65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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unsigned char magic[7] = "B000FF\n";
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#define READ(buf, len) \
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if (!fread(buf, len, 1, f)) \
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err(1, "read error");
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int main(int argc, char *argv[]) {
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FILE *f;
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unsigned char marker[7];
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unsigned int i32, addr, cksum, len, i;
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int n, ch, c;
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if (argc != 2) {
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fprintf(stderr, "usage: nk-dump filename\n");
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return 1;
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}
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if ((f = fopen(argv[1], "rb")) == NULL)
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err(1, "can't open %s", argv[1]);
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READ(marker, sizeof(marker));
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if (memcmp(magic, marker, sizeof(magic)))
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errx(1, "signature does not match");
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READ(&i32, sizeof(i32));
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printf("addr %08x\n", i32);
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READ(&i32, sizeof(i32));
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printf("length %08x\n", i32);
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n = 0;
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while (!feof(f)) {
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READ(&addr, sizeof(addr));
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READ(&len, sizeof(len));
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READ(&cksum, sizeof(cksum));
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printf("image %u\n", n);
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c = 0;
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for (i = 0; i < len; i++) {
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ch = getc(f);
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c += ch;
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}
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printf(" addr %08x\n", addr);
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printf(" len %08x\n", len);
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printf(" cksum %08x", cksum);
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if (cksum == c) {
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printf(" [ok]\n");
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} else {
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printf(" != calculated cksum %08x\n", c);
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}
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n++;
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}
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fclose(f);
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return 0;
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}
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/* vim:set ts=2 sw=2: */
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