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<h1>Module <a href="type_Stdlib.BytesLabels.html">Stdlib.BytesLabels</a></h1>

<pre><span id="MODULEBytesLabels"><span class="keyword">module</span> BytesLabels</span>: <code class="type"><a href="BytesLabels.html">BytesLabels</a></code></pre><hr width="100%">

<pre><span id="VALlength"><span class="keyword">val</span> length</span> : <code class="type">bytes -> int</code></pre><div class="info ">
<div class="info-desc">
<p>Return the length (number of bytes) of the argument.</p>
</div>
</div>

<pre><span id="VALget"><span class="keyword">val</span> get</span> : <code class="type">bytes -> int -> char</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get&nbsp;s&nbsp;n</code> returns the byte at index <code class="code">n</code> in argument <code class="code">s</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">n</code> is not a valid index in <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALset"><span class="keyword">val</span> set</span> : <code class="type">bytes -> int -> char -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set&nbsp;s&nbsp;n&nbsp;c</code> modifies <code class="code">s</code> in place, replacing the byte at index <code class="code">n</code>
    with <code class="code">c</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">n</code> is not a valid index in <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALcreate"><span class="keyword">val</span> create</span> : <code class="type">int -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">create&nbsp;n</code> returns a new byte sequence of length <code class="code">n</code>. The
    sequence is uninitialized and contains arbitrary bytes.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">n&nbsp;&lt;&nbsp;0</code> or <code class="code">n&nbsp;&gt;&nbsp;</code><a href="Sys.html#VALmax_string_length"><code class="code"><span class="constructor">Sys</span>.max_string_length</code></a>.</li>
</ul>
</div>

<pre><span id="VALmake"><span class="keyword">val</span> make</span> : <code class="type">int -> char -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">make&nbsp;n&nbsp;c</code> returns a new byte sequence of length <code class="code">n</code>, filled with
    the byte <code class="code">c</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">n&nbsp;&lt;&nbsp;0</code> or <code class="code">n&nbsp;&gt;&nbsp;</code><a href="Sys.html#VALmax_string_length"><code class="code"><span class="constructor">Sys</span>.max_string_length</code></a>.</li>
</ul>
</div>

<pre><span id="VALinit"><span class="keyword">val</span> init</span> : <code class="type">int -> f:(int -> char) -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">init&nbsp;n&nbsp;f</code> returns a fresh byte sequence of length <code class="code">n</code>,
    with character <code class="code">i</code> initialized to the result of <code class="code">f&nbsp;i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">n&nbsp;&lt;&nbsp;0</code> or <code class="code">n&nbsp;&gt;&nbsp;</code><a href="Sys.html#VALmax_string_length"><code class="code"><span class="constructor">Sys</span>.max_string_length</code></a>.</li>
</ul>
</div>

<pre><span id="VALempty"><span class="keyword">val</span> empty</span> : <code class="type">bytes</code></pre><div class="info ">
<div class="info-desc">
<p>A byte sequence of size 0.</p>
</div>
</div>

<pre><span id="VALcopy"><span class="keyword">val</span> copy</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p>Return a new byte sequence that contains the same bytes as the
    argument.</p>
</div>
</div>

<pre><span id="VALof_string"><span class="keyword">val</span> of_string</span> : <code class="type">string -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p>Return a new byte sequence that contains the same bytes as the
    given string.</p>
</div>
</div>

<pre><span id="VALto_string"><span class="keyword">val</span> to_string</span> : <code class="type">bytes -> string</code></pre><div class="info ">
<div class="info-desc">
<p>Return a new string that contains the same bytes as the given byte
    sequence.</p>
</div>
</div>

<pre><span id="VALsub"><span class="keyword">val</span> sub</span> : <code class="type">bytes -> pos:int -> len:int -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">sub&nbsp;s&nbsp;start&nbsp;len</code> returns a new byte sequence of length <code class="code">len</code>,
    containing the subsequence of <code class="code">s</code> that starts at position <code class="code">start</code>
    and has length <code class="code">len</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">start</code> and <code class="code">len</code> do not designate a
    valid range of <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALsub_string"><span class="keyword">val</span> sub_string</span> : <code class="type">bytes -> pos:int -> len:int -> string</code></pre><div class="info ">
<div class="info-desc">
<p>Same as <code class="code">sub</code> but return a string instead of a byte sequence.</p>
</div>
</div>

<pre><span id="VALextend"><span class="keyword">val</span> extend</span> : <code class="type">bytes -> left:int -> right:int -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">extend&nbsp;s&nbsp;left&nbsp;right</code> returns a new byte sequence that contains
    the bytes of <code class="code">s</code>, with <code class="code">left</code> uninitialized bytes prepended and
    <code class="code">right</code> uninitialized bytes appended to it. If <code class="code">left</code> or <code class="code">right</code>
    is negative, then bytes are removed (instead of appended) from
    the corresponding side of <code class="code">s</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05.0</li>
<li><b>Raises</b> <code>Invalid_argument</code> if the result length is negative or
    longer than <a href="Sys.html#VALmax_string_length"><code class="code"><span class="constructor">Sys</span>.max_string_length</code></a> bytes.</li>
</ul>
</div>

<pre><span id="VALfill"><span class="keyword">val</span> fill</span> : <code class="type">bytes -> pos:int -> len:int -> char -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">fill&nbsp;s&nbsp;start&nbsp;len&nbsp;c</code> modifies <code class="code">s</code> in place, replacing <code class="code">len</code>
    characters with <code class="code">c</code>, starting at <code class="code">start</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">start</code> and <code class="code">len</code> do not designate a
    valid range of <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALblit"><span class="keyword">val</span> blit</span> : <code class="type">src:bytes -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">blit&nbsp;src&nbsp;srcoff&nbsp;dst&nbsp;dstoff&nbsp;len</code> copies <code class="code">len</code> bytes from sequence
    <code class="code">src</code>, starting at index <code class="code">srcoff</code>, to sequence <code class="code">dst</code>, starting at
    index <code class="code">dstoff</code>. It works correctly even if <code class="code">src</code> and <code class="code">dst</code> are the
    same byte sequence, and the source and destination intervals
    overlap.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">srcoff</code> and <code class="code">len</code> do not
    designate a valid range of <code class="code">src</code>, or if <code class="code">dstoff</code> and <code class="code">len</code>
    do not designate a valid range of <code class="code">dst</code>.</li>
</ul>
</div>

<pre><span id="VALblit_string"><span class="keyword">val</span> blit_string</span> : <code class="type">src:string -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">blit&nbsp;src&nbsp;srcoff&nbsp;dst&nbsp;dstoff&nbsp;len</code> copies <code class="code">len</code> bytes from string
    <code class="code">src</code>, starting at index <code class="code">srcoff</code>, to byte sequence <code class="code">dst</code>,
    starting at index <code class="code">dstoff</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05.0</li>
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">srcoff</code> and <code class="code">len</code> do not
    designate a valid range of <code class="code">src</code>, or if <code class="code">dstoff</code> and <code class="code">len</code>
    do not designate a valid range of <code class="code">dst</code>.</li>
</ul>
</div>

<pre><span id="VALconcat"><span class="keyword">val</span> concat</span> : <code class="type">sep:bytes -> bytes list -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">concat&nbsp;sep&nbsp;sl</code> concatenates the list of byte sequences <code class="code">sl</code>,
    inserting the separator byte sequence <code class="code">sep</code> between each, and
    returns the result as a new byte sequence.</p>
</div>
</div>

<pre><span id="VALcat"><span class="keyword">val</span> cat</span> : <code class="type">bytes -> bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">cat&nbsp;s1&nbsp;s2</code> concatenates <code class="code">s1</code> and <code class="code">s2</code> and returns the result
    as new byte sequence.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05.0</li>
<li><b>Raises</b> <code>Invalid_argument</code> if the result is longer than
    <a href="Sys.html#VALmax_string_length"><code class="code"><span class="constructor">Sys</span>.max_string_length</code></a> bytes.</li>
</ul>
</div>

<pre><span id="VALiter"><span class="keyword">val</span> iter</span> : <code class="type">f:(char -> unit) -> bytes -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">iter&nbsp;f&nbsp;s</code> applies function <code class="code">f</code> in turn to all the bytes of <code class="code">s</code>.
    It is equivalent to <code class="code">f&nbsp;(get&nbsp;s&nbsp;0);&nbsp;f&nbsp;(get&nbsp;s&nbsp;1);&nbsp;...;&nbsp;f&nbsp;(get&nbsp;s<br>
&nbsp;&nbsp;&nbsp;&nbsp;(length&nbsp;s&nbsp;-&nbsp;1));&nbsp;()</code>.</p>
</div>
</div>

<pre><span id="VALiteri"><span class="keyword">val</span> iteri</span> : <code class="type">f:(int -> char -> unit) -> bytes -> unit</code></pre><div class="info ">
<div class="info-desc">
<p>Same as <a href="Bytes.html#VALiter"><code class="code"><span class="constructor">Bytes</span>.iter</code></a>, but the function is applied to the index of
    the byte as first argument and the byte itself as second
    argument.</p>
</div>
</div>

<pre><span id="VALmap"><span class="keyword">val</span> map</span> : <code class="type">f:(char -> char) -> bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">map&nbsp;f&nbsp;s</code> applies function <code class="code">f</code> in turn to all the bytes of <code class="code">s</code> and
    stores the resulting bytes in a new sequence that is returned as
    the result.</p>
</div>
</div>

<pre><span id="VALmapi"><span class="keyword">val</span> mapi</span> : <code class="type">f:(int -> char -> char) -> bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">mapi&nbsp;f&nbsp;s</code> calls <code class="code">f</code> with each character of <code class="code">s</code> and its
    index (in increasing index order) and stores the resulting bytes
    in a new sequence that is returned as the result.</p>
</div>
</div>

<pre><span id="VALtrim"><span class="keyword">val</span> trim</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p>Return a copy of the argument, without leading and trailing
    whitespace. The bytes regarded as whitespace are the ASCII
    characters <code class="code"><span class="string">'&nbsp;'</span></code>, <code class="code"><span class="string">'\012'</span></code>, <code class="code"><span class="string">'\n'</span></code>, <code class="code"><span class="string">'\r'</span></code>, and <code class="code"><span class="string">'\t'</span></code>.</p>
</div>
</div>

<pre><span id="VALescaped"><span class="keyword">val</span> escaped</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p>Return a copy of the argument, with special characters represented
    by escape sequences, following the lexical conventions of OCaml.</p>
</div>
</div>

<pre><span id="VALindex"><span class="keyword">val</span> index</span> : <code class="type">bytes -> char -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">index&nbsp;s&nbsp;c</code> returns the index of the first occurrence of byte <code class="code">c</code>
    in <code class="code">s</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Not_found</code> if <code class="code">c</code> does not occur in <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALindex_opt"><span class="keyword">val</span> index_opt</span> : <code class="type">bytes -> char -> int option</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">index_opt&nbsp;s&nbsp;c</code> returns the index of the first occurrence of byte <code class="code">c</code>
    in <code class="code">s</code> or <code class="code"><span class="constructor">None</span></code> if <code class="code">c</code> does not occur in <code class="code">s</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05</li>
</ul>
</div>

<pre><span id="VALrindex"><span class="keyword">val</span> rindex</span> : <code class="type">bytes -> char -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">rindex&nbsp;s&nbsp;c</code> returns the index of the last occurrence of byte <code class="code">c</code>
    in <code class="code">s</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Not_found</code> if <code class="code">c</code> does not occur in <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALrindex_opt"><span class="keyword">val</span> rindex_opt</span> : <code class="type">bytes -> char -> int option</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">rindex_opt&nbsp;s&nbsp;c</code> returns the index of the last occurrence of byte <code class="code">c</code>
    in <code class="code">s</code> or <code class="code"><span class="constructor">None</span></code> if <code class="code">c</code> does not occur in <code class="code">s</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05</li>
</ul>
</div>

<pre><span id="VALindex_from"><span class="keyword">val</span> index_from</span> : <code class="type">bytes -> int -> char -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">index_from&nbsp;s&nbsp;i&nbsp;c</code> returns the index of the first occurrence of
    byte <code class="code">c</code> in <code class="code">s</code> after position <code class="code">i</code>.  <code class="code"><span class="constructor">Bytes</span>.index&nbsp;s&nbsp;c</code> is
    equivalent to <code class="code"><span class="constructor">Bytes</span>.index_from&nbsp;s&nbsp;0&nbsp;c</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b><ul><li><code>Invalid_argument</code> if <code class="code">i</code> is not a valid position in <code class="code">s</code>.</li>
<li><code>Not_found</code> if <code class="code">c</code> does not occur in <code class="code">s</code> after position <code class="code">i</code>.</li>
</ul></li>
</ul>
</div>

<pre><span id="VALindex_from_opt"><span class="keyword">val</span> index_from_opt</span> : <code class="type">bytes -> int -> char -> int option</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">index_from&nbsp;_opts&nbsp;i&nbsp;c</code> returns the index of the first occurrence of
    byte <code class="code">c</code> in <code class="code">s</code> after position <code class="code">i</code> or <code class="code"><span class="constructor">None</span></code> if <code class="code">c</code> does not occur in <code class="code">s</code>
    after position <code class="code">i</code>.
    <code class="code"><span class="constructor">Bytes</span>.index_opt&nbsp;s&nbsp;c</code> is equivalent to <code class="code"><span class="constructor">Bytes</span>.index_from_opt&nbsp;s&nbsp;0&nbsp;c</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05</li>
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">i</code> is not a valid position in <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALrindex_from"><span class="keyword">val</span> rindex_from</span> : <code class="type">bytes -> int -> char -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">rindex_from&nbsp;s&nbsp;i&nbsp;c</code> returns the index of the last occurrence of
    byte <code class="code">c</code> in <code class="code">s</code> before position <code class="code">i+1</code>.  <code class="code">rindex&nbsp;s&nbsp;c</code> is equivalent
    to <code class="code">rindex_from&nbsp;s&nbsp;(<span class="constructor">Bytes</span>.length&nbsp;s&nbsp;-&nbsp;1)&nbsp;c</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b><ul><li><code>Invalid_argument</code> if <code class="code">i+1</code> is not a valid position in <code class="code">s</code>.</li>
<li><code>Not_found</code> if <code class="code">c</code> does not occur in <code class="code">s</code> before position <code class="code">i+1</code>.</li>
</ul></li>
</ul>
</div>

<pre><span id="VALrindex_from_opt"><span class="keyword">val</span> rindex_from_opt</span> : <code class="type">bytes -> int -> char -> int option</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">rindex_from_opt&nbsp;s&nbsp;i&nbsp;c</code> returns the index of the last occurrence
    of byte <code class="code">c</code> in <code class="code">s</code> before position <code class="code">i+1</code> or <code class="code"><span class="constructor">None</span></code> if <code class="code">c</code> does not
    occur in <code class="code">s</code> before position <code class="code">i+1</code>.  <code class="code">rindex_opt&nbsp;s&nbsp;c</code> is equivalent to
    <code class="code">rindex_from&nbsp;s&nbsp;(<span class="constructor">Bytes</span>.length&nbsp;s&nbsp;-&nbsp;1)&nbsp;c</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05</li>
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">i+1</code> is not a valid position in <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALcontains"><span class="keyword">val</span> contains</span> : <code class="type">bytes -> char -> bool</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">contains&nbsp;s&nbsp;c</code> tests if byte <code class="code">c</code> appears in <code class="code">s</code>.</p>
</div>
</div>

<pre><span id="VALcontains_from"><span class="keyword">val</span> contains_from</span> : <code class="type">bytes -> int -> char -> bool</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">contains_from&nbsp;s&nbsp;start&nbsp;c</code> tests if byte <code class="code">c</code> appears in <code class="code">s</code> after
    position <code class="code">start</code>.  <code class="code">contains&nbsp;s&nbsp;c</code> is equivalent to <code class="code">contains_from<br>
&nbsp;&nbsp;&nbsp;&nbsp;s&nbsp;0&nbsp;c</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">start</code> is not a valid position in <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALrcontains_from"><span class="keyword">val</span> rcontains_from</span> : <code class="type">bytes -> int -> char -> bool</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">rcontains_from&nbsp;s&nbsp;stop&nbsp;c</code> tests if byte <code class="code">c</code> appears in <code class="code">s</code> before
    position <code class="code">stop+1</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code class="code">stop&nbsp;&lt;&nbsp;0</code> or <code class="code">stop+1</code> is not a valid
    position in <code class="code">s</code>.</li>
</ul>
</div>

<pre><span id="VALuppercase"><span class="keyword">val</span> uppercase</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-deprecated">
<span class="warning">Deprecated.</span>Functions operating on Latin-1 character set are deprecated.</div>
<div class="info-desc">
<p>Return a copy of the argument, with all lowercase letters
   translated to uppercase, including accented letters of the ISO
   Latin-1 (8859-1) character set.</p>
</div>
</div>

<pre><span id="VALlowercase"><span class="keyword">val</span> lowercase</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-deprecated">
<span class="warning">Deprecated.</span>Functions operating on Latin-1 character set are deprecated.</div>
<div class="info-desc">
<p>Return a copy of the argument, with all uppercase letters
   translated to lowercase, including accented letters of the ISO
   Latin-1 (8859-1) character set.</p>
</div>
</div>

<pre><span id="VALcapitalize"><span class="keyword">val</span> capitalize</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-deprecated">
<span class="warning">Deprecated.</span>Functions operating on Latin-1 character set are deprecated.</div>
<div class="info-desc">
<p>Return a copy of the argument, with the first character set to uppercase,
   using the ISO Latin-1 (8859-1) character set..</p>
</div>
</div>

<pre><span id="VALuncapitalize"><span class="keyword">val</span> uncapitalize</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-deprecated">
<span class="warning">Deprecated.</span>Functions operating on Latin-1 character set are deprecated.</div>
<div class="info-desc">
<p>Return a copy of the argument, with the first character set to lowercase,
   using the ISO Latin-1 (8859-1) character set..</p>
</div>
</div>

<pre><span id="VALuppercase_ascii"><span class="keyword">val</span> uppercase_ascii</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p>Return a copy of the argument, with all lowercase letters
   translated to uppercase, using the US-ASCII character set.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05.0</li>
</ul>
</div>

<pre><span id="VALlowercase_ascii"><span class="keyword">val</span> lowercase_ascii</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p>Return a copy of the argument, with all uppercase letters
   translated to lowercase, using the US-ASCII character set.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05.0</li>
</ul>
</div>

<pre><span id="VALcapitalize_ascii"><span class="keyword">val</span> capitalize_ascii</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p>Return a copy of the argument, with the first character set to uppercase,
   using the US-ASCII character set.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05.0</li>
</ul>
</div>

<pre><span id="VALuncapitalize_ascii"><span class="keyword">val</span> uncapitalize_ascii</span> : <code class="type">bytes -> bytes</code></pre><div class="info ">
<div class="info-desc">
<p>Return a copy of the argument, with the first character set to lowercase,
   using the US-ASCII character set.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05.0</li>
</ul>
</div>

<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> = <code class="type">bytes</code> </pre>
<div class="info ">
<div class="info-desc">
<p>An alias for the type of byte sequences.</p>
</div>
</div>


<pre><span id="VALcompare"><span class="keyword">val</span> compare</span> : <code class="type"><a href="BytesLabels.html#TYPEt">t</a> -> <a href="BytesLabels.html#TYPEt">t</a> -> int</code></pre><div class="info ">
<div class="info-desc">
<p>The comparison function for byte sequences, with the same
    specification as <a href="Stdlib.html#VALcompare"><code class="code">compare</code></a>.  Along with the type <code class="code">t</code>,
    this function <code class="code">compare</code> allows the module <code class="code"><span class="constructor">Bytes</span></code> to be passed as
    argument to the functors <a href="Set.Make.html"><code class="code"><span class="constructor">Set</span>.<span class="constructor">Make</span></code></a> and <a href="Map.Make.html"><code class="code"><span class="constructor">Map</span>.<span class="constructor">Make</span></code></a>.</p>
</div>
</div>

<pre><span id="VALequal"><span class="keyword">val</span> equal</span> : <code class="type"><a href="BytesLabels.html#TYPEt">t</a> -> <a href="BytesLabels.html#TYPEt">t</a> -> bool</code></pre><div class="info ">
<div class="info-desc">
<p>The equality function for byte sequences.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05.0</li>
</ul>
</div>
<h2 id="1_Iterators">Iterators</h2>
<pre><span id="VALto_seq"><span class="keyword">val</span> to_seq</span> : <code class="type"><a href="BytesLabels.html#TYPEt">t</a> -> char <a href="Seq.html#TYPEt">Seq.t</a></code></pre><div class="info ">
<div class="info-desc">
<p>Iterate on the string, in increasing index order. Modifications of the
    string during iteration will be reflected in the iterator.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.07</li>
</ul>
</div>

<pre><span id="VALto_seqi"><span class="keyword">val</span> to_seqi</span> : <code class="type"><a href="BytesLabels.html#TYPEt">t</a> -> (int * char) <a href="Seq.html#TYPEt">Seq.t</a></code></pre><div class="info ">
<div class="info-desc">
<p>Iterate on the string, in increasing order, yielding indices along chars</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.07</li>
</ul>
</div>

<pre><span id="VALof_seq"><span class="keyword">val</span> of_seq</span> : <code class="type">char <a href="Seq.html#TYPEt">Seq.t</a> -> <a href="BytesLabels.html#TYPEt">t</a></code></pre><div class="info ">
<div class="info-desc">
<p>Create a string from the generator</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.07</li>
</ul>
</div>
<h2 id="1_Binaryencodingdecodingofintegers">Binary encoding/decoding of integers</h2><p>The functions in this section binary encode and decode integers to
    and from byte sequences.</p>

<p>All following functions raise <code class="code"><span class="constructor">Invalid_argument</span></code> if the space
    needed at index <code class="code">i</code> to decode or encode the integer is not
    available.</p>

<p>Little-endian (resp. big-endian) encoding means that least
    (resp. most) significant bytes are stored first.  Big-endian is
    also known as network byte order.  Native-endian encoding is
    either little-endian or big-endian depending on <a href="Sys.html#VALbig_endian"><code class="code"><span class="constructor">Sys</span>.big_endian</code></a>.</p>

<p>32-bit and 64-bit integers are represented by the <code class="code">int32</code> and
    <code class="code">int64</code> types, which can be interpreted either as signed or
    unsigned numbers.</p>

<p>8-bit and 16-bit integers are represented by the <code class="code">int</code> type,
    which has more bits than the binary encoding.  These extra bits
    are handled as follows:</p>
<ul>
<li>Functions that decode signed (resp. unsigned) 8-bit or 16-bit
    integers represented by <code class="code">int</code> values sign-extend
    (resp. zero-extend) their result.</li>
<li>Functions that encode 8-bit or 16-bit integers represented by
    <code class="code">int</code> values truncate their input to their least significant
    bytes.</li>
</ul>

<pre><span id="VALget_uint8"><span class="keyword">val</span> get_uint8</span> : <code class="type">bytes -> int -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_uint8&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s unsigned 8-bit integer starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int8"><span class="keyword">val</span> get_int8</span> : <code class="type">bytes -> int -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int8&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s signed 8-bit integer starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_uint16_ne"><span class="keyword">val</span> get_uint16_ne</span> : <code class="type">bytes -> int -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_uint16_ne&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s native-endian unsigned 16-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_uint16_be"><span class="keyword">val</span> get_uint16_be</span> : <code class="type">bytes -> int -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_uint16_be&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s big-endian unsigned 16-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_uint16_le"><span class="keyword">val</span> get_uint16_le</span> : <code class="type">bytes -> int -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_uint16_le&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s little-endian unsigned 16-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int16_ne"><span class="keyword">val</span> get_int16_ne</span> : <code class="type">bytes -> int -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int16_ne&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s native-endian signed 16-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int16_be"><span class="keyword">val</span> get_int16_be</span> : <code class="type">bytes -> int -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int16_be&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s big-endian signed 16-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int16_le"><span class="keyword">val</span> get_int16_le</span> : <code class="type">bytes -> int -> int</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int16_le&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s little-endian signed 16-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int32_ne"><span class="keyword">val</span> get_int32_ne</span> : <code class="type">bytes -> int -> int32</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int32_ne&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s native-endian 32-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int32_be"><span class="keyword">val</span> get_int32_be</span> : <code class="type">bytes -> int -> int32</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int32_be&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s big-endian 32-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int32_le"><span class="keyword">val</span> get_int32_le</span> : <code class="type">bytes -> int -> int32</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int32_le&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s little-endian 32-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int64_ne"><span class="keyword">val</span> get_int64_ne</span> : <code class="type">bytes -> int -> int64</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int64_ne&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s native-endian 64-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int64_be"><span class="keyword">val</span> get_int64_be</span> : <code class="type">bytes -> int -> int64</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int64_be&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s big-endian 64-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALget_int64_le"><span class="keyword">val</span> get_int64_le</span> : <code class="type">bytes -> int -> int64</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">get_int64_le&nbsp;b&nbsp;i</code> is <code class="code">b</code>'s little-endian 64-bit integer
    starting at byte index <code class="code">i</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_uint8"><span class="keyword">val</span> set_uint8</span> : <code class="type">bytes -> int -> int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_uint8&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s unsigned 8-bit integer starting at byte index
    <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int8"><span class="keyword">val</span> set_int8</span> : <code class="type">bytes -> int -> int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int8&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s signed 8-bit integer starting at byte index
    <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_uint16_ne"><span class="keyword">val</span> set_uint16_ne</span> : <code class="type">bytes -> int -> int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_uint16_ne&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s native-endian unsigned 16-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_uint16_be"><span class="keyword">val</span> set_uint16_be</span> : <code class="type">bytes -> int -> int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_uint16_be&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s big-endian unsigned 16-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_uint16_le"><span class="keyword">val</span> set_uint16_le</span> : <code class="type">bytes -> int -> int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_uint16_le&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s little-endian unsigned 16-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int16_ne"><span class="keyword">val</span> set_int16_ne</span> : <code class="type">bytes -> int -> int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int16_ne&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s native-endian signed 16-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int16_be"><span class="keyword">val</span> set_int16_be</span> : <code class="type">bytes -> int -> int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int16_be&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s big-endian signed 16-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int16_le"><span class="keyword">val</span> set_int16_le</span> : <code class="type">bytes -> int -> int -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int16_le&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s little-endian signed 16-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int32_ne"><span class="keyword">val</span> set_int32_ne</span> : <code class="type">bytes -> int -> int32 -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int32_ne&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s native-endian 32-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int32_be"><span class="keyword">val</span> set_int32_be</span> : <code class="type">bytes -> int -> int32 -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int32_be&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s big-endian 32-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int32_le"><span class="keyword">val</span> set_int32_le</span> : <code class="type">bytes -> int -> int32 -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int32_le&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s little-endian 32-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int64_ne"><span class="keyword">val</span> set_int64_ne</span> : <code class="type">bytes -> int -> int64 -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int64_ne&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s native-endian 64-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int64_be"><span class="keyword">val</span> set_int64_be</span> : <code class="type">bytes -> int -> int64 -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int64_be&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s big-endian 64-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>

<pre><span id="VALset_int64_le"><span class="keyword">val</span> set_int64_le</span> : <code class="type">bytes -> int -> int64 -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">set_int64_le&nbsp;b&nbsp;i&nbsp;v</code> sets <code class="code">b</code>'s little-endian 64-bit integer
    starting at byte index <code class="code">i</code> to <code class="code">v</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08</li>
</ul>
</div>
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