round: Abolished the CPU rounding mode change and modified it to a different logic. (#13435)

* Removed changing CPU round mode and added processing to detect and correct errors.

Revert "Fixed to avoid incorrect optimization with llvm15.0.0"

This reverts commit 16d0394ef48ba91a4284280b98ac22d70dea6490.

Fixed to avoid incorrect optimization with llvm15.0.0

Extend the maximum precision round can handle by one digit

Closes #12222

Implement stackless internal function calls

Co-authored-by: Dmitry Stogov <dmitry@zend.com>

Closes GH-12461

Fix GH-12143: Optimize round

Fixed an error in the result due to "pre-rounding" of the round function.

"Pre-rounding" has been abolished and the method of comparing numbers has

Fix GH-12143: Optimize round

Fixed an error in the result due to "pre-rounding" of the round function.

"Pre-rounding" has been abolished and the method of comparing numbers has
been changed.

Closes GH-12268.

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RFC: Add 4 new rounding modes to round() function (#12056)

https://wiki.php.net/rfc/new_rounding_modes_to_round_function

Co-authored-by: Tim Düsterhus <tim@bastelstu.be>

number_format: cast large floats within range of int to int

This prevents loosing precision for numbers above 2^52.

Closes GH-12333

Fix GCC warning in math.c

abs: Make `value == ZEND_LONG_MIN` an unexpected branch

As suggested in GH-12286. This results in slightly better assembly in clang,
because the expected case will be handled by a forwar

abs: Make `value == ZEND_LONG_MIN` an unexpected branch

As suggested in GH-12286. This results in slightly better assembly in clang,
because the expected case will be handled by a forward jump that is not taken.

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round: Make `fractional == 0.5` an unexpected branch

This does indeed result in slightly better assembly for clang.

Unify type juggling in math.c (#12286)

- Consistently use a `switch()` with `EMPTY_SWITCH_DEFAULT_CASE();`
- Consistently use `zval_get_double()` for multi-type / non-double zvals

Unify type juggling in math.c (#12286)

- Consistently use a `switch()` with `EMPTY_SWITCH_DEFAULT_CASE();`
- Consistently use `zval_get_double()` for multi-type / non-double zvals
instead of casting manually.

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round(): Validate the rounding mode (#12252)

Reimplement `php_round_helper()` using `modf()` (#12220)

This change makes the implementation much easier to understand, by explicitly
handling the various cases.

It fixes round

Reimplement `php_round_helper()` using `modf()` (#12220)

This change makes the implementation much easier to understand, by explicitly
handling the various cases.

It fixes rounding for `0.49999999999999994`, because no loss of precision
happens by adding / subtracing `0.5` before turning the result into an integral
float. Instead the fractional parts are explicitly compared.

see GH-12143 (this fixes one of the reported cases)
Closes GH-12159 which was an alternative attempt to fix the rounding issue for
`0.49999999999999994`

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Prevent int overflow on $decimals in number_format

Closes GH-11714.
Closes GH-11649.

Prevent decimal int precision loss in number_format()

Closes GH-11584

Reorder list construction in the function php_intpow10 (#11683)

* Reorder array construction in the function
* Optimize function php_intlog10abs

number_format() Support rounding negative places

Closes GH-11487

Revert GH-10220

Cf. <https://github.com/php/php-src/pull/10220#issuecomment-1383739816>.

This reverts commit ecc880f491d66081298a16634629f149459706a9.
This reverts commit 588a07

Revert GH-10220

Cf. <https://github.com/php/php-src/pull/10220#issuecomment-1383739816>.

This reverts commit ecc880f491d66081298a16634629f149459706a9.
This reverts commit 588a07f7371ee2b5fac17de147926780e427fae6.
This reverts commit f377e15751d3aa48b69cd9bcc366ede7803d511f.
This reverts commit b4ba16fe189b109144aff669e11d81365160104b.
This reverts commit 694ec1deea36e366b28b6349a52be49824e1a1a8.
This reverts commit 6b34de8eba9f66882ae16e6073af28783670ac53.
This reverts commit aa1cd02a4367834026ea2205ea13a2f904455aa1.
This reverts commit 308fd311ea6fcf3094b448df7f2b264f08e4fe4f.
This reverts commit 16203b53e1822a37b6ba6f2ab198bb435d05fdad.
This reverts commit 738fb5ca5412f5e833a7fab82b11519e635a3357.
This reverts commit 9fdbefacd3c382d731aa175b7bdc002ec9cb2b30.
This reverts commit cd4a7c1d90562ebb5f89caf94d00d579631b9fbe.
This reverts commit 928685eba2b2f0ded90e7f78fd806ea164002f6e.
This reverts commit 01e5ffc85cd4357fd7b5b7ceefa29f2d10ca26b7.

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ext/{standard,json,random,...}: add missing includes

Update http->https in license (#6945)

1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as

Update http->https in license (#6945)

1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as 3.0 states "php 5.1.1, 4.1.1, and earlier".
3. In some license comments is "at through the world-wide-web" while most is without "at", so deleted.
4. fixed indentation in some files before |

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Introduce pseudo-keyword ZEND_FALLTHROUGH

And use it instead of comments

Promote a few remaining errors in ext/standard

Closes GH-6110

decbin/decoct/dechex optimization.

Add "const". Move constant strings to read-only memory.