uuid.c

linux下自动mount各种即插即用设备的一个小程序源码 文件包含内容： /vold.h /vold.c /split.h /split.c /disktype-6/disktype.c

/* *************************
UNUSED NOW
*******************************/

#include "uuid.h"

int uuid_get(void* buf, UUID* uuid) {
	U8* from = buf;
	char string[37];
	int i, c, variant, version;

	memset(string, 0, 37);

	uuid->uuid = 0;
	uuid->type = NULL;
	uuid->version = 0;

	if (memcmp(buf, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) == 0) {
		uuid->string = "nil";
		return -1;
	}

	variant = from[8] >> 5;
	version = from[6] >> 4;

	for (i = 0; i < 16; i++) {
		c = *from++;
		*string++ = "0123456789ABCDEF"[c >> 4];
		*string++ = "0123456789ABCDEF"[c & 15];
		if (i == 3 || i == 5 || i == 7 || i == 9)
			*string++ = '-';
	}

	if ((variant & 4) == 0) {         /* 0 x x */
		uuid->type = "NCS";
	} else if ((variant & 2) == 0) {  /* 1 0 x */
		uuid->type = "DCE";
		uuid->version = version;
	} else if ((variant & 1) == 0) {  /* 1 1 0 */
		uuid->type = "MS GUID";
	} else {                          /* 1 1 1 */
		uuid->type = "(Reserved)";
	}

	memcpy(uuid->uuid, buf, 16);
	uuid->string = strdup(string);

	return 0;
}