/
template_tree_node.cc
2383 lines (2063 loc) · 60.2 KB
/
template_tree_node.cc
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// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
// Copyright (c) 2001-2011 XORP, Inc and Others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, Version 2, June
// 1991 as published by the Free Software Foundation. Redistribution
// and/or modification of this program under the terms of any other
// version of the GNU General Public License is not permitted.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For more details,
// see the GNU General Public License, Version 2, a copy of which can be
// found in the XORP LICENSE.gpl file.
//
// XORP Inc, 2953 Bunker Hill Lane, Suite 204, Santa Clara, CA 95054, USA;
// http://xorp.net
#include "rtrmgr_module.h"
#include "libxorp/xorp.h"
#include "libxorp/xlog.h"
#include "libxorp/debug.h"
#include "libxorp/utils.hh"
#ifdef HAVE_GLOB_H
#include <glob.h>
#elif defined(HOST_OS_WINDOWS)
#include "glob_win32.h"
#endif
#include "command_tree.hh"
#include "conf_tree.hh"
#include "module_command.hh"
#include "template_commands.hh"
#include "template_tree.hh"
#include "template_tree_node.hh"
#include "util.hh"
TemplateTreeNode::TemplateTreeNode(TemplateTree& template_tree,
TemplateTreeNode* parent,
const string& path,
const string& varname)
: _parent(parent),
_template_tree(template_tree),
_module_name(""),
_default_target_name(""),
_segname(path),
_varname(varname),
_has_default(false),
_is_tag(false),
_order(ORDER_UNSORTED),
_verbose(template_tree.verbose()),
_is_deprecated(false),
_is_user_hidden(false),
_is_mandatory(false),
_is_read_only(false),
_is_permanent(false)
{
if (_parent != NULL) {
_parent->add_child(this);
_module_name = _parent->module_name();
_default_target_name = _parent->default_target_name();
_child_number = _parent->children().size();
} else {
_child_number = 0;
}
}
TemplateTreeNode::~TemplateTreeNode()
{
while (! _children.empty()) {
delete _children.front();
_children.pop_front();
}
map<string, BaseCommand *>::iterator iter1, iter2;
iter1 = _cmd_map.begin();
while (iter1 != _cmd_map.end()) {
iter2 = iter1;
++iter1;
delete iter2->second;
_cmd_map.erase(iter2);
}
}
bool
TemplateTreeNode::expand_template_tree(string& error_msg)
{
map<string, BaseCommand*>::iterator cmd_iter;
//
// Expand all %allow, %allow-operator and %allow-range filters.
// XXX: currently the %allow-operator expanding is no-op.
//
cmd_iter = _cmd_map.find("%allow");
if (cmd_iter != _cmd_map.end()) {
BaseCommand* command = cmd_iter->second;
AllowOptionsCommand* allow_options_command;
allow_options_command = dynamic_cast<AllowOptionsCommand*>(command);
XLOG_ASSERT(allow_options_command != NULL);
if (allow_options_command->expand_actions(error_msg) != true)
return (false);
}
cmd_iter = _cmd_map.find("%allow-operator");
if (cmd_iter != _cmd_map.end()) {
BaseCommand* command = cmd_iter->second;
AllowOperatorsCommand* allow_operators_command;
allow_operators_command = dynamic_cast<AllowOperatorsCommand*>(command);
XLOG_ASSERT(allow_operators_command != NULL);
if (allow_operators_command->expand_actions(error_msg) != true)
return (false);
}
cmd_iter = _cmd_map.find("%allow-range");
if (cmd_iter != _cmd_map.end()) {
BaseCommand* command = cmd_iter->second;
AllowRangeCommand* allow_range_command;
allow_range_command = dynamic_cast<AllowRangeCommand*>(command);
XLOG_ASSERT(allow_range_command != NULL);
if (allow_range_command->expand_actions(error_msg) != true)
return (false);
}
//
// Mark all referred mandatory variables
//
list<string>::const_iterator string_iter;
for (string_iter = mandatory_config_nodes().begin();
string_iter != mandatory_config_nodes().end();
++string_iter) {
const string& mandatory_config_node = *string_iter;
TemplateTreeNode* ttn;
ttn = find_varname_node(mandatory_config_node);
if (ttn == NULL) {
error_msg = c_format("Invalid template mandatory variable %s: "
"not found",
mandatory_config_node.c_str());
return (false);
}
bool is_multi_value = false;
TemplateTreeNode* ttn_check_multi = ttn;
do {
//
// Check if there is a multi-value node between the referred
// template node and this node (or the root of the template tree).
//
if (ttn_check_multi->is_tag()) {
is_multi_value = true;
break;
}
ttn_check_multi = ttn_check_multi->parent();
if (ttn_check_multi == this)
break;
if (ttn_check_multi == NULL)
break;
} while (true);
if (is_multi_value) {
error_msg = c_format("Invalid template mandatory variable %s: "
"cannot specify a multi-value node as "
"mandatory",
mandatory_config_node.c_str());
return (false);
}
ttn->set_mandatory(true);
}
//
// Recursively expand all children nodes
//
list<TemplateTreeNode*>::iterator iter2;
for (iter2 = _children.begin(); iter2 != _children.end(); ++iter2) {
TemplateTreeNode* ttn = *iter2;
if (ttn->expand_template_tree(error_msg) != true)
return (false);
}
return (true);
}
bool
TemplateTreeNode::check_template_tree(string& error_msg) const
{
const BaseCommand *base_cmd = NULL;
map<string, BaseCommand*>::const_iterator cmd_iter;
//
// Check all refered variables for this node
//
for (cmd_iter = _cmd_map.begin(); cmd_iter != _cmd_map.end(); ++cmd_iter) {
const BaseCommand* command = cmd_iter->second;
if (! command->check_referred_variables(error_msg))
return false;
}
//
// Check all referred mandatory variables
//
list<string>::const_iterator string_iter;
for (string_iter = mandatory_config_nodes().begin();
string_iter != mandatory_config_nodes().end();
++string_iter) {
const string& mandatory_config_node = *string_iter;
const TemplateTreeNode* ttn;
ttn = find_const_varname_node(mandatory_config_node);
if (ttn == NULL) {
error_msg = c_format("Invalid template mandatory variable %s: "
"not found",
mandatory_config_node.c_str());
return false;
}
bool is_multi_value = false;
do {
//
// Check if there is a multi-value node between the referred
// template node and this node (or the root of the template tree).
//
if (ttn->is_tag()) {
is_multi_value = true;
break;
}
ttn = ttn->parent();
if (ttn == this)
break;
if (ttn == NULL)
break;
} while (true);
if (is_multi_value) {
error_msg = c_format("Invalid template mandatory variable %s: "
"cannot specify a multi-value node as "
"mandatory",
mandatory_config_node.c_str());
return false;
}
}
//
// Check specific commands for this node
//
// XXX: only leaf nodes should have %set command
base_cmd = const_command("%set");
if (base_cmd != NULL) {
if (! is_leaf_value()) {
error_msg = c_format("Found %%set command in node \"%s\" that "
"doesn't expect value",
path().c_str());
return false;
}
}
//
// Recursively check all children nodes
//
list<TemplateTreeNode*>::const_iterator iter2;
for (iter2 = _children.begin(); iter2 != _children.end(); ++iter2) {
const TemplateTreeNode* ttn = *iter2;
if (ttn->check_template_tree(error_msg) != true)
return false;
}
return true;
}
void
TemplateTreeNode::add_child(TemplateTreeNode* child)
{
_children.push_back(child);
}
void
TemplateTreeNode::add_cmd(const string& cmd) throw (ParseError)
{
string error_msg;
BaseCommand* command;
if (cmd == "%modinfo") {
// only the MasterTemplateTree cares about this
} else if (cmd == "%allow") {
// If the command already exists, no need to create it again.
// The command action will simply be added to the existing command.
if (_cmd_map.find(cmd) == _cmd_map.end()) {
command = new AllowOptionsCommand(*this, cmd);
_cmd_map[cmd] = command;
}
} else if (cmd == "%allow-range") {
// If the command already exists, no need to create it again.
// The command action will simply be added to the existing command.
if (_cmd_map.find(cmd) == _cmd_map.end()) {
command = new AllowRangeCommand(*this, cmd);
_cmd_map[cmd] = command;
}
} else if (cmd == "%allow-operator") {
debug_msg("%%allow-operator\n");
// If the command already exists, no need to create it again.
// The command action will simply be added to the existing command.
if (_cmd_map.find(cmd) == _cmd_map.end()) {
debug_msg("creating new AllowOperatorsCommand\n");
command = new AllowOperatorsCommand(*this, cmd);
_cmd_map[cmd] = command;
}
} else if (cmd == "%help") {
// Nothing to do - the work is done by add_action
} else if (cmd == "%deprecated") {
// Nothing to do - the work is done by add_action
} else if (cmd == "%user-hidden") {
// Nothing to do - the work is done by add_action
} else if (cmd == "%read-only") {
// XXX: only leaf nodes should have %read-only command
if (! is_leaf_value()) {
error_msg = c_format("Invalid command \"%s\".\n", cmd.c_str());
error_msg += "This command only applies to leaf nodes that have ";
error_msg += "values.\n";
xorp_throw(ParseError, error_msg);
}
_is_read_only = true;
_is_permanent = true; // XXX: read-only also implies permanent node
} else if (cmd == "%permanent") {
_is_permanent = true;
} else if (cmd == "%order") {
// Nothing to do - the work is done by add_action
} else if ((cmd == "%create")
|| (cmd == "%activate")
|| (cmd == "%update")
|| (cmd == "%list")
|| (cmd == "%delete")
|| (cmd == "%set")
|| (cmd == "%unset")
|| (cmd == "%get")
|| (cmd == "%default")) {
//
// Check if we are allowed to add this command
//
if (cmd == "%set") {
// XXX: only leaf nodes should have %set command
if (! is_leaf_value()) {
error_msg = c_format("Invalid command \"%s\".\n", cmd.c_str());
error_msg += "This command only applies to leaf nodes that ";
error_msg += "have values and only if the value is allowed ";
error_msg += "to be changed.\n";
xorp_throw(ParseError, error_msg);
}
}
//
// XXX: We just create a placeholder here - if we were a master
// template tree node we'd create a real command.
//
if (_cmd_map.find(cmd) == _cmd_map.end()) {
command = new DummyBaseCommand(*this, cmd);
_cmd_map[cmd] = command;
}
} else if (cmd == "%mandatory") {
// Nothing to do
} else {
error_msg = c_format("Invalid command \"%s\".\n", cmd.c_str());
error_msg += "Valid commands are %create, %delete, %set, %unset, ";
error_msg += "%get, %default, %modinfo, %activate, %update, %allow, ";
error_msg += "%allow-range, %mandatory, %deprecated, %user-hidden, ";
error_msg += "%read-only, %permanent, %order\n";
xorp_throw(ParseError, error_msg);
}
}
set<string>
TemplateTreeNode::commands() const
{
set<string> cmds;
map<string, BaseCommand *>::const_iterator iter;
for (iter = _cmd_map.begin(); iter != _cmd_map.end(); ++iter) {
cmds.insert(iter->first);
}
return cmds;
}
void
TemplateTreeNode::add_action(const string& cmd,
const list<string>& action_list)
throw (ParseError)
{
BaseCommand* command;
map<string, BaseCommand*>::iterator iter;
string error_msg;
if (cmd == "%modinfo") {
// only the Master tree cares about this
} else if (cmd == "%allow") {
iter = _cmd_map.find("%allow");
XLOG_ASSERT(iter != _cmd_map.end());
command = iter->second;
AllowCommand* allow_command = dynamic_cast<AllowCommand*>(command);
XLOG_ASSERT(allow_command != NULL);
allow_command->add_action(action_list);
} else if (cmd == "%allow-range") {
iter = _cmd_map.find("%allow-range");
XLOG_ASSERT(iter != _cmd_map.end());
command = iter->second;
AllowCommand* allow_command = dynamic_cast<AllowCommand*>(command);
XLOG_ASSERT(allow_command != NULL);
allow_command->add_action(action_list);
} else if (cmd == "%allow-operator") {
iter = _cmd_map.find("%allow-operator");
XLOG_ASSERT(iter != _cmd_map.end());
command = iter->second;
AllowCommand* allow_command = dynamic_cast<AllowCommand*>(command);
XLOG_ASSERT(allow_command != NULL);
allow_command->add_action(action_list);
} else if (cmd == "%help") {
if (action_list.size() == 2) {
list<string>::const_iterator li = action_list.begin();
li++;
// Trim off quotes if present
string help = unquote(*li);
if (action_list.front() == "short") {
_help = help;
} else if (action_list.front() == "long") {
_help_long = help;
} else {
error_msg = c_format("Invalid %%help descriptor %s: "
"\"short\" or \"long\" expectted",
action_list.front().c_str());
xorp_throw(ParseError, error_msg);
}
} else {
error_msg = c_format("Invalid number of %%help arguments: "
"%u (expected 2)",
XORP_UINT_CAST(action_list.size()));
xorp_throw(ParseError, error_msg);
}
} else if (cmd == "%deprecated") {
if (action_list.size() == 1) {
list<string>::const_iterator li = action_list.begin();
// Trim off quotes if present
string reason = unquote(*li);
_is_deprecated = true;
_deprecated_reason = reason;
if ((_parent != NULL) && (_parent->is_tag())) {
_parent->set_deprecated(true);
_parent->set_deprecated_reason(reason);
}
} else {
error_msg = c_format("Invalid number of %%deprecated arguments: "
"%u (expected 1)",
XORP_UINT_CAST(action_list.size()));
xorp_throw(ParseError, error_msg);
}
} else if (cmd == "%user-hidden") {
if (action_list.size() == 1) {
list<string>::const_iterator li = action_list.begin();
// Trim off quotes if present
string reason = unquote(*li);
_is_user_hidden = true;
_user_hidden_reason = reason;
if ((_parent != NULL) && (_parent->is_tag())) {
_parent->set_user_hidden(true);
_parent->set_user_hidden_reason(reason);
}
} else {
error_msg = c_format("Invalid number of %%user-hidden arguments: "
"%u (expected 1)",
XORP_UINT_CAST(action_list.size()));
xorp_throw(ParseError, error_msg);
}
} else if (cmd == "%read-only") {
if (action_list.size() == 1) {
list<string>::const_iterator li = action_list.begin();
// Trim off quotes if present
string reason = unquote(*li);
_is_read_only = true;
_read_only_reason = reason;
_is_permanent = true; // XXX: read-only also implies permanent node
} else {
error_msg = c_format("Invalid number of %%user-hidden arguments: "
"%u (expected 1)",
XORP_UINT_CAST(action_list.size()));
xorp_throw(ParseError, error_msg);
}
} else if (cmd == "%permanent") {
if (action_list.size() == 1) {
list<string>::const_iterator li = action_list.begin();
// Trim off quotes if present
string reason = unquote(*li);
_is_permanent = true;
_permanent_reason = reason;
} else {
error_msg = c_format("Invalid number of %%permanent arguments: "
"%u (expected 1)",
XORP_UINT_CAST(action_list.size()));
xorp_throw(ParseError, error_msg);
}
} else if (cmd == "%order") {
if (action_list.size() == 1) {
list<string>::const_iterator li = action_list.begin();
TTSortOrder order = ORDER_UNSORTED;
if (*li == "unsorted") {
order = ORDER_UNSORTED;
} else if (*li == "sorted-numeric") {
order = ORDER_SORTED_NUMERIC;
} else if (*li == "sorted-alphabetic") {
order = ORDER_SORTED_ALPHABETIC;
} else {
error_msg = c_format("Bad %%order specification in template "
"file ignored - should be unsorted, "
"sorted-numeric, or sorted-alphabetic");
xorp_throw(ParseError, error_msg);
}
set_order(order);
if ((_parent != NULL) && (_parent->is_tag())) {
_parent->set_order(order);
}
} else {
error_msg = c_format("Invalid number of %%order arguments: "
"%u (expected 1)",
XORP_UINT_CAST(action_list.size()));
xorp_throw(ParseError, error_msg);
}
} else if (cmd == "%mandatory") {
// Add all new mandatory variables
list<string>::const_iterator li;
for (li = action_list.begin(); li != action_list.end(); ++li) {
const string& varname = *li;
if (find(_mandatory_config_nodes.begin(),
_mandatory_config_nodes.end(),
varname)
== _mandatory_config_nodes.end()) {
_mandatory_config_nodes.push_back(varname);
}
}
} else {
// the master tree will deal with these
}
}
map<string, string>
TemplateTreeNode::create_variable_map(const list<string>& segments) const
{
map<string,string> varmap;
const TemplateTreeNode* ttn = this;
list<string>::const_reverse_iterator iter;
for (iter = segments.rbegin(); iter != segments.rend(); ++iter) {
if (ttn->name_is_variable())
varmap[ttn->segname()] = *iter;
ttn = ttn->parent();
}
return varmap;
}
string
TemplateTreeNode::path() const
{
string path;
if (_parent != NULL) {
string parent_path = _parent->path();
if (parent_path == "")
path = _segname;
else
path = parent_path + " " + _segname;
} else {
path = "";
}
return path;
}
bool
TemplateTreeNode::is_module_root_node() const
{
string my_module_name, parent_module_name;
my_module_name = module_name();
if (my_module_name.empty())
return (false); // XXX: this node doesn't belong to any module
if (parent() != NULL)
parent_module_name = parent()->module_name();
return (my_module_name != parent_module_name);
}
bool
TemplateTreeNode::is_leaf_value() const
{
if ((type() != NODE_VOID) && (_parent != NULL) && (!_parent->is_tag()))
return true;
return false;
}
list<ConfigOperator>
TemplateTreeNode::allowed_operators() const
{
list<ConfigOperator> result;
const BaseCommand* c = const_command("%allow-operator");
if (c == NULL)
return result;
const AllowOperatorsCommand* cmd;
cmd = dynamic_cast<const AllowOperatorsCommand *>(c);
if (cmd == NULL)
return result;
result = cmd->allowed_operators();
return result;
}
string
TemplateTreeNode::str() const
{
string tmp;
tmp = path() + " Type:" + typestr();
if (has_default()) {
tmp += " = " + default_str();
}
if (!_cmd_map.empty()) {
map<string, BaseCommand*>::const_iterator rpair;
rpair = _cmd_map.begin();
while (rpair != _cmd_map.end()) {
tmp += "\n " + rpair->second->str();
++rpair;
}
}
return tmp;
}
string
TemplateTreeNode::subtree_str() const
{
string s;
s = c_format("%s\n", str().c_str());
list<TemplateTreeNode*>::const_iterator iter;
for (iter = _children.begin(); iter != _children.end(); ++iter) {
s += (*iter)->subtree_str();
}
return s;
}
string
TemplateTreeNode::encoded_typestr() const
{
return "<" + typestr() + ">";
}
bool
TemplateTreeNode::type_match(const string&, string& ) const
{
return true;
}
BaseCommand*
TemplateTreeNode::command(const string& cmd_name)
{
map<string, BaseCommand *>::iterator iter;
iter = _cmd_map.find(cmd_name);
if (iter == _cmd_map.end())
return NULL;
return iter->second;
}
const BaseCommand*
TemplateTreeNode::const_command(const string& cmd_name) const
{
map<string, BaseCommand *>::const_iterator iter;
iter = _cmd_map.find(cmd_name);
if (iter == _cmd_map.end())
return NULL;
return iter->second;
}
string
TemplateTreeNode::strip_quotes(const string& s) const
{
size_t len = s.length();
if (len < 2)
return s;
if ((s[0] == '"') && (s[len - 1] == '"'))
return s.substr(1, len - 2);
else
return s;
}
bool
TemplateTreeNode::name_is_variable() const
{
if (_segname.size() < 4)
return false;
if (_segname[0] != '$' || _segname[1] != '(')
return false;
return true;
}
bool
TemplateTreeNode::expand_variable(const string& varname, string& value,
bool ignore_deleted_nodes) const
{
const TemplateTreeNode* varname_node;
UNUSED(ignore_deleted_nodes);
varname_node = find_const_varname_node(varname);
if (varname_node == NULL)
return false;
list<string> var_parts;
if (split_up_varname(varname, var_parts) == false) {
return false;
}
const string& nodename = var_parts.back();
XLOG_ASSERT((nodename == varname_node->segname())
|| (nodename == "DEFAULT"));
if (! varname_node->has_default())
return false; // XXX: the variable has no default value
value = varname_node->default_str();
return true;
}
bool
TemplateTreeNode::expand_expression(const string& expression,
string& value) const
{
// Expecting at least "`~" + a_name + "`"
if (expression.size() < 4) {
return false;
}
if ((expression[0] != '`') || (expression[expression.size() - 1] != '`'))
return false;
// Trim the back-quotes
string tmp_expr = expression.substr(1, expression.size() - 2);
//
// XXX: for now the only expression we can expand is the "~" boolean
// negation operator.
//
if (tmp_expr[0] != '~')
return false;
// Trim the operator
tmp_expr = tmp_expr.substr(1, expression.size() - 1);
// Expand the variable
string tmp_value;
if (expand_variable(tmp_expr, tmp_value, true) != true)
return false;
if (tmp_value == "false")
value = "true";
else if (tmp_value == "true")
value = "false";
else
return false;
return true;
}
void
TemplateTreeNode::set_subtree_module_name(const string& module_name)
{
//
// Recursively set the module name to the subtree below this node
//
_module_name = module_name;
list<TemplateTreeNode *>::iterator iter;
for (iter = _children.begin(); iter != _children.end(); ++iter) {
TemplateTreeNode* child = *iter;
child->set_subtree_module_name(module_name);
}
}
void
TemplateTreeNode::set_subtree_default_target_name(const string& default_target_name)
{
//
// Recursively set the default target name to the subtree below this node
//
_default_target_name = default_target_name;
list<TemplateTreeNode *>::iterator iter;
for (iter = _children.begin(); iter != _children.end(); ++iter) {
TemplateTreeNode* child = *iter;
child->set_subtree_default_target_name(default_target_name);
}
}
string
TemplateTreeNode::get_module_name_by_variable(const string& varname) const
{
const TemplateTreeNode* ttn;
ttn = find_const_varname_node(varname);
//
// Search all template tree nodes toward the root
// to find the module name.
//
while (ttn != NULL) {
string module_name = ttn->module_name();
if (module_name.length() > 0)
return (module_name);
ttn = ttn->parent();
}
return ""; // XXX: nothing found
}
string
TemplateTreeNode::get_default_target_name_by_variable(const string& varname) const
{
const TemplateTreeNode* ttn;
ttn = find_const_varname_node(varname);
if (ttn != NULL) {
//
// Search all template tree nodes toward the root
// to find the default target name.
//
for ( ; ttn != NULL; ttn = ttn->parent()) {
string default_target_name = ttn->default_target_name();
if (default_target_name.length() > 0)
return (default_target_name);
}
}
return ""; // XXX: nothing found
}
bool
TemplateTreeNode::split_up_varname(const string& varname,
list<string>& var_parts) const
{
if (varname.size() < 4)
return false;
if (varname[0] != '$'
|| varname[1] != '('
|| varname[varname.size() - 1] != ')') {
return false;
}
string trimmed = varname.substr(2, varname.size() - 3);
var_parts = split(trimmed, '.');
return true;
}
const TemplateTreeNode*
TemplateTreeNode::find_const_varname_node(const string& varname) const
{
//
// We need both const and non-const versions of find_varname_node,
// but don't want to write it all twice.
//
return (const_cast<TemplateTreeNode*>(this))->find_varname_node(varname);
}
TemplateTreeNode*
TemplateTreeNode::find_varname_node(const string& varname)
{
if (varname == "$(@)" /* current value of a node */
|| (varname == "$(DEFAULT)") /* default value of a node */
|| (varname == "$(<>)") /* operator for a terminal node */
|| (varname == "$(#)") /* the node ID of a node */
|| (varname == "$(" + _segname + ")") ) {
XLOG_ASSERT(! is_tag());
if (varname == "$(DEFAULT)") {
if (! has_default())
return NULL; // The template tree node has no default value
}
return this;
}
// Split varname
list<string> var_parts;
if (split_up_varname(varname, var_parts) == false) {
return NULL;
}
if (var_parts.front() == "@") {
return find_child_varname_node(var_parts);
}
if (var_parts.size() > 1) {
// It's a parent node, or a child of a parent node
return find_parent_varname_node(var_parts);
}
//
// XXX: if not referring to this node, then size of 0 or 1
// is not valid syntax.
//
return NULL;
}
TemplateTreeNode*
TemplateTreeNode::find_parent_varname_node(const list<string>& var_parts)
{
if (_parent == NULL) {
//
// We have reached the root node.
// Search among the children.
//
list<TemplateTreeNode* >::iterator iter;
for (iter = _children.begin(); iter != _children.end(); ++iter) {
TemplateTreeNode* found_child;
found_child = (*iter)->find_child_varname_node(var_parts);
if (found_child != NULL)
return found_child;
}
return NULL;
}
if (is_tag() || (type() == NODE_VOID)) {
// When naming a parent node variable, you must start with a tag
if (_segname == var_parts.front()) {
// We've found the right place to start
return find_child_varname_node(var_parts);
}
}
return _parent->find_parent_varname_node(var_parts);
}
TemplateTreeNode*
TemplateTreeNode::find_child_varname_node(const list<string>& var_parts)
{
if ((var_parts.front() != "@") && (var_parts.front() != _segname)) {
// varname doesn't match us
return NULL;
}
// The name might refer to this node
if (var_parts.size() == 1) {
if ((var_parts.front() == "@")
|| (var_parts.front() == _segname)
|| (var_parts.front() == "<>")
|| (var_parts.front() == "#")) {
return this;
}
}
// The name might refer to the default value of this node
if ((var_parts.size() == 2) && (var_parts.back() == "DEFAULT")) {
if ((var_parts.front() == "@") || (var_parts.front() == _segname)) {
// The name refers to the default value of this node
if (! has_default())
return NULL; // The template tree node has no default value
return this;
}
}
// The name might refer to the operator value of this node
if ((var_parts.size() == 2) && (var_parts.back() == "<>")) {
if ((var_parts.front() == "@") || (var_parts.front() == _segname)) {
return this;
}
}
// The name might refer to the node ID of this node
if ((var_parts.size() == 2) && (var_parts.back() == "#")) {
if ((var_parts.front() == "@") || (var_parts.front() == _segname)) {
return this;
}
}
// The name might refer to a child of ours
list<string> child_var_parts = var_parts;
child_var_parts.pop_front();
list<TemplateTreeNode* >::iterator iter;
for (iter = _children.begin(); iter != _children.end(); ++iter) {
TemplateTreeNode* found_child;
found_child = (*iter)->find_child_varname_node(child_var_parts);
if (found_child != NULL)
return found_child;
}
return NULL;
}
const TemplateTreeNode*
TemplateTreeNode::find_first_deprecated_ancestor() const
{
const TemplateTreeNode* ttn = _parent;
const TemplateTreeNode* deprecated_ttn = NULL;