bootloaderShared.c

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#include "bootloaderShared.h"
#include <string.h>

#define BOOTLOADER_HASH_MIXER 0x5bd1e995
#define BOOTLOADER_HASH_SHIFTER 24

// calculate bootloader hash code over a set of data
uint32_t calculateBootloaderHashCode(uint32_t hashCode, const uint32_t* start, const uint32_t* end)
{
        uint32_t value;
        while (start < end)
        {
                value = *start++;
                value *= BOOTLOADER_HASH_MIXER;
                value ^= value >> BOOTLOADER_HASH_SHIFTER;
                value *= BOOTLOADER_HASH_MIXER;
                hashCode *= BOOTLOADER_HASH_MIXER;
                hashCode ^= value;
        }
        return hashCode;
}