tor-android/external/badvpn_dns/ncd/modules/assert.c

106 lines
3.7 KiB
C

/**
* @file assert.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:
* assert(string cond)
* assert_false(string cond)
*
* Description:
* If 'cond' is equal to the string "true" (assert) or "false" (assert_false),
* does nothing. Otherwise, logs an error and initiates interpreter termination
* with exit code 1, i.e. it is equivalent to calling exit("1").
* Note that "assert_false(cond);" is not completely equivalent to
* "not(cond) a; assert(a);", in case 'cond' is something other than "true"
* or "false".
*/
#include <ncd/NCDModule.h>
#include <ncd/static_strings.h>
#include <generated/blog_channel_ncd_assert.h>
#define ModuleLog(i, ...) NCDModuleInst_Backend_Log((i), BLOG_CURRENT_CHANNEL, __VA_ARGS__)
static void func_new_common (NCDModuleInst *i, const struct NCDModuleInst_new_params *params, int is_false)
{
// check arguments
NCDValRef cond_arg;
if (!NCDVal_ListRead(params->args, 1, &cond_arg)) {
ModuleLog(i, BLOG_ERROR, "wrong arity");
goto fail0;
}
if (!NCDVal_IsString(cond_arg)) {
ModuleLog(i, BLOG_ERROR, "wrong type");
goto fail0;
}
// signal up
NCDModuleInst_Backend_Up(i);
// if failed, initiate exit (before up!)
if ((!is_false && !NCDVal_StringEqualsId(cond_arg, NCD_STRING_TRUE, i->params->iparams->string_index)) ||
(is_false && !NCDVal_StringEqualsId(cond_arg, NCD_STRING_FALSE, i->params->iparams->string_index))
) {
ModuleLog(i, BLOG_ERROR, "assertion failed");
NCDModuleInst_Backend_InterpExit(i, 1);
}
return;
fail0:
NCDModuleInst_Backend_DeadError(i);
}
static void func_new (void *unused, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
func_new_common(i, params, 0);
}
static void func_new_false (void *unused, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
func_new_common(i, params, 1);
}
static struct NCDModule modules[] = {
{
.type = "assert",
.func_new2 = func_new
}, {
.type = "assert_false",
.func_new2 = func_new_false
}, {
.type = NULL
}
};
const struct NCDModuleGroup ncdmodule_assert = {
.modules = modules
};