Hi,
I need to extract info from a .gzb file. I have read the description
of gzbuilder's output file format. I tried doing a simple extraction
of the version number, which to my understanding should be the first
4 bytes in the file. I used code like this:
gzb_extract(const char *filename) {
FILE *input;
size_t n;
float data;
input = fopen(filename, "rb");
if (input == NULL) {
perror("gzb_extract(): couldn't open input file");
return -1;
}
n = fread(&data, 1, 4, input);
if (n != 0) {
data = (float) ntohl((uint32_t) data); // convert to host
byte order
data /= 1000; // take out numerical constant
printf("version number: %s\n", data);
}
fclose(input);
}
However, the printed results don't seem to make sense. And a hex
dump of the gzb file doesn't seem to match what my program is showing
when I print out those first 4 bytes in hexadecimal.
If anyone can offer some insight or perhaps tell me if there is a
flaw in the way I am trying to extract the info it would be much
appreciated. Thanks!
-Dustin-
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