libelektra/src/plugins/null/null.c at master · darddan/libelektra · GitHub

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/**
 * @file
 *
 * @brief
 *
 * @copyright BSD License (see LICENSE.md or https://www.libelektra.org)
 */

#include "null.h"

#ifndef HAVE_KDBCONFIG
#include "kdbconfig.h"
#endif

#include <kdbhelper.h>

#include <stdlib.h>
#include <string.h>

int elektraNullGet (Plugin * handle ELEKTRA_UNUSED, KeySet * returned, Key * parentKey)
{
	if (!strcmp (keyName (parentKey), "system/elektra/modules/null"))
	{
		KeySet * moduleConfig =
			ksNew (30, keyNew ("system/elektra/modules/null", KEY_VALUE, "null plugin waits for your orders", KEY_END),
			       keyNew ("system/elektra/modules/null/exports", KEY_END),
			       keyNew ("system/elektra/modules/null/exports/get", KEY_FUNC, elektraNullGet, KEY_END),
			       keyNew ("system/elektra/modules/null/exports/set", KEY_FUNC, elektraNullSet, KEY_END),
#include "readme_null.c"
			       keyNew ("system/elektra/modules/null/infos/version", KEY_VALUE, PLUGINVERSION, KEY_END), KS_END);
		ksAppend (returned, moduleConfig);
		ksDel (moduleConfig);

		return 1;
	}
	/* get all keys */

	Key * k;
	ksRewind (returned);
	while ((k = ksNext (returned)) != 0)
	{
		if (!strcmp (keyString (k), "@NULL"))
		{
			keySetBinary (k, 0, 0);
		}
		else if (!strcmp (keyString (k), "@EMPTY"))
		{
			keySetString (k, "");
		}
		else if (!strncmp (keyString (k), "@@", 2))
		{
			/* Drop the first of the @ */
			keySetString (k, keyString (k) + 1);
		}
	}

	return 1; /* success */
}

int elektraNullSet (Plugin * handle ELEKTRA_UNUSED, KeySet * returned, Key * parentKey ELEKTRA_UNUSED)
{
	/* set all keys */

	Key * k;
	ksRewind (returned);
	while ((k = ksNext (returned)) != 0)
	{
		if (keyValue (k) == 0)
		{
			keySetString (k, "@NULL");
		}
		else if (!strcmp (keyValue (k), ""))
		{
			keySetString (k, "@EMPTY");
		}
		else if (!strncmp (keyValue (k), "@", 1))
		{
			char * n = elektraMalloc (keyGetValueSize (k) + 1);
			strcpy (n, "@");
			strcat (n, keyValue (k));
			keySetString (k, n);
			elektraFree (n);
		}
	}

	return 1; /* success */
}

Plugin * ELEKTRA_PLUGIN_EXPORT
{
	// clang-format off
	return elektraPluginExport("null",
		ELEKTRA_PLUGIN_GET,	&elektraNullGet,
		ELEKTRA_PLUGIN_SET,	&elektraNullSet,
		ELEKTRA_PLUGIN_END);
}