31 lines
583 B
C
31 lines
583 B
C
#include <stdlib.h>
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#include <arpa/inet.h>
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#include "macrompatcher.h"
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RomErr GetChecksum(RomCtx *rom, uint32_t *checksum) {
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uint8_t *tmpptr = NULL;
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size_t i;
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if(!rom || !rom->data || !checksum) return eParmErr;
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tmpptr = rom->data+4;
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*checksum = 0;
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for(i = 0; i < rom->filesize; i++) {
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*checksum += tmpptr[i++] << 8;
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*checksum += tmpptr[i];
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}
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return eSuccess;
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}
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RomErr UpdateChecksum(RomCtx *rom) {
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uint32_t checksum;
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RomErr ret;
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ret = GetChecksum(rom, &checksum);
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if(ret != eSuccess) return ret;
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*(uint32_t*)(rom->data) = htonl(checksum);
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return eSuccess;
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}
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