X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Ftty%2Fhardscroll.c;h=4ec168a0028ecebf06e02e5ea36088c691574f5f;hp=a270a27cb4d8fbf59e6410e3af327ad7c535405e;hb=7d3e03f12f3e179f5780f733fa5b78d981080d48;hpb=3a0d9d27e0cf115ff9dcc6163c251bccaa62bd7d

diff --git a/ncurses/tty/hardscroll.c b/ncurses/tty/hardscroll.c
index a270a27c..4ec168a0 100644
--- a/ncurses/tty/hardscroll.c
+++ b/ncurses/tty/hardscroll.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2010,2012 Free Software Foundation, Inc.              *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -147,7 +147,7 @@ AUTHOR
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: hardscroll.c,v 1.44 2009/10/24 21:57:38 tom Exp $")
+MODULE_ID("$Id: hardscroll.c,v 1.51 2012/10/17 09:01:10 tom Exp $")
 
 #if defined(SCROLLDEBUG) || defined(HASHDEBUG)
 
@@ -173,9 +173,9 @@ NCURSES_EXPORT_VAR (int *)
 # if USE_HASHMAP
 #  define oldnums(sp)   (sp)->_oldnum_list
 #  define OLDNUM(sp,n)	oldnums(sp)[n]
-# else				/* !USE_HASHMAP */
-#  define OLDNUM(sp,n)	sp->_newscr->_line[n].oldindex
-# endif				/* !USE_HASHMAP */
+# else /* !USE_HASHMAP */
+#  define OLDNUM(sp,n)	NewScreen(sp)->_line[n].oldindex
+# endif	/* !USE_HASHMAP */
 
 #define OLDNUM_SIZE(sp) (sp)->_oldnum_size
 
@@ -193,12 +193,20 @@ NCURSES_SP_NAME(_nc_scroll_optimize) (NCURSES_SP_DCL0)
 #if !defined(SCROLLDEBUG) && !defined(HASHDEBUG)
 #if USE_HASHMAP
     /* get enough storage */
-    if (OLDNUM_SIZE(SP_PARM) < screen_lines(SP_PARM)) {
-	int *new_oldnums = typeRealloc(int, screen_lines(SP_PARM), oldnums(SP_PARM));
+    assert(OLDNUM_SIZE(SP_PARM) >= 0);
+    assert(screen_lines(SP_PARM) > 0);
+    if ((oldnums(SP_PARM) == 0)
+	|| (OLDNUM_SIZE(SP_PARM) < screen_lines(SP_PARM))) {
+	int need_lines = ((OLDNUM_SIZE(SP_PARM) < screen_lines(SP_PARM))
+			  ? screen_lines(SP_PARM)
+			  : OLDNUM_SIZE(SP_PARM));
+	int *new_oldnums = typeRealloc(int,
+				       (size_t) need_lines,
+				       oldnums(SP_PARM));
 	if (!new_oldnums)
 	    return;
 	oldnums(SP_PARM) = new_oldnums;
-	OLDNUM_SIZE(SP_PARM) = screen_lines(SP_PARM);
+	OLDNUM_SIZE(SP_PARM) = need_lines;
     }
     /* calculate the indices */
     NCURSES_SP_NAME(_nc_hash_map) (NCURSES_SP_ARG);
@@ -294,14 +302,16 @@ NCURSES_SP_NAME(_nc_linedump) (NCURSES_SP_DCL0)
 {
     int n;
     char *buf = 0;
-    size_t want = (screen_lines(SP_PARM) + 1) * 4;
+    size_t want = ((size_t) screen_lines(SP_PARM) + 1) * 4;
 
     if ((buf = typeMalloc(char, want)) != 0) {
 
-	(void) strcpy(buf, "virt");
+	*buf = '\0';
 	for (n = 0; n < screen_lines(SP_PARM); n++)
-	    (void) sprintf(buf + strlen(buf), " %02d", OLDNUM(SP_PARM, n));
-	TR(TRACE_UPDATE | TRACE_MOVE, (buf));
+	    _nc_SPRINTF(buf + strlen(buf),
+			_nc_SLIMIT(want - strlen(buf))
+			" %02d", OLDNUM(SP_PARM, n));
+	TR(TRACE_UPDATE | TRACE_MOVE, ("virt %s", buf));
 	free(buf);
     }
 }