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ghc-blaze-builder-devel-0.2.1.4-1.fc14.i686.rpm

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>blaze-builder-0.2.1.4: Efficient buffered output.</TD
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><A HREF="src/Blaze-ByteString-Builder-ByteString.html"
>Source code</A
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><FONT SIZE="6"
>Blaze.ByteString.Builder.ByteString</FONT
></TD
><TD ALIGN="right"
><TABLE CLASS="narrow" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="infohead"
>Portability</TD
><TD CLASS="infoval"
>tested on GHC only</TD
></TR
><TR
><TD CLASS="infohead"
>Stability</TD
><TD CLASS="infoval"
>experimental</TD
></TR
><TR
><TD CLASS="infohead"
>Maintainer</TD
><TD CLASS="infoval"
>Simon Meier &lt;iridcode@gmail.com&gt;</TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
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><TD
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="section4"
><B
>Contents</B
></TD
></TR
><TR
><TD
><DL
><DT
><A HREF="#1"
>Strict bytestrings
</A
></DT
><DT
><A HREF="#2"
>Lazy bytestrings
</A
></DT
></DL
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Description</TD
></TR
><TR
><TD CLASS="doc"
><P
><TT
><A HREF="Blaze-ByteString-Builder-Internal-Write.html#t%3AWrite"
>Write</A
></TT
>s and <TT
><A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TT
>s for strict and lazy bytestrings.
</P
><P
>We assume the following qualified imports in order to differentiate between
 strict and lazy bytestrings in the code examples.
</P
><PRE
> import qualified Data.ByteString      as S
 import qualified Data.ByteString.Lazy as L
</PRE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Synopsis</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="#v%3AwriteByteString"
>writeByteString</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Write.html#t%3AWrite"
>Write</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfromByteString"
>fromByteString</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfromByteStringWith"
>fromByteStringWith</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AcopyByteString"
>copyByteString</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AinsertByteString"
>insertByteString</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfromLazyByteString"
>fromLazyByteString</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfromLazyByteStringWith"
>fromLazyByteStringWith</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AcopyLazyByteString"
>copyLazyByteString</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AinsertLazyByteString"
>insertLazyByteString</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="1"
><A NAME="1"
>Strict bytestrings
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:writeByteString"
><A NAME="v%3AwriteByteString"
></A
></A
><B
>writeByteString</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Write.html#t%3AWrite"
>Write</A
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#writeByteString"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Write a strict <TT
><A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
></TT
> to a buffer.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fromByteString"
><A NAME="v%3AfromByteString"
></A
></A
><B
>fromByteString</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#fromByteString"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
>Smart serialization of a strict bytestring.
</P
><PRE
><TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AfromByteString"
>fromByteString</A
></TT
> = <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AfromByteStringWith"
>fromByteStringWith</A
></TT
> <TT
><A HREF="Blaze-ByteString-Builder-Internal.html#v%3AdefaultMaximalCopySize"
>defaultMaximalCopySize</A
></TT
></PRE
><P
>Use this function to serialize strict bytestrings. It guarantees an
 average chunk size of 4kb, which has been shown to be a reasonable size in
 benchmarks. Note that the check whether to copy or to insert is (almost)
 free as the builder performance is mostly memory-bound.
</P
><P
>If you statically know that copying or inserting the strict bytestring is
 always the best choice, then you can use the <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AcopyByteString"
>copyByteString</A
></TT
> or
 <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AinsertByteString"
>insertByteString</A
></TT
> functions. 
</P
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fromByteStringWith"
><A NAME="v%3AfromByteStringWith"
></A
></A
><B
>fromByteStringWith</B
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#fromByteStringWith"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="arg"
>:: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
></TD
><TD CLASS="rdoc"
>Maximal number of bytes to copy.
</TD
></TR
><TR
><TD CLASS="arg"
>-&gt; <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
></TD
><TD CLASS="rdoc"
>Strict <TT
><A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
></TT
> to serialize.
</TD
></TR
><TR
><TD CLASS="arg"
>-&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
><TD CLASS="rdoc"
>Resulting <TT
><A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="ndoc" COLSPAN="2"
><P
><TT
>fromByteStringWith maximalCopySize bs</TT
> serializes the strict bytestring
 <TT
>bs</TT
> according to the following rules.
</P
><DL
><DT
><TT
>S.length bs &lt;= maximalCopySize</TT
>:</DT
><DD
> <TT
>bs</TT
> is copied to the output buffer.
</DD
><DT
><TT
>S.length bs &gt;  maximalCopySize</TT
>:</DT
><DD
> <TT
>bs</TT
> the output buffer is flushed and
   <TT
>bs</TT
> is inserted directly as separate chunk in the output stream.
</DD
></DL
><P
>These rules guarantee that average chunk size in the output stream is at
 least half the <TT
>maximalCopySize</TT
>.
</P
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:copyByteString"
><A NAME="v%3AcopyByteString"
></A
></A
><B
>copyByteString</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#copyByteString"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
><TT
>copyByteString bs</TT
> serialize the strict bytestring <TT
>bs</TT
> by copying it to
 the output buffer. 
</P
><P
>Use this function to serialize strict bytestrings that are statically known
 to be smallish (<TT
>&lt;= 4kb</TT
>).
</P
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:insertByteString"
><A NAME="v%3AinsertByteString"
></A
></A
><B
>insertByteString</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#insertByteString"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
><TT
>insertByteString bs</TT
> serializes the strict bytestring <TT
>bs</TT
> by inserting
 it directly as a chunk of the output stream. 
</P
><P
>Note that this implies flushing the output buffer; even if it contains just
 a single byte. Hence, you should use this operation only for large (<TT
>&gt; 8kb</TT
>)
 bytestrings, as otherwise the resulting output stream may be too fragmented
 to be processed efficiently.
</P
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="2"
><A NAME="2"
>Lazy bytestrings
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fromLazyByteString"
><A NAME="v%3AfromLazyByteString"
></A
></A
><B
>fromLazyByteString</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#fromLazyByteString"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
><EM
>O(n)</EM
>. Smart serialization of a lazy bytestring.
</P
><PRE
><TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AfromLazyByteString"
>fromLazyByteString</A
></TT
> = <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AfromLazyByteStringWith"
>fromLazyByteStringWith</A
></TT
> <TT
><A HREF="Blaze-ByteString-Builder-Internal.html#v%3AdefaultMaximalCopySize"
>defaultMaximalCopySize</A
></TT
></PRE
><P
>Use this function to serialize lazy bytestrings. It guarantees an average
 chunk size of 4kb, which has been shown to be a reasonable size in
 benchmarks. Note that the check whether to copy or to insert is (almost)
 free as the builder performance is mostly memory-bound.
</P
><P
>If you statically know that copying or inserting <EM
>all</EM
> chunks of the lazy
 bytestring is always the best choice, then you can use the
 <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AcopyLazyByteString"
>copyLazyByteString</A
></TT
> or <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AinsertLazyByteString"
>insertLazyByteString</A
></TT
> functions. 
</P
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fromLazyByteStringWith"
><A NAME="v%3AfromLazyByteStringWith"
></A
></A
><B
>fromLazyByteStringWith</B
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#fromLazyByteStringWith"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="arg"
>:: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
></TD
><TD CLASS="rdoc"
>Maximal number of bytes to copy.
</TD
></TR
><TR
><TD CLASS="arg"
>-&gt; <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
></TD
><TD CLASS="rdoc"
>Lazy <TT
><A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
></TT
> to serialize.
</TD
></TR
><TR
><TD CLASS="arg"
>-&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
><TD CLASS="rdoc"
>Resulting <TT
><A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="ndoc" COLSPAN="2"
><P
><EM
>O(n)</EM
>. Serialize a lazy bytestring chunk-wise according to the same rules
 as in <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AfromByteStringWith"
>fromByteStringWith</A
></TT
>.
</P
><P
>Semantically, it holds that
</P
><PRE
>   fromLazyByteStringWith maxCopySize
 = mconcat . map (fromByteStringWith maxCopySize) . L.toChunks
</PRE
><P
>However, the left-hand-side is much more efficient, as it moves the
 end-of-buffer pointer out of the inner loop and provides the compiler with
 more strictness information.
</P
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:copyLazyByteString"
><A NAME="v%3AcopyLazyByteString"
></A
></A
><B
>copyLazyByteString</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#copyLazyByteString"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
><EM
>O(n)</EM
>. Serialize a lazy bytestring by copying <EM
>all</EM
> chunks sequentially
 to the output buffer.
</P
><P
>See <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AcopyByteString"
>copyByteString</A
></TT
> for usage considerations.
</P
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:insertLazyByteString"
><A NAME="v%3AinsertLazyByteString"
></A
></A
><B
>insertLazyByteString</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/bytestring-0.9.1.7/Data-ByteString-Lazy.html#t%3AByteString"
>ByteString</A
> -&gt; <A HREF="Blaze-ByteString-Builder-Internal-Types.html#t%3ABuilder"
>Builder</A
></TD
><TD CLASS="declbut"
><A HREF="src/Blaze-ByteString-Builder-ByteString.html#insertLazyByteString"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
><EM
>O(n)</EM
>. Serialize a lazy bytestring by inserting <EM
>all</EM
> its chunks directly
 into the output stream.
</P
><P
>See <TT
><A HREF="Blaze-ByteString-Builder-ByteString.html#v%3AinsertByteString"
>insertByteString</A
></TT
> for usage considerations.
</P
><P
>For library developers, see the ModifyChunks build signal, if you
 need an <EM
>O(1)</EM
> lazy bytestring insert based on difference lists.
</P
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="botbar"
>Produced by <A HREF="http://www.haskell.org/haddock/"
>Haddock</A
> version 2.6.1</TD
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