/**
* Write the current checksum to file.
*/
void HybridMoblet::writeChecksum()
{
// Get checksum of the file system bundle.
int checksum = getFileUtil()->getFileSystemChecksum(1);
// Checksum file path.
MAUtil::String filePath = getFileUtil()->getLocalPath();
filePath += "MoSyncFileBundleChecksum";
// Save checksum value.
if (checksum != 0)
{
char checksumBuf[128];
sprintf(checksumBuf, "%d", checksum);
getFileUtil()->writeTextToFile(filePath, checksumBuf);
}
}
/**
* @return true if the checksum has changed (or if the old
* value did not exist, such as on first time load).
*/
bool HybridMoblet::checksumHasChanged()
{
// Assume checksum has changed (or does not exist).
bool hasChanged = true;
// Checksum file path.
MAUtil::String filePath = getFileUtil()->getLocalPath();
filePath += "MoSyncFileBundleChecksum";
// Read checksum of the file system bundle.
int checksum = getFileUtil()->getFileSystemChecksum(1);
// REad checksum from file and compare.
MAUtil::String data;
if (getFileUtil()->readTextFromFile(filePath, data))
{
// Read from file succeeded. Compate values.
int existingChecksum = (int)strtol(data.c_str(), NULL, 10);
hasChanged = checksum != existingChecksum;
}
return hasChanged;
}
/**
* Loads an image from a file and returns the handle to it.
*
* @param imagePath relative path to the image file.
*/
MAHandle ResourceMessageHandler::loadImageResource(const char* imagePath)
{
if (!getFileUtil())
{
return 0;
}
// Get the current apllication directory path.
String appPath = getFileUtil()->getAppPath();
// Construct image path.
char completePath[2048];
sprintf(completePath,
"%s%s",
appPath.c_str(),
imagePath);
// Load the image and create a data handle from it.
MAHandle imageFile = maFileOpen(completePath, MA_ACCESS_READ);
if (imageFile < 0)
{
return 0;
}
int fileSize = maFileSize(imageFile);
if (fileSize < 1)
{
return 0;
}
// Create buffer to hold file data.
MAHandle fileData = maCreatePlaceholder();
int result = maCreateData(fileData, fileSize);
if (RES_OK != result)
{
maDestroyPlaceholder(fileData);
return 0;
}
// Read data from file.
result = maFileReadToData(imageFile, fileData, 0, fileSize);
maFileClose(imageFile);
if (result < 0)
{
maDestroyPlaceholder(fileData);
return 0;
}
// Create image.
MAHandle imageHandle = maCreatePlaceholder();
result = maCreateImageFromData(
imageHandle,
fileData,
0,
maGetDataSize(fileData));
maDestroyPlaceholder(fileData);
if (RES_OK != result)
{
maDestroyPlaceholder(imageHandle);
return 0;
}
// Return the handle to the loaded image.
return imageHandle;
}
