when getting printable input from the edit window or statusbar prompt,

don't swallow non-ASCII control characters, since they're parts of UTF-8
sequences


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2378 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -94,17 +94,17 @@ CVS code -
 	  support to a few more functions as well, and move multibyte
 	  character-specific functions to their own source file.  New
 	  file chars.c; new functions is_alnum_char(),
-	  is_alnum_mbchar(), is_alnum_wchar(), is_blank_mbchar(),
-	  is_blank_wchar(), is_cntrl_mbchar(), is_cntrl_wchar(),
-	  control_mbrep(), control_wrep(), mbwidth(), mb_cur_max(),
-	  make_mbchar(), mbstrlen(), mbstrnlen(), mbstrcasecmp(),
-	  mbstrncasecmp(), mbstrcasestr(), and mbrevstrcasestr();
-	  changes to help_init(), is_byte() (moved to chars.c),
-	  is_blank_char() (moved to chars.c), is_cntrl_char() (moved to
-	  chars.c), nstricmp() (renamed nstrcasecmp() and moved to
-	  chars.c), nstrnicmp() (renamed nstrncasecmp() and moved to
-	  chars.c), nstristr() (renamed nstrcasestr() and moved to
-	  chars.c), revstrstr() (moved to chars.c), revstristr()
+	  is_alnum_mbchar(), is_alnum_wchar(), is_ascii_char(),
+	  is_blank_mbchar(), is_blank_wchar(), is_cntrl_mbchar(),
+	  is_cntrl_wchar(), control_mbrep(), control_wrep(), mbwidth(),
+	  mb_cur_max(), make_mbchar(), mbstrlen(), mbstrnlen(),
+	  mbstrcasecmp(), mbstrncasecmp(), mbstrcasestr(), and
+	  mbrevstrcasestr(); changes to help_init(), is_byte() (moved to
+	  chars.c), is_blank_char() (moved to chars.c), is_cntrl_char()
+	  (moved to chars.c), nstricmp() (renamed nstrcasecmp() and
+	  moved to chars.c), nstrnicmp() (renamed nstrncasecmp() and
+	  moved to chars.c), nstristr() (renamed nstrcasestr() and moved
+	  to chars.c), revstrstr() (moved to chars.c), revstristr()
 	  (renamed revstrcasestr() and moved to chars.c), nstrnlen()
 	  (moved to chars.c), parse_char() (renamed parse_mbchar() and
 	  moved to chars.c), move_left() (renamed move_mbleft() and
@@ -328,8 +328,8 @@ CVS code -
 	  obsolete and it defines a struct termio that we don't use
 	  anywhere. (DLR)
 	- Typo fixes. (DLR)
-	- Add checks for iswalnum(), iswblank() or iswspace(), mblen(),
-	  and wctype.h. (DLR)
+	- Add checks for isascii(), iswalnum(), iswblank() or
+	  iswspace(), mblen(), and wctype.h. (DLR)
 - doc/faq.html:
 	- Remove now-inaccurate note about verbatim input's not working
 	  at prompts, and update its description to mention that it

configure.ac

@@ -291,7 +291,7 @@ AC_MSG_WARN([*** Can not use slang when cross-compiling])),
     esac], [AC_MSG_RESULT(no)])
 
 dnl Checks for functions
-AC_CHECK_FUNCS(snprintf vsnprintf isblank iswalnum iswblank iswspace strcasecmp strncasecmp strcasestr strnlen getline getdelim mblen mbtowc wctomb wcwidth)
+AC_CHECK_FUNCS(snprintf vsnprintf isascii isblank iswalnum iswblank iswspace strcasecmp strncasecmp strcasestr strnlen getline getdelim mblen mbtowc wctomb wcwidth)
 if test "x$ac_cv_func_snprintf" = "xno" -o "x$ac_cv_func_vsnprintf" = "xno"
 then
 	AM_PATH_GLIB_2_0(2.0.0,,

src/chars.c

@@ -81,6 +81,18 @@ bool is_alnum_wchar(wchar_t wc)
 }
 #endif
 
+/* This function is equivalent to isascii(). */
+bool is_ascii_char(int c)
+{
+    return
+#ifdef HAVE_ISASCII
+	isascii(c)
+#else
+	((unsigned int)c == (signed char)c)
+#endif
+	;
+}
+
 /* This function is equivalent to isblank(). */
 bool is_blank_char(int c)
 {

src/nano.c

@@ -3616,10 +3616,11 @@ int do_input(bool *meta_key, bool *func_key, bool *s_or_t, bool
 
     if (allow_funcs) {
 	/* If we got a character, and it isn't a shortcut, toggle, or
-	 * control character, it's a normal text character.  Display the
-	 * warning if we're in view mode, or add the character to the
-	 * input buffer if we're not. */
-	if (input != ERR && *s_or_t == FALSE && !is_cntrl_char(input)) {
+	 * ASCII control character, it's a normal text character.
+	 * Display the warning if we're in view mode, or add the
+	 * character to the input buffer if we're not. */
+	if (input != ERR && *s_or_t == FALSE &&
+		(!is_ascii_char(input) || !is_cntrl_char(input))) {
 	    if (ISSET(VIEW_MODE))
 		print_view_warning();
 	    else {

src/proto.h

@@ -157,6 +157,7 @@ bool is_alnum_mbchar(const char *c);
 #ifdef NANO_WIDE
 bool is_alnum_wchar(wchar_t wc);
 #endif
+bool is_ascii_char(int c);
 bool is_blank_char(int c);
 bool is_blank_mbchar(const char *c);
 #ifdef NANO_WIDE

src/winio.c

@@ -1676,7 +1676,12 @@ int do_statusbar_input(bool *meta_key, bool *func_key, bool *s_or_t,
     *s_or_t = have_shortcut;
 
     if (allow_funcs) {
-	if (input != ERR && *s_or_t == FALSE && !is_cntrl_char(input)) {
+	/* If we got a character, and it isn't a shortcut, toggle, or
+	 * ASCII control character, it's a normal text character.
+	 * Display the warning if we're in view mode, or add the
+	 * character to the input buffer if we're not. */
+	if (input != ERR && *s_or_t == FALSE &&
+		(!is_ascii_char(input) || !is_cntrl_char(input))) {
 	    /* If we're using restricted mode, the filename isn't blank,
 	     * and we're at the "Write File" prompt, disable text
 	     * input. */