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#ifndef _EXPR_H
#define _EXPR_H
#include "ledger.h"
#include "value.h"
#include "error.h"
namespace ledger {
class mask_t
{
public:
bool exclude;
std::string pattern;
void * regexp;
explicit mask_t(const std::string& pattern);
mask_t(const mask_t&);
~mask_t();
bool match(const std::string& str) const;
};
struct details_t
{
const entry_t * entry;
const transaction_t * xact;
const account_t * account;
details_t(const entry_t * _entry)
: entry(_entry), xact(NULL), account(NULL) {}
details_t(const transaction_t * _xact)
: entry(_xact->entry), xact(_xact), account(_xact->account) {}
details_t(const account_t * _account)
: entry(NULL), xact(NULL), account(_account) {}
};
struct value_expr_t
{
enum kind_t {
// Constants
CONSTANT_I,
CONSTANT_T,
CONSTANT_A,
// Item details
AMOUNT,
COST,
DATE,
CLEARED,
REAL,
INDEX,
DEPTH,
// Item totals
COUNT,
TOTAL,
COST_TOTAL,
// Relating to format_t
VALUE_EXPR,
TOTAL_EXPR,
// Functions
F_ARITH_MEAN,
F_VALUE,
F_NEG,
F_ABS,
F_STRIP,
F_PAYEE_MASK,
F_ACCOUNT_MASK,
F_SHORT_ACCOUNT_MASK,
// Binary operators
O_ADD,
O_SUB,
O_MUL,
O_DIV,
O_EQ,
O_LT,
O_LTE,
O_GT,
O_GTE,
O_NOT,
O_AND,
O_OR,
O_QUES,
O_COL,
LAST
};
kind_t kind;
value_expr_t * left;
value_expr_t * right;
union {
std::time_t constant_t;
unsigned int constant_i;
};
amount_t constant_a;
mask_t * mask;
value_expr_t(const kind_t _kind)
: kind(_kind), left(NULL), right(NULL), mask(NULL) {}
~value_expr_t() {
if (mask) delete mask;
if (left) delete left;
if (right) delete right;
}
void compute(value_t& result, const details_t& details,
value_t::type_t type = value_t::ANY) const;
void compute(balance_t& result, const details_t& details) const {
value_t value;
compute(value, details, value_t::BALANCE);
result = value.operator balance_t();
}
};
value_expr_t * parse_value_expr(std::istream& in);
inline value_expr_t * parse_value_expr(const char * p) {
std::istringstream stream(p);
return parse_value_expr(stream);
}
inline value_expr_t * parse_value_expr(const std::string& str) {
return parse_value_expr(str.c_str());
}
#ifdef DEBUG_ENABLED
void dump_value_expr(std::ostream& out, const value_expr_t * node);
#endif
template <typename T>
class item_predicate
{
const value_expr_t * predicate;
public:
item_predicate(const std::string& _predicate) {
predicate = NULL;
if (! _predicate.empty()) {
try {
#ifdef DEBUG_ENABLED
DEBUG_CLASS("valexpr.predicate.parse");
DEBUG_PRINT_("parsing: '" << _predicate << "'");
#endif
predicate = parse_value_expr(_predicate);
#ifdef DEBUG_ENABLED
if (DEBUG_() && ledger::debug_stream) {
*ledger::debug_stream << "dump: ";
dump_value_expr(*ledger::debug_stream, predicate);
*ledger::debug_stream << std::endl;
}
#endif
}
catch (const value_expr_error& err) {
std::cerr << "Error in predicate '" << _predicate << "': "
<< err.what() << std::endl;
std::exit(1);
}
}
}
item_predicate(const value_expr_t * _predicate)
: predicate(_predicate) {}
~item_predicate() {
if (predicate)
delete predicate;
}
bool operator()(const T * item) const {
if (predicate) {
value_t result;
predicate->compute(result, details_t(item));
return result;
} else {
return true;
}
}
};
} // namespace report
#endif // _REPORT_H
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