gd imageloadfont, verify error while reading header

[BlackIkeEagle]

when reading the header verify we get an error when the header is
invalid.

Signed-off-by: BlackEagle ike.devolder@gmail.com

User Group: PHP-WVL & PHPGent #PHPTestFest

[petk]

Thank you for the pull request. Maybe this one should be joined together into this file now also:
php/php-src@fee9f3a

I'll recheck soon.

[BlackIkeEagle]

@petk do I need to take some action, or do you come back on this?

[petk]

Hello, I was thinking here if it's possible to join this test with this file:
https://github.com/php/php-src/blob/master/ext/gd/tests/imageloadfont_end_of_file_while_reading_header.phpt

Can you please open a pull request on the php-src directly and add the part that is here in that file?

Basically, something like this I think is ok:

--TEST--
imageloadfont() "End of file while reading header"
--CREDITS--
Ike Devolder <ike.devolder@gmail.com>
User Group: PHP-WVL & PHPGent #PHPTestFest
--SKIPIF--
<?php
if (!extension_loaded('gd')) die("skip gd extension not available\n");
?>
--FILE--
<?php
$filename = dirname(__FILE__) .  '/font.gdf';

// End of file while reading header
$bin = "\x41\x41\x41\x41\x00\x00\x00\x00\x00\x00";
$fp = fopen($filename, 'wb');
fwrite($fp, $bin);
fclose($fp);
$font = imageloadfont($filename);

// Error while reading header
$bin = "\xe0\x00\x00\x00\x20\x00\x00\x00\x06\x00\x00\x00\x0a\x00\x00";
$fp = fopen($filename, 'wb');
fwrite($fp, $bin);
fclose($fp);
$font = imageloadfont($filename);
?>
--CLEAN--
<?php
unlink(__DIR__.'/font.gdf');
?>
--EXPECTF--
Warning: imageloadfont(): End of file while reading header in %s on line %d

Warning: imageloadfont(): End of file while reading header in %s on line %d

[petk]

I've applied the joined tests via php/php-src@a8336fb to PHP-7.4 and master branches.

Thank you @BlackIkeEagle for the pull request 🎉