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<ul class="simple simple-toc" id="toc-list">
<li>
<a class="reference reference-toplevel" href="#7" id="57">Types</a>
<ul class="simple simple-toc-section">
<li><a class="reference" href="#hint"
title="hint = distinct int">hint</a></li>
<li><a class="reference" href="#hint32"
title="hint32 = distinct int32">hint32</a></li>
<li><a class="reference" href="#hint64"
title="hint64 = distinct int64">hint64</a></li>
<li><a class="reference" href="#LP"
title="LP = object">LP</a></li>
<li><a class="reference" href="#LPSomeUVarint"
title="LPSomeUVarint = uint | uint64 | uint32 | uint16 | uint8">LPSomeUVarint</a></li>
<li><a class="reference" href="#LPSomeVarint"
title="LPSomeVarint = LPSomeUVarint">LPSomeVarint</a></li>
<li><a class="reference" href="#PB"
title="PB = object">PB</a></li>
<li><a class="reference" href="#PBSomeSVarint"
title="PBSomeSVarint = hint | hint64 | hint32">PBSomeSVarint</a></li>
<li><a class="reference" href="#PBSomeUVarint"
title="PBSomeUVarint = uint | uint64 | uint32">PBSomeUVarint</a></li>
<li><a class="reference" href="#PBSomeVarint"
title="PBSomeVarint = PBSomeUVarint | PBSomeSVarint | PBZigVarint">PBSomeVarint</a></li>
<li><a class="reference" href="#PBZigVarint"
title="PBZigVarint = zint | zint64 | zint32">PBZigVarint</a></li>
<li><a class="reference" href="#SomeUVarint"
title="SomeUVarint = PBSomeUVarint | LPSomeUVarint">SomeUVarint</a></li>
<li><a class="reference" href="#SomeVarint"
title="SomeVarint = PBSomeVarint | LPSomeVarint">SomeVarint</a></li>
<li><a class="reference" href="#VarintError"
title="VarintError {.pure.} = enum
Error, Overflow, Incomplete, Overlong, Overrun">VarintError</a></li>
<li><a class="reference" href="#VarintResult"
title="VarintResult[T] = Result[T, VarintError]">VarintResult</a></li>
<li><a class="reference" href="#zint"
title="zint = distinct int">zint</a></li>
<li><a class="reference" href="#zint32"
title="zint32 = distinct int32">zint32</a></li>
<li><a class="reference" href="#zint64"
title="zint64 = distinct int64">zint64</a></li>
</ul>
</li>
<li>
<a class="reference reference-toplevel" href="#12" id="62">Procs</a>
<ul class="simple simple-toc-section">
<ul class="simple nested-toc-section">encodeVarint
<li><a class="reference" href="#encodeVarint%2Ctypedesc%5BLP%5D%2CLPSomeVarint"
title="encodeVarint(vtype: typedesc[LP]; value: LPSomeVarint): VarintResult[seq[byte]]">encodeVarint(vtype: typedesc[LP]; value: LPSomeVarint): VarintResult[seq[byte]]</a></li>
<li><a class="reference" href="#encodeVarint%2Ctypedesc%5BPB%5D%2CPBSomeVarint"
title="encodeVarint(vtype: typedesc[PB]; value: PBSomeVarint): VarintResult[seq[byte]]">encodeVarint(vtype: typedesc[PB]; value: PBSomeVarint): VarintResult[seq[byte]]</a></li>
</ul>
<ul class="simple nested-toc-section">getSVarint
<li><a class="reference" href="#getSVarint%2CopenArray%5Bbyte%5D%2Cint%2C"
title="getSVarint(pbytes: openArray[byte]; outsize: var int;
outval: var (PBZigVarint | PBSomeSVarint)): VarintResult[void]">getSVarint(pbytes: openArray[byte]; outsize: var int;
outval: var (PBZigVarint | PBSomeSVarint)): VarintResult[void]</a></li>
</ul>
<ul class="simple nested-toc-section">getUVarint
<li><a class="reference" href="#getUVarint%2Ctypedesc%5BT%5D%2CopenArray%5Bbyte%5D%2Cint%2CSomeUVarint"
title="getUVarint[T: PB | LP](vtype: typedesc[T]; pbytes: openArray[byte];
outlen: var int; outval: var SomeUVarint): VarintResult[
void]">getUVarint[T: PB | LP](vtype: typedesc[T]; pbytes: openArray[byte];
outlen: var int; outval: var SomeUVarint): VarintResult[
void]</a></li>
</ul>
<ul class="simple nested-toc-section">getVarint
<li><a class="reference" href="#getVarint%2Ctypedesc%5BT%5D%2CopenArray%5Bbyte%5D%2Cint%2CSomeVarint"
title="getVarint[T: PB | LP](vtype: typedesc[T]; pbytes: openArray[byte];
nbytes: var int; value: var SomeVarint): VarintResult[void]">getVarint[T: PB | LP](vtype: typedesc[T]; pbytes: openArray[byte];
nbytes: var int; value: var SomeVarint): VarintResult[void]</a></li>
</ul>
<ul class="simple nested-toc-section">putSVarint
<li><a class="reference" href="#putSVarint%2CopenArray%5Bbyte%5D%2Cint%2C"
title="putSVarint(pbytes: var openArray[byte]; outsize: var int;
outval: (PBZigVarint | PBSomeSVarint)): VarintResult[void]">putSVarint(pbytes: var openArray[byte]; outsize: var int;
outval: (PBZigVarint | PBSomeSVarint)): VarintResult[void]</a></li>
</ul>
<ul class="simple nested-toc-section">putUVarint
<li><a class="reference" href="#putUVarint%2Ctypedesc%5BT%5D%2CopenArray%5Bbyte%5D%2Cint%2CSomeUVarint"
title="putUVarint[T: PB | LP](vtype: typedesc[T]; pbytes: var openArray[byte];
outlen: var int; outval: SomeUVarint): VarintResult[void]">putUVarint[T: PB | LP](vtype: typedesc[T]; pbytes: var openArray[byte];
outlen: var int; outval: SomeUVarint): VarintResult[void]</a></li>
</ul>
<ul class="simple nested-toc-section">putVarint
<li><a class="reference" href="#putVarint%2Ctypedesc%5BT%5D%2CopenArray%5Bbyte%5D%2Cint%2CSomeVarint"
title="putVarint[T: PB | LP](vtype: typedesc[T]; pbytes: var openArray[byte];
nbytes: var int; value: SomeVarint): VarintResult[void]">putVarint[T: PB | LP](vtype: typedesc[T]; pbytes: var openArray[byte];
nbytes: var int; value: SomeVarint): VarintResult[void]</a></li>
</ul>
<ul class="simple nested-toc-section">vsizeof
<li><a class="reference" href="#vsizeof%2CSomeVarint"
title="vsizeof(x: SomeVarint): int">vsizeof(x: SomeVarint): int</a></li>
</ul>
</ul>
</li>
<li>
<a class="reference reference-toplevel" href="#18" id="68">Templates</a>
<ul class="simple simple-toc-section">
<ul class="simple nested-toc-section">toBytes
<li><a class="reference" href="#toBytes.t%2Ctypedesc%5BPB%5D%2CPBSomeVarint"
title="toBytes(vtype: typedesc[PB]; value: PBSomeVarint): auto">toBytes(vtype: typedesc[PB]; value: PBSomeVarint): auto</a></li>
</ul>
</ul>
</li>
</ul>
</div>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L1"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L1" class="link-seesrc" target="_blank" >Edit</a>
<div class="nine columns" id="content">
<div id="tocRoot"></div>
<p class="module-desc">This module implements Variable Integer <tt class="docutils literal"><span class="pre"><span class="Identifier">VARINT</span></span></tt>. This module supports two variants of variable integer<ul class="simple"><li>Google ProtoBuf varint, which is able to encode full uint64 number and maximum size of encoded value is 10 octets (bytes). <a class="reference external" href="https://developers.google.com/protocol-buffers/docs/encoding#varints">https://developers.google.com/protocol-buffers/docs/encoding#varints</a></li>
<li>LibP2P varint, which is able to encode only 63bits of uint64 number and maximum size of encoded value is 9 octets (bytes). <a class="reference external" href="https://github.com/multiformats/unsigned-varint">https://github.com/multiformats/unsigned-varint</a></li>
</ul>
</p>
<div class="section" id="7">
<h1><a class="toc-backref" href="#7">Types</a></h1>
<dl class="item">
<div id="hint" class="tohide">
<dt><pre><a href="varint.html#hint"><span class="Identifier">hint</span></a> <span class="Other">=</span> <span class="Keyword">distinct</span> <span class="Identifier">int</span></pre></dt>
<dd>
Signed integer types which will be encoded using simple cast.
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L46"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L46" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="hint32" class="tohide">
<dt><pre><a href="varint.html#hint32"><span class="Identifier">hint32</span></a> <span class="Other">=</span> <span class="Keyword">distinct</span> <span class="Identifier">int32</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L44"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L44" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="hint64" class="tohide">
<dt><pre><a href="varint.html#hint64"><span class="Identifier">hint64</span></a> <span class="Other">=</span> <span class="Keyword">distinct</span> <span class="Identifier">int64</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L45"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L45" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="LP" class="tohide">
<dt><pre><a href="varint.html#LP"><span class="Identifier">LP</span></a> <span class="Other">=</span> <span class="Keyword">object</span>
</pre></dt>
<dd>
Use this type to specify LibP2P varint encoding
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L36"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L36" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="LPSomeUVarint" class="tohide">
<dt><pre><a href="varint.html#LPSomeUVarint"><span class="Identifier">LPSomeUVarint</span></a> <span class="Other">=</span> <span class="Identifier">uint</span> <span class="Operator">|</span> <span class="Identifier">uint64</span> <span class="Operator">|</span> <span class="Identifier">uint32</span> <span class="Operator">|</span> <span class="Identifier">uint16</span> <span class="Operator">|</span> <span class="Identifier">uint8</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L53"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L53" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="LPSomeVarint" class="tohide">
<dt><pre><a href="varint.html#LPSomeVarint"><span class="Identifier">LPSomeVarint</span></a> <span class="Other">=</span> <a href="varint.html#LPSomeUVarint"><span class="Identifier">LPSomeUVarint</span></a></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L54"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L54" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="PB" class="tohide">
<dt><pre><a href="varint.html#PB"><span class="Identifier">PB</span></a> <span class="Other">=</span> <span class="Keyword">object</span>
</pre></dt>
<dd>
Use this type to specify Google ProtoBuf's varint encoding
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L34"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L34" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="PBSomeSVarint" class="tohide">
<dt><pre><a href="varint.html#PBSomeSVarint"><span class="Identifier">PBSomeSVarint</span></a> <span class="Other">=</span> <a href="varint.html#hint"><span class="Identifier">hint</span></a> <span class="Operator">|</span> <a href="varint.html#hint64"><span class="Identifier">hint64</span></a> <span class="Operator">|</span> <a href="varint.html#hint32"><span class="Identifier">hint32</span></a></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L50"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L50" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="PBSomeUVarint" class="tohide">
<dt><pre><a href="varint.html#PBSomeUVarint"><span class="Identifier">PBSomeUVarint</span></a> <span class="Other">=</span> <span class="Identifier">uint</span> <span class="Operator">|</span> <span class="Identifier">uint64</span> <span class="Operator">|</span> <span class="Identifier">uint32</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L49"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L49" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="PBSomeVarint" class="tohide">
<dt><pre><a href="varint.html#PBSomeVarint"><span class="Identifier">PBSomeVarint</span></a> <span class="Other">=</span> <a href="varint.html#PBSomeUVarint"><span class="Identifier">PBSomeUVarint</span></a> <span class="Operator">|</span> <a href="varint.html#PBSomeSVarint"><span class="Identifier">PBSomeSVarint</span></a> <span class="Operator">|</span> <a href="varint.html#PBZigVarint"><span class="Identifier">PBZigVarint</span></a></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L52"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L52" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="PBZigVarint" class="tohide">
<dt><pre><a href="varint.html#PBZigVarint"><span class="Identifier">PBZigVarint</span></a> <span class="Other">=</span> <a href="varint.html#zint"><span class="Identifier">zint</span></a> <span class="Operator">|</span> <a href="varint.html#zint64"><span class="Identifier">zint64</span></a> <span class="Operator">|</span> <a href="varint.html#zint32"><span class="Identifier">zint32</span></a></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L51"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L51" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="SomeUVarint" class="tohide">
<dt><pre><a href="varint.html#SomeUVarint"><span class="Identifier">SomeUVarint</span></a> <span class="Other">=</span> <a href="varint.html#PBSomeUVarint"><span class="Identifier">PBSomeUVarint</span></a> <span class="Operator">|</span> <a href="varint.html#LPSomeUVarint"><span class="Identifier">LPSomeUVarint</span></a></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L56"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L56" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="SomeVarint" class="tohide">
<dt><pre><a href="varint.html#SomeVarint"><span class="Identifier">SomeVarint</span></a> <span class="Other">=</span> <a href="varint.html#PBSomeVarint"><span class="Identifier">PBSomeVarint</span></a> <span class="Operator">|</span> <a href="varint.html#LPSomeVarint"><span class="Identifier">LPSomeVarint</span></a></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L55"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L55" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="VarintError" class="tohide">
<dt><pre><a href="varint.html#VarintError"><span class="Identifier">VarintError</span></a> {.<span class="Identifier">pure</span>.} <span class="Other">=</span> <span class="Keyword">enum</span>
<span class="Identifier">Error</span><span class="Other">,</span> <span class="Identifier">Overflow</span><span class="Other">,</span> <span class="Identifier">Incomplete</span><span class="Other">,</span> <span class="Identifier">Overlong</span><span class="Other">,</span> <span class="Identifier">Overrun</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L25"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L25" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="VarintResult" class="tohide">
<dt><pre><a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span> <span class="Other">=</span> <span class="Identifier">Result</span><span class="Other">[</span><span class="Identifier">T</span><span class="Other">,</span> <a href="varint.html#VarintError"><span class="Identifier">VarintError</span></a><span class="Other">]</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L32"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L32" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="zint" class="tohide">
<dt><pre><a href="varint.html#zint"><span class="Identifier">zint</span></a> <span class="Other">=</span> <span class="Keyword">distinct</span> <span class="Identifier">int</span></pre></dt>
<dd>
Signed integer types which will be encoded using zigzag encoding.
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L41"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L41" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="zint32" class="tohide">
<dt><pre><a href="varint.html#zint32"><span class="Identifier">zint32</span></a> <span class="Other">=</span> <span class="Keyword">distinct</span> <span class="Identifier">int32</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L39"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L39" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="zint64" class="tohide">
<dt><pre><a href="varint.html#zint64"><span class="Identifier">zint64</span></a> <span class="Other">=</span> <span class="Keyword">distinct</span> <span class="Identifier">int64</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L40"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L40" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
</dl></div>
<div class="section" id="12">
<h1><a class="toc-backref" href="#12">Procs</a></h1>
<dl class="item">
<div id="encodeVarint,typedesc[LP],LPSomeVarint" class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#encodeVarint%2Ctypedesc%5BLP%5D%2CLPSomeVarint"><span class="Identifier">encodeVarint</span></a><span class="Other">(</span><span class="Identifier">vtype</span><span class="Other">:</span> <span class="Identifier">typedesc</span><span class="Other">[</span><a href="varint.html#LP"><span class="Identifier">LP</span></a><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <a href="varint.html#LPSomeVarint"><span class="Identifier">LPSomeVarint</span></a><span class="Other">)</span><span class="Other">:</span> <a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span>
<span class="Identifier">seq</span><span class="Other">[</span><span class="Identifier">byte</span><span class="Other">]</span><span class="Other">]</span> {.<span class="Identifier">inline</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
Encode integer to LibP2P <tt class="docutils literal"><span class="pre"><span class="Identifier">unsigned</span> <span class="Identifier">varint</span></span></tt> and returns sequence of bytes as buffer.
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L288"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L288" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="encodeVarint,typedesc[PB],PBSomeVarint" class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#encodeVarint%2Ctypedesc%5BPB%5D%2CPBSomeVarint"><span class="Identifier">encodeVarint</span></a><span class="Other">(</span><span class="Identifier">vtype</span><span class="Other">:</span> <span class="Identifier">typedesc</span><span class="Other">[</span><a href="varint.html#PB"><span class="Identifier">PB</span></a><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <a href="varint.html#PBSomeVarint"><span class="Identifier">PBSomeVarint</span></a><span class="Other">)</span><span class="Other">:</span> <a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span>
<span class="Identifier">seq</span><span class="Other">[</span><span class="Identifier">byte</span><span class="Other">]</span><span class="Other">]</span> {.<span class="Identifier">inline</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
Encode integer to Google ProtoBuf's <tt class="docutils literal"><span class="pre"><span class="Identifier">signed</span><span class="Operator">/</span><span class="Identifier">unsigned</span> <span class="Identifier">varint</span></span></tt> and returns sequence of bytes as buffer.
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L268"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L268" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="getSVarint,openArray[byte],int," class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#getSVarint%2CopenArray%5Bbyte%5D%2Cint%2C"><span class="Identifier">getSVarint</span></a><span class="Other">(</span><span class="Identifier">pbytes</span><span class="Other">:</span> <span class="Identifier">openArray</span><span class="Other">[</span><span class="Identifier">byte</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">outsize</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">int</span><span class="Other">;</span>
<span class="Identifier">outval</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Other">(</span><a href="varint.html#PBZigVarint"><span class="Identifier">PBZigVarint</span></a> <span class="Operator">|</span> <a href="varint.html#PBSomeSVarint"><span class="Identifier">PBSomeSVarint</span></a><span class="Other">)</span><span class="Other">)</span><span class="Other">:</span> <a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span><span class="Identifier">void</span><span class="Other">]</span> {.
<span class="Identifier">inline</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
<p>Decode signed integer (<tt class="docutils literal"><span class="pre">int32</span></tt> or <tt class="docutils literal"><span class="pre">int64</span></tt>) from buffer <tt class="docutils literal"><span class="pre">pbytes</span></tt> and store it to <tt class="docutils literal"><span class="pre">outval</span></tt>.</p>
<p>On success <tt class="docutils literal"><span class="pre">outlen</span></tt> will be set to number of bytes processed while decoding signed varint.</p>
<p>If array <tt class="docutils literal"><span class="pre">pbytes</span></tt> is empty, <tt class="docutils literal"><span class="pre">Incomplete</span></tt> error will be returned.</p>
<p>If there not enough bytes available in array <tt class="docutils literal"><span class="pre">pbytes</span></tt> to decode <tt class="docutils literal"><span class="pre"><span class="Identifier">signed</span> <span class="Identifier">varint</span></span></tt>, <tt class="docutils literal"><span class="pre">Incomplete</span></tt> error will be returned.</p>
<p>If encoded value can produce integer overflow, <tt class="docutils literal"><span class="pre">Overflow</span></tt> error will be returned.</p>
<p>Note, when decoding 10th byte of 64bit integer only 1 bit from byte will be decoded, all other bits will be ignored. When decoding 5th byte of 32bit integer only 4 bits from byte will be decoded, all other bits will be ignored.</p>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L180"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L180" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="getUVarint,typedesc[T],openArray[byte],int,SomeUVarint" class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#getUVarint%2Ctypedesc%5BT%5D%2CopenArray%5Bbyte%5D%2Cint%2CSomeUVarint"><span class="Identifier">getUVarint</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">:</span> <a href="varint.html#PB"><span class="Identifier">PB</span></a> <span class="Operator">|</span> <a href="varint.html#LP"><span class="Identifier">LP</span></a><span class="Other">]</span><span class="Other">(</span><span class="Identifier">vtype</span><span class="Other">:</span> <span class="Identifier">typedesc</span><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">pbytes</span><span class="Other">:</span> <span class="Identifier">openArray</span><span class="Other">[</span><span class="Identifier">byte</span><span class="Other">]</span><span class="Other">;</span>
<span class="Identifier">outlen</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">int</span><span class="Other">;</span> <span class="Identifier">outval</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="varint.html#SomeUVarint"><span class="Identifier">SomeUVarint</span></a><span class="Other">)</span><span class="Other">:</span> <a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span>
<span class="Identifier">void</span><span class="Other">]</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
<p>Decode <tt class="docutils literal"><span class="pre"><span class="Identifier">unsigned</span> <span class="Identifier">varint</span></span></tt> from buffer <tt class="docutils literal"><span class="pre">pbytes</span></tt> and store it to <tt class="docutils literal"><span class="pre">outval</span></tt>. On success <tt class="docutils literal"><span class="pre">outlen</span></tt> will be set to number of bytes processed while decoding <tt class="docutils literal"><span class="pre"><span class="Identifier">unsigned</span> <span class="Identifier">varint</span></span></tt>.</p>
<p>If array <tt class="docutils literal"><span class="pre">pbytes</span></tt> is empty, <tt class="docutils literal"><span class="pre">Incomplete</span></tt> error will be returned.</p>
<p>If there not enough bytes available in array <tt class="docutils literal"><span class="pre">pbytes</span></tt> to decode <tt class="docutils literal"><span class="pre"><span class="Identifier">unsigned</span> <span class="Identifier">varint</span></span></tt>, <tt class="docutils literal"><span class="pre">Incomplete</span></tt> error will be returned.</p>
<p>If encoded value can produce integer overflow, <tt class="docutils literal"><span class="pre">Overflow</span></tt> error will be returned.</p>
<p>Google ProtoBuf When decoding 10th byte of Google Protobuf's 64bit integer only 1 bit from byte will be decoded, all other bits will be ignored. When decoding 5th byte of 32bit integer only 4 bits from byte will be decoded, all other bits will be ignored.</p>
<p>LibP2P When decoding 5th byte of 32bit integer only 4 bits from byte will be decoded, all other bits will be ignored.</p>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L102"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L102" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="getVarint,typedesc[T],openArray[byte],int,SomeVarint" class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#getVarint%2Ctypedesc%5BT%5D%2CopenArray%5Bbyte%5D%2Cint%2CSomeVarint"><span class="Identifier">getVarint</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">:</span> <a href="varint.html#PB"><span class="Identifier">PB</span></a> <span class="Operator">|</span> <a href="varint.html#LP"><span class="Identifier">LP</span></a><span class="Other">]</span><span class="Other">(</span><span class="Identifier">vtype</span><span class="Other">:</span> <span class="Identifier">typedesc</span><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">pbytes</span><span class="Other">:</span> <span class="Identifier">openArray</span><span class="Other">[</span><span class="Identifier">byte</span><span class="Other">]</span><span class="Other">;</span>
<span class="Identifier">nbytes</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">int</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="varint.html#SomeVarint"><span class="Identifier">SomeVarint</span></a><span class="Other">)</span><span class="Other">:</span> <a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span>
<span class="Identifier">void</span><span class="Other">]</span> {.<span class="Identifier">inline</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L247"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L247" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="putSVarint,openArray[byte],int," class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#putSVarint%2CopenArray%5Bbyte%5D%2Cint%2C"><span class="Identifier">putSVarint</span></a><span class="Other">(</span><span class="Identifier">pbytes</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">openArray</span><span class="Other">[</span><span class="Identifier">byte</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">outsize</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">int</span><span class="Other">;</span>
<span class="Identifier">outval</span><span class="Other">:</span> <span class="Other">(</span><a href="varint.html#PBZigVarint"><span class="Identifier">PBZigVarint</span></a> <span class="Operator">|</span> <a href="varint.html#PBSomeSVarint"><span class="Identifier">PBSomeSVarint</span></a><span class="Other">)</span><span class="Other">)</span><span class="Other">:</span> <a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span><span class="Identifier">void</span><span class="Other">]</span> {.
<span class="Identifier">inline</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
<p>Encode signed integer <tt class="docutils literal"><span class="pre">outval</span></tt> using ProtoBuffer's zigzag encoding (<tt class="docutils literal"><span class="pre">sint32</span></tt> or <tt class="docutils literal"><span class="pre">sint64</span></tt>) and store it to array <tt class="docutils literal"><span class="pre">pbytes</span></tt>.</p>
<p>On success <tt class="docutils literal"><span class="pre">outlen</span></tt> will hold number of bytes (octets) used to encode unsigned integer <tt class="docutils literal"><span class="pre">v</span></tt>.</p>
<p>If there not enough bytes available in buffer <tt class="docutils literal"><span class="pre">pbytes</span></tt>, <tt class="docutils literal"><span class="pre">Incomplete</span></tt> error will be returned and <tt class="docutils literal"><span class="pre">outlen</span></tt> will be set to number of bytes required.</p>
<p>Maximum encoded length of 64bit integer is 10 octets. Maximum encoded length of 32bit integer is 5 octets.</p>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L210"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L210" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="putUVarint,typedesc[T],openArray[byte],int,SomeUVarint" class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#putUVarint%2Ctypedesc%5BT%5D%2CopenArray%5Bbyte%5D%2Cint%2CSomeUVarint"><span class="Identifier">putUVarint</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">:</span> <a href="varint.html#PB"><span class="Identifier">PB</span></a> <span class="Operator">|</span> <a href="varint.html#LP"><span class="Identifier">LP</span></a><span class="Other">]</span><span class="Other">(</span><span class="Identifier">vtype</span><span class="Other">:</span> <span class="Identifier">typedesc</span><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">pbytes</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">openArray</span><span class="Other">[</span><span class="Identifier">byte</span><span class="Other">]</span><span class="Other">;</span>
<span class="Identifier">outlen</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">int</span><span class="Other">;</span> <span class="Identifier">outval</span><span class="Other">:</span> <a href="varint.html#SomeUVarint"><span class="Identifier">SomeUVarint</span></a><span class="Other">)</span><span class="Other">:</span> <a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span>
<span class="Identifier">void</span><span class="Other">]</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
<p>Encode <tt class="docutils literal"><span class="pre"><span class="Identifier">unsigned</span> <span class="Identifier">varint</span></span></tt> <tt class="docutils literal"><span class="pre">outval</span></tt> and store it to array <tt class="docutils literal"><span class="pre">pbytes</span></tt>.</p>
<p>On success <tt class="docutils literal"><span class="pre">outlen</span></tt> will hold number of bytes (octets) used to encode unsigned integer <tt class="docutils literal"><span class="pre">v</span></tt>.</p>
<p>If there not enough bytes available in buffer <tt class="docutils literal"><span class="pre">pbytes</span></tt>, <tt class="docutils literal"><span class="pre">Incomplete</span></tt> error will be returned and <tt class="docutils literal"><span class="pre">outlen</span></tt> will be set to number of bytes required.</p>
<p>Google ProtoBuf Maximum encoded length of 64bit integer is 10 octets. Maximum encoded length of 32bit integer is 5 octets.</p>
<p>LibP2P Maximum encoded length of 63bit integer is 9 octets. Maximum encoded length of 32bit integer is 5 octets.</p>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L148"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L148" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="putVarint,typedesc[T],openArray[byte],int,SomeVarint" class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#putVarint%2Ctypedesc%5BT%5D%2CopenArray%5Bbyte%5D%2Cint%2CSomeVarint"><span class="Identifier">putVarint</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">:</span> <a href="varint.html#PB"><span class="Identifier">PB</span></a> <span class="Operator">|</span> <a href="varint.html#LP"><span class="Identifier">LP</span></a><span class="Other">]</span><span class="Other">(</span><span class="Identifier">vtype</span><span class="Other">:</span> <span class="Identifier">typedesc</span><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">pbytes</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">openArray</span><span class="Other">[</span><span class="Identifier">byte</span><span class="Other">]</span><span class="Other">;</span>
<span class="Identifier">nbytes</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">int</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <a href="varint.html#SomeVarint"><span class="Identifier">SomeVarint</span></a><span class="Other">)</span><span class="Other">:</span> <a href="varint.html#VarintResult"><span class="Identifier">VarintResult</span></a><span class="Other">[</span>
<span class="Identifier">void</span><span class="Other">]</span> {.<span class="Identifier">inline</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L230"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L230" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
<div id="vsizeof,SomeVarint" class="tohide">
<dt><pre><span class="Keyword">proc</span> <a href="#vsizeof%2CSomeVarint"><span class="Identifier">vsizeof</span></a><span class="Other">(</span><span class="Identifier">x</span><span class="Other">:</span> <a href="varint.html#SomeVarint"><span class="Identifier">SomeVarint</span></a><span class="Other">)</span><span class="Other">:</span> <span class="Identifier">int</span> {.<span class="Identifier">inline</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
<dd>
Returns number of bytes required to encode integer <tt class="docutils literal"><span class="pre">x</span></tt> as varint.
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L98"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L98" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
</dl></div>
<div class="section" id="18">
<h1><a class="toc-backref" href="#18">Templates</a></h1>
<dl class="item">
<div id="toBytes.t,typedesc[PB],PBSomeVarint" class="tohide">
<dt><pre><span class="Keyword">template</span> <a href="#toBytes.t%2Ctypedesc%5BPB%5D%2CPBSomeVarint"><span class="Identifier">toBytes</span></a><span class="Other">(</span><span class="Identifier">vtype</span><span class="Other">:</span> <span class="Identifier">typedesc</span><span class="Other">[</span><a href="varint.html#PB"><span class="Identifier">PB</span></a><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <a href="varint.html#PBSomeVarint"><span class="Identifier">PBSomeVarint</span></a><span class="Other">)</span><span class="Other">:</span> <span class="Identifier">auto</span></pre></dt>
<dd>
&nbsp;&nbsp;<a
href="https://github.com/status-im/nim-libp2p/tree/chore-dummy-commit/libp2p/varint.nim#L265"
class="link-seesrc" target="_blank">Source</a>
&nbsp;&nbsp;<a href="https://github.com/status-im/nim-libp2p/edit/devel/libp2p/varint.nim#L265" class="link-seesrc" target="_blank" >Edit</a>
</dd>
</div>
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