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Making sure an invalid starting byte of a multibyte sequence is properly 

terminated, to prevent the displaying of ghost characters.


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5206 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
Benno Schulenberg 2015-04-18 20:07:31 +00:00
parent 296152ec67
commit 455a918071
2 changed files with 16 additions and 6 deletions
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8
ChangeLog
View File

@ -1,6 +1,14 @@
2015-04-18 Benno Schulenberg <bensberg@justemail.net>
* src/global.c, src/nano.c, doc/man/nanorc.5, doc/texinfo/nano.texi:
Make the descriptions of the multibuffer feature more accurate.
* src/winio.c (display_string): Make sure an invalid starting byte
of a multibyte sequence is properly terminated, so that it doesn't
pick up lingering bytes of any previous content. This prevents the
displaying of ghosts -- characters that aren't really there -- when a
file contains valid ánd invalid UTF-8 sequences. For an example see:
https://lists.gnu.org/archive/html/nano-devel/2015-04/msg00052.html.
Also make two comments more accurate: an invalid multibyte sequence
will never be categorized as a control character or anything else.
2015-04-18 Mark Oteiza <mvoteiza@udel.edu>
* doc/syntax/{python,ruby,sh,tex}.nanorc: Add a linter definition.

14
src/winio.c
View File

@ -2004,9 +2004,7 @@ char *display_string(const char *buf, size_t start_col, size_t len, bool
converted[index++] = ' ';
start_col++;
}
/* If buf contains a control character, interpret it. If buf
* contains an invalid multibyte control character, display it
* as such. */
/* If buf contains a control character, interpret it. */
} else if (is_cntrl_mbchar(buf_mb)) {
char *ctrl_buf_mb = charalloc(mb_cur_max());
int ctrl_buf_mb_len, i;
@ -2036,13 +2034,17 @@ char *display_string(const char *buf, size_t start_col, size_t len, bool
#endif
converted[index++] = ' ';
start_col++;
/* If buf contains a non-control character, interpret it. If
* buf contains an invalid multibyte non-control character,
* display it as such. */
/* If buf contains a non-control character, interpret it. If buf
* contains an invalid multibyte sequence, display it as such. */
} else {
char *nctrl_buf_mb = charalloc(mb_cur_max());
int nctrl_buf_mb_len, i;
/* Make sure an invalid sequence-starter byte is properly
* terminated, so that it doesn't pick up lingering bytes
* of any previous content. */
null_at(&buf_mb, buf_mb_len);
nctrl_buf_mb = mbrep(buf_mb, nctrl_buf_mb,
&nctrl_buf_mb_len);