107 lines
1.7 KiB
C++
107 lines
1.7 KiB
C++
#ifndef _EXPR_H
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#define _EXPR_H
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#include "ledger.h"
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#include "balance.h"
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#include "constraint.h"
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namespace ledger {
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enum kind_t {
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// Constants
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CONSTANT_A,
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CONSTANT_T,
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// Item details
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AMOUNT,
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COST,
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DATE,
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INDEX,
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// Item totals
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BALANCE,
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COST_BALANCE,
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TOTAL,
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COST_TOTAL,
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// Constraint details
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BEGIN_DATE,
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END_DATE,
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// Functions
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F_ARITH_MEAN,
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F_VALUE,
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F_NEG,
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F_ABS,
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F_REGEXP,
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// Binary operators
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O_ADD,
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O_SUB,
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O_MUL,
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O_DIV,
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O_EQ,
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O_LT,
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O_LTE,
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O_GT,
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O_GTE,
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O_NOT,
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O_AND,
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O_OR,
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O_QUES,
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O_COL,
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LAST
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};
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struct node_t
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{
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kind_t type;
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node_t * left;
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node_t * right;
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amount_t constant_a;
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std::time_t constant_t;
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mask_t * mask;
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node_t(const kind_t _type)
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: type(_type), left(NULL), right(NULL) {}
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~node_t() {
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if (mask) delete mask;
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if (left) delete left;
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if (right) delete right;
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}
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balance_t compute(const item_t * item,
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const std::time_t begin = -1,
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const std::time_t end = -1) const;
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};
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node_t * parse_expr(std::istream& in, ledger_t * ledger);
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inline node_t * parse_expr(const char * p, ledger_t * ledger) {
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std::istringstream stream(p);
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return parse_expr(stream, ledger);
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}
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inline node_t * parse_expr(const std::string& str, ledger_t * ledger) {
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return parse_expr(str.c_str(), ledger);
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}
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inline node_t * find_node(node_t * node, kind_t type) {
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node_t * result = NULL;
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if (node->type == type)
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result = node;
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if (! result && node->left)
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result = find_node(node->left, type);
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if (! result && node->right)
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result = find_node(node->right, type);
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return result;
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}
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void dump_tree(std::ostream& out, node_t * node);
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} // namespace report
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#endif // _REPORT_H
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