// destructor
void DataVault_dtor (DataVaultPtr self)
{
if (self) {
DataCache_Destroy(self->cache);
IOStream_Destroy(self->stream);
WIPEPTR(self);
}
}
// destructor
static void DataVault_dtor(DataVaultPtr self)
{
if (self) {
DataCache_Destroy(self->cache);
IOStream_Destroy(self->stream);
esif_ccb_lock_uninit(&self->lock);
WIPEPTR(self);
}
}
// Write DataVault to Disk
eEsifError DataVault_WriteVault(DataVaultPtr self)
{
eEsifError rc = ESIF_OK;
DataCacheEntryPtr pairPtr = NULL;
IOStreamPtr diskStreamPtr = NULL;
IOStreamPtr memStreamPtr = NULL;
BytePtr memStreamBuffer = NULL;
size_t memStreamBufSize = 0;
UInt32 idx;
DataCachePtr cacheClonePtr = NULL;
if (FLAGS_TEST(self->flags, ESIF_SERVICE_CONFIG_STATIC | ESIF_SERVICE_CONFIG_READONLY)) {
rc = ESIF_E_READONLY;
goto exit;
}
if (self->stream->file.name == NULL || self->cache == NULL) {
rc = ESIF_E_PARAMETER_IS_NULL;
goto exit;
}
//
// As the cache data can be modified while writing the data vault (due to
// non-cached values), we create a clone of the current cache so that we can
// fall back to it in case of a failure.
//
cacheClonePtr = DataCache_Clone(self->cache);
if ((NULL == cacheClonePtr) && (self->cache != NULL)) {
rc = ESIF_E_NO_MEMORY;
goto exit;
}
//
// Use a memory stream for creation before writing the final output to a file
//
memStreamPtr = IOStream_Create();
if (!memStreamPtr) {
rc = ESIF_E_NO_MEMORY;
goto exit;
}
if (IOStream_SetMemory(memStreamPtr, NULL, 0) != EOK) {
rc = ESIF_E_NO_MEMORY;
goto exit;
}
//
// If any rows contain NOCACHE PERSIST values, we need to read them from the
// original file before we overwrite it
//
diskStreamPtr = IOStream_Create();
if (diskStreamPtr == NULL) {
rc = ESIF_E_NO_MEMORY;
goto exit;
}
if (IOStream_Seek(memStreamPtr, sizeof(DataVaultHeader), SEEK_CUR) != EOK) {
rc = ESIF_E_IO_ERROR;
goto exit;
}
//
// Write the key/value pairs to the memory stream for each data category
// Fill in the data header for each category after the key/value pairs are written
// Note: Only write persisted data
//
// Write All Persisted Rows from Sorted List to DataVault
for (idx = 0; rc == ESIF_OK && idx < self->cache->size; idx++) {
pairPtr = &self->cache->elements[idx];
if (!(pairPtr->flags & ESIF_SERVICE_CONFIG_PERSIST)) {
continue;
}
rc = DataVault_WriteKeyValuePair(self, pairPtr, memStreamPtr);
if (rc != ESIF_OK) {
goto exit;
}
}
//
// Now go back and complete the headers
// Fill in and write the main header
//
if (IOStream_Open(memStreamPtr) != EOK) {
rc = ESIF_E_IO_ERROR;
goto exit;
}
DataVaultHeader header = { 0 };
esif_ccb_memcpy(&header.signature, ESIFDV_SIGNATURE, sizeof(header.signature));
header.headersize = sizeof(header);
header.version = ESIFDV_VERSION(1, 0, ESIFDV_REVISION);
header.flags = self->flags;
if (IOStream_Write(memStreamPtr, &header, sizeof(header)) != sizeof(header)) {
rc = ESIF_E_IO_ERROR;
goto exit;
}
memStreamBuffer = IOStream_GetMemoryBuffer(memStreamPtr);
memStreamBufSize = IOStream_GetSize(memStreamPtr);
//
// Now write the memory stream to the disk
//
if (rc == ESIF_OK && IOStream_OpenFile(diskStreamPtr, self->stream->file.name, "wb") != EOK) {
rc = ESIF_E_IO_OPEN_FAILED;
goto exit;
}
if (rc == ESIF_OK && (IOStream_Write(diskStreamPtr, memStreamBuffer, memStreamBufSize) != memStreamBufSize)) {
rc = ESIF_E_IO_ERROR;
goto exit;
}
exit:
IOStream_Destroy(diskStreamPtr);
IOStream_Destroy(memStreamPtr);
if (rc != ESIF_OK && cacheClonePtr != NULL) {
DataCache_Destroy(self->cache);
self->cache = cacheClonePtr;
} else {
DataCache_Destroy(cacheClonePtr);
}
return rc;
}
/* Set */
eEsifError DataVault_SetValue (
DataVaultPtr self,
EsifDataPtr path,
EsifDataPtr value,
esif_flags_t flags
)
{
eEsifError rc = ESIF_OK;
DataCacheEntryPtr keypair;
if (FLAGS_TEST(self->flags, ESIF_SERVICE_CONFIG_STATIC | ESIF_SERVICE_CONFIG_READONLY)) {
return ESIF_E_READONLY;
}
// Ignore value for DELETEs
if (FLAGS_TEST(flags, ESIF_SERVICE_CONFIG_DELETE)) {
value = NULL;
}
// TODO: Locking
// AUTO data types or AUTO_ALLOCATE are not allowed for SET
if (value && (value->type == ESIF_DATA_AUTO || value->buf_len == ESIF_DATA_ALLOCATE)) {
return ESIF_E_UNSUPPORTED_RESULT_DATA_TYPE;
}
// Write to Log
DataVault_WriteLog(self, (flags & ESIF_SERVICE_CONFIG_DELETE ? "DELETE" : "SET"), self->name, path, flags, value);
// Delete entire DataVault?
if (strcmp((esif_string)path->buf_ptr, "*") == 0) {
if (flags & ESIF_SERVICE_CONFIG_DELETE) {
DataCache_Destroy(self->cache);
if ((self->cache = DataCache_Create()) == NULL) {
return ESIF_E_NO_MEMORY;
}
DataVault_WriteVault(self);
return ESIF_OK;
}
return ESIF_E_NOT_SUPPORTED;// "*" is an invalid key value
}
// Read data from File
// TODO: Change Parser Logic and Syntax instead
if (value && value->buf_ptr && esif_ccb_strncmp((char*)value->buf_ptr, "<<", 2) == 0) {
void *buffer = 0;
UInt32 buflen = 0;
if (DataVault_ReadFile(self, (char*)value->buf_ptr + 2, &buffer, &buflen) == ESIF_OK) {
value->buf_ptr = buffer;
if (value->type == ESIF_DATA_STRING) {
buflen++; // Include Null Terminator
}
value->buf_len = value->data_len = buflen;
} else {
return ESIF_E_UNSPECIFIED; // TODO: File Not Found
}
}
// Get the Data Row or create it if it does not exist
keypair = DataCache_GetValue(self->cache, (esif_string)path->buf_ptr);
if (keypair) { // Match Found
// READONLY?
if (keypair->flags & ESIF_SERVICE_CONFIG_READONLY) {
rc = ESIF_E_READONLY;
}
// DELETE?
else if (flags & ESIF_SERVICE_CONFIG_DELETE) {
flags |= keypair->flags;
DataCache_Delete(self->cache, (esif_string)path->buf_ptr);
} else if (value && value->buf_ptr) {
// UPDATE
#ifdef ESIF_ATTR_OS_WINDOWS
// Update Registry Value for REGKEY values if REGLINK is *NOT* specified in SET command
if ((keypair->flags & ESIF_SERVICE_CONFIG_REGLINK) && !(flags & ESIF_SERVICE_CONFIG_REGLINK)) {
keypair->value.type = value->type;
rc = DataVault_WriteRegistry(self, (esif_string)keypair->value.buf_ptr, value);
} else // ...
#endif
if (keypair->value.buf_len && value->data_len > keypair->value.buf_len) {
rc = ESIF_E_NEED_LARGER_BUFFER;
} else {
keypair->flags = flags;
keypair->value.type = value->type;
keypair->value.data_len = value->data_len;
// Replace the File Offset stored in buf_ptr with a copy of the data for updated NOCACHE values
if (keypair->flags & ESIF_SERVICE_CONFIG_NOCACHE && keypair->value.buf_len == 0) {
keypair->value.buf_ptr = esif_ccb_malloc(value->data_len);
keypair->value.buf_len = value->data_len;
}
esif_ccb_memcpy(keypair->value.buf_ptr, value->buf_ptr, value->data_len);
rc = ESIF_OK;
}
}
} else if (value && value->buf_ptr && !(flags & ESIF_SERVICE_CONFIG_DELETE)) {
// Copy Key/Value Pair to new Data Row
EsifData newkey = {ESIF_DATA_STRING, esif_ccb_strdup((esif_string)path->buf_ptr), path->data_len, path->data_len};
EsifData newvalue = {value->type, esif_ccb_malloc(esif_ccb_max(value->buf_len, value->data_len)), value->data_len, value->data_len};
esif_ccb_memcpy(newvalue.buf_ptr, value->buf_ptr, value->data_len);
DataCache_SetValue(self->cache, (esif_string)newkey.buf_ptr, newvalue, flags);
esif_ccb_free(newkey.buf_ptr);
}
// If Persisted, Flush to disk
if (rc == ESIF_OK && FLAGS_TEST(flags, ESIF_SERVICE_CONFIG_PERSIST)) {
DataVault_WriteVault(self);
}
return rc;
}
