gnet-pack.html

GNet是一个简单的网络库。它是目标定向的

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><H3
><A
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>gnet_calcsize ()</H3
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><GTKDOCLINK
HREF="GINT"
>gint</GTKDOCLINK
>        gnet_calcsize                   (const <GTKDOCLINK
HREF="GCHAR"
>gchar</GTKDOCLINK
> *format,
                                             ...);</PRE
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>Calculate the size of the buffer needed to pack the given format.
 All arguments should be passed.</P
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>format</I
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NAME="AEN3488"
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><H3
><A
NAME="GNET-VCALCSIZE"
></A
>gnet_vcalcsize ()</H3
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><GTKDOCLINK
HREF="GINT"
>gint</GTKDOCLINK
>        gnet_vcalcsize                  (const <GTKDOCLINK
HREF="GCHAR"
>gchar</GTKDOCLINK
> *format,
                                             va_list args);</PRE
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><P
>Var arg interface to <A
HREF="gnet-pack.html#GNET-CALCSIZE"
>gnet_calcsize</A
>().  Size <A
HREF="gnet-pack.html#GNET-CALCSIZE"
>gnet_calcsize</A
>() for
 additional information.</P
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>format</I
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>args</I
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><HR><DIV
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><A
NAME="AEN3514"
></A
><H3
><A
NAME="GNET-UNPACK"
></A
>gnet_unpack ()</H3
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CLASS="PROGRAMLISTING"
><GTKDOCLINK
HREF="GINT"
>gint</GTKDOCLINK
>        gnet_unpack                     (const <GTKDOCLINK
HREF="GCHAR"
>gchar</GTKDOCLINK
> *format,
                                             <GTKDOCLINK
HREF="GCHAR"
>gchar</GTKDOCLINK
> *buffer,
                                             <GTKDOCLINK
HREF="GUINT"
>guint</GTKDOCLINK
> len,
                                             ...);</PRE
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><P
>The unpack format string is a list of types.  Each type is
 represented by a character.  Most types can be prefixed by an
 integer, which represents how many times it is repeated (eg,
 "4i2b" is equivalent to "iiiibb".</P
><P
> In unpack, the arguments must be pointers to the appropriate type.
 Strings and byte arrays are allocated dynamicly (by g_new).  The
 caller is responsible for <GTKDOCLINK
HREF="G-FREE"
>g_free</GTKDOCLINK
>()-ing it.</P
><P
> Native size/order is the default.  If the first character of
 FORMAT is &lt; then little endian order and standard size are used.
 If the first character is &gt; or !, then big endian (or network)
 order and standard size are used.  Standard sizes are 1 byte for
 chars, 2 bytes for shorts, and 4 bytes for ints and longs.</P
><P
> x is a pad byte.  The byte is skipped and not stored.  We do not
 check its value.</P
><P
> b/B are signed/unsigned chars</P
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> h/H are signed/unsigned shorts (h is from sHort)</P
><P
> i/I are signed/unsigned ints</P
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> l/L are signed/unsigned longs</P
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> f/D are floats/doubles (always native order/size)
   
 v is a void pointer (always native size)</P
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> s is a zero-terminated string.  REPEAT is repeat.</P
><P
> S is a zero-padded string of length REPEAT.  We read REPEAT
 characters or until a NULL character.  Any remaining characters are
 filled in with 0's.  REPEAT must be specified.</P
><P
> r is a byte array of NEXT bytes.  NEXT is the next argument and is
 an integer.  REPEAT is repeat.  (r is from "raw")</P
><P
> R is a byte array of REPEAT bytes.  REPEAT must be specified.</P
><P
> String/byte array memory is allocated by unpack.</P
><P
> Mnemonics: sHort, Integer, Float, Double, Pointer, String, Raw</P
><P
> unpack was mostly inspired by Python's unpack, with some awareness
 of Perl's unpack.</P
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>format</I
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>buffer</I
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>len</I
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>Returns</I
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>&#13;</P
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><A
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></A
><H3
><A
NAME="GNET-VUNPACK"
></A
>gnet_vunpack ()</H3
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><GTKDOCLINK
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>gint</GTKDOCLINK
>        gnet_vunpack                    (const <GTKDOCLINK
HREF="GCHAR"
>gchar</GTKDOCLINK
> *format,
                                             <GTKDOCLINK
HREF="GCHAR"
>gchar</GTKDOCLINK
> *buffer,
                                             <GTKDOCLINK
HREF="GUINT"
>guint</GTKDOCLINK
> len,
                                             va_list args);</PRE
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><P
>Var arg interface to <A
HREF="gnet-pack.html#GNET-UNPACK"
>gnet_unpack</A
>().  See <A
HREF="gnet-pack.html#GNET-UNPACK"
>gnet_unpack</A
>() for format
 information.</P
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>format</I
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>Returns</I
></SPAN
> :</SPAN
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>&#13;</P
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