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Changes to "Manual for lc_handle_type" between 2014-11-24 20:10:47 and 2014-11-24 20:11:51



























































































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<H2>NAME</H2>
lc_handle_type - Convert string representation of a value to its correct type
<P>
<A NAME="lbAC">&nbsp;</A>
<H2>SYNOPSIS</H2>
<B>#include &lt;<A HREF="artifact/7c61a9805e664fde7943807af8d5e164e7cebdb6">libconfig.h</A>&gt;</B>
<P>
<B>int lc_handle_type(lc_var_type_t </B><I>type</I><B>, const char *</B><I>value</I><B>, void *</B><I>data</I><B>);</B>
<P>
<A NAME="lbAD">&nbsp;</A>
<H2>DESCRIPTION</H2>
<B><A HREF="wiki/Manual for lc_handle_type">lc_handle_type</A></B>(3)
converts the string
<I>value</I>
to the correct type specified by the 
<I>type </I>
parameter.  The result is stored in the memory region passed as
<I>data</I>,
which should be of the correct type.  For possible values for
<I>type</I>
and the corresponding
<I>data</I>
type, see the
<B><A HREF="wiki/Manual for lc_register_var">lc_register_var</A></B>(3)
man page.
<P>
<A NAME="lbAE">&nbsp;</A>
<H2>RETURN VALUE</H2>
On success 0 is returned, otherwise -1 is returned.  The memory pointed to by
<I>data</I>
may be altered in either case.
<P>
<A NAME="lbAF">&nbsp;</A>
<H2>EXAMPLE</H2>
<PRE>
#include &lt;<A HREF="artifact/7c61a9805e664fde7943807af8d5e164e7cebdb6">libconfig.h</A>&gt;
#include &lt;<A HREF="file:/usr/include/stdlib.h">stdlib.h</A>&gt;
#include &lt;<A HREF="file:/usr/include/stdio.h">stdio.h</A>&gt;
int callback_size(const char *shortvar, const char *var,
                  const char *arguments, const char *value,
                  lc_flags_t flags, void *extra) {
        size_t size;
        int lc_ht_ret;
        if (value == NULL) {
                lc_seterrstr(&quot;You must specify an argument to \
                              Size.&quot;);
                return(LC_CBRET_ERROR);
        }
        lc_ht_ret = lc_handle_type(LC_VAR_SIZE_SIZE_T, value, &amp;size);
        if (lc_ht_ret != 0) {
                lc_seterrstr(&quot;Invalid size specified.&quot;);
                return(LC_CBRET_ERROR);
        }
        printf(&quot;Size: %lu\n&quot;, (unsigned long) size);
        return(LC_CBRET_OKAY);
}
int main(int argc, char **argv) {
        int lc_rc_ret, lc_p_ret;
        lc_rc_ret = lc_register_callback(&quot;Size&quot;, 0, LC_VAR_SIZE_SIZE_T,
                                         callback_size, NULL);
        if (lc_rc_ret != 0) {
                fprintf(stderr, &quot;Error registering callback.\n&quot;);
                return(EXIT_FAILURE);
        }
        lc_p_ret = lc_process(argc, argv, &quot;example&quot;, LC_CONF_APACHE,
                              NULL);
        lc_cleanup();
        if (lc_p_ret != 0) {
                fprintf(stderr, &quot;Error processing configuration: \
                        %s\n&quot;, lc_geterrstr());
                return(EXIT_FAILURE);
        }
        return(EXIT_SUCCESS);
}
</PRE>
<P>
<P>
<A NAME="lbAG">&nbsp;</A>
<H2>SEE ALSO</H2>
<B><A HREF="wiki/Manual">libconfig</A></B>(3),
<B><A HREF="wiki/Manual for lc_register_var">lc_register_var</A></B>(3),
<B><A HREF="wiki/Manual for lc_register_callback">lc_register_callback</A></B>(3),
<B><A HREF="wiki/Manual for lc_geterrno">lc_geterrno</A></B>(3),
<B><A HREF="wiki/Manual for lc_geterrstr">lc_geterrstr</A></B>(3),
<B><A HREF="wiki/Manual for lc_seterrstr">lc_seterrstr</A></B>(3),
<B><A HREF="wiki/Manual for lc_process">lc_process</A></B>(3),
<B><A HREF="wiki/Manual for lc_process_file">lc_process_file</A></B>(3),
<B><A HREF="wiki/Manual for lc_cleanup">lc_cleanup</A></B>(3)
<P>












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