<div dir="ltr">Yes, if I can interface with the tool directly it would be ideal.<div><br></div><div>How can I add jextract as an external dependency for this? The jextract build is not a full jdk, and I'm running on jdk-19.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Oct 4, 2022 at 12:19 PM Maurizio Cimadamore <<a href="mailto:maurizio.cimadamore@oracle.com" target="_blank">maurizio.cimadamore@oracle.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Hi Nir,<br>
</p>
<div>On 02/10/2022 22:31, Nir Lisker wrote:<br>
</div>
<blockquote type="cite">
<div>5. When analyzing the symbols of a header using the dump
option, I need to read the file that jextract creates from disk
and then delete it. Is there a way to read the jextract output
directly? Either through the output stream, or writing to a file
in memory? Dealing with disk I/O is cumbersome, comes with
permission restrictions, and might be slow if done for many
files in a batch.</div>
</blockquote>
<p>I think ultimately, working with files might be not ideal for
your use case.</p>
<p>There is a pseudo-stable API to parse jextract files, in the
JextractTool class (in the org.openjdk.jextract package, which
should be exported by the jextract module):</p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">`public
static Declaration.Scoped parse(List<Path> headers,
String... parserOptions) {`</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">We do not
make any promise (at this stage at least) on the stability of
the API. That said, it has not changed much (at all?) in the
last couple of years.</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">What you get
back is a "Declaration", which is used to model vars, structs,
unions, typedefs, functions<br>
</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Then,
attached to declarations, there are "Type"s, which are used...
well, to model types. Since some type can be structured (e.g. a
struct type), they can point back to their declaration (e.g.
Type.Declared).</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Jextract does
all it does by defining visitors on this basic declaration tree,
which is obtained by wrapping the results of parsing a C header
using the clang API (e.g. clang Cursors).<br>
</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">We did this
to "sanitize" the output of clang, as well as to make our
implementation more robust and less dependent from clang
internals.</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">One option
for you would be to invoke the parsing process this way, then
get the tree and look at the results (e.g. with a visitor),
which sounds better than parsing an option file.</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br>
Cheers<br>
Maurizio<br>
</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br>
</span></p>
<p><span style="color:rgb(29,28,29);font-family:Slack-Lato,Slack-Fractions,appleLogo,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:common-ligatures;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br>
</span></p>
</div>
</blockquote></div>