.\" Copyright (c) Kristaps Dzonsons <kristaps@bsd.lv>
.\"
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.Dd $Mdocdate$
.Dt LOWDOWN_HTML_NEW 3
.Os
.Sh NAME
.Nm lowdown_html_new
.Nd allocate a Markdown HTML renderer
.Sh LIBRARY
.Lb liblowdown
.Sh SYNOPSIS
.In sys/queue.h
.In stdio.h
.In lowdown.h
.Ft void *
.Fo lowdown_html_new
.Fa "const struct lowdown_opts *opts"
.Fc
.Sh DESCRIPTION
Allocates an HTML5 renderer using
.Fa opts->flags ,
or zero if
.Fa opts
is
.Dv NULL .
This field is documented in
.Xr lowdown 3 .
The returned pointer may be used with multiple invocations of
.Xr lowdown_html_rndr 3
and must be freed with
.Xr lowdown_html_free 3 .
.Pp
The bits recognised in
.Fa opts->oflags
are
.Dv LOWDOWN_HTML_OWASP ,
.Dv LOWDOWN_HTML_NUM_ENT ,
.Dv LOWDOWN_HTML_HEAD_IDS ,
.Dv LOWDOWN_HTML_HARD_WRAP ,
.Dv LOWDOWN_HTML_SKIP_HTML ,
.Dv LOWDOWN_HTML_ESCAPE ,
.Dv LOWDOWN_HTML_CALLOUT_MDN ,
.Dv LOWDOWN_HTML_CALLOUT_GFM ,
and
.Dv LOWDOWN_STANDALONE .
.Sh RETURN VALUES
Returns a pointer to the renderer or
.Dv NULL
on memory failure.
The returned pointer must be freed with
.Xr lowdown_html_free 3 .
.Sh EXAMPLES
The following parses
.Va b
of length
.Va bsz
and outputs in HTML format.
.Bd -literal -offset indent
struct lowdown_buf *out;
struct lowdown_doc *doc;
struct lowdown_node *n;
void *rndr;

if ((doc = lowdown_doc_new(NULL)) == NULL)
	err(1, NULL);
if ((n = lowdown_doc_parse(doc, NULL, b, bsz, NULL)) == NULL)
	err(1, NULL);
if ((out = lowdown_buf_new(256)) == NULL)
	err(1, NULL);
if ((rndr = lowdown_html_new(NULL)) == NULL)
	err(1, NULL);
if (!lowdown_html_rndr(out, rndr, n))
	err(1, NULL);

fwrite(out->data, 1, out->size, stdout);

lowdown_html_free(rndr);
lowdown_buf_free(out);
lowdown_node_free(n);
lowdown_doc_free(doc);
.Ed
.Sh SEE ALSO
.Xr lowdown 3 ,
.Xr lowdown_html_free 3 ,
.Xr lowdown_html_rndr 3
.Sh STANDARDS
The referenced HTML5 standard is
.Lk https://www.w3.org/TR/html52 HTML5.2 .
Output is compatible with prior HTML5 standards.