/* $Header: /pjproject-0.3/pjlib/src/pj/guid_simple.c 3 10/14/05 12:26a Bennylp $ */ | |
/* $Log: /pjproject-0.3/pjlib/src/pj/guid_simple.c $ | |
* | |
* 3 10/14/05 12:26a Bennylp | |
* Finished error code framework, some fixes in ioqueue, etc. Pretty | |
* major. | |
* | |
* 2 9/17/05 10:37a Bennylp | |
* Major reorganization towards version 0.3. | |
* | |
*/ | |
#include <pj/guid.h> | |
#include <pj/os.h> | |
#include <pj/rand.h> | |
#include <pj/string.h> | |
#include <pj/compat/sprintf.h> | |
const unsigned PJ_GUID_STRING_LENGTH=20; | |
static void init_mac_address(unsigned char mac_addr[16]) | |
{ | |
unsigned long *ulval1 = (unsigned long*) &mac_addr[0]; | |
unsigned short *usval1 = (unsigned short*) &mac_addr[4]; | |
*ulval1 = pj_rand(); | |
*usval1 = (unsigned short) pj_rand(); | |
} | |
PJ_DEF(pj_str_t*) pj_generate_unique_string(pj_str_t *str) | |
{ | |
static int guid_initialized; | |
static unsigned pid; | |
static char str_pid[5]; | |
static unsigned char mac_addr[6]; | |
static char str_mac_addr[16]; | |
static unsigned clock_seq; | |
PJ_CHECK_STACK(); | |
if (guid_initialized == 0) { | |
pid = pj_getpid(); | |
init_mac_address(mac_addr); | |
clock_seq = 0; | |
sprintf(str_pid, "%04x", pid); | |
sprintf(str_mac_addr, "%02x%02x%02x%02x%02x%02x", | |
mac_addr[0], mac_addr[1], mac_addr[2], | |
mac_addr[3], mac_addr[4], mac_addr[5]); | |
guid_initialized = 1; | |
} | |
strcpy(str->ptr, str_pid); | |
sprintf(str->ptr+4, "%04x", clock_seq++); | |
pj_memcpy(str->ptr+8, str_mac_addr, 12); | |
str->slen = 20; | |
return str; | |
} | |