add multibyte/wide character support to input_tab(), so that we don't

end up with a string that contains only part of a multibyte character
during tab completion


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2560 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -57,6 +57,9 @@ CVS code -
 	- Rename variable next to nextdir to avoid confusion. (DLR)
   input_tab()
 	- Since list is a bool, assign it FALSE instead of 0. (DLR)
+	- Add multibyte/wide character support, so that we don't end up
+	  with a string that contains only part of a multibyte
+	  character during tab completion. (DLR)
   do_browser()
 	- Don't treat NANO_CANCEL_KEY as NANO_EXIT_KEY anymore, for
 	  consistency. (DLR)

src/files.c

@@ -2180,20 +2180,32 @@ char *input_tab(char *buf, size_t *place, bool *lastwastab, bool *list)
 	const char *lastslash = revstrstr(buf, "/", buf + *place);
 	size_t lastslash_len = (lastslash == NULL) ? 0 :
 		lastslash - buf + 1;
+	char *match1_mb = charalloc(mb_cur_max() + 1);
+	char *match2_mb = charalloc(mb_cur_max() + 1);
+	int match1_mb_len, match2_mb_len;
 
 	while (TRUE) {
 	    for (match = 1; match < num_matches; match++) {
-		if (matches[0][common_len] !=
-			matches[match][common_len])
+		match1_mb_len = parse_mbchar(matches[0] + common_len,
+			match1_mb, NULL, NULL);
+		match2_mb_len = parse_mbchar(matches[match] +
+			common_len, match2_mb, NULL, NULL);
+		match1_mb[match1_mb_len] = '\0';
+		match2_mb[match2_mb_len] = '\0';
+		if (strcmp(match1_mb, match2_mb) != 0)
 		    break;
 	    }
 
 	    if (match < num_matches || matches[0][common_len] == '\0')
 		break;
 
-	    common_len++;
+	    common_len += parse_mbchar(buf + common_len, NULL, NULL,
+		NULL);
 	}
 
+	free(match1_mb);
+	free(match2_mb);
+
 	mzero = charalloc(lastslash_len + common_len + 1);
 	sprintf(mzero, "%.*s%.*s", lastslash_len, buf, common_len,
 		matches[0]);