Posted on 2013-07-23 16:42
Milo的海域 閱讀(3310)
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C
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <inttypes.h>
uint64_t htonll(uint64_t val) {
return (((uint64_t) htonl(val)) << 32) + htonl(val >> 32);
}
uint64_t ntohll(uint64_t val) {
return (((uint64_t) ntohl(val)) << 32) + ntohl(val >> 32);
}
int main() {
uint64_t hll = 0x1122334455667788;
printf("uint64: %"PRIu64"\n", hll);
printf("0x%"PRIX64"\n", hll);
printf("htonll(hll) = 0x%"PRIX64"\n", htonll(hll));
printf("ntohll(htonll(hll)) = 0x%"PRIX64"\n", ntohll(htonll(hll)));
printf("ntohll(hll) = 0x%"PRIX64"\n", ntohll(hll)); // no change
return 1;
}
big endian(network byte order), little endian (host byte order in intel arch)