Add billable flag.

For backward-compatibility, this is actually a non-billable flag, so all
existing entries will be considered billable.  The flag is 'n', the UI
flag is 'B', the toggle function is "billable" and the default key binding is
'b'.

For now, this isn't useful for anything.

tts.c

@@ -160,6 +160,7 @@ typedef struct entry {
 		int	efl_invoiced:1;
 		int	efl_marked:1;
 		int	efl_deleted:1;
+		int	efl_nonbillable:1;
 	}			 en_flags;
 	TAILQ_ENTRY(entry)	 en_entries;
 } entry_t;
@@ -229,6 +230,7 @@ static void kup(void);
 static void kdown(void);
 static void ktoggle(void);
 static void kinvoiced(void);
+static void kbillable(void);
 static void keddesc(void);
 static void kedtime(void);
 static void ktoggleinv(void);
@@ -260,7 +262,8 @@ static function_t funcs[] = {
 	{ WIDE("delete"),	kmarkdel,	WIDE("delete the current entry") },
 	{ WIDE("undelete"),	kundel,		WIDE("undelete the current entry") },
 	{ WIDE("quit"),		kquit,		WIDE("exit TTS") },
-	{ WIDE("invoice"),	kinvoiced,	WIDE("set the current entry as invoiced") },
+	{ WIDE("invoice"),	kinvoiced,	WIDE("toggle current entry as invoiced") },
+	{ WIDE("billable"),	kbillable,	WIDE("toggle current entry as billable") },
 	{ WIDE("mark"),		kmark,		WIDE("mark the current entry") },
 	{ WIDE("unmarkall"),	kunmarkall,	WIDE("unmark all entries") },
 	{ WIDE("startstop"),	ktoggle,	WIDE("start or stop the timer") },
@@ -455,6 +458,7 @@ static time_t itime = 0;
 
 static int delete_advance = 1;
 static int mark_advance = 1;
+static int bill_advance = 0;
 
 #define VTYPE_INT	1
 #define VTYPE_BOOL	2
@@ -468,7 +472,8 @@ typedef struct variable {
 
 static variable_t variables[] = {
 	{ WIDE("delete_advance"),	VTYPE_BOOL,	&delete_advance },
-	{ WIDE("mark_advance"),		VTYPE_BOOL,	&mark_advance }
+	{ WIDE("mark_advance"),		VTYPE_BOOL,	&mark_advance },
+	{ WIDE("billable_advance"),	VTYPE_BOOL,	&bill_advance }
 };
 
 static variable_t	*find_variable(const WCHAR *name);
@@ -649,6 +654,7 @@ char		 rcfile[PATH_MAX + 1];
 	bind_key(WIDE("q"),		WIDE("quit"));
 	bind_key(WIDE("<CTRL-C>"),	WIDE("quit"));
 	bind_key(WIDE("i"),		WIDE("invoice"));
+	bind_key(WIDE("b"),		WIDE("billable"));
 	bind_key(WIDE("m"),		WIDE("mark"));
 	bind_key(WIDE("U"),		WIDE("unmarkall"));
 	bind_key(WIDE("<SPACE>"),	WIDE("startstop"));
@@ -1015,6 +1021,37 @@ int	 anymarked = 0;
 	}
 }
 
+void
+kbillable()
+{
+entry_t	*en;
+int	 anymarked = 0;
+
+	TAILQ_FOREACH(en, &entries, en_entries) {
+		if (!en->en_flags.efl_marked)
+			continue;
+		anymarked = 1;
+		en->en_flags.efl_nonbillable = !en->en_flags.efl_nonbillable;
+		en->en_flags.efl_marked = 0;
+	}
+
+	if (anymarked) {
+		save();
+		return;
+	}
+
+	if (!curent) {
+		drawstatus(WIDE("No entry selected."));
+		return;
+	}
+
+	curent->en_flags.efl_nonbillable = !curent->en_flags.efl_nonbillable;
+	save();
+
+	if (bill_advance)
+		cursadvance();
+}
+
 void
 keddesc()
 {
@@ -1885,6 +1922,11 @@ chtype	 oldbg;
 		else
 			*p++ = ' ';
 
+		if (!en->en_flags.efl_nonbillable)
+			*p++ = 'B';
+		else
+			*p++ = ' ';
+
 		if (en->en_flags.efl_deleted)
 			*p++ = 'D';
 		else
@@ -2046,7 +2088,7 @@ entry_t	*en;
 			continue;
 		}
 
-		if (SSCANF(line, WIDE("%lu %lu %9"FMT_L"[i-] %4095"FMT_L"[^\n]\n"),
+		if (SSCANF(line, WIDE("%lu %lu %9"FMT_L"[in-] %4095"FMT_L"[^\n]\n"),
 				&cre, &secs, flags, desc) != 4) {
 			errbox(WIDE("Can't read %s: invalid entry format"), statfile);
 			fclose(f);
@@ -2065,6 +2107,10 @@ entry_t	*en;
 				en->en_flags.efl_invoiced = 1;
 				break;
 
+			case 'n':
+				en->en_flags.efl_nonbillable = 1;
+				break;
+
 			default:
 				errbox(WIDE("Can't read %s: invalid flag"), statfile);
 				fclose(f);
@@ -2132,6 +2178,8 @@ entry_t	*en;
 		memset(flags, 0, sizeof(flags));
 		if (en->en_flags.efl_invoiced)
 			*fp++ = 'i';
+		if (en->en_flags.efl_nonbillable)
+			*fp++ = 'n';
 
 		n = en->en_secs;
 		if (en->en_started)

ttsrc.sample

@@ -5,11 +5,12 @@
 
 #### Interface options
 #
-# Whether to automatically advance the cursor when 'm'arking or 'd'eleting
+# Whether to automatically advance the cursor when 'm'arking, 'd'eleting
-# an entry.
+# or 'b'illing an entry.
 
 #set mark_advance 1
 #set delete_advance 1
+#set bill_advance 0
 
 #### Bindings
 #