code explaination

Hi can anyone tell me the basics of what this code is doing? I know it is writing to eeprom but is it writing a byte at a time and incrimenting the address?

EECSN is the eeprom pin.

#define EE_WRSR     0x01
#define EE_WRITE    0x02
#define EE_READ     0x03
#define EE_WRDI     0x04
#define EE_RDSR     0x05
#define EE_WREN     0x06

void EEWrite(unsigned int addr, unsigned char b)
{
    while((EEStatus() & 0x01) != 0x00)      // Wait if busy
        ;
    EECSN = 0;
    SPI_ReadWrite(EE_WREN);
    EECSN = 1;
    EECSN = 0;
    SPI_ReadWrite(EE_WRITE);
    SPI_ReadWrite(addr >> 8);
    SPI_ReadWrite(addr & 0xff);
    SPI_ReadWrite(b);
    EECSN = 1;

}

thank you all.