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#ifndef _VALEXPR_H
#define _VALEXPR_H
#include "journal.h"
#include "value.h"
#include "error.h"
#include "mask.h"
#include <memory>
namespace ledger {
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) {
DEBUG_PRINT("ledger.memory.ctors", "ctor details_t");
}
details_t(const transaction_t& _xact);
details_t(const account_t& _account)
: entry(NULL), xact(NULL), account(&_account) {
DEBUG_PRINT("ledger.memory.ctors", "ctor details_t");
}
#ifdef DEBUG_ENABLED
~details_t() {
DEBUG_PRINT("ledger.memory.dtors", "dtor details_t");
}
#endif
};
struct value_expr_t
{
enum kind_t {
// Constants
CONSTANT_I,
CONSTANT_T,
CONSTANT_A,
// Item details
AMOUNT,
COST,
DATE,
CLEARED,
PENDING,
REAL,
ACTUAL,
INDEX,
DEPTH,
// Item totals
COUNT,
TOTAL,
COST_TOTAL,
// Relating to format_t
VALUE_EXPR,
TOTAL_EXPR,
// Functions
F_NOW,
F_PARENT,
F_ARITH_MEAN,
F_VALUE,
F_FUNC,
F_NEG,
F_ABS,
F_STRIP,
F_CODE_MASK,
F_PAYEE_MASK,
F_NOTE_MASK,
F_ACCOUNT_MASK,
F_SHORT_ACCOUNT_MASK,
F_COMMODITY_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,
O_ARG,
LAST
};
kind_t kind;
value_expr_t * left;
value_expr_t * right;
union {
std::time_t constant_t;
long constant_i;
};
std::string constant_s;
amount_t constant_a;
mask_t * mask;
value_expr_t(const kind_t _kind)
: kind(_kind), left(NULL), right(NULL), mask(NULL) {
DEBUG_PRINT("ledger.memory.ctors", "ctor value_expr_t");
}
~value_expr_t() {
DEBUG_PRINT("ledger.memory.dtors", "dtor value_expr_t");
if (mask) delete mask;
if (left) delete left;
if (right) delete right;
}
void compute(value_t& result, const details_t& details) const;
};
extern std::auto_ptr<value_expr_t> amount_expr;
extern std::auto_ptr<value_expr_t> total_expr;
extern std::time_t terminus;
bool compute_amount(value_expr_t * expr, amount_t& amt, transaction_t& xact);
inline void compute_amount(value_t& result, const details_t& details) {
if (amount_expr.get())
amount_expr->compute(result, details);
}
inline void compute_total(value_t& result, const details_t& details) {
if (total_expr.get())
total_expr->compute(result, details);
}
value_expr_t * parse_value_expr(std::istream& in,
const bool partial = false);
inline value_expr_t * parse_value_expr(const char * p,
const bool partial = false) {
std::istringstream stream(p);
return parse_value_expr(stream, partial);
}
inline value_expr_t * parse_value_expr(const std::string& str,
const bool partial = false) {
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;
bool allocated;
public:
item_predicate(const std::string& _predicate)
: predicate(NULL), allocated(false) {
DEBUG_PRINT("ledger.memory.ctors", "ctor item_predicate<T>");
if (! _predicate.empty()) {
try {
predicate = parse_value_expr(_predicate);
allocated = true;
}
catch (value_expr_error& err) {
throw value_expr_error(std::string("In predicate '") +
_predicate + "': " + err.what());
}
}
}
item_predicate(const value_expr_t * _predicate = NULL)
: predicate(_predicate), allocated(false) {
DEBUG_PRINT("ledger.memory.ctors", "ctor item_predicate<T>");
}
~item_predicate() {
DEBUG_PRINT("ledger.memory.dtors", "dtor item_predicate<T>");
if (predicate && allocated)
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 ledger
#endif // _VALEXPR_H
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