CRC32C Interface

Interface Description

Computes the CRC32C checksum for a character array.

Interface Format

uint32_t KsalCrc32c(uint32_t seed, uint8_t *data, uint64_t len);

Parameters

Parameter	Type	Description	Input/Output
seed	32-bit integer	Indicates the CRC seed.	Input
data	Character array	Indicates the character array for CRC.	Input
len	64-bit integer	Indicates the array length.	Input
crc	32-bit integer	Outputs the CRC checksum.	Output

Dependency

ksal/ksal_crc.h

Example

Write the CRC32C test code.

Create a test.c file.
```
vi test.c
```

Press i to enter the insert mode and add the following test code to the file:

#include <stdio.h>
#include <stdlib.h>
#include <ksal/ksal_crc.h>

int main(int argc, char **argv)
{
    uint8_t buf[4096];
    for (size_t i = 0; i < sizeof(buf); ++i) {
        buf[i] = (int8_t)i & 0xff;
    }
    uint32_t crc = KsalCrc32c(0x123, buf, sizeof(buf));
    printf("crc = 0x%x\r\n", crc);
    return 0;
}

Press Esc to exit the insert mode. Type :wq! and press Enter to save and exit the file.

Compile the test.c file into an executable file test.
```
gcc test.c -lksal -o test
```
Run the test executable file.
```
./test
```
The command output is as follows:
```
crc = 0x4ee4ecc1
```

Parent topic: KSAL Development Reference