integration/luprex/core/cpp/table.hpp

////////////////////////////////////////////////////////////
//
// TABLE
//
// This module contains a library of lua functions
// for manipulating tables.  Some of the functions only
// work on vectors (ie, tables with integer keys starting
// at one).  When a function only works on vectors, it
// is noted.
//
// QUEUE
//
// This module contains a library of lua functions for
// manipulating queues.  Queues are represented as a table
// with a "head" and a "tail", and with integer-keyed values.
// For example:
//
//      {
//        "tail": 100,
//        "head": 103,
//        100: "a",
//        101: "b",
//        102: "c"
//      }
//
// Values are pushed onto the head, and values are popped
// from the tail.
//
////////////////////////////////////////////////////////////


#ifndef TABLE_HPP
#define TABLE_HPP

#include "luastack.hpp"

// table_equal
//
// True if two tables contain the same key/value pairs.
//
int table_equal(lua_State *L);

// table_findremove
//
// Given a vector and a value, remove the specified value from
// the vector, and shift elements downward to fill the gaps.
//
int table_findremove(lua_State *L);

// table_push
//
// Given a vector and a value, push the value onto the end.
//
int table_push(lua_State *L);

// table_find
//
// Given a vector and a value, search for the first occurrence
// of that value.  Return the index.
//
int table_find(lua_State *L);

// table_empty
//
// Return true if the table has no key/value pairs.
//
int table_empty(lua_State *L);

// table_count
//
// Return the number of key/value pairs in the table.
//
int table_count(lua_State *L);

// table_clear
//
// Remove all key/value pairs from the table.  Does not
// remove the metatable.
//
int table_clear(lua_State *L);

//
// Create and return an empty queue.  Queues are implemented
// as tables which are used as dynamically-expandable circular
// buffers.
//
int deque_create(lua_State *L);

//
// Given a deque and a value, pushes the value onto the
// left or right end.
//
int deque_pushl(lua_State *L);
int deque_pushr(lua_State *L);

//
// Given a deque, pop from the left or right end.  Returns the
// value and removes it from the deque.   If the deque is
// empty, returns nil.
//
int deque_popl(lua_State *L);
int deque_popr(lua_State *L);

//
// Return the nth element from the left or right end of a deque. 
//
int deque_nthl(lua_State *L);
int deque_nthr(lua_State *L);

//
// Return the number of values in the deque.
//
int deque_size(lua_State *L);


#endif // TABLE_HPP