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<title>encode(3) - Plan 9 from User Space</title>
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<tr><td width=20><td><b>ENCODE(3)</b><td align=right><b>ENCODE(3)</b>
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<p><font size=+1><b>NAME </b></font><br>
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dec64, enc64, dec32, enc32, dec16, enc16, encodefmt – encoding
byte arrays as strings<br>
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<p><font size=+1><b>SYNOPSIS </b></font><br>
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<tt><font size=+1>#include <u.h><br>
#include <libc.h>
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<tt><font size=+1>int dec64(uchar *out, int lim, char *in, int n)
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</font></tt>
<tt><font size=+1>int enc64(char *out, int lim, uchar *in, int n)
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</font></tt>
<tt><font size=+1>int dec32(uchar *out, int lim, char *in, int n)
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</font></tt>
<tt><font size=+1>int enc32(char *out, int lim, uchar *in, int n)
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</font></tt>
<tt><font size=+1>int dec16(uchar *out, int lim, char *in, int n)
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</font></tt>
<tt><font size=+1>int enc16(char *out, int lim, uchar *in, int n)
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</font></tt>
<tt><font size=+1>int encodefmt(Fmt*)<br>
</font></tt>
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<p><font size=+1><b>DESCRIPTION </b></font><br>
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<i>Enc16</i>, <i>enc32</i> and <i>enc64</i> create null terminated strings. They return
the size of the encoded string (without the null) or -1 if the
encoding fails. The encoding fails if <i>lim</i>, the length of the output
buffer, is too small.
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<i>Dec16</i>, <i>dec32</i> and <i>dec64</i> return the number of bytes decoded or -1
if the decoding fails. The decoding fails if the output buffer
is not large enough or, for base 32, if the input buffer length
is not a multiple of 8.
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<i>Encodefmt</i> can be used with <a href="../man3/fmtinstall.html"><i>fmtinstall</i>(3)</a> and <a href="../man3/print.html"><i>print</i>(3)</a> to print
encoded representations of byte arrays. The verbs are<br>
<tt><font size=+1>H</font></tt> base 16 (i.e. hexadecimal). The default encoding is in upper
case. The <tt><font size=+1>l</font></tt> flag forces lower case.<br>
<tt><font size=+1><</font></tt> base 32<br>
<tt><font size=+1>[</font></tt> base 64 (same as MIME)
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The length of the array is specified as <i>f2</i>. For example, to display
a 15 byte array as hex:<br>
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<tt><font size=+1>char x[15];<br>
fmtinstall('H', encodefmt);<br>
print("%.*H\n", sizeof x, x);<br>
</font></tt>
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<p><font size=+1><b>SOURCE </b></font><br>
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<tt><font size=+1>/usr/local/plan9/src/lib9/u32.c<br>
/usr/local/plan9/src/lib9/u64.c<br>
</font></tt>
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