.\"=============================================================================
.\" Header
.\"
.\" Copyright (c) 2021 Michael Baeuerle
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.TH cl_hp_parse_field 3 2021-11-24 Unix "canlock-hp 3.3.0 manual"
.\"
.\"
.\"=============================================================================
.\" NAME section
.\"
.SH NAME
cl_hp_parse_field - Execute field parser
.\"
.\"
.\"=============================================================================
.\" SYNOPSIS section
.\"
.SH SYNOPSIS
.nf
.B #include <libcanlock-3/canlock-hp.h>
.sp
.BI "char *cl_hp_parse_field(const char *" data ", size_t " data_len );
.\"
.\"
.\"=============================================================================
.\" DESCRIPTION section
.\"
.SH DESCRIPTION
The
.BR cl_hp_parse_field ()
function executes the header field parser.
.br
This implementation executes the
.BR canlock-hfp
utility in a separate process.
.sp
The parameter
.I data
should point to the beginning of the input data.
.br
Specify the length of the input data with the
.I data_len
parameter.
.sp
The input data must be an unfolded "Cancel-Lock" or "Cancel-Key" header field
without line break at the end.
.br
The function
.BR cl_hp_get_field ()
can be used to extract a field from the message header.
.br
The function
.BR cl_hp_unfold_field ()
can be used to remove potential folding from an already extracted header field.
.\"
.\"
.\"=============================================================================
.\" RETURN VALUE section
.\"
.SH RETURN VALUE
If the parser reports success, a pointer to the NUL-terminated output data is
returned. Otherwise,
.B NULL
is returned.
.sp
On success, the caller is responsible to
.BR free ()
the memory block allocated for the output data.
.\"
.\"
.\"=============================================================================
.\" AUTHORS section
.\"
.SH AUTHORS
Michael Baeuerle
.\"
.\"
.\"=============================================================================
.\" REPORTING BUGS section
.\"
.SH REPORTING BUGS
Report bugs to <mailto:michael.baeuerle@gmx.net>.
.\"
.\"
.\"=============================================================================
.\" STANDARDS section
.\"
.SH STANDARDS
.BR cl_hp_parse_field ()
tries to comply with the following standards:
.PP
RFC 8315
.\"
.\"
.\"=============================================================================
.\" SEE ALSO section
.\"
.SH SEE ALSO
.BR free (3),
.BR cl_hp_get_field (3),
.BR cl_hp_unfold_field (3),
.BR canlock-hfp (1),
.BR canlock-mhp (1),
.BR canlock (1)
.\"
.\"
.\" EOF