view src/beval.h @ 34309:d7cfd8fb1d75 v9.1.0089

patch 9.1.0089: qsort() comparison functions should be transitive Commit: https://github.com/vim/vim/commit/e06e43766500ecb4cd1031fa16cf9cbebdb222c1 Author: Christian Brabandt <cb@256bit.org> Date: Fri Feb 9 19:39:14 2024 +0100 patch 9.1.0089: qsort() comparison functions should be transitive Problem: qsort() comparison functions should be transitive Solution: Do not subtract values, but rather use explicit comparisons Improve qsort() comparison functions There has been a recent report on qsort() causing out-of-bounds read & write in glibc for non transitive comparison functions https://www.qualys.com/2024/01/30/qsort.txt Even so the bug is in glibc's implementation of the qsort() algorithm, it's bad style to just use substraction for the comparison functions, which may cause overflow issues and as hinted at in OpenBSD's manual page for qsort(): "It is almost always an error to use subtraction to compute the return value of the comparison function." So check the qsort() comparison functions and change them to be safe. closes: #13980 Signed-off-by: Christian Brabandt <cb@256bit.org>
author Christian Brabandt <cb@256bit.org>
date Fri, 09 Feb 2024 19:45:06 +0100
parents 352701a626ed
children
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/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *			Visual Workshop integration by Gordon Prieur
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

#if !defined(BEVAL__H) && (defined(FEAT_BEVAL) || defined(PROTO))
#define BEVAL__H

#ifdef FEAT_GUI_GTK
# ifdef USE_GTK3
#  include <gtk/gtk.h>
# else
#  include <gtk/gtkwidget.h>
# endif
#else
# if defined(FEAT_GUI_X11)
#  include <X11/Intrinsic.h>
# endif
#endif

typedef enum
{
    ShS_NEUTRAL,			// nothing showing or pending
    ShS_PENDING,			// data requested from debugger
    ShS_UPDATE_PENDING,			// switching information displayed
    ShS_SHOWING				// the balloon is being displayed
} BeState;

typedef struct BalloonEvalStruct
{
#ifdef FEAT_BEVAL_GUI
# ifdef FEAT_GUI_GTK
    GtkWidget		*target;	// widget we are monitoring
    GtkWidget		*balloonShell;
    GtkWidget		*balloonLabel;
    unsigned int	timerID;	// timer for run
    BeState		showState;	// tells us what's currently going on
    int			x;
    int			y;
    unsigned int	state;		// Button/Modifier key state
# else
#  if !defined(FEAT_GUI_MSWIN)
    Widget		target;		// widget we are monitoring
    Widget		balloonShell;
    Widget		balloonLabel;
    XtIntervalId	timerID;	// timer for run
    BeState		showState;	// tells us what's currently going on
    XtAppContext	appContext;	// used in event handler
    Position		x;
    Position		y;
    Position		x_root;
    Position		y_root;
    int			state;		// Button/Modifier key state
#  else
    HWND		target;
    HWND		balloon;
    int			x;
    int			y;
    BeState		showState;	// tells us what's currently going on
#  endif
# endif
# if !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MSWIN)
    Dimension		screen_width;	// screen width in pixels
    Dimension		screen_height;	// screen height in pixels
# endif
    void		(*msgCB)(struct BalloonEvalStruct *, int);
    void		*clientData;	// For callback
#endif

    int			ts;		// tabstop setting for this buffer
#ifdef FEAT_VARTABS
    int			*vts;		// vartabstop setting for this buffer
#endif
    char_u		*msg;		// allocated: current text
#ifdef FEAT_GUI_MSWIN
    void		*tofree;
#endif
#ifdef FEAT_GUI_HAIKU
    int			x;
    int			y;
#endif
} BalloonEval;

#define EVAL_OFFSET_X 15 // displacement of beval topleft corner from pointer
#define EVAL_OFFSET_Y 10

#ifdef FEAT_BEVAL_GUI
# include "gui_beval.pro"
#endif

#endif // BEVAL__H and FEAT_BEVAL_GUI