File hexedit-Prevent-division-by-zero-on-empty-files... of Package hexedit

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File hexedit-Prevent-division-by-zero-on-empty-files.patch of Package hexedit

From 41981645134d201151f1cea9fd964d892166e866 Mon Sep 17 00:00:00 2001
From: Tobias Stoeckmann <tobias@stoeckmann.org>
Date: Sun, 4 Oct 2020 20:18:00 +0200
Subject: [PATCH] Prevent division by zero on empty files.

Git-commit: 41981645134d201151f1cea9fd964d892166e866
Upstream: accepted (expected in 1.15.1)

Hexedit crashes with a floating point exception when an empty file is
opened. This was introduced with percentage view in status line and
released with version 1.5.

How to reproduce:

$ touch empty
$ hexedit empty
---
 display.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/display.c b/display.c
index 9b4df91..a012b27 100644
--- a/display.c
+++ b/display.c
@@ -182,6 +182,7 @@ void exitCurses(void)
 
 void display(void)
 {
+  long long fsize;
   int i;
 
   for (i = 0; i < nbBytes; i += lineLength) {
@@ -204,8 +205,9 @@ void display(void)
   else if (edited) i = '*';
   else i = '-';
   printw("-%c%c  %s       --0x%llX", i, i, baseName, (long long) base + cursor);
-  if (MAX(fileSize, lastEditedLoc)) printw("/0x%llX", (long long) getfilesize());
-  printw("--%i%%", 100 * (base + cursor + getfilesize()/200) / getfilesize() );
+  fsize = getfilesize();
+  if (MAX(fileSize, lastEditedLoc)) printw("/0x%llX", fsize);
+  printw("--%i%%", fsize == 0 ? 0 : 100 * (base + cursor + fsize/200) / fsize );
   if (mode == bySector) printw("--sector %lld", (long long) ((base + cursor) / SECTOR_SIZE));
 
   move(cursor / lineLength, computeCursorXCurrentPos());
-- 
2.29.2

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File hexedit-Prevent-division-by-zero-on-empty-files.patch of Package hexedit

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