<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<font face="Arial">Hi,<br>
<br>
I have N figures. I would like to re-export only those that were
modified in the meanwhile.<br>
Indeed, exporting with xs2### is rather time-consuming, in such a
way that i am looking for a short-circuit.<br>
<br>
The way that i imagined is the following, for a figure of handle f
:<br>
1) f is saved in file1.sod. This is quite faster than exporting.<br>
2) later, f is re-saved in file2.sod<br>
3) we compute the MD5 checksums of the contents of file1.sod and
file2.sod<br>
4) we compare both checksums. If they are different, we re-export
f.<br>
<br>
Unfortunately, it looks that save(..) likely saves also an
internal timestamp, or something varying external to the main
saved content.<br>
This ruins the idea, and i do not see any reflief plan. Here is a
proof:</font><br>
<pre style="font-family:Monospaced;font-style:normal;font-size:13.0;"><span style="color:rgb(174,92,176);text-decoration:underline;">clf</span>
<span style="color:rgb(50,185,185);">plot2d</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(74,85,219);">)</span>
<span style="color:rgb(0,0,0);">f</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(174,92,176);text-decoration:underline;">gcf</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(50,185,185);">save</span> <span style="color:rgb(188,143,143);">test.sod</span> <span style="color:rgb(188,143,143);">f</span>
<span style="color:rgb(50,185,185);">getmd5</span> <span style="color:rgb(188,143,143);">test.sod</span>
<span style="color:rgb(50,185,185);">sleep</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">5000</span><span style="color:rgb(74,85,219);">)</span>
<span style="color:rgb(50,185,185);">save</span> <span style="color:rgb(188,143,143);">test.sod</span> <span style="color:rgb(188,143,143);">f</span>
<span style="color:rgb(50,185,185);">getmd5</span> <span style="color:rgb(188,143,143);">test.sod</span>
<span style="color:rgb(188,143,143);"></span></pre>
<font face="Arial">Yielding:<br>
<br>
-->clf<br>
-->plot2d()<br>
-->f = gcf();<br>
-->save test.sod f<br>
-->getmd5 test.sod<br>
ans =<br>
e015481486eb9708a4fe1d3df1cbbbb9 <br>
-->sleep(5000)<br>
-->save test.sod f<br>
-->getmd5 test.sod<br>
ans =<br>
3c6319b5d3a2299caaacc2f95c3efb32 </font><br>
<font face="Arial"><br>
Other tests show that<br>
1) renaming the file does not change its checksum returned by
getmd5()<br>
2) modifying the OS timestamp of the file (any of creation, last
access, last write) does not change its checksum.<br>
<br>
Hence, it really looks that an internal timestamp is recorded with
the proper data.<br>
So, my questions are :<br>
1) do -- you developers -- confirm this save()'s behavior? I did
you go the the source code.<br>
2) Why doing that? Is is on purpose, or is it a bug?<br>
3) Is there a way to avoid it? <br>
a) There is presently no usage option to avoid it<br>
b) On option, recording only the date with a fixed
conventionnal hour such that 00:00:00.000 would be ok for me.<br>
10s of export is <<< 24h ;)<br>
4) Would you have any idea to do what i expect with figures,
without using their saved handles?<br>
I posted a wish and proposal
<a class="moz-txt-link-freetext" href="http://bugzilla.scilab.org/show_bug.cgi?id=11658">http://bugzilla.scilab.org/show_bug.cgi?id=11658</a> 3 years ago, in
order to <br>
open the possibillity to save copies of handles (in
structures) and then becomes able to compare them.<br>
But the thread does not breathe...<br>
<br>
Reading you soon<br>
<br>
Samuel<br>
<br>
</font>
</body>
</html>