void generate_random_page(char *page)
{
unsigned int i;
switch (rand() % 6) {
/* return a page of complete trash */
case 0: /* bytes */
for (i = 0; i < page_size; )
page[i++] = (unsigned char)rand();
return;
case 1: /* words */
for (i = 0; i < (page_size / 2); ) {
page[i++] = 0;
page[i++] = (unsigned char)rand();
}
return;
case 2: /* ints */
for (i = 0; i < (page_size / 4); ) {
page[i++] = 0;
page[i++] = 0;
page[i++] = 0;
page[i++] = (unsigned char)rand();
}
return;
/* return a page that looks kinda like a struct */
case 3: fabricate_onepage_struct(page);
return;
/* return a page of unicode nonsense. */
case 4: gen_unicode_page(page);
return;
/* page of 0's and 1's. */
case 5:
for (i = 0; i < page_size; )
page[i++] = (unsigned char)rand() % 2;
return;
default:
BUG("unreachable!\n");
return;
}
}
static void generate_random_page(char *page)
{
unsigned int i;
unsigned int p = 0;
switch (rand() % 8) {
case 0:
memset(page, 0, page_size);
return;
case 1:
memset(page, 0xff, page_size);
return;
case 2:
memset(page, rand() % 0xff, page_size);
return;
case 3:
for (i = 0; i < page_size; )
page[i++] = (unsigned char)rand();
return;
case 4:
for (i = 0; i < page_size; )
page[i++] = (unsigned char)rand_bool();
return;
/* return a page that looks kinda like a struct */
case 5: fabricate_onepage_struct(page);
return;
/* page full of format strings. */
case 6:
for (i = 0; i < page_size; i += 2) {
page[i] = '%';
switch (rand_bool()) {
case 0: page[i + 1] = 'd';
break;
case 1: page[i + 1] = 's';
break;
}
}
page_size = getpagesize(); // Hack for clang 3.3 false positive.
page[rand() % page_size] = 0;
return;
/* ascii representation of a random number */
case 7:
switch (rand() % 3) {
case 0:
switch (rand() % 3) {
case 0: p = sprintf(page, "%lu", (unsigned long) rand64());
break;
case 1: p = sprintf(page, "%ld", (unsigned long) rand64());
break;
case 2: p = sprintf(page, "%lx", (unsigned long) rand64());
break;
}
break;
case 1:
switch (rand() % 3) {
case 0: p = sprintf(page, "%u", (unsigned int) rand32());
break;
case 1: p = sprintf(page, "%d", (int) rand32());
break;
case 2: p = sprintf(page, "%x", (int) rand32());
break;
}
break;
case 2:
switch (rand() % 3) {
case 0: p = sprintf(page, "%u", (unsigned char) rand());
break;
case 1: p = sprintf(page, "%d", (char) rand());
break;
case 2: p = sprintf(page, "%x", (char) rand());
break;
}
break;
}
page[p] = 0;
break;
}
}
