102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/**
|
|
* @file if.c
|
|
* @author Ambroz Bizjak <ambrop7@gmail.com>
|
|
*
|
|
* @section LICENSE
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the author nor the
|
|
* names of its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* @section DESCRIPTION
|
|
*
|
|
* Conditional module.
|
|
*
|
|
* Synopsis: if(string cond)
|
|
* Description: on initialization, transitions to UP state if cond equals "true", else
|
|
* remains in the DOWN state indefinitely.
|
|
*
|
|
* Synopsis: ifnot(string cond)
|
|
* Description: on initialization, transitions to UP state if cond does not equal "true", else
|
|
* remains in the DOWN state indefinitely.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <ncd/module_common.h>
|
|
|
|
#include <generated/blog_channel_ncd_if.h>
|
|
|
|
static void new_templ (NCDModuleInst *i, const struct NCDModuleInst_new_params *params, int is_not)
|
|
{
|
|
// check arguments
|
|
NCDValRef arg;
|
|
if (!NCDVal_ListRead(params->args, 1, &arg)) {
|
|
ModuleLog(i, BLOG_ERROR, "wrong arity");
|
|
goto fail0;
|
|
}
|
|
int arg_val;
|
|
if (!ncd_read_boolean(arg, &arg_val)) {
|
|
ModuleLog(i, BLOG_ERROR, "bad argument");
|
|
goto fail0;
|
|
}
|
|
|
|
// compute logical value of argument
|
|
int c = arg_val;
|
|
|
|
// signal up if needed
|
|
if ((is_not && !c) || (!is_not && c)) {
|
|
NCDModuleInst_Backend_Up(i);
|
|
}
|
|
|
|
return;
|
|
|
|
fail0:
|
|
NCDModuleInst_Backend_DeadError(i);
|
|
}
|
|
|
|
static void func_new (void *unused, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
|
|
{
|
|
new_templ(i, params, 0);
|
|
}
|
|
|
|
static void func_new_not (void *unused, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
|
|
{
|
|
new_templ(i, params, 1);
|
|
}
|
|
|
|
static struct NCDModule modules[] = {
|
|
{
|
|
.type = "if",
|
|
.func_new2 = func_new
|
|
}, {
|
|
.type = "ifnot",
|
|
.func_new2 = func_new_not
|
|
}, {
|
|
.type = NULL
|
|
}
|
|
};
|
|
|
|
const struct NCDModuleGroup ncdmodule_if = {
|
|
.modules = modules
|
|
};
|