mirror of
https://github.com/netfun2000/lcd4linux.git
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a9d650fb4d
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@727 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
141 lines
3.1 KiB
C
141 lines
3.1 KiB
C
/* $Id$
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* $URL$
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*
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* plugin for config file access
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*
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* Copyright (C) 2003, 2004 Michael Reinelt <reinelt@eunet.at>
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* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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* exported functions:
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*
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* int plugin_init_cfg (void)
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* adds cfg() function for config access
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* initializes variables from the config file
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*
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "debug.h"
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#include "evaluator.h"
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#include "plugin.h"
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#include "cfg.h"
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif
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static void load_variables(void)
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{
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char *section = "Variables";
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char *list, *l, *p;
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char *expression;
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void *tree;
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RESULT result = { 0, 0, 0, NULL };
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list = cfg_list(section);
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l = list;
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while (l != NULL) {
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while (*l == '|')
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l++;
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if ((p = strchr(l, '|')) != NULL)
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*p = '\0';
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if (strchr(l, '.') != NULL || strchr(l, ':') != 0) {
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error("ignoring variable '%s' from %s: structures not allowed", l, cfg_source());
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} else {
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expression = cfg_get_raw(section, l, "");
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if (expression != NULL && *expression != '\0') {
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tree = NULL;
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if (Compile(expression, &tree) == 0 && Eval(tree, &result) == 0) {
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SetVariable(l, &result);
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debug("Variable %s = '%s' (%g)", l, R2S(&result), R2N(&result));
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DelResult(&result);
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} else {
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error("error evaluating variable '%s' from %s", list, cfg_source());
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}
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DelTree(tree);
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}
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}
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l = p ? p + 1 : NULL;
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}
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free(list);
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}
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static void my_cfg(RESULT * result, const int argc, RESULT * argv[])
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{
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int i, len;
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char *value;
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char *buffer;
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/* calculate key length */
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len = 0;
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for (i = 0; i < argc; i++) {
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len += strlen(R2S(argv[i])) + 1;
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}
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/* allocate key buffer */
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buffer = malloc(len + 1);
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/* prepare key buffer */
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*buffer = '\0';
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for (i = 0; i < argc; i++) {
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strcat(buffer, ".");
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strcat(buffer, R2S(argv[i]));
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}
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/* buffer starts with '.', so cut off first char */
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value = cfg_get("", buffer + 1, "");
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/* store result */
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SetResult(&result, R_STRING, value);
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/* free buffer again */
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free(buffer);
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free(value);
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}
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int plugin_init_cfg(void)
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{
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/* load "Variables" section from cfg */
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load_variables();
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/* register plugin */
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AddFunction("cfg", -1, my_cfg);
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return 0;
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}
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void plugin_exit_cfg(void)
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{
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/* empty */
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}
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