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/******************************************************************************
* listkey.cpp - code for base class 'ListKey'. ListKey is the basis for all
* types of keys that have lists of specified indexes
* (e.g. a list of verses, place, etc.)
*/
#include <utilfuns.h>
#include <string.h>
#include <stdlib.h>
#include <swkey.h>
#include <listkey.h>
static const char *classes[] = {"ListKey", "SWKey", "SWObject", 0};
SWClass ListKey::classdef(classes);
/******************************************************************************
* ListKey Constructor - initializes instance of ListKey
*
* ENT: ikey - text key
*/
ListKey::ListKey(const char *ikey): SWKey(ikey) {
arraymax = 0;
ClearList();
init();
}
ListKey::ListKey(ListKey const &k) : SWKey(k.keytext) {
arraymax = k.arraymax;
arraypos = k.arraypos;
arraycnt = k.arraycnt;
array = (arraymax)?(SWKey **)malloc(k.arraymax * sizeof(SWKey *)):0;
for (int i = 0; i < arraycnt; i++)
array[i] = k.array[i]->clone();
init();
}
void ListKey::init() {
myclass = &classdef;
}
SWKey *ListKey::clone() const
{
return new ListKey(*this);
}
/******************************************************************************
* ListKey Destructor - cleans up instance of ListKey
*/
ListKey::~ListKey()
{
ClearList();
}
/******************************************************************************
* ListKey::ClearList - Clears out elements of list
*/
void ListKey::ClearList()
{
int loop;
if (arraymax) {
for (loop = 0; loop < arraycnt; loop++)
delete array[loop];
free(array);
arraymax = 0;
}
arraycnt = 0;
arraypos = 0;
array = 0;
}
/******************************************************************************
* ListKey::copyFrom Equates this ListKey to another ListKey object
*
* ENT: ikey - other ListKey object
*/
void ListKey::copyFrom(const ListKey &ikey) {
ClearList();
arraymax = ikey.arraymax;
arraypos = ikey.arraypos;
arraycnt = ikey.arraycnt;
array = (arraymax)?(SWKey **)malloc(ikey.arraymax * sizeof(SWKey *)):0;
for (int i = 0; i < arraycnt; i++)
array[i] = ikey.array[i]->clone();
SetToElement(0);
}
/******************************************************************************
* ListKey::add - Adds an element to the list
*/
void ListKey::add(const SWKey &ikey) {
if (++arraycnt > arraymax) {
array = (SWKey **) ((array) ? realloc(array, (arraycnt + 32) * sizeof(SWKey *)) : calloc(arraycnt + 32, sizeof(SWKey *)));
arraymax = arraycnt + 32;
}
array[arraycnt-1] = ikey.clone();
SetToElement(arraycnt-1);
}
/******************************************************************************
* ListKey::setPosition(SW_POSITION) - Positions this key
*
* ENT: p - position
*
* RET: *this
*/
void ListKey::setPosition(SW_POSITION p) {
switch (p) {
case 1: // GCC won't compile P_TOP
SetToElement(0);
break;
case 2: // GCC won't compile P_BOTTOM
SetToElement(arraycnt-1);
break;
}
}
/******************************************************************************
* ListKey::increment - Increments a number of elements
*/
void ListKey::increment(int step) {
if (step < 0) {
decrement(step*-1);
return;
}
Error(); // clear error
for(; step && !Error(); step--) {
if (arraypos < arraycnt) {
(*(array[arraypos]))++;
if (array[arraypos]->Error()) {
SetToElement(arraypos+1);
}
else *this = (const char *)(*array[arraypos]);
}
else error = KEYERR_OUTOFBOUNDS;
}
}
/******************************************************************************
* ListKey::decrement - Decrements a number of elements
*/
void ListKey::decrement(int step) {
if (step < 0) {
increment(step*-1);
return;
}
Error(); // clear error
for(; step && !Error(); step--) {
if (arraypos > -1) {
(*(array[arraypos]))--;
if (array[arraypos]->Error()) {
SetToElement(arraypos-1, BOTTOM);
}
else *this = (const char *)(*array[arraypos]);
}
else error = KEYERR_OUTOFBOUNDS;
}
}
/******************************************************************************
* ListKey::Count - Returns number of elements in list
*/
int ListKey::Count() {
return arraycnt;
}
/******************************************************************************
* ListKey::SetToElement - Sets key to element number
*
* ENT: ielement - element number to set to
*
* RET: error status
*/
char ListKey::SetToElement(int ielement, SW_POSITION pos) {
arraypos = ielement;
if (arraypos >= arraycnt) {
arraypos = (arraycnt>0)?arraycnt - 1:0;
error = KEYERR_OUTOFBOUNDS;
}
else {
if (arraypos < 0) {
arraypos = 0;
error = KEYERR_OUTOFBOUNDS;
}
else {
error = 0;
}
}
if (arraycnt) {
(*array[arraypos]) = pos;
*this = (const char *)(*array[arraypos]);
}
else *this = "";
return error;
}
/******************************************************************************
* ListKey::GetElement - Gets a key element number
*
* ENT: pos - element number to get (or default current)
*
* RET: Key or null on error
*/
SWKey *ListKey::GetElement(int pos) {
if (pos >=0) {
if (pos >=arraycnt)
error = KEYERR_OUTOFBOUNDS;
}
else pos = arraypos;
return (error) ? 0:array[pos];
}
/******************************************************************************
* ListKey::Remove - Removes current element from list
*/
void ListKey::Remove() {
if ((arraypos > -1) && (arraypos < arraycnt)) {
delete array[arraypos];
if (arraypos < arraycnt - 1)
memmove(&array[arraypos], &array[arraypos+1], (arraycnt - arraypos - 1) * sizeof(SWKey *));
arraycnt--;
SetToElement((arraypos)?arraypos-1:0);
}
}
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