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ext/bcmath: Improve documentation for BCMath (#4163)
- Use XIncludes to reduce duplications - Add error sections - Fix description of the scale parameter. - Wording improvements --------- Co-authored-by: Gina Peter Banyard <[email protected]> Co-authored-by: Niels Dossche <[email protected]>
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‎language-snippets.ent‎

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@@ -2149,11 +2149,17 @@ extensions in order to use these functions.</simpara>'>
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<!ENTITY sqlsafemode '<link xmlns="http://docbook.org/ns/docbook" linkend="ini.sql.safe-mode">SQL safe mode</link>'>
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<!-- BCMath Notes -->
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<!ENTITY bc.scale.description '<varlistentry xmlns="http://docbook.org/ns/docbook"><term>
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<parameter>scale</parameter></term><listitem><para>This optional parameter is used to set the number
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of digits after the decimal place in the result. If omitted, it will default to the scale set
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globally with the <function>bcscale</function> function, or fallback to <literal>0</literal> if
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this has not been set.</para></listitem></varlistentry>'>
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<!ENTITY bc.scale.description '<varlistentry xmlns="http://docbook.org/ns/docbook">
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<term><parameter>scale</parameter></term>
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<listitem>
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<simpara>
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This parameter is used to set the number of digits after the decimal place in the result.
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If &null;, it will default to the default scale set with <function>bcscale</function>,
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or fallback to the value of the
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<link linkend="ini.bcmath.scale"><literal>bcmath.scale</literal></link> INI directive.
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</simpara>
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</listitem>
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</varlistentry>'>
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<!-- CTYPE Notes -->
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<!ENTITY note.ctype.parameter.integer '<note xmlns="http://docbook.org/ns/docbook"><para>

‎reference/bc/functions/bcadd.xml‎

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@@ -51,7 +51,23 @@
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The sum of the two operands, as a string.
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</para>
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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<para>
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This function throws a <exceptionname>ValueError</exceptionname> in the following cases:
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<simplelist>
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<member>
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<parameter>num1</parameter> or <parameter>num2</parameter>
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is not a well-formed BCMath numeric string.
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</member>
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<member>
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<parameter>scale</parameter> is outside the valid range.
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</member>
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</simplelist>
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<informaltable>

‎reference/bc/functions/bcceil.xml‎

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@@ -39,6 +39,14 @@
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</simpara>
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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<simpara>
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This function throws a <exceptionname>ValueError</exceptionname> if
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<parameter>num</parameter> is not a well-formed BCMath numeric string.
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</simpara>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<example>

‎reference/bc/functions/bccomp.xml‎

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@@ -1,6 +1,6 @@
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<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.bccomp" xmlns="http://docbook.org/ns/docbook">
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<refentry xml:id="function.bccomp" xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refnamediv>
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<refname>bccomp</refname>
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<refpurpose>Compare two arbitrary precision numbers</refpurpose>
@@ -15,55 +15,26 @@
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<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>scale</parameter><initializer>&null;</initializer></methodparam>
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</methodsynopsis>
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<para>
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Compares the <parameter>num1</parameter> to the
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<parameter>num2</parameter> and returns the result as an
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integer.
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Compares <parameter>num1</parameter> to <parameter>num2</parameter>
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and returns the result of the comparison as an integer.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>num1</parameter></term>
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<listitem>
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<para>
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The left operand, as a string.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>num2</parameter></term>
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<listitem>
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<para>
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The right operand, as a string.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>scale</parameter></term>
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<listitem>
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<para>
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The optional <parameter>scale</parameter> parameter is used to set the
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number of digits after the decimal place which will be used in the
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comparison.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcadd')/db:refsect1[@role='parameters']/*)" />
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Returns 0 if the two operands are equal, 1 if the
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<parameter>num1</parameter> is larger than the
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<parameter>num2</parameter>, -1 otherwise.
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</para>
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<simpara>
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Returns <literal>0</literal> if both operands are equal,
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<literal>1</literal> if <parameter>num1</parameter> is greater than
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<parameter>num2</parameter>, <literal>-1</literal> otherwise.
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</simpara>
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</refsect1>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcadd')/db:refsect1[@role='errors'])" />
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<refsect1 role="changelog">
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&reftitle.changelog;
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<informaltable>

‎reference/bc/functions/bcdiv.xml‎

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@@ -1,6 +1,6 @@
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<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
3-
<refentry xml:id="function.bcdiv" xmlns="http://docbook.org/ns/docbook">
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<refentry xml:id="function.bcdiv" xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refnamediv>
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<refname>bcdiv</refname>
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<refpurpose>Divide two arbitrary precision numbers</refpurpose>
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<methodparam><type>string</type><parameter>num2</parameter></methodparam>
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<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>scale</parameter><initializer>&null;</initializer></methodparam>
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</methodsynopsis>
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<para>
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Divides the <parameter>num1</parameter> by the
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<parameter>num2</parameter>.
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</para>
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<simpara>
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Divides <parameter>num1</parameter> by <parameter>num2</parameter>.
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</simpara>
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</refsect1>
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<refsect1 role="parameters">
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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<para>
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This function throws a <exceptionname>ValueError</exceptionname> in the following cases:
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<simplelist>
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<member><parameter>num1</parameter> or <parameter>num2</parameter> is not a well-formed BCMath numeric string</member>
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<member><parameter>scale</parameter> is outside the valid range</member>
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</simplelist>
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</para>
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<!-- Include standard ValueErrors for num1, num2, and scale, this includes the title -->
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcadd')/db:refsect1[@role='errors']/*)" />
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<simpara>
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This function throws a <exceptionname>DivisionByZeroError</exceptionname> exception if <parameter>num2</parameter>
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is <literal>0</literal>.
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This function throws a <exceptionname>DivisionByZeroError</exceptionname>
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exception if <parameter>num2</parameter> is <literal>0</literal>.
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</simpara>
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</refsect1>
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<row>
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<entry>8.0.0</entry>
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<entry>
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Dividing by 0 now throws a <exceptionname>DivisionByZeroError</exceptionname> exception instead of returning null.
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Dividing by <literal>0</literal> now throws a
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<exceptionname>DivisionByZeroError</exceptionname> exception
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instead of returning &null;.
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</entry>
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</row>
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</tbody>

‎reference/bc/functions/bcdivmod.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.bcdivmod" xmlns="http://docbook.org/ns/docbook">
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<refentry xml:id="function.bcdivmod" xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refnamediv>
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<refname>bcdivmod</refname>
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<refpurpose>Get the quotient and modulus of an arbitrary precision number</refpurpose>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<variablelist>
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<varlistentry>
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<term><parameter>num1</parameter></term>
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<listitem>
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<simpara>
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The dividend, as a string.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>num2</parameter></term>
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<listitem>
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<simpara>
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The divisor, as a string.
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</simpara>
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</listitem>
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</varlistentry>
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&bc.scale.description;
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</variablelist>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcdiv')/db:refsect1[@role='parameters']/*)" />
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</refsect1>
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<refsect1 role="returnvalues">
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</simpara>
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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<para>
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This function throws a <exceptionname>ValueError</exceptionname> in the following cases:
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<simplelist>
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<member><parameter>num1</parameter> or <parameter>num2</parameter> is not a well-formed BCMath numeric string</member>
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<member><parameter>scale</parameter> is outside the valid range</member>
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</simplelist>
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</para>
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<simpara>
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This function throws a <exceptionname>DivisionByZeroError</exceptionname> exception if <parameter>num2</parameter>
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is <literal>0</literal>.
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</simpara>
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</refsect1>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcdiv')/db:refsect1[@role='errors'])" />
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<refsect1 role="examples">
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&reftitle.examples;

‎reference/bc/functions/bcfloor.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.bcfloor" xmlns="http://docbook.org/ns/docbook">
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<refentry xml:id="function.bcfloor" xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refnamediv>
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<refname>bcfloor</refname>
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<refpurpose>Round down arbitrary precision number</refpurpose>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<variablelist>
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<varlistentry>
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<term><parameter>num</parameter></term>
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<listitem>
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<simpara>
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The value to round.
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</simpara>
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</listitem>
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</varlistentry>
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</variablelist>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcceil')/db:refsect1[@role='parameters']/*)" />
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</refsect1>
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<refsect1 role="returnvalues">
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</simpara>
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</refsect1>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcceil')/db:refsect1[@role='errors'])" />
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<refsect1 role="examples">
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&reftitle.examples;
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<example>

‎reference/bc/functions/bcmod.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.bcmod" xmlns="http://docbook.org/ns/docbook">
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<refentry xml:id="function.bcmod" xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refnamediv>
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<refname>bcmod</refname>
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<refpurpose>Get modulus of an arbitrary precision number</refpurpose>
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<para>
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Get the remainder of dividing <parameter>num1</parameter> by
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<parameter>num2</parameter>.
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Unless <parameter>num2</parameter> is zero, the result has the same sign
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as <parameter>num1</parameter>.
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The result has the same sign as <parameter>num1</parameter>.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>num1</parameter></term>
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<listitem>
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<para>
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The dividend, as a string.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>num2</parameter></term>
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<listitem>
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<para>
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The divisor, as a string.
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</para>
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</listitem>
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</varlistentry>
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&bc.scale.description;
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</variablelist>
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</para>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcadd')/db:refsect1[@role='parameters']/*)" />
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</refsect1>
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<refsect1 role="returnvalues">
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</para>
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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<para>
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This function throws a <exceptionname>ValueError</exceptionname> in the following cases:
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<simplelist>
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<member><parameter>num1</parameter> or <parameter>num2</parameter> is not a well-formed BCMath numeric string</member>
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<member><parameter>scale</parameter> is outside the valid range</member>
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</simplelist>
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</para>
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<simpara>
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This function throws a <exceptionname>DivisionByZeroError</exceptionname> exception if <parameter>num2</parameter>
68-
is <literal>0</literal>.
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</simpara>
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</refsect1>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcdiv')/db:refsect1[@role='errors'])" />
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<refsect1 role="changelog"><!-- {{{ -->
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&reftitle.changelog;
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<row>
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<entry>8.0.0</entry>
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<entry>
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Dividing by 0 now throws a <exceptionname>DivisionByZeroError</exceptionname> exception instead of returning null.
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Dividing by <literal>0</literal> now throws a <exceptionname>DivisionByZeroError</exceptionname> exception instead of returning null.
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</entry>
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</row>
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<row>

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