static void fill_buff(SgBTreeNode *n, SgChar *buff, SgSize vl, SgSize hl, SgSize ml, SgSize ls)
{
SgSize s;
if (n == LAST)
return;
s = 2 << (ml - hl - 1);
buff[hl*ls+s/2-1+s*vl] = '.';
fill_buff(n->left, buff, vl << 1, hl + 1, ml, ls);
fill_buff(n->right, buff, (vl << 1) + 1, hl + 1, ml, ls);
}
static SRP_Result init_random()
{
if (g_initialized) return SRP_OK;
SRP_Result ret = fill_buff();
g_initialized = (ret == SRP_OK);
return ret;
}
static SRP_Result mpz_fill_random(mpz_t num)
{
// was call: BN_rand(num, 256, -1, 0);
if (RAND_BUFF_MAX - g_rand_idx < 32)
if (fill_buff() != SRP_OK) return SRP_ERR;
mpz_from_bin((const unsigned char *)(&g_rand_buff[g_rand_idx]), 32, num);
g_rand_idx += 32;
return SRP_OK;
}
// clang-format off
SRP_Result srp_create_salted_verification_key( SRP_HashAlgorithm alg,
SRP_NGType ng_type, const char *username_for_verifier,
const unsigned char *password, size_t len_password,
unsigned char **bytes_s, size_t *len_s,
unsigned char **bytes_v, size_t *len_v,
const char *n_hex, const char *g_hex )
{
SRP_Result ret = SRP_OK;
mpz_t v; mpz_init(v);
mpz_t x; mpz_init(x);
// clang-format on
NGConstant *ng = new_ng(ng_type, n_hex, g_hex);
if (!ng) goto error_and_exit;
if (init_random() != SRP_OK) /* Only happens once */
goto error_and_exit;
if (*bytes_s == NULL) {
size_t size_to_fill = 16;
*len_s = size_to_fill;
if (RAND_BUFF_MAX - g_rand_idx < size_to_fill)
if (fill_buff() != SRP_OK) goto error_and_exit;
*bytes_s = (unsigned char *)srp_alloc(size_to_fill);
if (!*bytes_s) goto error_and_exit;
memcpy(*bytes_s, g_rand_buff + g_rand_idx, size_to_fill);
g_rand_idx += size_to_fill;
}
if (!calculate_x(
x, alg, *bytes_s, *len_s, username_for_verifier, password, len_password))
goto error_and_exit;
srp_dbg_num(x, "Server calculated x: ");
mpz_powm(v, ng->g, x, ng->N);
*len_v = mpz_num_bytes(v);
*bytes_v = (unsigned char *)srp_alloc(*len_v);
if (!*bytes_v) goto error_and_exit;
mpz_to_bin(v, *bytes_v);
cleanup_and_exit:
delete_ng(ng);
mpz_clear(v);
mpz_clear(x);
return ret;
error_and_exit:
ret = SRP_ERR;
goto cleanup_and_exit;
}
//initializes audio buffer
int initAudio(char* fname) {
alt_up_sd_card_dev *device_reference = NULL;
device_reference = alt_up_sd_card_open_dev(SD_CARD_NAME);
open_sd();
av_config_setup();
init_audio_buff(ab);
ab->audio = alt_up_audio_open_dev(AUDIO_0_NAME);
alt_up_audio_reset_audio_core(ab->audio);
file_handle = alt_up_sd_card_fopen(fname, 0);
offset(file_handle, ab);
fill_buff(file_handle, ab);
return file_handle;
}
void sg_display_btree(SgBTreeNode *n)
{
SgSize ml, ls, i, j;
SgChar *buff;
if (n == LAST)
return;
ml = n->mlevel;
ls = (2 << ml) / 2;
buff = sg_alloc(ls * ml);
for (i = 0; i < ml; i++) {
for (j = 0; j < (ls - 1); j++) {
buff[i*ls+j] = ' ';
}
buff[i*ls+j] = 0;
}
fill_buff(n, buff, 0, 0, ml, ls);
for (; ml;) {
printf("%s\n", &buff[--ml*ls]);
}
sg_free(buff);
}
static int count_time_internal (struct mp3_data *data)
{
struct xing xing;
unsigned long bitrate = 0;
int has_xing = 0;
int is_vbr = 0;
int num_frames = 0;
mad_timer_t duration = mad_timer_zero;
struct mad_header header;
int good_header = 0; /* Have we decoded any header? */
mad_header_init (&header);
xing_init (&xing);
/* There are three ways of calculating the length of an mp3:
1) Constant bitrate: One frame can provide the information
needed: # of frames and duration. Just see how long it
is and do the division.
2) Variable bitrate: Xing tag. It provides the number of
frames. Each frame has the same number of samples, so
just use that.
3) All: Count up the frames and duration of each frames
by decoding each one. We do this if we've no other
choice, i.e. if it's a VBR file with no Xing tag.
*/
while (1) {
/* Fill the input buffer if needed */
if (data->stream.buffer == NULL ||
data->stream.error == MAD_ERROR_BUFLEN) {
if (!fill_buff(data))
break;
}
if (mad_header_decode(&header, &data->stream) == -1) {
if (MAD_RECOVERABLE(data->stream.error))
continue;
else if (data->stream.error == MAD_ERROR_BUFLEN)
continue;
else {
debug ("Can't decode header: %s",
mad_stream_errorstr(
&data->stream));
break;
}
}
good_header = 1;
/* Limit xing testing to the first frame header */
if (!num_frames++) {
if (xing_parse(&xing, data->stream.anc_ptr,
data->stream.anc_bitlen)
!= -1) {
is_vbr = 1;
debug ("Has XING header");
if (xing.flags & XING_FRAMES) {
has_xing = 1;
num_frames = xing.frames;
break;
}
debug ("XING header doesn't contain number of "
"frames.");
}
}
/* Test the first n frames to see if this is a VBR file */
if (!is_vbr && !(num_frames > 20)) {
if (bitrate && header.bitrate != bitrate) {
debug ("Detected VBR after %d frames",
num_frames);
is_vbr = 1;
}
else
bitrate = header.bitrate;
}
/* We have to assume it's not a VBR file if it hasn't already
* been marked as one and we've checked n frames for different
* bitrates */
else if (!is_vbr) {
debug ("Fixed rate MP3");
break;
}
mad_timer_add (&duration, header.duration);
}
if (!good_header)
return -1;
if (!is_vbr) {
/* time in seconds */
double time = (data->size * 8.0) / (header.bitrate);
double timefrac = (double)time - ((long)(time));
/* samples per frame */
long nsamples = 32 * MAD_NSBSAMPLES(&header);
/* samplerate is a constant */
num_frames = (long) (time * header.samplerate / nsamples);
/* the average bitrate is the constant bitrate */
data->avg_bitrate = bitrate;
mad_timer_set(&duration, (long)time, (long)(timefrac*100),
100);
}
else if (has_xing) {
mad_timer_multiply (&header.duration, num_frames);
duration = header.duration;
}
else {
/* the durations have been added up, and the number of frames
counted. We do nothing here. */
debug ("Counted duration by counting frames durations in "
"VBR file.");
}
if (data->avg_bitrate == -1
&& mad_timer_count(duration, MAD_UNITS_SECONDS) > 0) {
data->avg_bitrate = data->size
/ mad_timer_count(duration, MAD_UNITS_SECONDS) * 8;
}
mad_header_finish(&header);
debug ("MP3 time: %ld", mad_timer_count (duration, MAD_UNITS_SECONDS));
return mad_timer_count (duration, MAD_UNITS_SECONDS);
}
int main(int argc, char *argv[])
{
int listenfd, connfd, port, clientlen, numworkers;
char *sched;
struct sockaddr_in clientaddr;
struct stat sbuf;
pthread_mutex_init(&m, NULL); // lock for producer and consumer loops
pthread_cond_init(&empty, NULL); // CV for master/producer to wait on
pthread_cond_init(&fill, NULL); // CV for workers/consumers to wait on
getargs(&port, &numworkers, &bufsize, &sched, argc, argv);
//
// CS537: Create some threads...
//
pthread_t threads[numworkers]; // array of worker threads
int i;
for (i = 0; i < numworkers; i++) {
pthread_create(&threads[i], NULL, consumer, NULL);
}
listenfd = Open_listenfd(port);
while (1) {
clientlen = sizeof(clientaddr);
connfd = Accept(listenfd, (SA *)&clientaddr, (socklen_t *) &clientlen);
pthread_mutex_lock(&m);
buff_t* newNode = malloc(sizeof(buff_t));
newNode->fd = connfd;
Rio_readinitb(&((*newNode).rio), newNode->fd);
Rio_readlineb(&((*newNode).rio), newNode->buf, MAXLINE);
sscanf(newNode->buf, "%s %s %s", newNode->method, newNode->uri, newNode->version);
requestReadhdrs(&((*newNode).rio));
newNode->is_static = requestParseURI(newNode->uri, newNode->filename, newNode->cgiargs);
stat(newNode->filename, &sbuf);
newNode->filesize = sbuf.st_size;
newNode->filenamesize = strlen(newNode->filename);
//newNode->cgiargs = cgiargs;
while(numrequests == bufsize) {
pthread_cond_wait(&empty, &m);
}
if (strcmp(sched, "FIFO") == 0) {
fill_buff(newNode);
} else if (strcmp(sched, "SFNF") == 0) {
fill_buff2(newNode);
} else if (strcmp(sched, "SFF") == 0) {
fill_buff3(newNode);
}
pthread_cond_signal(&fill);
pthread_mutex_unlock(&m);
//fprintf(stderr, "numrequests: %d\n", numrequests);
//
// CS537: In general, don't handle the request in the main thread.
// Save the relevant info in a buffer and have one of the worker threads
// do the work. However, for SFF, you may have to do a little work
// here (e.g., a stat() on the filename) ...
//
//requestHandle(connfd);
//Close(connfd);
}
}