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437 lines
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<title>Version Numbers</title>
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<meta name="viewport" content="width=device-width initial-scale=1">
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<body>
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<nav role="navigation">
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<h1><a href="../webs.html">Sources</a></h1>
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<ul>
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<li><a href="../inweb/index.html">inweb</a></li>
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</ul>
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<h2>Foundation</h2>
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<ul>
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<li><a href="../foundation-module/index.html">foundation-module</a></li>
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<li><a href="../foundation-test/index.html">foundation-test</a></li>
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<main role="main">
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<!--Weave of 'Version Numbers' generated by 7-->
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<ul class="crumbs"><li><a href="../webs.html">Source</a></li><li><a href="index.html">foundation</a></li><li><a href="index.html#7">Chapter 7: Semantic Versioning</a></li><li><b>Version Numbers</b></li></ul><p class="purpose">Semantic version numbers such as 3.7.1.</p>
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<ul class="toc"><li><a href="#SP1">§1. Standard adoption</a></li><li><a href="#SP5">§5. Printing and parsing</a></li><li><a href="#SP8">§8. Precendence</a></li><li><a href="#SP11">§11. Trichotomy</a></li></ul><hr class="tocbar">
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<p class="inwebparagraph"><a id="SP1"></a><b>§1. Standard adoption. </b>The Semantic Version Number standard, semver 2.0.0, provides a strict set
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of rules for the format and meaning of version numbers: see <code class="display"><span class="extract">https://semver.org</span></code>.
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</p>
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<p class="inwebparagraph">Prior to the standard most version numbers in computing usage looked like
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dot-divided runs of non-negative integers: for example, 4, 7.1, and 0.2.3.
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The standard now requires exactly three: major, minor and patch. It's
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therefore formally incorrect to have a version 2, or a version 2.3. We will
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not be so strict on the textual form, which we will allow to be abbreviated.
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Thus:
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</p>
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<p class="inwebparagraph"></p>
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<ul class="items"><li>(a) The text <code class="display"><span class="extract">6.4.7</span></code> is understood to mean 6.4.7 and printed back as <code class="display"><span class="extract">6.4.7</span></code>
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</li><li>(b) The text <code class="display"><span class="extract">6</span></code> is understood to mean 6.0.0 and printed back as <code class="display"><span class="extract">6</span></code>
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</li><li>(c) The text <code class="display"><span class="extract">6.1</span></code> is understood to mean 6.1.0 and printed back as <code class="display"><span class="extract">6.1</span></code>
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</li><li>(d) The text <code class="display"><span class="extract">6.1.0</span></code> is understood to mean 6.1.0 and printed back as <code class="display"><span class="extract">6.1.0</span></code>
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</li></ul>
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<p class="inwebparagraph">Similarly, the absence of a version number (called "null" below) will be
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understood to mean 0.0.0, but will be distinguished from the explicit choice
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to number something as 0.0.0.
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</p>
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<p class="inwebparagraph"><a id="SP2"></a><b>§2. </b>A complication is that Inform 7 extensions have for many years allowed two
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forms of version number: either just <code class="display"><span class="extract">N</span></code>, which fits the scheme above, or
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<code class="display"><span class="extract">N/DDDDDD</span></code>, which does not. This is a format which was chosen for sentimental
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reasons: IF enthusiasts know it well from the banner text of the Infocom
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titles of the 1980s. This story file, for instance, was compiled at the
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time of the Reykjavik summit between Presidents Gorbachev and Reagan:
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</p>
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<pre class="display">
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<span class="plain">Moonmist</span>
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<span class="plain">Infocom interactive fiction - a mystery story</span>
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<span class="plain">Copyright (c) 1986 by Infocom, Inc. All rights reserved.</span>
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<span class="plain">Moonmist is a trademark of Infocom, Inc.</span>
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<span class="plain">Release number 9 / Serial number 861022</span>
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</pre>
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<p class="inwebparagraph">Story file collectors customarily abbreviate this in catalogues to <code class="display"><span class="extract">9/861022</span></code>.
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</p>
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<p class="inwebparagraph">We will therefore allow this notation, and convert it silently each way.
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<code class="display"><span class="extract">N/DDDDDD</span></code> is equivalent to <code class="display"><span class="extract">N.DDDDDD</span></code>. Thus, <code class="display"><span class="extract">9/861022</span></code> means 9.861022.0 in
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semver precedence order.
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</p>
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<p class="inwebparagraph">In all non-textual respects, and in particular on precedence rules, we follow
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the standard exactly. The only reason we allow these abbreviations is because
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we don't want to force Inform extension writers to type "Version 3.4.1 of
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Such-and-Such by Me begins here", and so on: it would break all existing
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extensions, for one thing, and it looks unfriendly.
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</p>
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<p class="inwebparagraph"><a id="SP3"></a><b>§3. </b>In the array below, unspecified numbers are stored as <code class="display"><span class="extract">-1</span></code>. The three
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components are otherwise required to be non-negative integers.
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</p>
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<p class="inwebparagraph">Semver allows for more elaborate forms: for example <code class="display"><span class="extract">3.1.41-alpha.72.zeta+6Q45</span></code>
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would mean 3.1.41 but with prerelease versioning <code class="display"><span class="extract">alpha.72.zeta</span></code> and build
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metadata <code class="display"><span class="extract">6Q45</span></code>. The <code class="display"><span class="extract">prerelease_segments</span></code> list for this would be a list of
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three texts: <code class="display"><span class="extract">alpha</span></code>, <code class="display"><span class="extract">72</span></code>, <code class="display"><span class="extract">zeta</span></code>.
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">SEMVER_NUMBER_DEPTH</span><span class="plain"> </span><span class="constant">3</span><span class="plain"> </span><span class="comment"> major, minor, patch</span>
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</pre>
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<pre class="display">
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">semantic_version_number</span><span class="plain"> {</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">version_numbers</span><span class="plain">[</span><span class="constant">SEMVER_NUMBER_DEPTH</span><span class="plain">];</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">linked_list</span><span class="plain"> *</span><span class="identifier">prerelease_segments</span><span class="plain">; </span><span class="comment"> of <code class="display"><span class="extract">text_stream</span></code></span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">build_metadata</span><span class="plain">;</span>
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<span class="plain">} </span><span class="reserved">semantic_version_number</span><span class="plain">;</span>
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">semantic_version_number_holder</span><span class="plain"> {</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">version</span><span class="plain">;</span>
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<span class="constant">MEMORY_MANAGEMENT</span>
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<span class="plain">} </span><span class="reserved">semantic_version_number_holder</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The structure semantic_version_number is accessed in 7/vnr and here.</p>
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<p class="endnote">The structure semantic_version_number_holder is private to this section.</p>
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<p class="inwebparagraph"><a id="SP4"></a><b>§4. </b>All invalid strings of numbers — i.e., breaking the above rules — are
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called "null" versions, and can never be valid as the version of anything.
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Instead they are used to represent the absence of a version number.
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(In particular, a string of <code class="display"><span class="extract">-1</span></code>s is null.)
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</p>
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<pre class="display">
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<span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
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<span class="plain">#</span><span class="identifier">pragma</span><span class="plain"> </span><span class="identifier">clang</span><span class="plain"> </span><span class="identifier">diagnostic</span><span class="plain"> </span><span class="identifier">push</span>
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<span class="plain">#</span><span class="identifier">pragma</span><span class="plain"> </span><span class="identifier">clang</span><span class="plain"> </span><span class="identifier">diagnostic</span><span class="plain"> </span><span class="identifier">ignored</span><span class="plain"> </span><span class="string">"-Wconditional-uninitialized"</span>
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<span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V</span><span class="plain">;</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="constant">SEMVER_NUMBER_DEPTH</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) </span><span class="identifier">V</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">] = -1;</span>
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<span class="identifier">V</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="identifier">V</span><span class="plain">.</span><span class="element">build_metadata</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">V</span><span class="plain">;</span>
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<span class="plain">#</span><span class="identifier">pragma</span><span class="plain"> </span><span class="identifier">clang</span><span class="plain"> </span><span class="identifier">diagnostic</span><span class="plain"> </span><span class="identifier">pop</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::is_null</span><span class="plain">(</span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V</span><span class="plain">) {</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0, </span><span class="identifier">allow</span><span class="plain">=</span><span class="constant">TRUE</span><span class="plain">; </span><span class="identifier">i</span><span class="plain"><</span><span class="constant">SEMVER_NUMBER_DEPTH</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">V</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">] < -1) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">; </span><span class="comment"> should never happen</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">V</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">] == -1) </span><span class="identifier">allow</span><span class="plain"> = </span><span class="constant">FALSE</span><span class="plain">;</span>
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<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">allow</span><span class="plain"> == </span><span class="constant">FALSE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">; </span><span class="comment"> should never happen</span>
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<span class="plain">}</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">V</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[0] < </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function VersionNumbers::null is used in <a href="#SP7">§7</a>, <a href="#SP7_1">§7.1</a>, 7/vnr (<a href="7-vnr.html#SP3">§3</a>, <a href="7-vnr.html#SP4">§4</a>), 8/ws (<a href="8-ws.html#SP5_2">§5.2</a>).</p>
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<p class="endnote">The function VersionNumbers::is_null is used in <a href="#SP5">§5</a>, 7/vnr (<a href="7-vnr.html#SP4">§4</a>, <a href="7-vnr.html#SP6">§6</a>), 8/bf (<a href="8-bf.html#SP6">§6</a>).</p>
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<p class="inwebparagraph"><a id="SP5"></a><b>§5. Printing and parsing. </b>Printing is simple enough:
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</p>
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<pre class="display">
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">VersionNumbers::to_text</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">VersionNumbers::is_null</span><span class="plain">(</span><span class="identifier">V</span><span class="plain">)) { </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"null"</span><span class="plain">); </span><span class="reserved">return</span><span class="plain">; }</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; (</span><span class="identifier">i</span><span class="plain"><</span><span class="constant">SEMVER_NUMBER_DEPTH</span><span class="plain">) && (</span><span class="identifier">V</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">] >= </span><span class="constant">0</span><span class="plain">); </span><span class="identifier">i</span><span class="plain">++) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">>0) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"."</span><span class="plain">);</span>
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<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"%d"</span><span class="plain">, </span><span class="identifier">V</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]);</span>
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<span class="plain">}</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">V</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain">) {</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">c</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
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<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain">;</span>
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<span class="identifier">LOOP_OVER_LINKED_LIST</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain">, </span><span class="identifier">V</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain">++ == </span><span class="constant">0</span><span class="plain">) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"-"</span><span class="plain">); </span><span class="reserved">else</span><span class="plain"> </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"."</span><span class="plain">);</span>
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<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"%S"</span><span class="plain">, </span><span class="identifier">T</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="plain">}</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">V</span><span class="plain">.</span><span class="element">build_metadata</span><span class="plain">) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"+%S"</span><span class="plain">, </span><span class="identifier">V</span><span class="plain">.</span><span class="element">build_metadata</span><span class="plain">);</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function VersionNumbers::to_text is used in <a href="#SP6">§6</a>.</p>
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<p class="inwebparagraph"><a id="SP6"></a><b>§6. </b>And this provides for the <code class="display"><span class="extract">%v</span></code> escape, though we must be careful when
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using this to pass a pointer to the version, not the version itself;
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variadic macros are not carefully enough type-checked by <code class="display"><span class="extract">clang</span></code> or <code class="display"><span class="extract">gcc</span></code>
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to catch this sort of slip.
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</p>
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<pre class="display">
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">VersionNumbers::writer</span><span class="plain">(</span><span class="constant">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">char</span><span class="plain"> *</span><span class="identifier">format_string</span><span class="plain">, </span><span class="reserved">void</span><span class="plain"> *</span><span class="identifier">vE</span><span class="plain">) {</span>
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<span class="reserved">semantic_version_number</span><span class="plain"> *</span><span class="identifier">V</span><span class="plain"> = (</span><span class="reserved">semantic_version_number</span><span class="plain"> *) </span><span class="identifier">vE</span><span class="plain">;</span>
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<span class="functiontext">VersionNumbers::to_text</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, *</span><span class="identifier">V</span><span class="plain">);</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function VersionNumbers::writer is used in 1/fm (<a href="1-fm.html#SP8_1">§8.1</a>).</p>
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<p class="inwebparagraph"><a id="SP7"></a><b>§7. </b>Parsing is much more of a slog. The following returns a null version if
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the text <code class="display"><span class="extract">T</span></code> is in any respect malformed, i.e., if it deviates from the
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above specification in even the most trivial way. We parse the three parts
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of a semver version in order: e.g. <code class="display"><span class="extract">3.1.41-alpha.72.zeta+6Q45</span></code> the first
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part is up to the hyphen, the second part between the hyphen and the plus
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sign, and the third part runs to the end. The second and third parts are
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optional, but if both are given, they must be in that order.
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">enum</span> <span class="constant">MMP_SEMVERPART</span><span class="definitionkeyword"> from </span><span class="constant">1</span>
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<span class="definitionkeyword">enum</span> <span class="constant">PRE_SEMVERPART</span>
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<span class="definitionkeyword">enum</span> <span class="constant">BM_SEMVERPART</span>
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</pre>
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<pre class="display">
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<span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="functiontext">VersionNumbers::from_text</span><span class="plain">(</span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain">) {</span>
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<span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V</span><span class="plain"> = </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">component</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">, </span><span class="identifier">val</span><span class="plain"> = -1, </span><span class="identifier">dots_used</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">, </span><span class="identifier">slashes_used</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">, </span><span class="identifier">count</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">part</span><span class="plain"> = </span><span class="constant">MMP_SEMVERPART</span><span class="plain">;</span>
|
|
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">prerelease</span><span class="plain">);</span>
|
|
<span class="identifier">LOOP_THROUGH_TEXT</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">, </span><span class="identifier">T</span><span class="plain">) {</span>
|
|
<span class="identifier">wchar_t</span><span class="plain"> </span><span class="identifier">c</span><span class="plain"> = </span><span class="functiontext">Str::get</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">);</span>
|
|
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">part</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="identifier">MMP_SEMVERPART:</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'.'</span><span class="plain">) </span><span class="identifier">dots_used</span><span class="plain">++;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'/'</span><span class="plain">) </span><span class="identifier">slashes_used</span><span class="plain">++;</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'.'</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'/'</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'-'</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'+'</span><span class="plain">)) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">val</span><span class="plain"> == -1) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">component</span><span class="plain"> >= </span><span class="constant">SEMVER_NUMBER_DEPTH</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="identifier">V</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">component</span><span class="plain">] = </span><span class="identifier">val</span><span class="plain">;</span>
|
|
<span class="identifier">component</span><span class="plain">++; </span><span class="identifier">val</span><span class="plain"> = -1; </span><span class="identifier">count</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'-'</span><span class="plain">) </span><span class="identifier">part</span><span class="plain"> = </span><span class="constant">PRE_SEMVERPART</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'+'</span><span class="plain">) </span><span class="identifier">part</span><span class="plain"> = </span><span class="constant">BM_SEMVERPART</span><span class="plain">;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Characters::isdigit</span><span class="plain">(</span><span class="identifier">c</span><span class="plain">)) {</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">digit</span><span class="plain"> = </span><span class="identifier">c</span><span class="plain"> - </span><span class="character">'0'</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">val</span><span class="plain"> == </span><span class="constant">0</span><span class="plain">) && (</span><span class="identifier">slashes_used</span><span class="plain"> == </span><span class="constant">0</span><span class="plain">))</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">val</span><span class="plain"> < </span><span class="constant">0</span><span class="plain">) </span><span class="identifier">val</span><span class="plain"> = </span><span class="identifier">digit</span><span class="plain">; </span><span class="reserved">else</span><span class="plain"> </span><span class="identifier">val</span><span class="plain"> = </span><span class="constant">10</span><span class="plain">*</span><span class="identifier">val</span><span class="plain"> + </span><span class="identifier">digit</span><span class="plain">;</span>
|
|
<span class="identifier">count</span><span class="plain">++;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="identifier">PRE_SEMVERPART:</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'.'</span><span class="plain">) {</span>
|
|
<<span class="cwebmacro">Add prerelease content</span> <span class="cwebmacronumber">7.1</span>><span class="plain">;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'+'</span><span class="plain">) {</span>
|
|
<<span class="cwebmacro">Add prerelease content</span> <span class="cwebmacronumber">7.1</span>><span class="plain">; </span><span class="identifier">part</span><span class="plain"> = </span><span class="constant">BM_SEMVERPART</span><span class="plain">;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="identifier">PUT_TO</span><span class="plain">(</span><span class="identifier">prerelease</span><span class="plain">, </span><span class="identifier">c</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="identifier">BM_SEMVERPART:</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">V</span><span class="plain">.</span><span class="element">build_metadata</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">V</span><span class="plain">.</span><span class="element">build_metadata</span><span class="plain"> = </span><span class="functiontext">Str::new</span><span class="plain">();</span>
|
|
<span class="identifier">PUT_TO</span><span class="plain">(</span><span class="identifier">V</span><span class="plain">.</span><span class="element">build_metadata</span><span class="plain">, </span><span class="identifier">c</span><span class="plain">);</span>
|
|
<span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">part</span><span class="plain"> == </span><span class="constant">PRE_SEMVERPART</span><span class="plain">) && (</span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">prerelease</span><span class="plain">) > </span><span class="constant">0</span><span class="plain">)) </span><<span class="cwebmacro">Add prerelease content</span> <span class="cwebmacronumber">7.1</span>><span class="plain">;</span>
|
|
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">prerelease</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">dots_used</span><span class="plain"> > </span><span class="constant">0</span><span class="plain">) && (</span><span class="identifier">slashes_used</span><span class="plain"> > </span><span class="constant">0</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">slashes_used</span><span class="plain"> > </span><span class="constant">0</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">component</span><span class="plain"> > </span><span class="constant">1</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">count</span><span class="plain"> != </span><span class="constant">6</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">part</span><span class="plain"> == </span><span class="constant">MMP_SEMVERPART</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">val</span><span class="plain"> == -1) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">component</span><span class="plain"> >= </span><span class="constant">SEMVER_NUMBER_DEPTH</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="identifier">V</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">component</span><span class="plain">] = </span><span class="identifier">val</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">V</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function VersionNumbers::from_text is used in 8/bf (<a href="8-bf.html#SP6">§6</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP7_1"></a><b>§7.1. </b><code class="display">
|
|
<<span class="cwebmacrodefn">Add prerelease content</span> <span class="cwebmacronumber">7.1</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">prerelease</span><span class="plain">) == </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::null</span><span class="plain">();</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">V</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">V</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain"> = </span><span class="identifier">NEW_LINKED_LIST</span><span class="plain">(</span><span class="reserved">text_stream</span><span class="plain">);</span>
|
|
<span class="identifier">ADD_TO_LINKED_LIST</span><span class="plain">(</span><span class="functiontext">Str::duplicate</span><span class="plain">(</span><span class="identifier">prerelease</span><span class="plain">), </span><span class="reserved">text_stream</span><span class="plain">, </span><span class="identifier">V</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain">);</span>
|
|
<span class="functiontext">Str::clear</span><span class="plain">(</span><span class="identifier">prerelease</span><span class="plain">);</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP7">§7</a> (three times).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP8"></a><b>§8. Precendence. </b>The most important part of the semver standard is the rule on which versions
|
|
take precedence over which others, and we follow it exactly. The following
|
|
criteria are used in turn: major version; minor version; patch version;
|
|
any prerelease elements, which must be compared numerically if consisting
|
|
of digits only, and alphabetically otherwise; and finally the number of
|
|
prerelease elements. Build metadata is disregarded entirely.
|
|
</p>
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::le</span><span class="plain">(</span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain">, </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain">) {</span>
|
|
<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="constant">SEMVER_NUMBER_DEPTH</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) {</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">N1</span><span class="plain"> = </span><span class="functiontext">VersionNumbers::floor</span><span class="plain">(</span><span class="identifier">V1</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]);</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">N2</span><span class="plain"> = </span><span class="functiontext">VersionNumbers::floor</span><span class="plain">(</span><span class="identifier">V2</span><span class="plain">.</span><span class="element">version_numbers</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">N1</span><span class="plain"> > </span><span class="identifier">N2</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">N1</span><span class="plain"> < </span><span class="identifier">N2</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">linked_list_item</span><span class="plain"> *</span><span class="identifier">I1</span><span class="plain"> = (</span><span class="identifier">V1</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain">)?(</span><span class="functiontext">LinkedLists::first</span><span class="plain">(</span><span class="identifier">V1</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain">)):</span><span class="identifier">NULL</span><span class="plain">;</span>
|
|
<span class="reserved">linked_list_item</span><span class="plain"> *</span><span class="identifier">I2</span><span class="plain"> = (</span><span class="identifier">V2</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain">)?(</span><span class="functiontext">LinkedLists::first</span><span class="plain">(</span><span class="identifier">V2</span><span class="plain">.</span><span class="element">prerelease_segments</span><span class="plain">)):</span><span class="identifier">NULL</span><span class="plain">;</span>
|
|
<span class="reserved">while</span><span class="plain"> ((</span><span class="identifier">I1</span><span class="plain">) && (</span><span class="identifier">I2</span><span class="plain">)) {</span>
|
|
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">T1</span><span class="plain"> = (</span><span class="reserved">text_stream</span><span class="plain"> *) </span><span class="functiontext">LinkedLists::content</span><span class="plain">(</span><span class="identifier">I1</span><span class="plain">);</span>
|
|
<span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">T2</span><span class="plain"> = (</span><span class="reserved">text_stream</span><span class="plain"> *) </span><span class="functiontext">LinkedLists::content</span><span class="plain">(</span><span class="identifier">I2</span><span class="plain">);</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">N1</span><span class="plain"> = </span><span class="functiontext">VersionNumbers::strict_atoi</span><span class="plain">(</span><span class="identifier">T1</span><span class="plain">);</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">N2</span><span class="plain"> = </span><span class="functiontext">VersionNumbers::strict_atoi</span><span class="plain">(</span><span class="identifier">T2</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">N1</span><span class="plain"> >= </span><span class="constant">0</span><span class="plain">) && (</span><span class="identifier">N2</span><span class="plain"> >= </span><span class="constant">0</span><span class="plain">)) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">N1</span><span class="plain"> < </span><span class="identifier">N2</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">N1</span><span class="plain"> > </span><span class="identifier">N2</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Str::ne</span><span class="plain">(</span><span class="identifier">T1</span><span class="plain">, </span><span class="identifier">T2</span><span class="plain">)) {</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">c</span><span class="plain"> = </span><span class="functiontext">Str::cmp</span><span class="plain">(</span><span class="identifier">T1</span><span class="plain">, </span><span class="identifier">T2</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain"> < </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">c</span><span class="plain"> > </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
<span class="identifier">I1</span><span class="plain"> = </span><span class="functiontext">LinkedLists::next</span><span class="plain">(</span><span class="identifier">I1</span><span class="plain">);</span>
|
|
<span class="identifier">I2</span><span class="plain"> = </span><span class="functiontext">LinkedLists::next</span><span class="plain">(</span><span class="identifier">I2</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">I1</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) && (</span><span class="identifier">I2</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">I1</span><span class="plain">) && (</span><span class="identifier">I2</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function VersionNumbers::le is used in <a href="#SP11">§11</a>, 7/vnr (<a href="7-vnr.html#SP6">§6</a>).</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP9"></a><b>§9. </b>The effect of this is to read unspecified versions of major, minor or patch
|
|
as if they were 0:
|
|
</p>
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::floor</span><span class="plain">(</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">N</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">N</span><span class="plain"> < </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">0</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">N</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function VersionNumbers::floor is used in <a href="#SP8">§8</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP10"></a><b>§10. </b>This returns a non-negative integer if <code class="display"><span class="extract">T</span></code> contains only digits, and <code class="display"><span class="extract">-1</span></code>
|
|
otherwise. If the value has more than about 10 digits, then the result will
|
|
not be meaningful, which I think is a technical violation of the standard.
|
|
</p>
|
|
|
|
<pre class="display">
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::strict_atoi</span><span class="plain">(</span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain">) {</span>
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<span class="identifier">LOOP_THROUGH_TEXT</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">, </span><span class="identifier">T</span><span class="plain">)</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Characters::isdigit</span><span class="plain">(</span><span class="functiontext">Str::get</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">)) == </span><span class="constant">FALSE</span><span class="plain">)</span>
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<span class="reserved">return</span><span class="plain"> -1;</span>
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<span class="identifier">wchar_t</span><span class="plain"> </span><span class="identifier">c</span><span class="plain"> = </span><span class="functiontext">Str::get_first_char</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'0'</span><span class="plain">) && (</span><span class="functiontext">Str::len</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">) > </span><span class="constant">1</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> -1;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Str::atoi</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">, </span><span class="constant">0</span><span class="plain">);</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function VersionNumbers::strict_atoi is used in <a href="#SP8">§8</a>.</p>
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<p class="inwebparagraph"><a id="SP11"></a><b>§11. Trichotomy. </b>We now use the above function to construct ordering relations on semvers.
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These are trichotomous, that is, for each pair <code class="display"><span class="extract">V1, V2</span></code>, exactly one of the
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<code class="display"><span class="extract">VersionNumbers::eq(V1, V2)</span></code>, <code class="display"><span class="extract">VersionNumbers::gt(V1, V2)</span></code>, <code class="display"><span class="extract">VersionNumbers::lt(V1, V2)</span></code>
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is true.
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</p>
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<pre class="display">
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::eq</span><span class="plain">(</span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain">, </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="functiontext">VersionNumbers::le</span><span class="plain">(</span><span class="identifier">V1</span><span class="plain">, </span><span class="identifier">V2</span><span class="plain">)) && (</span><span class="functiontext">VersionNumbers::le</span><span class="plain">(</span><span class="identifier">V2</span><span class="plain">, </span><span class="identifier">V1</span><span class="plain">)))</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="constant">TRUE</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="constant">FALSE</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::ne</span><span class="plain">(</span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain">, </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> (</span><span class="functiontext">VersionNumbers::eq</span><span class="plain">(</span><span class="identifier">V1</span><span class="plain">, </span><span class="identifier">V2</span><span class="plain">))?</span><span class="identifier">FALSE:TRUE</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::gt</span><span class="plain">(</span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain">, </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain">) {</span>
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|
<span class="reserved">return</span><span class="plain"> (</span><span class="functiontext">VersionNumbers::le</span><span class="plain">(</span><span class="identifier">V1</span><span class="plain">, </span><span class="identifier">V2</span><span class="plain">))?</span><span class="identifier">FALSE:TRUE</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::ge</span><span class="plain">(</span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain">, </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain">) {</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">VersionNumbers::le</span><span class="plain">(</span><span class="identifier">V2</span><span class="plain">, </span><span class="identifier">V1</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
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|
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|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::lt</span><span class="plain">(</span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain">, </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain">) {</span>
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|
<span class="reserved">return</span><span class="plain"> (</span><span class="functiontext">VersionNumbers::ge</span><span class="plain">(</span><span class="identifier">V1</span><span class="plain">, </span><span class="identifier">V2</span><span class="plain">))?</span><span class="identifier">FALSE:TRUE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
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<p class="inwebparagraph"></p>
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|
|
|
<p class="endnote">The function VersionNumbers::eq is used in <a href="#SP12">§12</a>.</p>
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|
<p class="endnote">The function VersionNumbers::ne appears nowhere else.</p>
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|
<p class="endnote">The function VersionNumbers::gt is used in <a href="#SP12">§12</a>, 7/vnr (<a href="7-vnr.html#SP6">§6</a>).</p>
|
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<p class="endnote">The function VersionNumbers::ge is used in 7/vnr (<a href="7-vnr.html#SP6">§6</a>).</p>
|
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|
|
<p class="endnote">The function VersionNumbers::lt is used in 7/vnr (<a href="7-vnr.html#SP6">§6</a>).</p>
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<p class="inwebparagraph"><a id="SP12"></a><b>§12. </b>And the following can be used for sorting, following the <code class="display"><span class="extract">strcmp</span></code> convention.
|
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</p>
|
|
|
|
<pre class="display">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">VersionNumbers::cmp</span><span class="plain">(</span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain">, </span><span class="reserved">semantic_version_number</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain">) {</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">VersionNumbers::eq</span><span class="plain">(</span><span class="identifier">V1</span><span class="plain">, </span><span class="identifier">V2</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">0</span><span class="plain">;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">VersionNumbers::gt</span><span class="plain">(</span><span class="identifier">V1</span><span class="plain">, </span><span class="identifier">V2</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">1</span><span class="plain">;</span>
|
|
<span class="reserved">return</span><span class="plain"> -1;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function VersionNumbers::cmp is used in 7/vnr (<a href="7-vnr.html#SP8">§8</a>, <a href="7-vnr.html#SP9">§9</a>).</p>
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<hr class="tocbar">
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<ul class="toc"><li><i>(This section begins Chapter 7: Semantic Versioning.)</i></li><li><a href="7-vnr.html">Continue with 'Version Number Ranges'</a></li></ul><hr class="tocbar">
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