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From e87ab5b991b08092a7e07af82b3ec822a8604151 Mon Sep 17 00:00:00 2001
From: Ondrej Oprala <ooprala@redhat.com>
Date: Wed, 5 Aug 2015 09:15:09 +0200
Subject: [PATCH] expand,unexpand: add multibyte support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
* NEWS: Mention the changes.
* bootstrap.conf: Add mbfile to the list of modules.
* configure.ac: Properly initialize mbfile.
* src/expand.c (expand): Iterate over multibyte characters properly.
* src/unexpand.c (unexpand): Iterate over multibyte characters
properly.
* tests/local.mk: Add new tests.
* tests/{expand,unexpand}/mb.sh: New tests.
Co-authored-by: Pádraig Brady <pbrady@redhat.com>
---
bootstrap.conf | 1 +
configure.ac | 2 +
lib/mbfile.c | 3 +
lib/mbfile.h | 255 +++++++++++++++++++++++++++++++++++++++++++++++++++
m4/mbfile.m4 | 14 +++
src/expand.c | 43 +++++----
src/unexpand.c | 54 +++++++----
tests/expand/mb.sh | 98 ++++++++++++++++++++
tests/local.mk | 2 +
tests/unexpand/mb.sh | 97 ++++++++++++++++++++
10 files changed, 535 insertions(+), 34 deletions(-)
create mode 100644 lib/mbfile.c
create mode 100644 lib/mbfile.h
create mode 100644 m4/mbfile.m4
create mode 100755 tests/expand/mb.sh
create mode 100755 tests/unexpand/mb.sh
diff --git a/bootstrap.conf b/bootstrap.conf
index 8a0ff31..a1c78b2 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -152,6 +152,7 @@ gnulib_modules="
maintainer-makefile
malloc-gnu
manywarnings
+ mbfile
mbrlen
mbrtowc
mbsalign
diff --git a/configure.ac b/configure.ac
index 1e74b36..24c9725 100644
--- a/configure.ac
+++ b/configure.ac
@@ -427,6 +427,8 @@ fi
# I'm leaving it here for now. This whole thing needs to be modernized...
gl_WINSIZE_IN_PTEM
+gl_MBFILE
+
gl_HEADER_TIOCGWINSZ_IN_TERMIOS_H
if test $gl_cv_sys_tiocgwinsz_needs_termios_h = no && \
diff --git a/lib/mbfile.c b/lib/mbfile.c
new file mode 100644
index 0000000..b0a468e
--- /dev/null
+++ b/lib/mbfile.c
@@ -0,0 +1,3 @@
+#include <config.h>
+#define MBFILE_INLINE _GL_EXTERN_INLINE
+#include "mbfile.h"
diff --git a/lib/mbfile.h b/lib/mbfile.h
new file mode 100644
index 0000000..11f1b12
--- /dev/null
+++ b/lib/mbfile.h
@@ -0,0 +1,255 @@
+/* Multibyte character I/O: macros for multi-byte encodings.
+ Copyright (C) 2001, 2005, 2009-2015 Free Software Foundation, Inc.
+
+ This program 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 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Mitsuru Chinen <mchinen@yamato.ibm.com>
+ and Bruno Haible <bruno@clisp.org>. */
+
+/* The macros in this file implement multi-byte character input from a
+ stream.
+
+ mb_file_t
+ is the type for multibyte character input stream, usable for variable
+ declarations.
+
+ mbf_char_t
+ is the type for multibyte character or EOF, usable for variable
+ declarations.
+
+ mbf_init (mbf, stream)
+ initializes the MB_FILE for reading from stream.
+
+ mbf_getc (mbc, mbf)
+ reads the next multibyte character from mbf and stores it in mbc.
+
+ mb_iseof (mbc)
+ returns true if mbc represents the EOF value.
+
+ Here are the function prototypes of the macros.
+
+ extern void mbf_init (mb_file_t mbf, FILE *stream);
+ extern void mbf_getc (mbf_char_t mbc, mb_file_t mbf);
+ extern bool mb_iseof (const mbf_char_t mbc);
+ */
+
+#ifndef _MBFILE_H
+#define _MBFILE_H 1
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
+ <wchar.h>. */
+#include <stdio.h>
+#include <time.h>
+#include <wchar.h>
+
+#include "mbchar.h"
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef MBFILE_INLINE
+# define MBFILE_INLINE _GL_INLINE
+#endif
+
+struct mbfile_multi {
+ FILE *fp;
+ bool eof_seen;
+ bool have_pushback;
+ mbstate_t state;
+ unsigned int bufcount;
+ char buf[MBCHAR_BUF_SIZE];
+ struct mbchar pushback;
+};
+
+MBFILE_INLINE void
+mbfile_multi_getc (struct mbchar *mbc, struct mbfile_multi *mbf)
+{
+ size_t bytes;
+
+ /* If EOF has already been seen, don't use getc. This matters if
+ mbf->fp is connected to an interactive tty. */
+ if (mbf->eof_seen)
+ goto eof;
+
+ /* Return character pushed back, if there is one. */
+ if (mbf->have_pushback)
+ {
+ mb_copy (mbc, &mbf->pushback);
+ mbf->have_pushback = false;
+ return;
+ }
+
+ /* Before using mbrtowc, we need at least one byte. */
+ if (mbf->bufcount == 0)
+ {
+ int c = getc (mbf->fp);
+ if (c == EOF)
+ {
+ mbf->eof_seen = true;
+ goto eof;
+ }
+ mbf->buf[0] = (unsigned char) c;
+ mbf->bufcount++;
+ }
+
+ /* Handle most ASCII characters quickly, without calling mbrtowc(). */
+ if (mbf->bufcount == 1 && mbsinit (&mbf->state) && is_basic (mbf->buf[0]))
+ {
+ /* These characters are part of the basic character set. ISO C 99
+ guarantees that their wide character code is identical to their
+ char code. */
+ mbc->wc = mbc->buf[0] = mbf->buf[0];
+ mbc->wc_valid = true;
+ mbc->ptr = &mbc->buf[0];
+ mbc->bytes = 1;
+ mbf->bufcount = 0;
+ return;
+ }
+
+ /* Use mbrtowc on an increasing number of bytes. Read only as many bytes
+ from mbf->fp as needed. This is needed to give reasonable interactive
+ behaviour when mbf->fp is connected to an interactive tty. */
+ for (;;)
+ {
+ /* We don't know whether the 'mbrtowc' function updates the state when
+ it returns -2, - this is the ISO C 99 and glibc-2.2 behaviour - or
+ not - amended ANSI C, glibc-2.1 and Solaris 2.7 behaviour. We
+ don't have an autoconf test for this, yet.
+ The new behaviour would allow us to feed the bytes one by one into
+ mbrtowc. But the old behaviour forces us to feed all bytes since
+ the end of the last character into mbrtowc. Since we want to retry
+ with more bytes when mbrtowc returns -2, we must backup the state
+ before calling mbrtowc, because implementations with the new
+ behaviour will clobber it. */
+ mbstate_t backup_state = mbf->state;
+
+ bytes = mbrtowc (&mbc->wc, &mbf->buf[0], mbf->bufcount, &mbf->state);
+
+ if (bytes == (size_t) -1)
+ {
+ /* An invalid multibyte sequence was encountered. */
+ /* Return a single byte. */
+ bytes = 1;
+ mbc->wc_valid = false;
+ break;
+ }
+ else if (bytes == (size_t) -2)
+ {
+ /* An incomplete multibyte character. */
+ mbf->state = backup_state;
+ if (mbf->bufcount == MBCHAR_BUF_SIZE)
+ {
+ /* An overlong incomplete multibyte sequence was encountered. */
+ /* Return a single byte. */
+ bytes = 1;
+ mbc->wc_valid = false;
+ break;
+ }
+ else
+ {
+ /* Read one more byte and retry mbrtowc. */
+ int c = getc (mbf->fp);
+ if (c == EOF)
+ {
+ /* An incomplete multibyte character at the end. */
+ mbf->eof_seen = true;
+ bytes = mbf->bufcount;
+ mbc->wc_valid = false;
+ break;
+ }
+ mbf->buf[mbf->bufcount] = (unsigned char) c;
+ mbf->bufcount++;
+ }
+ }
+ else
+ {
+ if (bytes == 0)
+ {
+ /* A null wide character was encountered. */
+ bytes = 1;
+ assert (mbf->buf[0] == '\0');
+ assert (mbc->wc == 0);
+ }
+ mbc->wc_valid = true;
+ break;
+ }
+ }
+
+ /* Return the multibyte sequence mbf->buf[0..bytes-1]. */
+ mbc->ptr = &mbc->buf[0];
+ memcpy (&mbc->buf[0], &mbf->buf[0], bytes);
+ mbc->bytes = bytes;
+
+ mbf->bufcount -= bytes;
+ if (mbf->bufcount > 0)
+ {
+ /* It's not worth calling memmove() for so few bytes. */
+ unsigned int count = mbf->bufcount;
+ char *p = &mbf->buf[0];
+
+ do
+ {
+ *p = *(p + bytes);
+ p++;
+ }
+ while (--count > 0);
+ }
+ return;
+
+eof:
+ /* An mbchar_t with bytes == 0 is used to indicate EOF. */
+ mbc->ptr = NULL;
+ mbc->bytes = 0;
+ mbc->wc_valid = false;
+ return;
+}
+
+MBFILE_INLINE void
+mbfile_multi_ungetc (const struct mbchar *mbc, struct mbfile_multi *mbf)
+{
+ mb_copy (&mbf->pushback, mbc);
+ mbf->have_pushback = true;
+}
+
+typedef struct mbfile_multi mb_file_t;
+
+typedef mbchar_t mbf_char_t;
+
+#define mbf_init(mbf, stream) \
+ ((mbf).fp = (stream), \
+ (mbf).eof_seen = false, \
+ (mbf).have_pushback = false, \
+ memset (&(mbf).state, '\0', sizeof (mbstate_t)), \
+ (mbf).bufcount = 0)
+
+#define mbf_getc(mbc, mbf) mbfile_multi_getc (&(mbc), &(mbf))
+
+#define mbf_ungetc(mbc, mbf) mbfile_multi_ungetc (&(mbc), &(mbf))
+
+#define mb_iseof(mbc) ((mbc).bytes == 0)
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+
+#endif /* _MBFILE_H */
diff --git a/m4/mbfile.m4 b/m4/mbfile.m4
new file mode 100644
index 0000000..8589902
--- /dev/null
+++ b/m4/mbfile.m4
@@ -0,0 +1,14 @@
+# mbfile.m4 serial 7
+dnl Copyright (C) 2005, 2008-2015 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl autoconf tests required for use of mbfile.h
+dnl From Bruno Haible.
+
+AC_DEFUN([gl_MBFILE],
+[
+ AC_REQUIRE([AC_TYPE_MBSTATE_T])
+ :
+])
diff --git a/src/expand.c b/src/expand.c
index 9fa2e10..380e020 100644
--- a/src/expand.c
+++ b/src/expand.c
@@ -37,6 +37,9 @@
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
+
+#include <mbfile.h>
+
#include "system.h"
#include "die.h"
#include "xstrndup.h"
@@ -100,19 +103,19 @@ expand (void)
{
/* Input stream. */
FILE *fp = next_file (NULL);
+ mb_file_t mbf;
+ mbf_char_t c;
if (!fp)
return;
+ mbf_init (mbf, fp);
+
while (true)
{
- /* Input character, or EOF. */
- int c;
-
/* If true, perform translations. */
bool convert = true;
-
/* The following variables have valid values only when CONVERT
is true: */
@@ -122,17 +125,23 @@ expand (void)
/* Index in TAB_LIST of next tab stop to examine. */
size_t tab_index = 0;
-
/* Convert a line of text. */
do
{
- while ((c = getc (fp)) < 0 && (fp = next_file (fp)))
- continue;
+ do {
+ mbf_getc (c, mbf);
+ if (mb_iseof (c))
+ {
+ mbf_init (mbf, fp = next_file (fp));
+ continue;
+ }
+ }
+ while (false);
if (convert)
{
- if (c == '\t')
+ if (mb_iseq (c, '\t'))
{
/* Column the next input tab stop is on. */
uintmax_t next_tab_column;
@@ -151,32 +160,34 @@ expand (void)
if (putchar (' ') < 0)
die (EXIT_FAILURE, errno, _("write error"));
- c = ' ';
+ mb_setascii (&c, ' ');
}
- else if (c == '\b')
+ else if (mb_iseq (c, '\b'))
{
/* Go back one column, and force recalculation of the
next tab stop. */
column -= !!column;
tab_index -= !!tab_index;
}
- else
+ /* A leading control character could make us trip over. */
+ else if (!mb_iscntrl (c))
{
- column++;
+ column += mb_width (c);
if (!column)
die (EXIT_FAILURE, 0, _("input line is too long"));
}
- convert &= convert_entire_line || !! isblank (c);
+ convert &= convert_entire_line || mb_isblank (c);
}
- if (c < 0)
+ if (mb_iseof (c))
return;
- if (putchar (c) < 0)
+ mb_putc (c, stdout);
+ if (ferror (stdout))
die (EXIT_FAILURE, errno, _("write error"));
}
- while (c != '\n');
+ while (!mb_iseq (c, '\n'));
}
}
diff --git a/src/unexpand.c b/src/unexpand.c
index 7801274..569a7ee 100644
--- a/src/unexpand.c
+++ b/src/unexpand.c
@@ -38,6 +38,9 @@
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
+
+#include <mbfile.h>
+
#include "system.h"
#include "die.h"
#include "xstrndup.h"
@@ -107,11 +110,12 @@ unexpand (void)
{
/* Input stream. */
FILE *fp = next_file (NULL);
+ mb_file_t mbf;
/* The array of pending blanks. In non-POSIX locales, blanks can
include characters other than spaces, so the blanks must be
stored, not merely counted. */
- char *pending_blank;
+ mbf_char_t *pending_blank;
if (!fp)
return;
@@ -119,12 +123,14 @@ unexpand (void)
/* The worst case is a non-blank character, then one blank, then a
tab stop, then MAX_COLUMN_WIDTH - 1 blanks, then a non-blank; so
allocate MAX_COLUMN_WIDTH bytes to store the blanks. */
- pending_blank = xmalloc (max_column_width);
+ pending_blank = xmalloc (max_column_width * sizeof (mbf_char_t));
+
+ mbf_init (mbf, fp);
while (true)
{
/* Input character, or EOF. */
- int c;
+ mbf_char_t c;
/* If true, perform translations. */
bool convert = true;
@@ -158,12 +164,19 @@ unexpand (void)
do
{
- while ((c = getc (fp)) < 0 && (fp = next_file (fp)))
- continue;
+ do {
+ mbf_getc (c, mbf);
+ if (mb_iseof (c))
+ {
+ mbf_init (mbf, fp = next_file (fp));
+ continue;
+ }
+ }
+ while (false);
if (convert)
{
- bool blank = !! isblank (c);
+ bool blank = mb_isblank (c);
if (blank)
{
@@ -180,16 +193,16 @@ unexpand (void)
if (next_tab_column < column)
die (EXIT_FAILURE, 0, _("input line is too long"));
- if (c == '\t')
+ if (mb_iseq (c, '\t'))
{
column = next_tab_column;
if (pending)
- pending_blank[0] = '\t';
+ mb_setascii (&pending_blank[0], '\t');
}
else
{
- column++;
+ column += mb_width (c);
if (! (prev_blank && column == next_tab_column))
{
@@ -197,13 +210,14 @@ unexpand (void)
will be replaced by tabs. */
if (column == next_tab_column)
one_blank_before_tab_stop = true;
- pending_blank[pending++] = c;
+ mb_copy (&pending_blank[pending++], &c);
prev_blank = true;
continue;
}
/* Replace the pending blanks by a tab or two. */
- pending_blank[0] = c = '\t';
+ mb_setascii (&c, '\t');
+ mb_setascii (&pending_blank[0], '\t');
}
/* Discard pending blanks, unless it was a single
@@ -211,7 +225,7 @@ unexpand (void)
pending = one_blank_before_tab_stop;
}
}
- else if (c == '\b')
+ else if (mb_iseq (c, '\b'))
{
/* Go back one column, and force recalculation of the
next tab stop. */
@@ -221,16 +235,20 @@ unexpand (void)
}
else
{
- column++;
- if (!column)
+ const uintmax_t orig_column = column;
+ column += mb_width (c);
+ if (column < orig_column)
die (EXIT_FAILURE, 0, _("input line is too long"));
}
if (pending)
{
if (pending > 1 && one_blank_before_tab_stop)
- pending_blank[0] = '\t';
- if (fwrite (pending_blank, 1, pending, stdout) != pending)
+ mb_setascii (&pending_blank[0], '\t');
+
+ for (int n = 0; n < pending; ++n)
+ mb_putc (pending_blank[n], stdout);
+ if (ferror (stdout))
die (EXIT_FAILURE, errno, _("write error"));
pending = 0;
one_blank_before_tab_stop = false;
@@ -240,16 +258,17 @@ unexpand (void)
convert &= convert_entire_line || blank;
}
- if (c < 0)
+ if (mb_iseof (c))
{
free (pending_blank);
return;
}
- if (putchar (c) < 0)
+ mb_putc (c, stdout);
+ if (ferror (stdout))
die (EXIT_FAILURE, errno, _("write error"));
}
- while (c != '\n');
+ while (!mb_iseq (c, '\n'));
}
}
diff --git a/tests/expand/mb.sh b/tests/expand/mb.sh
new file mode 100755
index 0000000..7971e18
--- /dev/null
+++ b/tests/expand/mb.sh
@@ -0,0 +1,98 @@
+#!/bin/sh
+
+# Copyright (C) 2012-2015 Free Software Foundation, Inc.
+
+# This program 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 3 of the License, or
+# (at your option) any later version.
+
+# This program 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 program. If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ expand
+
+export LC_ALL=en_US.UTF-8
+
+#input containing multibyte characters
+cat <<\EOF > in || framework_failure_
+1234567812345678123456781
+. . . .
+a b c d
+. . . .
+ä ö ü ß
+. . . .
+EOF
+env printf ' äöü\t. öüä. \tä xx\n' >> in || framework_failure_
+
+cat <<\EOF > exp || framework_failure_
+1234567812345678123456781
+. . . .
+a b c d
+. . . .
+ä ö ü ß
+. . . .
+ äöü . öüä. ä xx
+EOF
+
+expand < in > out || fail=1
+compare exp out > /dev/null 2>&1 || fail=1
+
+#test characters with display widths != 1
+env printf '12345678
+e\t|ascii(1)
+\u00E9\t|composed(1)
+e\u0301\t|decomposed(1)
+\u3000\t|ideo-space(2)
+\uFF0D\t|full-hypen(2)
+' > in || framework_failure_
+
+env printf '12345678
+e |ascii(1)
+\u00E9 |composed(1)
+e\u0301 |decomposed(1)
+\u3000 |ideo-space(2)
+\uFF0D |full-hypen(2)
+' > exp || framework_failure_
+
+expand < in > out || fail=1
+compare exp out > /dev/null 2>&1 || fail=1
+
+#shouldn't fail with "input line too long"
+#when a line starts with a control character
+env printf '\n' > in || framework_failure_
+
+expand < in > out || fail=1
+compare in out > /dev/null 2>&1 || fail=1
+
+#non-Unicode characters interspersed between Unicode ones
+env printf '12345678
+\t\xFF|
+\xFF\t|
+\t\xFFä|
+ä\xFF\t|
+\tä\xFF|
+\xFF\tä|
+äbcdef\xFF\t|
+' > in || framework_failure_
+
+env printf '12345678
+ \xFF|
+\xFF |
+ \xFFä|
+ä\xFF |
+ ä\xFF|
+\xFF ä|
+äbcdef\xFF |
+' > exp || framework_failure_
+
+expand < in > out || fail=1
+compare exp out > /dev/null 2>&1 || fail=1
+
+exit $fail
diff --git a/tests/local.mk b/tests/local.mk
index 192f776..8053397 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -544,6 +544,7 @@ all_tests = \
tests/du/threshold.sh \
tests/du/trailing-slash.sh \
tests/du/two-args.sh \
+ tests/expand/mb.sh \
tests/id/gnu-zero-uids.sh \
tests/id/no-context.sh \
tests/id/context.sh \
@@ -684,6 +685,7 @@ all_tests = \
tests/touch/read-only.sh \
tests/touch/relative.sh \
tests/touch/trailing-slash.sh \
+ tests/unexpand/mb.sh \
$(all_root_tests)
# See tests/factor/create-test.sh.
diff --git a/tests/unexpand/mb.sh b/tests/unexpand/mb.sh
new file mode 100755
index 0000000..60d4c1a
--- /dev/null
+++ b/tests/unexpand/mb.sh
@@ -0,0 +1,97 @@
+#!/bin/sh
+
+# Copyright (C) 2012-2015 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ unexpand
+
+export LC_ALL=en_US.UTF-8
+
+#input containing multibyte characters
+cat > in <<\EOF
+1234567812345678123456781
+. . . .
+a b c d
+. . . .
+ä ö ü ß
+. . . .
+ äöü . öüä. ä xx
+EOF
+
+cat > exp <<\EOF
+1234567812345678123456781
+. . . .
+a b c d
+. . . .
+ä ö ü ß
+. . . .
+ äöü . öüä. ä xx
+EOF
+
+unexpand -a < in > out || fail=1
+compare exp out > /dev/null 2>&1 || fail=1
+
+#test characters with a display width larger than 1
+
+env printf '12345678
+e |ascii(1)
+\u00E9 |composed(1)
+e\u0301 |decomposed(1)
+\u3000 |ideo-space(2)
+\uFF0D |full-hypen(2)
+' > in || framework_failure_
+
+env printf '12345678
+e\t|ascii(1)
+\u00E9\t|composed(1)
+e\u0301\t|decomposed(1)
+\u3000\t|ideo-space(2)
+\uFF0D\t|full-hypen(2)
+' > exp || framework_failure_
+
+unexpand -a < in > out || fail=1
+compare exp out > /dev/null 2>&1 || fail=1
+
+#test input where a blank of width > 1 is not being substituted
+in="$(LC_ALL=en_US.UTF-8 printf ' \u3000 ö ü ß')"
+exp=' 　 ö ü ß'
+
+unexpand -a < in > out || fail=1
+compare exp out > /dev/null 2>&1 || fail=1
+
+#non-Unicode characters interspersed between Unicode ones
+env printf '12345678
+ \xFF|
+\xFF |
+ \xFFä|
+ä\xFF |
+ ä\xFF|
+\xFF ä|
+äbcdef\xFF |
+' > in || framework_failure_
+
+env printf '12345678
+\t\xFF|
+\xFF\t|
+\t\xFFä|
+ä\xFF\t|
+\tä\xFF|
+\xFF\tä|
+äbcdef\xFF\t|
+' > exp || framework_failure_
+
+unexpand -a < in > out || fail=1
+compare exp out > /dev/null 2>&1 || fail=1
--
2.7.4
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