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Top Forums Programming Storing C++-struct in file - problem when adding new item in struct Post 302569813 by DreamWarrior on Tuesday 1st of November 2011 03:51:29 PM
Old 11-01-2011
Agreed with Corona, and I was going to make the same statement, but not seeing the rest of the code, and under the assumption it works, I figured maybe it was memory mapping the file to some fixed address location. That'd allow the pointer values to be stored and actually work so long as they only pointed to an address within the memory mapped region.

That said, I have no idea if the code is actually doing this. And, I must admit, for a properties file it's fetched.

As for the OP, I think you're generally misguided regarding what the code is doing. That struct is unlikely to be stored directly in the file. I'd dig a little deeper in the code and figure out what is reading and writing the file's data.

Better, why don't you just post what the file looks like; with that information we could probably immediately tell you whether or not that exact structure is stored verbatim in the file.
 

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BINTIME_ADD(9)						   BSD Kernel Developer's Manual					    BINTIME_ADD(9)

NAME
bintime_add -- operations on ``bintime'' SYNOPSIS
#include <sys/time.h> vid bintime_add(struct bintime *bt, const struct bintime *bt2); void bintime_addx(struct bintime *bt, uint64_t x); void bintime_sub(struct bintime *bt, const struct bintime *bt2); void bintime2timespec(const struct bintime *bt, struct timespec *ts); void timespec2bintime(const struct timespec *ts, struct bintime *bt); void bintime2timeval(const struct bintime *bt, struct timeval *tv); void timeval2bintime(const struct timeval *tv, struct bintime *bt); DESCRIPTION
These functions are provided for convenience as part of the machine-independent timecounter(9) framework. All of them operate with the bintime structure. The function bintime_add() adds the time information stored in bt2 to bt. Conversely, bintime_sub() subtracts bt2 from bt. The bintime_addx() function stores the fraction of a second x to bt. Like the function names bespeak, bintime2timespec() converts the bintime structure to struct timespec and timespec2bintime() does the oppo- site. The functions bintime2timeval() and timeval2bintime() operate with struct timeval instead. The result is stored to the right-hand side. SEE ALSO
timeradd(3), timeval(3), bintime(9), timecounter(9) BSD
June 8, 2010 BSD
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