badvpn/ncd/modules/to_string.c
Ambroz Bizjak 98ed187623 ncd: Remove ComposedString type along with the buffer module.
It was a fancy feature, but with questionable utility and with a general maintenance burden.
2014-11-18 22:49:14 +01:00

114 lines
3.2 KiB
C

/**
* @file to_string.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
*
* Synopsis:
* to_string(value)
* Variables:
* string (empty) - value, converted to string
*/
#include <stdlib.h>
#include <string.h>
#include <ncd/NCDValGenerator.h>
#include <ncd/module_common.h>
#include <generated/blog_channel_ncd_to_string.h>
struct instance {
NCDModuleInst *i;
char *str;
};
static void func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
struct instance *o = vo;
o->i = i;
// read arguments
NCDValRef value_arg;
if (!NCDVal_ListRead(params->args, 1, &value_arg)) {
ModuleLog(i, BLOG_ERROR, "wrong arity");
goto fail0;
}
// convert to string
if (!(o->str = NCDValGenerator_Generate(value_arg))) {
ModuleLog(i, BLOG_ERROR, "NCDValGenerator_Generate failed");
goto fail0;
}
// signal up
NCDModuleInst_Backend_Up(i);
return;
fail0:
NCDModuleInst_Backend_DeadError(i);
}
static void func_die (void *vo)
{
struct instance *o = vo;
// free string
free(o->str);
NCDModuleInst_Backend_Dead(o->i);
}
static int func_getvar2 (void *vo, NCD_string_id_t name, NCDValMem *mem, NCDValRef *out)
{
struct instance *o = vo;
if (name == NCD_STRING_EMPTY) {
*out = NCDVal_NewString(mem, o->str);
return 1;
}
return 0;
}
static struct NCDModule modules[] = {
{
.type = "to_string",
.func_new2 = func_new,
.func_die = func_die,
.func_getvar2 = func_getvar2,
.alloc_size = sizeof(struct instance)
}, {
.type = NULL
}
};
const struct NCDModuleGroup ncdmodule_to_string = {
.modules = modules
};