FreeCalypso > hg > freecalypso-reveng
annotate miscprog/pircksum.c @ 217:7d7a4367ec28
leo-obj: disasm hints created for l1audio_cust.obj
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 14 Mar 2017 06:19:52 +0000 |
parents | bf4286245c74 |
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rev | line source |
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Pirelli's RF calibration cracked
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /* |
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Pirelli's RF calibration cracked
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2 * This program has been used to verify and refine my understanding of the |
bf4286245c74
Pirelli's RF calibration cracked
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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3 * checksum scheme used for Pirelli's RF calibration data. |
bf4286245c74
Pirelli's RF calibration cracked
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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4 */ |
bf4286245c74
Pirelli's RF calibration cracked
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5 |
bf4286245c74
Pirelli's RF calibration cracked
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6 #include <sys/types.h> |
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7 #include <stdio.h> |
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Pirelli's RF calibration cracked
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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8 #include <stdlib.h> |
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9 |
bf4286245c74
Pirelli's RF calibration cracked
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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10 main(argc, argv) |
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Pirelli's RF calibration cracked
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11 char **argv; |
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Pirelli's RF calibration cracked
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12 { |
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13 FILE *f; |
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14 u_long offset, len; |
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15 u_char inb, accum; |
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Pirelli's RF calibration cracked
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16 |
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17 if (argc != 4) { |
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18 fprintf(stderr, "usage: %s fact.bin offset len\n", argv[0]); |
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19 exit(1); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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20 } |
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21 f = fopen(argv[1], "r"); |
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22 if (!f) { |
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23 perror(argv[1]); |
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24 exit(1); |
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25 } |
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26 offset = strtoul(argv[2], 0, 16); |
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27 len = strtoul(argv[3], 0, 16); |
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28 fseek(f, offset, SEEK_SET); |
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29 for (accum = 0; len; len--) { |
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30 inb = getc(f); |
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31 accum += inb; |
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32 } |
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33 inb = getc(f); |
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34 printf("Computed cksum %02X, following byte %02X\n", accum, inb); |
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35 exit(0); |
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36 } |