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.TH fmt_ip4 3
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.SH NAME
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fmt_ip4 \- write a formatted ASCII representation of an IPv4 number
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.SH SYNTAX
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.B #include <ip4.h>
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unsigned int \fBfmt_ip4\fP(char *\fIdest\fR,const char \fIip\fR[4]);
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.SH DESCRIPTION
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fmt_ip4 formats an IPv4 number in dotted-decimal ASCII representation
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from \fIip\fR and writes the result into \fIdest\fR. It returns the
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number of bytes written.
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If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_ip4 returns the number
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of bytes it would have written.
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fmt_ip4 does not append \\0.
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For convenience, ip4.h defines the integer IP4_FMT to be big enough to
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contain every possible fmt_ip4 output plus \\0.
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.SH EXAMPLE
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#include <ip4.h>
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char buf[IP4_FMT];
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char ip[4];
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buf[fmt_ip4(buf,ip)]=0;
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.SH "SEE ALSO"
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scan_ip4(3), fmt_ip6(3)
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