.. index:: single: http_text_helpers
.. _http_text_helpers/0:

.. rst-class:: right

**category**

``http_text_helpers``
=====================

Internal shared helpers for ASCII case normalization and HTTP optional whitespace trimming.

| **Availability:** 
|    ``logtalk_load(http_core(loader))``

| **Author:** Paulo Moura
| **Version:** 1:0:0
| **Date:** 2026-06-05

| **Compilation flags:**
|    ``static``


| **Uses:**
|    :ref:`list <list/0>`

| **Remarks:**
|    (none)

| **Inherited public predicates:**
|    (none)

.. contents::
   :local:
   :backlinks: top

Public predicates
-----------------

(no local declarations; see entity ancestors if any)

Protected predicates
--------------------

.. index:: ows_code/1
.. _http_text_helpers/0::ows_code/1:

``ows_code/1``
^^^^^^^^^^^^^^

Succeeds when the code is HTTP optional whitespace (SP or HTAB).

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``ows_code(Code)``
| **Mode and number of proofs:**
|    ``ows_code(+integer)`` - ``zero_or_one``


------------

.. index:: lowercase_ascii_codes/2
.. _http_text_helpers/0::lowercase_ascii_codes/2:

``lowercase_ascii_codes/2``
^^^^^^^^^^^^^^^^^^^^^^^^^^^

Converts uppercase ASCII letter codes in a list to lowercase, leaving all other codes unchanged.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``lowercase_ascii_codes(Codes,LowercaseCodes)``
| **Mode and number of proofs:**
|    ``lowercase_ascii_codes(+list(integer),-list(integer))`` - ``one``


------------

.. index:: uppercase_ascii_codes/2
.. _http_text_helpers/0::uppercase_ascii_codes/2:

``uppercase_ascii_codes/2``
^^^^^^^^^^^^^^^^^^^^^^^^^^^

Converts lowercase ASCII letter codes in a list to uppercase, leaving all other codes unchanged.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``uppercase_ascii_codes(Codes,UppercaseCodes)``
| **Mode and number of proofs:**
|    ``uppercase_ascii_codes(+list(integer),-list(integer))`` - ``one``


------------

.. index:: trim_trailing_ows_codes/2
.. _http_text_helpers/0::trim_trailing_ows_codes/2:

``trim_trailing_ows_codes/2``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Removes trailing HTTP optional whitespace codes from a list.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``trim_trailing_ows_codes(Codes,TrimmedCodes)``
| **Mode and number of proofs:**
|    ``trim_trailing_ows_codes(+list(integer),-list(integer))`` - ``one``


------------

.. index:: trim_ows_codes/2
.. _http_text_helpers/0::trim_ows_codes/2:

``trim_ows_codes/2``
^^^^^^^^^^^^^^^^^^^^

Removes leading and trailing HTTP optional whitespace codes from a list.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``trim_ows_codes(Codes,TrimmedCodes)``
| **Mode and number of proofs:**
|    ``trim_ows_codes(+list(integer),-list(integer))`` - ``one``


------------

Private predicates
------------------

(no local declarations; see entity ancestors if any)

Operators
---------

(none)