[ C ] Serializzazione

[Andrea Simonassi]

Ciao,

read e write in C serializzano bene.

Ad esempio penserei ad una cosa del tipo

#include <stdio.h>
#include <io.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>

#define SERIALIZE_OR_DIE(fd, x) ( write(fd, &x, sizeof(x)) \
				==	sizeof(x) || close(fd) && exit(1))

#define UNSERIALIZE_OR_DIE(fd, x) (read(fd, &x, sizeof(x)) \
				== 	sizeof(x) || close(fd) && exit(1))

typedef struct _Type{
	char a[100];
	int b;
} Type;

int main()
{
	int fd;
	Type t, u;
	int n, o;

	strcpy(t.a, "test");

	t.b = 2;
	n = 3;

	fd = open("data",	O_BINARY | O_TRUNC | O_CREAT | O_RDWR , 
						S_IREAD | S_IWRITE );
	fd == -1 && exit(1);

	SERIALIZE_OR_DIE (fd, t);
	SERIALIZE_OR_DIE (fd, n);

	lseek(fd, 0L, SEEK_SET)  == 0 || exit(1);

	UNSERIALIZE_OR_DIE (fd, u);
	UNSERIALIZE_OR_DIE (fd, o);

	close(fd);

	printf("%s %d %d\n", u.a, u.b, o);
}