1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<HEAD>
<TITLE>put_logfunc</TITLE>
<style TYPE="text/css"> BODY { font-family:verdana,arial,helvetica; margin:0; }
</style>
</HEAD>
<BODY>
<TABLE class="clsContainer" style="TABLE-LAYOUT: fixed" cellSpacing="0" cellPadding="15"
width="100%" border="0">
<TR>
<TD vAlign="top">
<h1>put_logfunc</h1>
<p>Sets a log routine.</p>
<p><b>void put_logfunc(lprec </b>*<i>lp</i><b>, lphandlestr_func </b><i>newlog</i><b>, void </b>*<i>loghandle</i><b>);</b></p>
<p class="label"><b>Return Value</b></p>
<p><b>put_logfunc</b> has no return value.<br>
</p>
<p class="label"><b>Parameters</b></p>
<p class="dt"><i>lp</i></p>
<p class="indent">Pointer to previously created lp model. See return value of <A href="make_lp.htm">
make_lp</A>, <A HREF="copy_lp.htm">copy_lp</A>, <A href="read_lp.htm">read_lp,
read_LP</A>, <A href="read_mps.htm">read_mps, read_freemps, read_MPS, read_freeMPS</A>, <A HREF="read_XLI.htm">read_XLI</A></p>
<p class="dt"><i>newlog</i></p>
<p class="indent">The log routine.<br>
<br>
typedef void (__WINAPI lphandlestr_func)(lprec *lp, void *userhandle, char *buf);
<br>
Note the __WINAPI attribute. This is important under Windows. It ensures __stdcall calling
convention which is required.
</p>
<p class="dt"><i>loghandle</i></p>
<p class="indent">A parameter that will be provided to the log routine.</p>
<p class="label"><b>Remarks</b></p>
<p>The <b>put_logfunc</b> function sets a log routine.<br>
When set, the log routine is called when lp_solve has someting to report.
The return value of this routine should be 0. The log
routine can be cleared by specifying NULL as log routine.<br>
This function is called at the same time as something is written to file set via
<A HREF="set_output.htm">set_outputstream, set_outputfile</A>.
</p>
<p class="label"><b>Example</b></p>
<pre><code>#include <stdio.h>
#include <stdlib.h>
#include "lp_lib.h"
void __WINAPI logfunction(lprec *lp, void *userhandle, char *buf)
{
/* do something with buf (the message) */
}
int main(void)
{
lprec *lp;
/* Create a new LP model */
lp = make_lp(0, 0);
if(lp == NULL) {
fprintf(stderr, "Unable to create new LP model\n");
return(1);
}
put_logfunc(lp, logfunction, NULL);
set_verbose(lp, FULL);
del_column(lp, 1); /* Will generate an error because column 1 does not exist */
/* Note that del_column returns FALSE (0) to indicate an error */
delete_lp(lp);
return(0);
}
</code></pre>
<p>
<A HREF="lp_solveAPIreference.htm">lp_solve API reference</A></p>
<p>
<b>See Also</b> <A HREF="make_lp.htm">make_lp</A>, <A HREF="copy_lp.htm">copy_lp</A>,
<A href="read_lp.htm">read_lp, read_LP</A>, <A HREF="read_mps.htm">read_mps,
read_freemps, read_MPS, read_freeMPS</A>, <A HREF="read_XLI.htm">read_XLI</A>, <A HREF="put_abortfunc.htm">put_abortfunc</A></p>
</TD>
</TR>
</TABLE>
</BODY>
</html>
|
