tweaks: get rid of a bunch of annoying casts, and thus condense the code

src/cut.c

@@ -434,8 +434,7 @@ void cut_marked_region(void)
 	linestruct *top, *bot;
 	size_t top_x, bot_x;
 
-	get_region((const linestruct **)&top, &top_x,
-				(const linestruct **)&bot, &bot_x);
+	get_region(&top, &top_x, &bot, &bot_x);
 
 	extract_segment(top, top_x, bot, bot_x);
 

src/files.c

@@ -2026,8 +2026,7 @@ bool write_marked_file(const char *name, FILE *stream, bool tmp,
 	size_t top_x, bot_x;
 
 	/* Partition the buffer so that it contains only the marked text. */
-	get_region((const linestruct **)&top, &top_x,
-				(const linestruct **)&bot, &bot_x);
+	get_region(&top, &top_x, &bot, &bot_x);
 	partition_buffer(top, top_x, bot, bot_x);
 
 	/* If we are using a magic line, and the last line of the partition

src/proto.h

@@ -573,9 +573,8 @@ void remove_magicline(void);
 #endif
 #ifndef NANO_TINY
 bool mark_is_before_cursor(void);
-void get_region(const linestruct **top, size_t *top_x,
-		const linestruct **bot, size_t *bot_x);
-void get_range(const linestruct **top, const linestruct **bot);
+void get_region(linestruct **top, size_t *top_x, linestruct **bot, size_t *bot_x);
+void get_range(linestruct **top, linestruct **bot);
 #endif
 size_t get_totsize(const linestruct *begin, const linestruct *end);
 #ifndef NANO_TINY

src/search.c

@@ -522,8 +522,7 @@ ssize_t do_replace_loop(const char *needle, bool whole_word_only,
 
 	/* If the mark is on, frame the region, and turn the mark off. */
 	if (openfile->mark) {
-		get_region((const linestruct **)&top, &top_x,
-					(const linestruct **)&bot, &bot_x);
+		get_region(&top, &top_x, &bot, &bot_x);
 		openfile->mark = NULL;
 		modus = INREGION;
 

src/text.c

@@ -120,7 +120,7 @@ void do_indent(void)
 	linestruct *top, *bot, *line;
 
 	/* Use either all the marked lines or just the current line. */
-	get_range((const linestruct **)&top, (const linestruct **)&bot);
+	get_range(&top, &bot);
 
 	/* Skip any leading empty lines. */
 	while (top != bot->next && top->data[0] == '\0')
@@ -241,7 +241,7 @@ void do_unindent(void)
 	linestruct *top, *bot, *line;
 
 	/* Use either all the marked lines or just the current line. */
-	get_range((const linestruct **)&top, (const linestruct **)&bot);
+	get_range(&top, &bot);
 
 	/* Skip any leading lines that cannot be unindented. */
 	while (top != bot->next && length_of_white(top->data) == 0)
@@ -386,7 +386,7 @@ void do_comment(void)
 #endif
 
 	/* Determine which lines to work on. */
-	get_range((const linestruct **)&top, (const linestruct **)&bot);
+	get_range(&top, &bot);
 
 	/* If only the magic line is selected, don't do anything. */
 	if (top == bot && bot == openfile->filebot && !ISSET(NO_NEWLINES)) {
@@ -1744,8 +1744,7 @@ void do_justify(bool full_justify)
 		size_t quot_len, fore_len, other_quot_len, other_white_len;
 		linestruct *sampleline;
 
-		get_region((const linestruct **)&startline, &start_x,
-					(const linestruct **)&endline, &end_x);
+		get_region(&startline, &start_x, &endline, &end_x);
 
 		/* When the marked region is empty, do nothing. */
 		if (startline == endline && start_x == end_x) {
@@ -2034,8 +2033,7 @@ bool fix_spello(const char *word)
 #ifndef NANO_TINY
 	/* If the mark is on, start at the beginning of the marked region. */
 	if (openfile->mark) {
-		get_region((const linestruct **)&top, &top_x,
-					(const linestruct **)&bot, &bot_x);
+		get_region(&top, &top_x, &bot, &bot_x);
 		/* If the region is marked normally, swap the end points, so that
 		 * (current, current_x) (where searching starts) is at the top. */
 		if (right_side_up) {
@@ -2913,8 +2911,7 @@ void do_wordlinechar_count(void)
 	/* If the mark is on, partition the buffer so that it
 	 * contains only the marked text, and turn the mark off. */
 	if (openfile->mark) {
-		get_region((const linestruct **)&top, &top_x,
-					(const linestruct **)&bot, &bot_x);
+		get_region(&top, &top_x, &bot, &bot_x);
 		partition_buffer(top, top_x, bot, bot_x);
 	}
 

src/utils.c

@@ -460,8 +460,7 @@ bool mark_is_before_cursor(void)
 
 /* Return in (top, top_x) and (bot, bot_x) the start and end "coordinates"
  * of the marked region. */
-void get_region(const linestruct **top, size_t *top_x,
-				const linestruct **bot, size_t *bot_x)
+void get_region(linestruct **top, size_t *top_x, linestruct **bot, size_t *bot_x)
 {
 	if (mark_is_before_cursor()) {
 		*top = openfile->mark;
@@ -479,7 +478,7 @@ void get_region(const linestruct **top, size_t *top_x,
 /* Get the set of lines to work on -- either just the current line, or the
  * first to last lines of the marked region.  When the cursor (or mark) is
  * at the start of the last line of the region, exclude that line. */
-void get_range(const linestruct **top, const linestruct **bot)
+void get_range(linestruct **top, linestruct **bot)
 {
 	if (!openfile->mark) {
 		*top = openfile->current;

src/winio.c

@@ -2677,7 +2677,7 @@ void draw_row(int row, const char *converted, linestruct *line, size_t from_col)
 						line->lineno <= openfile->current->lineno) ||
 						(line->lineno <= openfile->mark->lineno &&
 						line->lineno >= openfile->current->lineno))) {
-		const linestruct *top, *bot;
+		linestruct *top, *bot;
 			/* The lines where the marked region begins and ends. */
 		size_t top_x, bot_x;
 			/* The x positions where the marked region begins and ends. */