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<!doctype html>
<html class="no-js" lang="en" data-content_root="../">
<head><meta charset="utf-8"/>
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<article role="main" id="furo-main-content">
<section id="stream">
<h1>Stream<a class="headerlink" href="#stream" title="Link to this heading">¶</a></h1>
<p>Qualified name: <code class="docutils literal notranslate"><span class="pre">delphivcl.Stream</span></code></p>
<dl class="py class">
<dt class="sig sig-object py" id="delphivcl.Stream">
<em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-name descname"><span class="pre">Stream</span></span><a class="headerlink" href="#delphivcl.Stream" title="Link to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="delphivcl.Object.html#delphivcl.Object" title="delphivcl.Object"><code class="xref py py-class docutils literal notranslate"><span class="pre">Object</span></code></a></p>
<p>TStream is the base class type for stream objects that can read from or write to various kinds of storage media, such as disk files, dynamic memory, and so on.
Use specialized stream objects to read from, write to, or copy information stored in a particular medium. Each descendant of TStream implements methods for transferring information to and from a particular storage medium, such as a disk file, dynamic memory, and so on. In addition to methods for reading, writing, and copying bytes to and from the stream, stream objects permit applications to seek to an arbitrary position in the stream. Properties of TStream provide information about the stream, such as its size and the current position in the stream.
TStream also introduces methods that work in conjunction with components and filers for loading and saving components in simple and inherited forms. These methods are called automatically by global routines that initiate component streaming. They can also be called directly to initiate the streaming process. Note, however, that component streaming always involves two additional objects:</p>
<p>A component object that is passed as a parameter to the stream’s methods.
A filer object that is automatically created by the stream, and associated with the stream.
Descendant stream objects, such as memory and file streams used for component streaming, are created automatically by the global functions ReadComponentRes and WriteComponentRes. For streaming other kinds of information, choose a descendent class according to the specific data and storage needs. These include:</p>
<p>TFileStream – for working with files.
TStringStream – for manipulating in-memory strings.
TMemoryStream – for working with a memory buffer.
TWinSocketStream – for reading and writing over a socket connection.
TOleStream – for using a COM interface to read and write.</p>
<p class="rubric">Methods</p>
<div class="table-wrapper autosummary longtable docutils container">
<table class="autosummary longtable docutils align-default">
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.CopyFrom" title="delphivcl.Stream.CopyFrom"><code class="xref py py-obj docutils literal notranslate"><span class="pre">CopyFrom</span></code></a></p></td>
<td><p>TStream.CopyFrom(Source: Stream, Count: int, BufferSize: int) -> int Copies a specified number of bytes from one stream to another.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.FixupResourceHeader" title="delphivcl.Stream.FixupResourceHeader"><code class="xref py py-obj docutils literal notranslate"><span class="pre">FixupResourceHeader</span></code></a></p></td>
<td><p>TStream.FixupResourceHeader(FixupInfo: int) -> None Patches the resource header for a resource that has been written to the stream.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.Read" title="delphivcl.Stream.Read"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Read</span></code></a></p></td>
<td><p>TStream.Read(Buffer, Count: int) -> int Methods responsible for reading up to Count bytes of data from the stream into Buffer.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.Read64" title="delphivcl.Stream.Read64"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Read64</span></code></a></p></td>
<td><p>TStream.Read64(Buffer: tuple, Offset: int, Count: int) -> int Embarcadero Technologies does not currently have any additional information.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadBuffer" title="delphivcl.Stream.ReadBuffer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadBuffer</span></code></a></p></td>
<td><p>TStream.ReadBuffer(Buffer, Count: int) -> None Reads Count bytes from the stream into Buffer.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadBufferData" title="delphivcl.Stream.ReadBufferData"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadBufferData</span></code></a></p></td>
<td><p>TStream.ReadBufferData(Buffer: bool) -> None Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadBytes" title="delphivcl.Stream.ReadBytes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadBytes</span></code></a></p></td>
<td><p>TPyDelphiStream.ReadBytes() Read content as bytes.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadComponent" title="delphivcl.Stream.ReadComponent"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadComponent</span></code></a></p></td>
<td><p>TStream.ReadComponent(Instance: Component) -> Component Initiates streaming of components and their properties.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadComponentRes" title="delphivcl.Stream.ReadComponentRes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadComponentRes</span></code></a></p></td>
<td><p>TStream.ReadComponentRes(Instance: Component) -> Component Reads components and their properties from a stream in a resource file format.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadData" title="delphivcl.Stream.ReadData"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadData</span></code></a></p></td>
<td><p>TStream.ReadData(Buffer: Pointer, Count: int) -> int Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadFloat" title="delphivcl.Stream.ReadFloat"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadFloat</span></code></a></p></td>
<td><p>TPyDelphiStream.ReadFloat() Read content as float.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadInt" title="delphivcl.Stream.ReadInt"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadInt</span></code></a></p></td>
<td><p>TPyDelphiStream.ReadInt() Read content as integer.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadResHeader" title="delphivcl.Stream.ReadResHeader"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadResHeader</span></code></a></p></td>
<td><p>Reads a resource-file header from the stream.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.ReadString" title="delphivcl.Stream.ReadString"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ReadString</span></code></a></p></td>
<td><p>TPyDelphiStream.ReadString() Read content as string.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.Seek" title="delphivcl.Stream.Seek"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Seek</span></code></a></p></td>
<td><p>TStream.Seek(Offset: int, Origin: int) -> int Moves to a specified position in the streamed resource.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.Seek32" title="delphivcl.Stream.Seek32"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Seek32</span></code></a></p></td>
<td><p>TStream.Seek32(Offset: int, Origin: SeekOrigin) -> int Embarcadero Technologies does not currently have any additional information.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.Write" title="delphivcl.Stream.Write"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Write</span></code></a></p></td>
<td><p>TStream.Write(Buffer, Count: int) -> int Methods responsible for writing up to Count bytes from Buffer to the stream.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.Write64" title="delphivcl.Stream.Write64"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Write64</span></code></a></p></td>
<td><p>TStream.Write64(Buffer: tuple, Offset: int, Count: int) -> int Embarcadero Technologies does not currently have any additional information.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteBuffer" title="delphivcl.Stream.WriteBuffer"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteBuffer</span></code></a></p></td>
<td><p>TStream.WriteBuffer(Buffer, Count: int) -> None Writes Count bytes from Buffer onto the stream.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteBufferData" title="delphivcl.Stream.WriteBufferData"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteBufferData</span></code></a></p></td>
<td><p>TStream.WriteBufferData(Buffer: int, Count: int) -> None Writes up to 4 four or Count bytes from Buffer onto the stream.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteBytes" title="delphivcl.Stream.WriteBytes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteBytes</span></code></a></p></td>
<td><p>TPyDelphiStream.WriteBytes() Write content as bytes.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteComponent" title="delphivcl.Stream.WriteComponent"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteComponent</span></code></a></p></td>
<td><p>TStream.WriteComponent(Instance: Component) -> None Initiates the writing of components and their properties to a stream.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteComponentRes" title="delphivcl.Stream.WriteComponentRes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteComponentRes</span></code></a></p></td>
<td><p>TStream.WriteComponentRes(ResName: str, Instance: Component) -> None Writes components and their properties to a stream from a resource file format.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteData" title="delphivcl.Stream.WriteData"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteData</span></code></a></p></td>
<td><p>TStream.WriteData(Buffer: tuple, Count: int) -> int Methods responsible for writing up to Count bytes from Buffer to the stream.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteDescendent" title="delphivcl.Stream.WriteDescendent"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteDescendent</span></code></a></p></td>
<td><p>TStream.WriteDescendent(Instance: Component, Ancestor: Component) -> None Streams components and their properties in inherited forms.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteDescendentRes" title="delphivcl.Stream.WriteDescendentRes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteDescendentRes</span></code></a></p></td>
<td><p>TStream.WriteDescendentRes(ResName: str, Instance: Component, Ancestor: Component) -> None Streams components and their properties in inherited forms.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteFloat" title="delphivcl.Stream.WriteFloat"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteFloat</span></code></a></p></td>
<td><p>TPyDelphiStream.WriteFloat() Write content as float.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteInt" title="delphivcl.Stream.WriteInt"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteInt</span></code></a></p></td>
<td><p>TPyDelphiStream.WriteInt() Write content as integer.</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteResourceHeader" title="delphivcl.Stream.WriteResourceHeader"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteResourceHeader</span></code></a></p></td>
<td><p>TStream.WriteResourceHeader(ResName: str, FixupInfo: int) -> None Writes a resource-file header to the stream.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.WriteString" title="delphivcl.Stream.WriteString"><code class="xref py py-obj docutils literal notranslate"><span class="pre">WriteString</span></code></a></p></td>
<td><p>TPyDelphiStream.WriteString() Write content as string.</p></td>
</tr>
</tbody>
</table>
</div>
<p class="rubric">Attributes</p>
<div class="table-wrapper autosummary longtable docutils container">
<table class="autosummary longtable docutils align-default">
<tbody>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.Capabilities" title="delphivcl.Stream.Capabilities"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Capabilities</span></code></a></p></td>
<td><p>StreamCapabilities:</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.ClassName" title="delphivcl.Stream.ClassName"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ClassName</span></code></a></p></td>
<td><p>Returns the TObject.ClassName</p></td>
</tr>
<tr class="row-odd"><td><p><a class="reference internal" href="#delphivcl.Stream.Position" title="delphivcl.Stream.Position"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Position</span></code></a></p></td>
<td><p>Indicates the current offset into the stream for reading and writing.</p></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="#delphivcl.Stream.Size" title="delphivcl.Stream.Size"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Size</span></code></a></p></td>
<td><p>Indicates the size in bytes of the stream.</p></td>
</tr>
</tbody>
</table>
</div>
<dl class="py attribute">
<dt class="sig sig-object py" id="delphivcl.Stream.Capabilities">
<span class="sig-name descname"><span class="pre">Capabilities</span></span><a class="headerlink" href="#delphivcl.Stream.Capabilities" title="Link to this definition">¶</a></dt>
<dd><p>StreamCapabilities:</p>
</dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="delphivcl.Stream.ClassName">
<span class="sig-name descname"><span class="pre">ClassName</span></span><a class="headerlink" href="#delphivcl.Stream.ClassName" title="Link to this definition">¶</a></dt>
<dd><p>Returns the TObject.ClassName</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.CopyFrom">
<span class="sig-name descname"><span class="pre">CopyFrom</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">Source</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="#delphivcl.Stream" title="delphivcl.Stream"><span class="pre">Stream</span></a></span></em>, <em class="sig-param"><span class="n"><span class="pre">Count</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">BufferSize</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">int</span></span></span><a class="headerlink" href="#delphivcl.Stream.CopyFrom" title="Link to this definition">¶</a></dt>
<dd><p>Copies a specified number of bytes from one stream to another.
Use CopyFrom to copy data from one stream to a different one. Using CopyFrom eliminates the need to create, read into, write from, and free a buffer when copying data.
CopyFrom copies Count bytes from the stream specified by Source into the stream. It then moves the current position by Count bytes and returns the number of bytes copied.
If Count is 0, CopyFrom sets Source position to 0 before reading and then copies the entire contents of Source into the stream. If Count is greater than or less than 0, CopyFrom reads from the current position in Source.
Because the CopyFrom method uses ReadBuffer and WriteBuffer to do the effective copying, if the Count is greater than the SourceStream size, ReadBuffer throws an exception stating that a stream read error has occured.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.FixupResourceHeader">
<span class="sig-name descname"><span class="pre">FixupResourceHeader</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">FixupInfo</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">None</span></span></span><a class="headerlink" href="#delphivcl.Stream.FixupResourceHeader" title="Link to this definition">¶</a></dt>
<dd><p>Patches the resource header for a resource that has been written to the stream.
Do not call FixupResourceHeader� it is used internally. The WriteDescendentRes method calls FixupResourceHeader after writing a component to the stream. This method then uses the current position to determine the size of the resource just written and adjust the resource header accordingly.
The FixupInfo parameter is the value returned by WriteResourceHeader when it writes the resource header (before WriteDescendentRes streams out the component.)</p>
</dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="delphivcl.Stream.Position">
<span class="sig-name descname"><span class="pre">Position</span></span><a class="headerlink" href="#delphivcl.Stream.Position" title="Link to this definition">¶</a></dt>
<dd><p>Indicates the current offset into the stream for reading and writing.
Use Position to obtain the current position of the stream. This is the number of bytes from the beginning of the streamed data.</p>
<dl class="field-list simple">
<dt class="field-odd">Type<span class="colon">:</span></dt>
<dd class="field-odd"><p>int</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.Read">
<span class="sig-name descname"><span class="pre">Read</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">Buffer</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">Count</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">int</span></span></span><a class="headerlink" href="#delphivcl.Stream.Read" title="Link to this definition">¶</a></dt>
<dd><p>Methods responsible for reading up to Count bytes of data from the stream into Buffer.
Descendant stream classes can define its own Read methods that read data from its particular storage medium (such as memory or a disk file) into a Buffer buffer.
Read is used in cases where the number of bytes to read from the stream is not necessarily fixed.
Read attempts to read, into Buffer, up to Count bytes from the stream, starting at the current position, and then advances the current position in the stream by the number of bytes actually transferred. Read returns the number of bytes actually read, which may be less than Count.
Offset specifies a zero-based position in Buffer from which to write the first byte into Buffer.
All the other data-reading methods of a stream (ReadBuffer, ReadData) call Read to do their actual reading.
Methods responsible for reading up to Count bytes of data from the stream into Buffer.
Descendant stream classes can define its own Read methods that read data from its particular storage medium (such as memory or a disk file) into a Buffer buffer.
Read is used in cases where the number of bytes to read from the stream is not necessarily fixed.
Read attempts to read, into Buffer, up to Count bytes from the stream, starting at the current position, and then advances the current position in the stream by the number of bytes actually transferred. Read returns the number of bytes actually read, which may be less than Count.
Offset specifies a zero-based position in Buffer from which to write the first byte into Buffer.
All the other data-reading methods of a stream (ReadBuffer, ReadData) call Read to do their actual reading.
Methods responsible for reading up to Count bytes of data from the stream into Buffer.
Descendant stream classes can define its own Read methods that read data from its particular storage medium (such as memory or a disk file) into a Buffer buffer.
Read is used in cases where the number of bytes to read from the stream is not necessarily fixed.
Read attempts to read, into Buffer, up to Count bytes from the stream, starting at the current position, and then advances the current position in the stream by the number of bytes actually transferred. Read returns the number of bytes actually read, which may be less than Count.
Offset specifies a zero-based position in Buffer from which to write the first byte into Buffer.
All the other data-reading methods of a stream (ReadBuffer, ReadData) call Read to do their actual reading.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.Read64">
<span class="sig-name descname"><span class="pre">Read64</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">Buffer</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">tuple</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">Offset</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">Count</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">int</span></span></span><a class="headerlink" href="#delphivcl.Stream.Read64" title="Link to this definition">¶</a></dt>
<dd><p>Embarcadero Technologies does not currently have any additional information.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.ReadBuffer">
<span class="sig-name descname"><span class="pre">ReadBuffer</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">Buffer</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">Count</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">None</span></span></span><a class="headerlink" href="#delphivcl.Stream.ReadBuffer" title="Link to this definition">¶</a></dt>
<dd><p>Reads Count bytes from the stream into Buffer.
Use ReadBuffer to read Count bytes from the stream into a Buffer buffer in cases where the number of bytes to read is known and fixed, for example when reading in structures. ReadBuffer is used internally for loading from a stream and copying from a stream.
Read attempts to read exactly Count bytes from the stream, starting at the current position, and then advances the current position in the stream by the number of bytes actually transferred.
Offset specifies a zero-based position in Buffer from which to write the first byte into Buffer.
ReadBuffer calls Read to do the actual reading. If Count bytes cannot be read from the stream, an EReadError exception is raised.
Reads Count bytes from the stream into Buffer.
Use ReadBuffer to read Count bytes from the stream into a Buffer buffer in cases where the number of bytes to read is known and fixed, for example when reading in structures. ReadBuffer is used internally for loading from a stream and copying from a stream.
Read attempts to read exactly Count bytes from the stream, starting at the current position, and then advances the current position in the stream by the number of bytes actually transferred.
Offset specifies a zero-based position in Buffer from which to write the first byte into Buffer.
ReadBuffer calls Read to do the actual reading. If Count bytes cannot be read from the stream, an EReadError exception is raised.
Reads Count bytes from the stream into Buffer.
Use ReadBuffer to read Count bytes from the stream into a Buffer buffer in cases where the number of bytes to read is known and fixed, for example when reading in structures. ReadBuffer is used internally for loading from a stream and copying from a stream.
Read attempts to read exactly Count bytes from the stream, starting at the current position, and then advances the current position in the stream by the number of bytes actually transferred.
Offset specifies a zero-based position in Buffer from which to write the first byte into Buffer.
ReadBuffer calls Read to do the actual reading. If Count bytes cannot be read from the stream, an EReadError exception is raised.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.ReadBufferData">
<span class="sig-name descname"><span class="pre">ReadBufferData</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">Buffer</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">bool</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">None</span></span></span><a class="headerlink" href="#delphivcl.Stream.ReadBufferData" title="Link to this definition">¶</a></dt>
<dd><p>Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.
Methods responsible for reading fixed Count or SizeOf(Buffer) number of bytes from the stream into Buffer.
Use ReadBufferData to read exactly the fixed Count or SizeOf(Buffer) number of bytes from the stream into a typed Buffer. ReadBufferData raises an EReadError exception if ReadBufferData cannot read exactly the specified number of bytes.
ReadBufferData works using the following algorithms:</p>
<p>When ReadBufferData does not have the Count parameter, then ReadBufferData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. If the number of bytes transferred is not = SizeOf(Buffer), then ReadBufferData raises an EReadError exception.
When ReadBufferData has the Count parameter, then ReadBufferData calls ReadData to read the Count bytes. If a reported number of transferred bytes is not equal to Count, then ReadBufferData raises an EReadError exception.
ReadBufferData calls ReadData to do the actual reading.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.ReadBytes">
<span class="sig-name descname"><span class="pre">ReadBytes</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#delphivcl.Stream.ReadBytes" title="Link to this definition">¶</a></dt>
<dd><p>Read content as bytes.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.ReadComponent">
<span class="sig-name descname"><span class="pre">ReadComponent</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">Instance</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="delphivcl.Component.html#delphivcl.Component" title="delphivcl.Component"><span class="pre">Component</span></a></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference internal" href="delphivcl.Component.html#delphivcl.Component" title="delphivcl.Component"><span class="pre">Component</span></a></span></span><a class="headerlink" href="#delphivcl.Stream.ReadComponent" title="Link to this definition">¶</a></dt>
<dd><p>Initiates streaming of components and their properties.
ReadComponent is called indirectly by the global routine ReadComponentRes, by the ReadComponentRes method, or it can be called directly to initiate component streaming.
ReadComponent reads data values from the stream and assigns them to Instance’s properties. It then constructs a reader object and calls the reader’s ReadRootComponent method to read the Instance’s property values and construct child objects defined in the stream as children of Instance. ReadComponent returns the component.
If Instance is nil (Delphi) or NULL (C++), ReadComponent constructs a component based on the type information in the stream and returns the newly-constructed component.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.ReadComponentRes">
<span class="sig-name descname"><span class="pre">ReadComponentRes</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">Instance</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="delphivcl.Component.html#delphivcl.Component" title="delphivcl.Component"><span class="pre">Component</span></a></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference internal" href="delphivcl.Component.html#delphivcl.Component" title="delphivcl.Component"><span class="pre">Component</span></a></span></span><a class="headerlink" href="#delphivcl.Stream.ReadComponentRes" title="Link to this definition">¶</a></dt>
<dd><p>Reads components and their properties from a stream in a resource file format.
ReadComponentRes is called automatically by the global routine ReadComponentResFile. It can also be called directly if the current position of the stream points to a component written using the WriteComponentRes method.
ReadComponentResFile creates a file stream object, which then calls its ReadComponentRes method.
ReadComponentRes first calls the ReadResHeader method to read a resource header from the stream. If the stream does not contain a resource header at the current position, ReadResHeader will raise an EInvalidImage exception. ReadComponentRes then calls ReadComponent to read the properties that must be set on Instance.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="delphivcl.Stream.ReadData">
<span class="sig-name descname"><span class="pre">ReadData</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">Buffer</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Pointer</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">Count</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">int</span></span></span><a class="headerlink" href="#delphivcl.Stream.ReadData" title="Link to this definition">¶</a></dt>
<dd><p>Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.
ReadData works using the following algorithms:</p>
<p>When ReadData does not have the Count parameter, then ReadData tries to read the SizeOf(Buffer) number of bytes, then advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
When ReadData has the Count parameter, then:
If Count > SizeOf(Buffer), then ReadData tries to read the SizeOf(Buffer) number of bytes. ReadData advances the current position in the stream by Count number of bytes. ReadData returns Count.
If Count <= SizeOf(Buffer), then ReadData tries to read up to the Count number of bytes from the stream. ReadData advances the current position in the stream by the number of bytes transferred. ReadData returns the number of bytes read.
ReadData methods call Read to do their actual reading.
Methods responsible for reading up to Count but not more than SizeOf(Buffer) bytes from the stream into Buffer.
ReadData is used in cases, where the number of bytes to read from the stream is not necessarily fixed.