static void
cpbPushContent (const wchar_t *characters, size_t length) {
if (length > 0) {
Queue *queue = cpbGetHistoryQueue(1);
if (queue) {
Element *element = getQueueTail(queue);
if (element) {
const HistoryEntry *entry = getElementItem(element);
if (length == entry->length) {
if (wmemcmp(characters, entry->characters, length) == 0) {
return;
}
}
}
{
HistoryEntry *entry;
if ((entry = malloc(sizeof(*entry)))) {
if ((entry->characters = cpbAllocateCharacters(length))) {
wmemcpy(entry->characters, characters, length);
entry->length = length;
if (enqueueItem(queue, entry)) {
return;
}
free(entry->characters);
} else {
logMallocError();
}
free(entry);
} else {
logMallocError();
}
}
}
}
}
static wchar_t *
cpbReadScreen (size_t *length, int fromColumn, int fromRow, int toColumn, int toRow) {
wchar_t *newBuffer = NULL;
int columns = toColumn - fromColumn + 1;
int rows = toRow - fromRow + 1;
if ((columns >= 1) && (rows >= 1) && (beginOffset >= 0)) {
wchar_t fromBuffer[rows * columns];
if (readScreenText(fromColumn, fromRow, columns, rows, fromBuffer)) {
wchar_t toBuffer[rows * (columns + 1)];
wchar_t *toAddress = toBuffer;
const wchar_t *fromAddress = fromBuffer;
int row;
for (row=fromRow; row<=toRow; row+=1) {
int column;
for (column=fromColumn; column<=toColumn; column+=1) {
wchar_t character = *fromAddress++;
if (iswcntrl(character) || iswspace(character)) character = WC_C(' ');
*toAddress++ = character;
}
if (row != toRow) *toAddress++ = WC_C('\r');
}
/* make a new permanent buffer of just the right size */
{
size_t newLength = toAddress - toBuffer;
if ((newBuffer = cpbAllocateCharacters(newLength))) {
wmemcpy(newBuffer, toBuffer, (*length = newLength));
}
}
}
}
return newBuffer;
}
int
cpbAddContent (const wchar_t *characters, size_t length) {
size_t newLength = clipboardLength + length;
if (newLength > clipboardSize) {
size_t newSize = newLength | 0XFF;
wchar_t *newCharacters = cpbAllocateCharacters(newSize);
if (!newCharacters) {
logMallocError();
return 0;
}
wmemcpy(newCharacters, clipboardCharacters, clipboardLength);
if (clipboardCharacters) free(clipboardCharacters);
clipboardCharacters = newCharacters;
clipboardSize = newSize;
}
wmemcpy(&clipboardCharacters[clipboardLength], characters, length);
clipboardLength += length;
return 1;
}
