fputwc, fputwc_u, getwc, getwc_u, getwchar, getwchar_u, iofgetws, iofgetws_u, iofputws, iofputws_u, iogetwline, iowpadn, ioungetwc, putwc, putwc_u, putchar, putchar_u, swprintf, vwprintf, wprintf, wscanf, fwscanf, vwscanf, vswprintf, iovswscanf, swscanf, wgenops, wstrops, wfileops, and iofwide. (tests): Add tst_swprintf, tst_wprintf, tst_swscanf, and tst_wscanf. * libio/Versions: Add _IO_fgetpos, _IO_fgetpos64, _IO_fsetpos, _IO_fsetpos64, fgetpos, fgetpos64, fgetwc, fgetwc_unlocked, fgetws, fgetws_unlocked, fputwc, fputwc_unlocked, fputws, fputws_unlocked, fsetpos, fsetpos64, fwide, fwprintf, fwscanf, getwc, getwc_unlocked, getwchar, getwchar_unlocked, putwc, putwc_unlocked, putwchar, putwchar_unlocked, swprintf, swscanf, ungetwc, vfwprintf, vswprintf, vwprintf, vfwscanf, vswscanf, vwscanf, wprintf, and wscanf to GLIBC_2.2 for libc. * libio/libio.h: Define codecvt struct. Define _IO_wide_data. Extend _IO_file contain pointer to codecvt, widedata and mode. (_IO_getwc_unlocked): New macro. (_IO_putwc_unlocked): New macro. (_IO_fwide): New macro. * libio/libioP.h: Add new prototypes and adjust existing declarations. * libio/fileops.c (_IO_new_file_close_it): Reset normal or widedata buffers based on mode. (new_do_write): Set _IO_write_end to _IO_buf_end if stream is wide oriented. (_IO_new_file_overflow): Don't depend only on _IO_CURRENTLY_PUTTING flag to be enough to signal unallocated buffer. For wide oriented stream don't make it linebuffered. Don't use _IO_do_flush, use _IO_new_do_write directly. (_IO_new_file_seekoff): Change return value type to _IO_off64_t. (_IO_file_seek): Likewise. * libio/genops.c (_IO_least_marker): Make global. (__underflow): Orient stream if not already done. (__uflow): Likewise. (_IO_default_seekpos): Change to type _IO_off64_t. (_IO_default_seekoff): Likewise. (_IO_default_seek): Likewise. (_IO_no_init): New function. Similar to _IO_init but allows to orient in initialization. * libio/iolibio.h: Add prototype for _IO_vswprintf. Change _IO_pos_BAD to use _IO_off64_t. * libio/ftello.c: Use _IO_off_t. For now abort when use with wide char stream. * libio/ftello64.c: Likewise. * libio/ioftell.c: Likewise. * libio/iofopncook.c: Likewise. * libio/ioseekoff.c: Likewise. * libio/ioseekpos.c: Likewise. * libio/oldfileops.c: Likewise. * libio/iofgetpos.c: Store state of conversion if necessary. * libio/iofgetpos64.c: Likewise. * libio/iofsetpos.c: Restore conversion state if necessary. * libio/iofsetpos64.c: Likewise. * libio/iofdopen.c: Initialize so that stream can be wide oriented. * libio/iofopen.c: Likewise. * libio/iofopen64.c: Likewise. * libio/iopopen.c: Likewise. * libio/iovdprintf.c: Likewise. * libio/iovsprintf.c: Likewise. * libio/iovsscanf.c: Likewise. * libio/memstream.c: Likewise. * libio/obprintf.c: Likewise. * libio/iofputs.c: Orient stream if not already happened. * libio/iofputs_u.c: Likewise. * libio/iofwrite.c: Likewise. * libio/iofwrite_u.c: Likewise. * libio/ioputs.c: Likewise. * libio/iosetbuffer.c: Handle not yet oriented stream. * libio/iosetvbuf.c: Likewise. * libio/oldstdfiles.c: Adjust FILEBUF_LITERAL call. * libio/stdfiles.c: Likewise. * libio/strops.c (_IO_str_overflow): Correctly free buffer after failed allocation. (_IO_str_seekoff): Use _IO_off64_t. * libio/vasprintf.c: Pre-orient stream. * libio/vsnprintf.c: Likewise. * libio/fputwc.c: New file. * libio/fputwc_u.c: New file. * libio/fwprintf.c: New file. * libio/fwscanf.c: New file. * libio/getwc.c: New file. * libio/getwc_u.c: New file. * libio/getwchar.c: New file. * libio/getwchar_u.c: New file. * libio/iofgetws.c: New file. * libio/iofgetws_u.c: New file. * libio/iofputws.c: New file. * libio/iofputws_u.c: New file. * libio/iofwide.c: New file. * libio/iogetwline.c: New file. * libio/ioungetwc.c: New file. * libio/iovswscanf.c: New file. * libio/iowpadn.c: New file. * libio/oldiofgetpos.c: New file. * libio/oldiofgetpos64.c: New file. * libio/oldiofsetpos.c: New file. * libio/oldiofsetpos64.c: New file. * libio/putwc.c: New file. * libio/putwc_u.c: New file. * libio/putwchar.c: New file. * libio/putwchar_u.c: New file. * libio/swprintf.c: New file. * libio/swscanf.c: New file. * libio/tst_swprintf.c: New file. * libio/tst_swscanf.c: New file. * libio/tst_wprintf.c: New file. * libio/tst_wscanf.c: New file. * libio/tst_wscanf.input: New file. * libio/vswprintf.c: New file. * libio/vwprintf.c: New file. * libio/vwscanf.c: New file. * libio/wfiledoalloc.c: New file. * libio/wfileops.c: New file. * libio/wgenops.c: New file. * libio/wprintf.c: New file. * libio/wscanf.c: New file. * libio/wstrops.c: New file. * stdio-common/Makefile (routines): Add _itowa, itowa-digits, vfwprintf, and vfwscanf. * stdio-common/_itoa.c (base_table): Rename to _IO_base_table and make global. * stdio-common/_itowa.c: New file. * stdio-common/_itowa.h: New file. * stdio-common/itoa-digits.c: Minimal optimization. * stdio-common/itowa-digits.c: New file. * stdio-common/printf-parse.h: Allow use in wide character context. * stdio-common/printf-prs.c: Define ISASCII and MBRLEN. * stdio-common/printf.h (printf_info): Add wide bit. * stdio-common/printf_fp.c: Determine from wide bit whether stream is wide oriented or not. * stdio-common/printf_size.c: Likewise. * sysdeps/generic/printf_fphex.c: Likewise. * stdlib/strfmon.c: Call __printf_fp with wide bit cleared. * stdio-common/vfprintf.c: Rewrite to allow use in wide character context. * stdio-common/vfscand.c: Likewise. * stdio-common/vfwprintf.c: New file. * stdio-common/vfwscanf.c: New file. * time/Makefile (routines): Add wcsftime. (tests): Add tst_wcsftime. * time/Versions: Add wcsftime to GLIBC_2.2 for libc. * time/strftime.c: Make usable as wcsftime. * time/wcsftime.c: New file. * time/tst_wcsftime.c: New file. * wcsmbs/Makefile (routines): Add wmempcpy and wcschrnul. * wcsmbs/Versions: Add wmempcpy and wcschrnul to GLIBC_2.2 for libc. * wcsmbs/wcschrnul.c: New file. * wcsmbs/wmemcpy.c: New file. * wcsmbs/wmemcpy.c: Rename to __wmemcpy and make wmemcpy weak alias. * wcsmbs/wmemmove.c: Likewise for wmemmove. * manual/stdio.texi: Document is_char and wide element if printf_info. * manual/time.texi: Document wcsftime. * include/wchar.h: Add prototypes for __wmemcpy, __wmempcpy, __wmemmove, __wcschrnul, and __vfwscanf. * locale/langinfo.h: Add new LC_TIME entries for wchar_t data. * locale/C-time.c: Adapt for above change. * locale/categories.def: Likewise. * locale/localeinfo.h: Likewise. * localedata/Makefile: Don't run tests for now.
Diffstat (limited to 'libio/wgenops.c')
-rw-r--r--libio/wgenops.c747
1 files changed, 747 insertions, 0 deletions
diff --git a/libio/wgenops.c b/libio/wgenops.c
new file mode 100644
index 0000000..496d080
--- /dev/null
+++ b/libio/wgenops.c
@@ -0,0 +1,747 @@
+/* Copyright (C) 1993, 1995, 1997, 1998, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU IO Library.
+ Written by Ulrich Drepper <drepper@cygnus.com>.
+ Based on the single byte version by Per Bothner <bothner@cygnus.com>.
+
+ 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>
+#include <wchar.h>
+
+
+
+static int save_for_wbackup __P ((_IO_FILE *fp, wchar_t *end_p))
+#ifdef _LIBC
+ internal_function
+#endif
+ ;
+
+/* Return minimum _pos markers
+ Assumes the current get area is the main get area. */
+_IO_ssize_t _IO_least_wmarker __P ((_IO_FILE *fp, wchar_t *end_p));
+
+_IO_ssize_t
+_IO_least_wmarker (fp, end_p)
+ _IO_FILE *fp;
+ wchar_t *end_p;
+{
+ _IO_ssize_t least_so_far = end_p - fp->_wide_data->_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_wget_area (fp)
+ _IO_FILE *fp;
+{
+ wchar_t *tmp;
+ fp->_flags &= ~_IO_IN_BACKUP;
+ /* Swap _IO_read_end and _IO_save_end. */
+ tmp = fp->_wide_data->_IO_read_end;
+ fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_save_end;
+ fp->_wide_data->_IO_save_end= tmp;
+ /* Swap _IO_read_base and _IO_save_base. */
+ tmp = fp->_wide_data->_IO_read_base;
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_save_base;
+ fp->_wide_data->_IO_save_base = tmp;
+ /* Set _IO_read_ptr. */
+ fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base;
+}
+
+
+/* Switch current get area from main get area to (end of) backup area. */
+void
+_IO_switch_to_wbackup_area (fp)
+ _IO_FILE *fp;
+{
+ wchar_t *tmp;
+ fp->_flags |= _IO_IN_BACKUP;
+ /* Swap _IO_read_end and _IO_save_end. */
+ tmp = fp->_wide_data->_IO_read_end;
+ fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_save_end;
+ fp->_wide_data->_IO_save_end = tmp;
+ /* Swap _IO_read_base and _IO_save_base. */
+ tmp = fp->_wide_data->_IO_read_base;
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_save_base;
+ fp->_wide_data->_IO_save_base = tmp;
+ /* Set _IO_read_ptr. */
+ fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end;
+}
+
+
+void
+_IO_wsetb (f, b, eb, a)
+ _IO_FILE *f;
+ wchar_t *b;
+ wchar_t *eb;
+ int a;
+{
+ if (f->_wide_data->_IO_buf_base && !(f->_flags & _IO_USER_BUF))
+ FREE_BUF (f->_wide_data->_IO_buf_base, _IO_wblen (f));
+ f->_wide_data->_IO_buf_base = b;
+ f->_wide_data->_IO_buf_end = eb;
+ if (a)
+ f->_flags &= ~_IO_USER_BUF;
+ else
+ f->_flags |= _IO_USER_BUF;
+}
+
+
+wint_t
+_IO_wdefault_pbackfail (fp, c)
+ _IO_FILE *fp;
+ wint_t c;
+{
+ if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base
+ && !_IO_in_backup (fp)
+ && (wint_t) 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->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base
+ && _IO_have_wbackup (fp))
+ {
+ if (save_for_wbackup (fp, fp->_wide_data->_IO_read_ptr))
+ return WEOF;
+ }
+ else if (!_IO_have_wbackup (fp))
+ {
+ /* No backup buffer: allocate one. */
+ /* Use nshort buffer, if unused? (probably not) FIXME */
+ int backup_size = 128;
+ wchar_t *bbuf = (wchar_t *) malloc (backup_size
+ * sizeof (wchar_t));
+ if (bbuf == NULL)
+ return WEOF;
+ fp->_wide_data->_IO_save_base = bbuf;
+ fp->_wide_data->_IO_save_end = (fp->_wide_data->_IO_save_base
+ + backup_size);
+ fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_save_end;
+ }
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr;
+ _IO_switch_to_wbackup_area (fp);
+ }
+ else if (fp->_wide_data->_IO_read_ptr <= fp->_wide_data->_IO_read_base)
+ {
+ /* Increase size of existing backup buffer. */
+ _IO_size_t new_size;
+ _IO_size_t old_size = (fp->_wide_data->_IO_read_end
+ - fp->_wide_data->_IO_read_base);
+ wchar_t *new_buf;
+ new_size = 2 * old_size;
+ new_buf = (wchar_t *) malloc (new_size * sizeof (wchar_t));
+ if (new_buf == NULL)
+ return WEOF;
+ __wmemcpy (new_buf + (new_size - old_size),
+ fp->_wide_data->_IO_read_base, old_size);
+ free (fp->_wide_data->_IO_read_base);
+ _IO_wsetg (fp, new_buf, new_buf + (new_size - old_size),
+ new_buf + new_size);
+ fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_read_ptr;
+ }
+
+ *--fp->_wide_data->_IO_read_ptr = c;
+ }
+ return c;
+}
+
+
+void
+_IO_wdefault_finish (fp, dummy)
+ _IO_FILE *fp;
+ int dummy;
+{
+ struct _IO_marker *mark;
+ if (fp->_wide_data->_IO_buf_base && !(fp->_flags & _IO_USER_BUF))
+ {
+ FREE_BUF (fp->_wide_data->_IO_buf_base,
+ _IO_wblen (fp) * sizeof (wchar_t));
+ fp->_wide_data->_IO_buf_base = fp->_wide_data->_IO_buf_end = NULL;
+ }
+
+ for (mark = fp->_markers; mark != NULL; mark = mark->_next)
+ mark->_sbuf = NULL;
+
+ if (fp->_IO_save_base)
+ {
+ free (fp->_wide_data->_IO_save_base);
+ fp->_IO_save_base = NULL;
+ }
+
+#ifdef _IO_MTSAFE_IO
+ _IO_lock_fini (*fp->_lock);
+#endif
+
+ _IO_un_link (fp);
+}
+
+
+wint_t
+_IO_wdefault_uflow (fp)
+ _IO_FILE *fp;
+{
+ wint_t wch;
+ wch = _IO_UNDERFLOW (fp);
+ if (wch == WEOF)
+ return WEOF;
+ return *fp->_wide_data->_IO_read_ptr++;
+}
+
+
+wint_t
+__woverflow (f, wch)
+ _IO_FILE *f;
+ wint_t wch;
+{
+ if (f->_mode == 0)
+ _IO_fwide (f, 1);
+ return _IO_OVERFLOW (f, wch);
+}
+
+
+wint_t
+__wuflow (fp)
+ _IO_FILE *fp;
+{
+ if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1))
+ return EOF;
+
+ if (fp->_mode == 0)
+ _IO_fwide (fp, 1);
+ if (_IO_in_put_mode (fp))
+ if (_IO_switch_to_get_mode (fp) == EOF)
+ return WEOF;
+ if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
+ return *fp->_wide_data->_IO_read_ptr++;
+ if (_IO_in_backup (fp))
+ {
+ _IO_switch_to_main_wget_area (fp);
+ if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
+ return *fp->_wide_data->_IO_read_ptr++;
+ }
+ if (_IO_have_markers (fp))
+ {
+ if (save_for_wbackup (fp, fp->_wide_data->_IO_read_end))
+ return WEOF;
+ }
+ else if (_IO_have_wbackup (fp))
+ _IO_free_wbackup_area (fp);
+ return _IO_UFLOW (fp);
+}
+
+
+wint_t
+__wunderflow (fp)
+ _IO_FILE *fp;
+{
+ if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1))
+ return EOF;
+
+ if (_IO_in_put_mode (fp))
+ if (_IO_switch_to_wget_mode (fp) == WEOF)
+ return WEOF;
+ if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
+ return *fp->_wide_data->_IO_read_ptr;
+ if (_IO_in_backup (fp))
+ {
+ _IO_switch_to_main_wget_area (fp);
+ if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
+ return *fp->_wide_data->_IO_read_ptr;
+ }
+ if (_IO_have_markers (fp))
+ {
+ if (save_for_wbackup (fp, fp->_wide_data->_IO_read_end))
+ return EOF;
+ }
+ else if (_IO_have_backup (fp))
+ _IO_free_wbackup_area (fp);
+ return _IO_UNDERFLOW (fp);
+}
+
+
+_IO_size_t
+_IO_wdefault_xsputn (f, data, n)
+ _IO_FILE *f;
+ const void *data;
+ _IO_size_t n;
+{
+ const wchar_t *s = (const wchar_t *) data;
+ _IO_size_t more = n;
+ if (more <= 0)
+ return 0;
+ for (;;)
+ {
+ /* Space available. */
+ _IO_ssize_t count = (f->_wide_data->_IO_write_end
+ - f->_wide_data->_IO_write_ptr);
+ if (count > 0)
+ {
+ if ((_IO_size_t) count > more)
+ count = more;
+ if (count > 20)
+ {
+#ifdef _LIBC
+ f->_wide_data->_IO_write_ptr =
+ __wmempcpy (f->_wide_data->_IO_write_ptr, s, count);
+#else
+ memcpy (f->_wide_data->_IO_write_ptr, s, count);
+ f->_wide_data->_IO_write_ptr += count;
+#endif
+ s += count;
+ }
+ else if (count <= 0)
+ count = 0;
+ else
+ {
+ wchar_t *p = f->_wide_data->_IO_write_ptr;
+ _IO_ssize_t i;
+ for (i = count; --i >= 0; )
+ *p++ = *s++;
+ f->_wide_data->_IO_write_ptr = p;
+ }
+ more -= count;
+ }
+ if (more == 0 || __woverflow (f, *s++) == WEOF)
+ break;
+ more--;
+ }
+ return n - more;
+}
+
+
+_IO_size_t
+_IO_wdefault_xsgetn (fp, data, n)
+ _IO_FILE *fp;
+ void *data;
+ _IO_size_t n;
+{
+ _IO_size_t more = n;
+ wchar_t *s = (wchar_t*) data;
+ for (;;)
+ {
+ /* Data available. */
+ _IO_ssize_t count = (fp->_wide_data->_IO_read_end
+ - fp->_wide_data->_IO_read_ptr);
+ if (count > 0)
+ {
+ if ((_IO_size_t) count > more)
+ count = more;
+ if (count > 20)
+ {
+#ifdef _LIBC
+ s = __wmempcpy (s, fp->_wide_data->_IO_read_ptr, count);
+#else
+ memcpy (s, fp->_wide_data->_IO_read_ptr, count);
+ s += count;
+#endif
+ fp->_wide_data->_IO_read_ptr += count;
+ }
+ else if (count <= 0)
+ count = 0;
+ else
+ {
+ wchar_t *p = fp->_wide_data->_IO_read_ptr;
+ int i = (int) count;
+ while (--i >= 0)
+ *s++ = *p++;
+ fp->_wide_data->_IO_read_ptr = p;
+ }
+ more -= count;
+ }
+ if (more == 0 || __wunderflow (fp) == WEOF)
+ break;
+ }
+ return n - more;
+}
+
+
+void
+_IO_wdoallocbuf (fp)
+ _IO_FILE *fp;
+{
+ if (fp->_wide_data->_IO_buf_base)
+ return;
+ if (!(fp->_flags & _IO_UNBUFFERED))
+ if (_IO_DOALLOCATE (fp) != WEOF)
+ return;
+ _IO_wsetb (fp, fp->_wide_data->_shortbuf, fp->_wide_data->_shortbuf + 1, 0);
+}
+
+
+_IO_FILE *
+_IO_wdefault_setbuf (fp, p, len)
+ _IO_FILE *fp;
+ wchar_t *p;
+ _IO_ssize_t len;
+{
+ if (_IO_SYNC (fp) == EOF)
+ return NULL;
+ if (p == NULL || len == 0)
+ {
+ fp->_flags |= _IO_UNBUFFERED;
+ _IO_wsetb (fp, fp->_wide_data->_shortbuf, fp->_wide_data->_shortbuf + 1,
+ 0);
+ }
+ else
+ {
+ fp->_flags &= ~_IO_UNBUFFERED;
+ _IO_wsetb (fp, p, p + len, 0);
+ }
+ fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr
+ = fp->_wide_data->_IO_write_end = 0;
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr
+ = fp->_wide_data->_IO_read_end = 0;
+ return fp;
+}
+
+
+int
+_IO_wdefault_doallocate (fp)
+ _IO_FILE *fp;
+{
+ wchar_t *buf;
+
+ ALLOC_WBUF (buf, _IO_BUFSIZ, EOF);
+ _IO_wsetb (fp, buf, buf + _IO_BUFSIZ, 1);
+ return 1;
+}
+
+
+int
+_IO_switch_to_wget_mode (fp)
+ _IO_FILE *fp;
+{
+ if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base)
+ if (_IO_OVERFLOW (fp, EOF) == EOF)
+ return EOF;
+ if (_IO_in_backup (fp))
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_backup_base;
+ else
+ {
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_buf_base;
+ if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_read_end)
+ fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_write_ptr;
+ }
+ fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_write_ptr;
+
+ fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr
+ = fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_read_ptr;
+
+ fp->_flags &= ~_IO_CURRENTLY_PUTTING;
+ return 0;
+}
+
+void
+_IO_free_wbackup_area (fp)
+ _IO_FILE *fp;
+{
+ if (_IO_in_backup (fp))
+ _IO_switch_to_main_wget_area (fp); /* Just in case. */
+ free (fp->_wide_data->_IO_save_base);
+ fp->_wide_data->_IO_save_base = NULL;
+ fp->_wide_data->_IO_save_end = NULL;
+ fp->_wide_data->_IO_backup_base = NULL;
+}
+
+#if 0
+int
+_IO_switch_to_wput_mode (fp)
+ _IO_FILE *fp;
+{
+ fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_read_ptr;
+ fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_read_ptr;
+ /* Following is wrong if line- or un-buffered? */
+ fp->_wide_data->_IO_write_end = (fp->_flags & _IO_IN_BACKUP
+ ? fp->_wide_data->_IO_read_end
+ : fp->_wide_data->_IO_buf_end);
+
+ fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end;
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_end;
+
+ fp->_flags |= _IO_CURRENTLY_PUTTING;
+ return 0;
+}
+#endif
+
+
+static int
+#ifdef _LIBC
+internal_function
+#endif
+save_for_wbackup (fp, end_p)
+ _IO_FILE *fp;
+ wchar_t *end_p;
+{
+ /* Append [_IO_read_base..end_p] to backup area. */
+ _IO_ssize_t least_mark = _IO_least_wmarker (fp, end_p);
+ /* needed_size is how much space we need in the backup area. */
+ _IO_size_t needed_size = ((end_p - fp->_wide_data->_IO_read_base)
+ - least_mark);
+ /* FIXME: Dubious arithmetic if pointers are NULL */
+ _IO_size_t current_Bsize = (fp->_wide_data->_IO_save_end
+ - fp->_wide_data->_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)
+ {
+ wchar_t *new_buffer;
+ avail = 100;
+ new_buffer = (wchar_t *) malloc ((avail + needed_size)
+ * sizeof (wchar_t));
+ if (new_buffer == NULL)
+ return EOF; /* FIXME */
+ if (least_mark < 0)
+ {
+#ifdef _LIBC
+ __wmempcpy (__wmempcpy (new_buffer + avail,
+ fp->_wide_data->_IO_save_end + least_mark,
+ -least_mark),
+ fp->_wide_data->_IO_read_base,
+ end_p - fp->_wide_data->_IO_read_base);
+#else
+ memcpy (new_buffer + avail,
+ fp->_wide_data->_IO_save_end + least_mark,
+ -least_mark * sizeof (wchar_t));
+ memcpy (new_buffer + avail - least_mark,
+ fp->_wide_data->_IO_read_base,
+ (end_p - fp->_wide_data->_IO_read_base) * sizeof (wchar_t));
+#endif
+ }
+ else
+ {
+#ifdef _LIBC
+ __wmemcpy (new_buffer + avail,
+ fp->_wide_data->_IO_read_base + least_mark,
+ needed_size);
+#else
+ memcpy (new_buffer + avail,
+ fp->_wide_data->_IO_read_base + least_mark,
+ needed_size * sizeof (wchar_t));
+#endif
+ }
+ if (fp->_wide_data->_IO_save_base)
+ free (fp->_wide_data->_IO_save_base);
+ fp->_wide_data->_IO_save_base = new_buffer;
+ fp->_wide_data->_IO_save_end = new_buffer + avail + needed_size;
+ }
+ else
+ {
+ avail = current_Bsize - needed_size;
+ if (least_mark < 0)
+ {
+#ifdef _LIBC
+ __wmemmove (fp->_wide_data->_IO_save_base + avail,
+ fp->_wide_data->_IO_save_end + least_mark,
+ -least_mark);
+ __wmemcpy (fp->_wide_data->_IO_save_base + avail - least_mark,
+ fp->_wide_data->_IO_read_base,
+ end_p - fp->_wide_data->_IO_read_base);
+#else
+ memmove (fp->_wide_data->_IO_save_base + avail,
+ fp->_wide_data->_IO_save_end + least_mark,
+ -least_mark * sizeof (wchar_t));
+ memcpy (fp->_wide_data->_IO_save_base + avail - least_mark,
+ fp->_wide_data->_IO_read_base,
+ (end_p - fp->_wide_data->_IO_read_base) * sizeof (wchar_t));
+#endif
+ }
+ else if (needed_size > 0)
+#ifdef _LIBC
+ __wmemcpy (fp->_wide_data->_IO_save_base + avail,
+ fp->_wide_data->_IO_read_base + least_mark,
+ needed_size);
+#else
+ memcpy (fp->_wide_data->_IO_save_base + avail,
+ fp->_wide_data->_IO_read_base + least_mark,
+ needed_size * sizeof (wchar_t));
+#endif
+ }
+ fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_save_base + avail;
+ /* Adjust all the streammarkers. */
+ delta = end_p - fp->_wide_data->_IO_read_base;
+ for (mark = fp->_markers; mark != NULL; mark = mark->_next)
+ mark->_pos -= delta;
+ return 0;
+}
+
+wint_t
+_IO_sputbackwc (fp, c)
+ _IO_FILE *fp;
+ wint_t c;
+{
+ wint_t result;
+
+ if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base
+ && (wchar_t)fp->_wide_data->_IO_read_ptr[-1] == (wchar_t) c)
+ {
+ fp->_wide_data->_IO_read_ptr--;
+ result = c;
+ }
+ else
+ result = _IO_PBACKFAIL (fp, c);
+
+ if (result != EOF)
+ fp->_flags &= ~_IO_EOF_SEEN;
+
+ return result;
+}
+
+wint_t
+_IO_sungetwc (fp)
+ _IO_FILE *fp;
+{
+ int result;
+
+ if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base)
+ {
+ fp->_wide_data->_IO_read_ptr--;
+ result = *fp->_wide_data->_IO_read_ptr;
+ }
+ else
+ result = _IO_PBACKFAIL (fp, EOF);
+
+ if (result != WEOF)
+ fp->_flags &= ~_IO_EOF_SEEN;
+
+ return result;
+}
+
+
+unsigned
+_IO_adjust_wcolumn (start, line, count)
+ unsigned start;
+ const wchar_t *line;
+ int count;
+{
+ const wchar_t *ptr = line + count;
+ while (ptr > line)
+ if (*--ptr == L'\n')
+ return line + count - ptr - 1;
+ return start + count;
+}
+
+void
+_IO_init_wmarker (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->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_end;
+ else
+ marker->_pos = (fp->_wide_data->_IO_read_ptr
+ - fp->_wide_data->_IO_read_base);
+
+ /* Should perhaps sort the chain? */
+ marker->_next = fp->_markers;
+ fp->_markers = marker;
+}
+
+#define BAD_DELTA EOF
+
+/* Return difference between MARK and current position of MARK's stream. */
+int
+_IO_wmarker_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->_wide_data->_IO_read_ptr
+ - mark->_sbuf->_wide_data->_IO_read_end);
+ else
+ cur_pos = (mark->_sbuf->_wide_data->_IO_read_ptr
+ - mark->_sbuf->_wide_data->_IO_read_base);
+ return mark->_pos - cur_pos;
+}
+
+int
+_IO_seekwmark (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_wget_area (fp);
+ fp->_wide_data->_IO_read_ptr = (fp->_wide_data->_IO_read_base
+ + mark->_pos);
+ }
+ else
+ {
+ if (!_IO_in_backup (fp))
+ _IO_switch_to_wbackup_area (fp);
+ fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end + mark->_pos;
+ }
+ return 0;
+}
+
+void
+_IO_unsave_wmarkers (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_wbackup_area (fp);
+}