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66 wiersze
3.4 KiB
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<!-- received="Sun Apr 11 13:41:33 1999 PDT" -->
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<!-- sent="Sun, 11 Apr 1999 22:44:52 +0200" -->
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<!-- name="Petter Reinholdtsen" -->
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<!-- email="pere@hungry.com" -->
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<!-- subject="Re: May sane_init fail?" -->
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<!-- id="199904112044.WAA10685@lee.Cc.Uit.No" -->
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<!-- inreplyto="May sane_init fail?" -->
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<title>sane-devel: Re: May sane_init fail?</title>
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<h1>Re: May sane_init fail?</h1>
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<b>Petter Reinholdtsen</b> (<a href="mailto:pere@hungry.com"><i>pere@hungry.com</i></a>)<br>
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<i>Sun, 11 Apr 1999 22:44:52 +0200</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#194">[ date ]</a><a href="index.html#194">[ thread ]</a><a href="subject.html#194">[ subject ]</a><a href="author.html#194">[ author ]</a>
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<li> <b>Next message:</b> <a href="0195.html">David Mosberger-Tang: "Re: sane-pre1.01 problems with dc210"</a>
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<li> <b>Previous message:</b> <a href="0193.html">Ruggero Valetti: "Scanner list update"</a>
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<li> <b>Maybe in reply to:</b> <a href="0166.html">Petter Reinholdtsen: "May sane_init fail?"</a>
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<li> <b>Next in thread:</b> <a href="0197.html">David Mosberger-Tang: "Re: May sane_init fail?"</a>
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<li> <b>Reply:</b> <a href="0197.html">David Mosberger-Tang: "Re: May sane_init fail?"</a>
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</ul>
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[David Mosberger-Tang]<br>
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<i>> Hmmh, this may well be a typo. I'm quite sure our intention was</i><br>
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<i>> that a frontend does not have to check for the return value of</i><br>
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<i>> sane_init() (i.e., treat it as a void). Note that none of the</i><br>
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<i>> existing frontends check the return status of sane_init(). I think</i><br>
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<i>> we should correct this in v2 of the SANE protocol.</i><br>
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<p>
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The dll backend is checking for status != SANE_STATUS_GOOD before<br>
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accepting the backend. I'm not sure if any backends actually is using<br>
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this, but I beleave there should be a way for the backend to say<br>
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"don't use me", and that sane_init therefore should return<br>
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SANE_Status.<br>
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<p>
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I suggest SANE_STATUS_GOOD if all is OK, and SANE_STATUS_UNSUPPORTED<br>
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if the backend beleave itself to be useless. The last case will be<br>
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the case for the net backend on Windows if the WINSOCK.DLL is missing<br>
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or has the wrong version. It should be the same with SCSI drivers on<br>
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machines with no SCSI card.<br>
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<pre>
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--
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##> Petter Reinholdtsen <## | <a href="mailto:pere@td.org.uit.no">pere@td.org.uit.no</a>
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O- <SCRIPT Language="Javascript">window.close()</SCRIPT>
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<a href="http://www.hungry.com/~pere/">http://www.hungry.com/~pere/</a> | Go Mozilla, go! Go!
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<p>
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<pre>
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--
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</pre>
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0195.html">David Mosberger-Tang: "Re: sane-pre1.01 problems with dc210"</a>
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<li> <b>Previous message:</b> <a href="0193.html">Ruggero Valetti: "Scanner list update"</a>
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<li> <b>Maybe in reply to:</b> <a href="0166.html">Petter Reinholdtsen: "May sane_init fail?"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0197.html">David Mosberger-Tang: "Re: May sane_init fail?"</a>
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<li> <b>Reply:</b> <a href="0197.html">David Mosberger-Tang: "Re: May sane_init fail?"</a>
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<!-- reply="end" -->
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</ul>
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