int
classad_evaluate_boolean_expr(const char *s_in, const classad_expr_tree t_ex,
int *result)
{
ClassAd *ad;
ClassAdParser parser;
if (s_in == NULL || t_ex == NULL || result == NULL)
return C_CLASSAD_INVALID_ARG;
ExprTree *et = (ExprTree *)t_ex;
ad = parser.ParseClassAd(s_in);
if (ad == NULL) return C_CLASSAD_PARSE_ERROR;
int retcod = C_CLASSAD_NO_ERROR;
Value v;
et->SetParentScope(ad);
ad->EvaluateExpr(et, v);
et->SetParentScope(NULL);
bool tmp_res;
if (v.IsBooleanValue( tmp_res ))
{
if (tmp_res) *result = 1;
else *result = 0;
retcod = C_CLASSAD_NO_ERROR;
}
else retcod = C_CLASSAD_INVALID_VALUE;
delete ad;
return retcod;
}
bool
Metric::evaluate(char const *attr_name,classad::Value &result,classad::ClassAd &metric_ad,classad::ClassAd const &daemon_ad,MetricTypeEnum type,ExtArray<MyString> *regex_groups,char const *regex_attr)
{
bool retval = true;
ExprTree *expr = NULL;
if( !(expr=metric_ad.Lookup(attr_name)) ) {
return true;
}
classad::ClassAd const *ad = &daemon_ad;
ClassAd daemon_ad_copy;
if( regex_attr ) {
// make a modifiable copy of daemon_ad and insert regex_attr = regex_attr, so the user-defined expression can refer to it
daemon_ad_copy = daemon_ad;
ad = &daemon_ad_copy;
daemon_ad_copy.AssignExpr(ATTR_REGEX,regex_attr);
}
expr->SetParentScope(ad);
if( !ad->EvaluateExpr(expr,result) ||
(type == STRING && !result.IsStringValue()) ||
(type == DOUBLE && !result.IsNumber()) ||
(type == FLOAT && !result.IsNumber()) ||
(type == INT8 && !result.IsIntegerValue()) ||
(type == UINT8 && !result.IsIntegerValue()) ||
(type == INT16 && !result.IsIntegerValue()) ||
(type == UINT16 && !result.IsIntegerValue()) ||
(type == INT32 && !result.IsIntegerValue()) ||
(type == UINT32 && !result.IsIntegerValue()) ||
(type == BOOLEAN && !result.IsBooleanValue()) )
{
retval = false;
classad::ClassAdUnParser unparser;
std::string expr_str;
unparser.Unparse(expr_str,expr);
dprintf(D_FULLDEBUG,"Failed to evaluate the following%s%s: %s=%s\n",
name.empty() ? "" : " attribute of metric ",
name.c_str(),
attr_name,
expr_str.c_str());
}
expr->SetParentScope(&metric_ad);
// do regex macro substitutions
if( regex_groups && regex_groups->length() > 0 ) {
std::string str_value;
if( result.IsStringValue(str_value) && str_value.find("\\")!=std::string::npos ) {
std::string new_str_value;
const char *ch = str_value.c_str();
while( *ch ) {
if( *ch == '\\' ) {
ch++;
if( !isdigit(*ch) ) {
new_str_value += *(ch++);
}
else {
char *endptr = NULL;
long index = strtol(ch,&endptr,10);
ch = endptr;
if( index < regex_groups->length() ) {
new_str_value += (*regex_groups)[index];
}
}
}
else {
new_str_value += *(ch++);
}
}
result.SetStringValue(new_str_value);
}
}
return retval;
}
/*********************************************************************
*
* Function: process_evaluate
* Purpose: Given a line that begins with "evaluate", parse the rest
* of the line and perform the evaluation.
*
*********************************************************************/
static void process_evaluate(const string &line,
int token_start, int line_number,
const Parameters ¶meters,
ErrorCount *errors)
{
string classad_name, expression_string;
ExprTree *expr;
ClassAdParser parser;
classad_name = extract_token(&token_start, line);
expr = NULL;
if ((unsigned) token_start < line.size()) {
expression_string = line.substr(token_start, line.size() - token_start);
} else {
expression_string = "";
}
if (!classad_name.compare("")
|| !expression_string.compare("")) {
cout << "Error: Missing evaluate information on line " << line_number
<< "." << endl;
cout << " Format: evaluate <classad> <expression>"
<< endl;
errors->IncrementErrors();
}
else {
if (!parser.ParseExpression(expression_string, expr)) {
cout << "Error: Can't parse expression (" << expression_string
<< ") on line " << line_number << "." << endl;
errors->IncrementErrors();
}
else {
ClassAd *classad = classads[classad_name];
if (classad == NULL) {
cout << "Error: Unknown ClassAd: \"" << classad_name
<< "\" on line " << line_number << "." << endl;
errors->IncrementErrors();
}
else {
Value value;
expr->SetParentScope(classad);
if (!classad->EvaluateExpr(expr, value)) {
cout << "Error: Can't evaluate expression (" << expression_string
<< ") on line " <<line_number << "." << endl;
errors->IncrementErrors();
}
else {
PrettyPrint unparser;
string value_string;
unparser.Unparse(value_string, value);
cout << "OK: Evaluating \"" << expression_string
<< "\" in " << classad_name
<< " evaluates to " << value_string
<< " on line " << line_number << endl;
}
}
}
}
if (expr != NULL) {
delete expr;
}
return;
}
