bool Reference::updateOffset(FILE* file, long newOffset)
{
if(getFilePosition() > 0)
{
// save the current offset
long saveOffset = ftell(file);
// update the offset data for us
_offset = newOffset;
// seek this Reference object in the file.
fseek(file, getFilePosition(), SEEK_SET);
//Skip over the id string
skipString(file);
// Skip
skipUint(file);
// write over the old offset.
write(_offset, file);
// restore the offset.
fseek(file, saveOffset, SEEK_SET);
return true;
}
return false;
}
char *getPreviousList(ListItem *list) {
char *ret;
char buffer[READ_LENGTH+1];
int fileHandle;
char *line, *tempCursor;
int attempt,goodPass;
const int MAX_ATTEMPTS = 3;
if (list->currentFilePosition == -1)
ret = getCurrentList(list);
else {
for (attempt=0,goodPass=0;attempt < MAX_ATTEMPTS && !goodPass;attempt++) {
fileHandle = openList(list,NULL);
lseek(fileHandle,list->currentFilePosition,SEEK_SET);
buffer[READ_LENGTH] = '\0'; //prevents readLine from searching for \n past buffer
getLine(-1,0); // resets DONE
line = getLine(fileHandle,buffer);
if (!line)
line[0] = 0; //empty list
else {
do {
line = getLine(fileHandle,buffer);
} while (line && strspn(line," \x0a\x0d\x00"));
if (!line) {
// end of file -- move to start
line = getLine(fileHandle,0); // to reset DONE and move to BOF
list->currentFilePosition = 0;
line = getLine(fileHandle,buffer);
if (!line)
logException(9,0,RESET); //todo: format problem with list
}
list->currentFilePosition += getFilePosition();
}
close(fileHandle);
for (tempCursor = line;*tempCursor != 0x0a && *tempCursor != 0x0d && *tempCursor != 0x00;tempCursor++);
*tempCursor = 0x00;
strcpy(list->currentString,line);
ret = list->currentString;
if ((goodPass = goodString(ret,1)))
break;
else
logException(30,0,0);
}
if (!goodPass)
logException(30,0,RESET);
}
return ret;
}
