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fix the NANO_WIDE #ifdefs again, and put display_string_len() back in 

now that it doesn't corrupt memory anymore (as far as I can tell)


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2202 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
David Lawrence Ramsey 2004-12-27 23:11:59 +00:00
parent a35bdd1f03
commit 6a643cd596
2 changed files with 154 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
ChangeLog
View File

@ -52,12 +52,12 @@ CVS code -
Movement and cursor display in the edit window should now work
properly with files containing multibyte characters, and text
display of such files should work properly some of the time.
New functions control_rep(), parse_char(), move_left(), and
move_right(); changes to do_left(), do_right(), do_delete(),
breakable(), break_line(), do_output(), get_buffer(),
unget_input(), actual_x(), strnlenpt(), display_string(),
titlebar(), statusbar(), onekey(), and do_credits(). (David
Benbennick and DLR)
New functions control_rep(), parse_char(), move_left(),
move_right(), and display_string_len(); changes to do_left(),
do_right(), do_delete(), breakable(), break_line(),
do_output(), get_buffer(), unget_input(), actual_x(),
strnlenpt(), display_string(), titlebar(), statusbar(),
onekey(), and do_credits(). (David Benbennick and DLR)
- cut.c:
do_cut_text()
- If keep_cutbuffer is FALSE, only blow away the text in the

187
src/winio.c
View File

@ -1720,6 +1720,109 @@ void blank_bottombars(void)
}
}
/* buf is a multibyte string to be displayed. We need to expand tabs
* and control characters. How many bytes do we need to display?
* start_col is the column of *buf (usually 0). We display to
* (end_col - 1). */
size_t display_string_len(const char *buf, size_t start_col, size_t
end_col)
{
size_t retval = 0;
assert(buf != NULL);
/* Throughout the loop, we maintain the fact that *buf displays at
* column start_col. */
while (start_col <= end_col && *buf != '\0') {
int wide_buf, wide_buf_len;
size_t old_col = start_col;
#ifdef NANO_WIDE
bool bad_char;
#endif
wide_buf_len = parse_char(buf, &wide_buf, &start_col
#ifdef NANO_WIDE
, &bad_char
#endif
);
#ifdef NANO_WIDE
/* If buf contains a null byte or an invalid multibyte
* character, interpret that character as though it's a wide
* character. */
if (!ISSET(NO_UTF8) && bad_char) {
char *bad_wide_buf = charalloc(MB_CUR_MAX);
int bad_wide_buf_len;
/* If we have a control character, add one byte to account
* for the "^" that will be displayed in front of it, and
* translate the character to its visible equivalent as
* returned by control_rep(). */
if (is_cntrl_char(wide_buf)) {
retval++;
wide_buf = control_rep((unsigned char)wide_buf);
}
/* Translate the wide character to its multibyte
* equivalent. */
bad_wide_buf_len = wctomb(bad_wide_buf, (wchar_t)wide_buf);
if (bad_wide_buf_len != -1)
retval += bad_wide_buf_len;
free(bad_wide_buf);
} else {
#endif
/* If we have a tab, get its width in bytes using the
* current value of col. */
if (wide_buf == '\t')
retval += start_col - old_col;
/* If we have a control character, add one byte to account
* for the "^" that will be displayed in front of it, and
* then add the number of bytes for its visible equivalent
* as returned by control_rep(). If we have an invalid
* multibyte control character, interpret that character as
* though it's a normal control character. */
else if (is_cntrl_char(wide_buf)) {
char ctrl_wide_buf =
control_rep((unsigned char)wide_buf);
retval++;
retval += parse_char(&ctrl_wide_buf, NULL, NULL
#ifdef NANO_WIDE
, NULL
#endif
);
/* If we have a normal character, add its width in bytes
* normally. */
} else
#ifdef NANO_WIDE
/* If buf contains an invalid multibyte non-control
* character, interpret that character as though it's a
* normal non-control character. */
if (!ISSET(NO_UTF8) && bad_char) {
char *bad_wide_buf = charalloc(MB_CUR_MAX);
int bad_wide_buf_len;
bad_wide_buf_len = wctomb(bad_wide_buf,
(wchar_t)wide_buf);
free(bad_wide_buf);
retval += bad_wide_buf_len;
} else
#endif
retval += wide_buf_len;
#ifdef NANO_WIDE
}
buf += wide_buf_len;
#endif
}
return retval;
}
/* Convert buf into a string that can be displayed on screen. The
* caller wants to display buf starting with column start_col, and
* extending for at most len columns. start_col is zero-based. len is
@ -1755,13 +1858,8 @@ char *display_string(const char *buf, size_t start_col, size_t len, bool
assert(column <= start_col);
#ifdef NANO_WIDE
if (!ISSET(NO_UTF8))
alloc_len = len * MB_CUR_MAX;
else
#endif
alloc_len = len;
alloc_len = display_string_len(buf + start_index, start_col,
start_col + COLS);
converted = charalloc(alloc_len + 1);
index = 0;
@ -1787,12 +1885,18 @@ char *display_string(const char *buf, size_t start_col, size_t len, bool
int ctrl_wide_buf_len, i;
wide_buf = control_rep((unsigned char)wide_buf);
ctrl_wide_buf_len =
#ifdef NANO_WIDE
!ISSET(NO_UTF8) ? wctomb(ctrl_wide_buf,
(wchar_t)wide_buf) :
if (!ISSET(NO_UTF8))
ctrl_wide_buf_len = wctomb(ctrl_wide_buf,
(wchar_t)wide_buf);
else {
#endif
ctrl_wide_buf_len = 1;
ctrl_wide_buf[0] = (unsigned char)wide_buf;
#ifdef NANO_WIDE
}
#endif
1;
for (i = 0; i < ctrl_wide_buf_len; i++)
converted[index++] = ctrl_wide_buf[i];
@ -1826,27 +1930,6 @@ char *display_string(const char *buf, size_t start_col, size_t len, bool
#endif
);
#ifdef NANO_WIDE
if (!ISSET(NO_UTF8) && bad_char) {
char *bad_wide_buf = charalloc(MB_CUR_MAX);
int bad_wide_buf_len, i;
if (is_cntrl_char(wide_buf)) {
converted[index++] = '^';
start_col++;
wide_buf = control_rep((unsigned char)wide_buf);
}
bad_wide_buf_len = wctomb(bad_wide_buf, (wchar_t)wide_buf);
for (i = 0; i < bad_wide_buf_len; i++)
converted[index++] = bad_wide_buf[i];
free(bad_wide_buf);
start_col += wcwidth((wchar_t)wide_buf);
} else
#endif
if (wide_buf == '\t') {
converted[index++] =
#if !defined(NANO_SMALL) && defined(ENABLE_NANORC)
@ -1858,6 +1941,9 @@ 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 it
* contains an invalid multibyte control character, interpret
* that character as though it's a normal control character. */
} else if (is_cntrl_char(wide_buf)) {
char *ctrl_wide_buf =
#ifdef NANO_WIDE
@ -1870,12 +1956,17 @@ char *display_string(const char *buf, size_t start_col, size_t len, bool
start_col++;
wide_buf = control_rep((unsigned char)wide_buf);
ctrl_wide_buf_len =
#ifdef NANO_WIDE
!ISSET(NO_UTF8) ? wctomb(ctrl_wide_buf,
(wchar_t)wide_buf) :
if (!ISSET(NO_UTF8))
ctrl_wide_buf_len = wctomb(ctrl_wide_buf,
(wchar_t)wide_buf);
else {
#endif
ctrl_wide_buf_len = 1;
ctrl_wide_buf[0] = (unsigned char)wide_buf;
#ifdef NANO_WIDE
}
#endif
1;
for (i = 0; i < ctrl_wide_buf_len; i++)
converted[index++] = ctrl_wide_buf[i];
@ -1897,10 +1988,28 @@ char *display_string(const char *buf, size_t start_col, size_t len, bool
} else {
int i;
for (i = 0; i < wide_buf_len; i++)
converted[index++] = buf[start_index + i];
#ifdef NANO_WIDE
/* If buf contains an invalid multibyte non-control
* character, interpret that character as though it's a
* normal non-control character. */
if (!ISSET(NO_UTF8) && bad_char) {
char *bad_wide_buf = charalloc(MB_CUR_MAX);
int bad_wide_buf_len;
bad_wide_buf_len = wctomb(bad_wide_buf,
(wchar_t)wide_buf);
for (i = 0; i < bad_wide_buf_len; i++)
converted[index++] = bad_wide_buf[i];
free(bad_wide_buf);
} else {
#endif
for (i = 0; i < wide_buf_len; i++)
converted[index++] = buf[start_index + i];
#ifdef NANO_WIDE
}
if (!ISSET(NO_UTF8))
start_col += wcwidth((wchar_t)wide_buf);
else