Audiovox P965 Datenblatt PDF herunterladen (Seite 212)

API in C

209

#define T63 0x2ad7d2bb

#define T64 /* 0xeb86d391 */ (T_MASK ^ 0x14792c6e)

static void

md5_process(md5_state_t *pms, const md5_byte_t *data /*[64]*/)

{

md5_word_t

a = pms->abcd[0], b = pms->abcd[1],

c = pms->abcd[2], d = pms->abcd[3];

md5_word_t t;

#if BYTE_ORDER > 0

/* Define storage only for big-endian CPUs. */

md5_word_t X[16];

#else

/* Define storage for little-endian or both types of CPUs. */

md5_word_t xbuf[16];

const md5_word_t *X;

#endif

{

#if BYTE_ORDER == 0

* Determine dynamically whether this is a big-endian or

* little-endian machine, since we can use a more efficient

* algorithm on the latter.

static const int w = 1;

if (*((const md5_byte_t *)&w)) /* dynamic little-endian */

#endif

#if BYTE_ORDER <= 0 /* little-endian */

{

* On little-endian machines, we can process properly aligned

* data without copying it.

if (!((data - (const md5_byte_t *)0) & 3)) {

/* data are properly aligned */

X = (const md5_word_t *)data;

} else {

/* not aligned */

memcpy(xbuf, data, 64);

X = xbuf;

}

#endif

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Audiovox P965 Datenblatt Seite 212