offlineCalculateByFile

Generates bucket data in file format on the server for fast online query.

int offlineCalculateByFile(
    DG_TeeCtx *dgTeeCtx, 
    const DG_MpcFileInput *input, 
    DG_MpcFileOutput *output
)

Parameters

Parameter	Description	Value Range	Input/Output
dgTeeCtx	KCAL context	Context initialized in section initTeeCtx.	Input
input	DG_MpcFileInput	The value is not null.	Input
output	The type of the calculation result: DG_MpcFileOutput	The value is not null.	Output

Parameter

Description

Value Range

Input/Output

dgTeeCtx

KCAL context

Context initialized in section initTeeCtx.

Input

input

DG_MpcFileInput

The value is not null.

Input

output

The type of the calculation result:

DG_MpcFileOutput

The value is not null.

Output

**Table 1** DG_MpcFileInput structure
Name	Type	Description
filePath	char*	File path
pathLen	uint32_t	Path length
dataSize	uint64_t	Data size

**Table 2** DG_MpcFileOutput structure
Name	Type	Description
filePath	char*	File path
pathLen	uint32_t	Path length
dataSize	uint64_t	Data size

Return Values

Success: 0 is returned.
Failure: The error code is returned.

Error Codes

Value	Error Code	Description	Remarks
4515	DG_ERR_MPC_TEE_BUCKET_NUM_SET_ERROR	The number of buckets is incorrectly set.	-

Dependency

pirOpts depends on the successful initialization in section DG_InitPirOpts of the function group for the PIR operator.
The dependent header file is data_guard_mpc.h.

Example

Call the offlineCalculateByFile API using the pirOpts output of the successful DG_InitPirOpts call.

#include  "data_guard_mpc.h" 
DG_MpcFileInput teeFileInput;
teeFileInput.filePath = const_cast<char *>(inputFilePath.c_str());
teeFileInput.pathLen = static_cast<uint32_t>(inputFilePath.length());

DG_MpcFileOutput teeFileOutput;
teeFileOutput.filePath = const_cast<char *>(outputCachePath.c_str());
teeFileOutput.pathLen = static_cast<uint32_t>(outputCachePath.length());
return pirOpts->offlineCalculateByFile(dgTeeCtx_, &teeFileInput, &teeFileOutput);

Running result: res is 0 and output is not null.

Parent topic: PIR Operator