2009-08-13 Chris Allegretta <chrisa@asty.org>

	* New global flag implementation courtesy of Adam Wysocki <gophi@arcabit.pl>, allows
 	  previous undo flag to be implemented consistent with other flags.



git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4400 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2009-08-13 Chris Allegretta <chrisa@asty.org>
+	* New global flag implementation courtesy of Adam Wysocki <gophi@arcabit.pl>, allows
+ 	  previous undo flag to be implemented consistent with other flags.
+
 GNU nano 2.1.10 - 2009.07.28
+
 2009-07-27 Chris Allegretta <chrisa@asty.org>
 	* text.c (undo_cut, redo_cut): Don't actually try and undo/redo an empty cut, i.e. the magicline. 
 	  Fixes crash on cutting last line discovered by Eitan Adler <eitanadlerlist@gmail.com>.

src/global.c

@@ -36,9 +36,6 @@ sigjmp_buf jump_buf;
 bool jump_buf_main = FALSE;
 	/* Have we set jump_buf so that we return to main() after a
 	 * SIGWINCH? */
-bool use_undo = FALSE;
-	/* Are we actually using the undo code - disabled by default
-	   as the undo code is too unstable */
 #endif
 
 #ifndef DISABLE_WRAPJUSTIFY
@@ -55,7 +52,7 @@ char *last_search = NULL;
 char *last_replace = NULL;
 	/* The last replacement string we searched for. */
 
-long flags = 0;
+unsigned flags[4] = {0, 0, 0, 0};
 	/* Our flag containing the states of all global options. */
 WINDOW *topwin;
 	/* The top portion of the window, where we display the version
@@ -781,7 +778,7 @@ void shortcut_init(bool unjustify)
     add_to_funcs(DO_UNINDENT, MMAIN, N_("Unindent Text"),
 	IFSCHELP(nano_unindent_msg), FALSE, NOVIEW);
 
-    if (use_undo) {
+    if (ISSET(UNDOABLE)) {
 	add_to_funcs(DO_UNDO, MMAIN, N_("Undo"),
 	    IFSCHELP(nano_undo_msg), FALSE, NOVIEW);
 
@@ -1069,7 +1066,7 @@ void shortcut_init(bool unjustify)
     add_to_sclist(MMAIN, "M-6", DO_COPY_TEXT, 0, TRUE);
     add_to_sclist(MMAIN, "M-}", DO_INDENT_VOID, 0, TRUE);
     add_to_sclist(MMAIN, "M-{", DO_UNINDENT, 0, TRUE);
-    if (use_undo) {
+    if (ISSET(UNDOABLE)) {
 	add_to_sclist(MMAIN, "M-U", DO_UNDO, 0, TRUE);
  	add_to_sclist(MMAIN, "M-E", DO_REDO, 0, TRUE);
     }

src/nano.c

@@ -2213,7 +2213,7 @@ int main(int argc, char **argv)
 		break;
 #ifndef NANO_TINY
 	    case 'u':
-		use_undo = TRUE;
+		SET(UNDOABLE);
 		break;
 #endif
 	    case 'v':
@@ -2277,7 +2277,10 @@ int main(int argc, char **argv)
 	char *alt_speller_cpy = alt_speller;
 #endif
 	ssize_t tabsize_cpy = tabsize;
-	long flags_cpy = flags;
+	unsigned flags_cpy[sizeof(flags) / sizeof(flags[0])];
+	size_t i;
+
+	memcpy(flags_cpy, flags, sizeof(flags_cpy));
 
 #ifndef DISABLE_OPERATINGDIR
 	operating_dir = NULL;
@@ -2329,7 +2332,9 @@ int main(int argc, char **argv)
 #endif
 	if (tabsize_cpy != -1)
 	    tabsize = tabsize_cpy;
-	flags |= flags_cpy;
+
+	for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++)
+	    flags[i] |= flags_cpy[i];
     }
 #ifdef DISABLE_ROOTWRAPPING
     /* If we don't have any rcfiles, --disable-wrapping-as-root is used,

src/nano.h

@@ -55,10 +55,13 @@
 #endif
 
 /* Macros for flags. */
-#define SET(bit) flags |= bit
-#define UNSET(bit) flags &= ~bit
-#define ISSET(bit) ((flags & bit) != 0)
-#define TOGGLE(bit) flags ^= bit
+#define FLAGOFF(flag) ((flag) / (sizeof(unsigned) * 8))
+#define FLAGMASK(flag) (1 << ((flag) % (sizeof(unsigned) * 8)))
+#define FLAGS(flag) flags[FLAGOFF(flag)]
+#define SET(flag) FLAGS(flag) |= FLAGMASK(flag)
+#define UNSET(flag) FLAGS(flag) &= ~FLAGMASK(flag)
+#define ISSET(flag) ((FLAGS(flag) & FLAGMASK(flag)) != 0)
+#define TOGGLE(flag) FLAGS(flag) ^= FLAGMASK(flag)
 
 /* Macros for character allocation and more. */
 #define charalloc(howmuch) (char *)nmalloc((howmuch) * sizeof(char))
@@ -450,40 +453,44 @@ typedef struct subnfunc {
 } subnfunc;
 
 
-/* Bitwise flags so that we can save space (or, more correctly, not
- * waste it). */
-#define CASE_SENSITIVE			(1<<0)
-#define CONST_UPDATE			(1<<1)
-#define NO_HELP				(1<<2)
-#define NOFOLLOW_SYMLINKS		(1<<3)
-#define SUSPEND				(1<<4)
-#define NO_WRAP				(1<<5)
-#define AUTOINDENT			(1<<6)
-#define VIEW_MODE			(1<<7)
-#define USE_MOUSE			(1<<8)
-#define USE_REGEXP			(1<<9)
-#define TEMP_FILE			(1<<10)
-#define CUT_TO_END			(1<<11)
-#define BACKWARDS_SEARCH		(1<<12)
-#define MULTIBUFFER			(1<<13)
-#define SMOOTH_SCROLL			(1<<14)
-#define REBIND_DELETE			(1<<15)
-#define REBIND_KEYPAD			(1<<16)
-#define NO_CONVERT			(1<<17)
-#define BACKUP_FILE			(1<<18)
-#define NO_COLOR_SYNTAX			(1<<19)
-#define PRESERVE			(1<<20)
-#define HISTORYLOG			(1<<21)
-#define RESTRICTED			(1<<22)
-#define SMART_HOME			(1<<23)
-#define WHITESPACE_DISPLAY		(1<<24)
-#define MORE_SPACE			(1<<25)
-#define TABS_TO_SPACES			(1<<26)
-#define QUICK_BLANK			(1<<27)
-#define WORD_BOUNDS			(1<<28)
-#define NO_NEWLINES			(1<<29)
-#define BOLD_TEXT			(1<<30)
-#define QUIET				(1<<31)
+/* Enumeration to be used in flags table. See FLAGBIT and FLAGOFF 
+ * definitions. */
+enum
+{
+    CASE_SENSITIVE,
+    CONST_UPDATE,
+    NO_HELP,
+    NOFOLLOW_SYMLINKS,
+    SUSPEND,
+    NO_WRAP,
+    AUTOINDENT,
+    VIEW_MODE,
+    USE_MOUSE,
+    USE_REGEXP,
+    TEMP_FILE,
+    CUT_TO_END,
+    BACKWARDS_SEARCH,
+    MULTIBUFFER,
+    SMOOTH_SCROLL,
+    REBIND_DELETE,
+    REBIND_KEYPAD,
+    NO_CONVERT,
+    BACKUP_FILE,
+    NO_COLOR_SYNTAX,
+    PRESERVE,
+    HISTORYLOG,
+    RESTRICTED,
+    SMART_HOME,
+    WHITESPACE_DISPLAY,
+    MORE_SPACE,
+    TABS_TO_SPACES,
+    QUICK_BLANK,
+    WORD_BOUNDS,
+    NO_NEWLINES,
+    BOLD_TEXT,
+    QUIET,
+    UNDOABLE,
+};
 
 /* Flags for which menus in which a given function should be present */
 #define MMAIN				(1<<0)

src/proto.h

@@ -41,7 +41,7 @@ extern ssize_t wrap_at;
 extern char *last_search;
 extern char *last_replace;
 
-extern long flags;
+extern unsigned flags[4];
 extern WINDOW *topwin;
 extern WINDOW *edit;
 extern WINDOW *bottomwin;

src/rcfile.c

@@ -909,15 +909,6 @@ void parse_rcfile(FILE *rcstream
 	option = ptr;
 	ptr = parse_next_word(ptr);
 
-#ifndef NANO_TINY
-	/* FIXME: Hack which should go away ASAP */
-	if (strcasecmp(option,  "undo") == 0) {
-	    use_undo = TRUE;
-	    shortcut_init(0);
-	    continue;
-	}
-#endif
-
 	for (i = 0; rcopts[i].name != NULL; i++) {
 	    if (strcasecmp(option, rcopts[i].name) == 0) {
 #ifdef DEBUG

src/text.c

@@ -837,7 +837,7 @@ void add_undo(undo_type current_action)
     static undo *last_cutu = NULL; /* Last thing we cut to set up the undo for uncut */
     ssize_t wrap_loc;	/* For calculating split beginning */
 
-    if (!use_undo)
+    if (!ISSET(UNDOABLE))
 	return;
 
     /* Ugh, if we were called while cutting not-to-end, non-marked and on the same lineno,
@@ -962,7 +962,7 @@ void update_undo(undo_type action)
     int len = 0;
     openfilestruct *fs = openfile;
 
-    if (!use_undo)
+    if (!ISSET(UNDOABLE))
 	return;
 
 #ifdef DEBUG