Fix #79922: Crash after multiple calls to xml_parser_free()

We must not call `zend_list_delete()` in resource closer functions
exposed to userland, because decreasing the refcount there

Fix #79922: Crash after multiple calls to xml_parser_free()

We must not call `zend_list_delete()` in resource closer functions
exposed to userland, because decreasing the refcount there leads to
use-after-free scenarios. In this case, commit 4a42fbb worked for
typical use-cases where `xml_parser_free()` has been called exactly
once for the resource, because there is an internal zval (`->index`)
referencing the same resource which already increased the refcount by
one. However, when `xml_parser_free()` is called multiple times on the
same XML parser resource, the resource would be freed prematurely.

Instead we forcefully close the resource in `xml_parser_free()`. We
also could decrease the refcount of the resource there, but that would
require to call `xml_parser_free()` which is somewhat uncommon, and
would be particularly bad wrt. PHP 8 where that function is a NOP, and
as such doesn't have to be called. So we do no longer increase the
refcount of the resource when copying it to the internal zval, and let
the usualy refcounting semantics take care of the resource destruction.

[1] <http://git.php.net/?p=php-src.git;a=commit;h=4a42fbbbc73aad7427aef5c89974d1833636e082>

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Add support for getting SKIP_TAGSTART and SKIP_WHITE options

When `XML_OPTION_SKIP_TAGSTART` and `XML_OPTION_SKIP_WHITE` had been
introduced[1], it had been overlooked to also support th

Add support for getting SKIP_TAGSTART and SKIP_WHITE options

When `XML_OPTION_SKIP_TAGSTART` and `XML_OPTION_SKIP_WHITE` had been
introduced[1], it had been overlooked to also support them for
`xml_parser_get_option()`. We catch up on that.

[1] <http://git.php.net/?p=php-src.git;a=commit;h=b57dc275950b228f2399990471c4f22b7d154c6c>

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Trim trailing whitespace in source code files

Trim trailing whitespace in source code files

Fix #30875: xml_parse_into_struct() does not resolve entities

Setting up an empty default handler is not only useless, but actually
harmful, since internal entity-references are not reso

Fix #30875: xml_parse_into_struct() does not resolve entities

Setting up an empty default handler is not only useless, but actually
harmful, since internal entity-references are not resolved anymore.
From the libexpat docs[1]:

| Setting the handler with this call has the side effect of
| turning off expansion of references to internally defined general
| entities. Instead these references are passed to the default
| handler.

[1] <https://www.xml.com/pub/1999/09/expat/reference.html#setdefhandler>

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Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
use

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.

In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.

This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.

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Use zend_string_release_ex() instread of zend_string_release() in places, where we sure about string persistence.

Reduce variable scope

Trailing whitespaces

Signed-off-by: Gabriel Caruso <carusogabriel34@gmail.com>

year++

year++

year++

Move constants into read-only data segment

Move constants into read-only data segment

Cleanup type conversion

Kill compiler warnings in ext/xml

Update copyright headers to 2017

Update copyright headers to 2017

Update copyright headers to 2017

remove TSRMLS_*

Move utf8_encode and utf8_decode to ext/standard

Fix various int size overflows.

Add function for detection of string zvals with length that does not fit
INT_MAX.

Improvements to fix #72714, suggested by nikic

Fix #72714: _xml_startElementHandler() segmentation fault

The issue is caused by an integer overflow when the `long` passed as
XML_OPTION_SKIP_TAGSTART is assigned to `xml_parser::toffse

Fix #72714: _xml_startElementHandler() segmentation fault

The issue is caused by an integer overflow when the `long` passed as
XML_OPTION_SKIP_TAGSTART is assigned to `xml_parser::toffset` which is
declared as `int`. We can simply work around this issue, by clipping
resulting negative values to 0 (and raising a notice in this case), because
the reasonable range for this value is certainly catered to by positive
`int`s.

However, there still remains the issue that `xml_parser::toffset` is later
added to `char *`s, which can cause OOB reads, so we make sure that the
upper bound never exceeds the strlen(). We eschew optimizing `SKIP_TAGSTART`
wrt. to the potentially duplicate strlen() call, because that code path is
unexpected anyway.

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Unused var