BITS *
bits_load (const char *buffer)
{
int
block_nbr; /* Bitstring block number */
word
comp_size; /* Size of compressed block */
BITBLOCK
*block_ptr; /* Points to bitstring block */
BITS
*bits;
byte
*buf,
*position; /* Current position in the stream */
buf = (byte *) mem_strdup (buffer);
if (buf == NULL)
return (NULL);
bits = bits_create (); /* Create a new, empty bitmap */
decode_base64 (buffer, buf, strlen ((char *) buf) + 1);
position = (byte *) buf;
/* Read bitstring header from buffer */
bits-> block_count = *((int *) position);
position += sizeof (bits-> block_count);
bits-> free_list = *((dbyte *) position);
position += sizeof (bits-> free_list);
/* Read bitstring blocks from file */
for (block_nbr = 0; block_nbr < bits-> block_count; block_nbr++)
{
block_nbr = alloc_block (bits, block_nbr);
if (block_nbr < 0)
{
bits_destroy (bits);
return (NULL);
}
block_ptr = bits-> block [block_nbr];
block_ptr-> right = *((dbyte *)position);
position += sizeof (block_ptr-> right);
block_ptr-> size = *((int *)position);
position += sizeof (block_ptr-> size);
comp_size = *((word *)position);
position += sizeof (word);
memcpy (compressed, position, comp_size);
position += comp_size;
expand_block (compressed, block_ptr-> block.data, comp_size);
}
mem_free (buf);
return (bits);
}
int main(int argc, char *argv[])
{
long id;
char name[NAME_LEN];
char rasdial[RAS_LEN];
memset(name,'\0',NAME_LEN);
memset(rasdial,'\0',RAS_LEN);
Bits bits;
int ret = bits_init(&bits,LEN);
if(-1 == ret){
fprintf(stderr,"bits_init error %s %d\n",__FILE__,__LINE__);
}
FILE *save;
save = fopen("random_save.txt","a+");
if(NULL == save){
fprintf(stderr,"open random_save.text failed\n");
exit(1);
}
long times=0;
long count=0;
srand((int)time(0));
do{
id = rand();
id = ((id<<4) + rand()) % LEN;
if(!bits_get(&bits,id))
{
bits_set(&bits,id);
}
else
{
printf("Repeat times %ld\n",++count);
continue;
}
if (LEN-1 == times){
printf("Have try all size=%ld\n",times);
goto EXIT;
}
sprintf(name,"TYT010%03ld",id);
sprintf(rasdial,"rasdial pppoe %s 8888\n",name);
printf("times=%ld %s",++times,rasdial);
ret = system(rasdial);
}while(0 != ret);
EXIT:
bits_destroy(&bits);
fprintf(save,"times=%ld %s",times,rasdial);
printf("Final Rpeat times %ld\n",count);
return 0;
}
BITS *
bits_fget (FILE *file)
{
int
block_nbr; /* Bitstring block number */
word
comp_size = 0; /* Size of compressed block */
BITBLOCK
*block_ptr; /* Points to bitstring block */
BITS
*bits;
ASSERT (file);
bits = bits_create (); /* Create a new, empty bitmap */
/* Read bitstring header from file */
ASSERT (fread (&bits-> block_count, sizeof (bits-> block_count), 1, file) == 1);
ASSERT (fread (&bits-> free_list, sizeof (bits-> free_list), 1, file) == 1);
/* Read bitstring blocks from file */
for (block_nbr = 0; block_nbr < bits-> block_count; block_nbr++)
{
block_nbr = alloc_block (bits, block_nbr);
if (block_nbr < 0)
{
bits_destroy (bits);
return (NULL);
}
block_ptr = bits-> block [block_nbr];
ASSERT (fread (&block_ptr-> right, sizeof (block_ptr-> right), 1, file) == 1);
ASSERT (fread (&block_ptr-> size, sizeof (block_ptr-> size), 1, file) == 1);
ASSERT (fread (&comp_size, sizeof (comp_size), 1, file) == 1);
ASSERT (fread (compressed, comp_size, 1, file) == 1);
expand_block (compressed, block_ptr-> block.data, comp_size);
}
return (bits);
}
