void __fill_random_buf(void *buf, unsigned int len, unsigned long seed)
{
- long *ptr = buf;
+ void *ptr = buf;
- while ((void *) ptr - buf < len) {
- *ptr = seed;
- ptr++;
+ while (len) {
+ int this_len;
+
+ if (len >= sizeof(int64_t)) {
+ *((int64_t *) ptr) = seed;
+ this_len = sizeof(int64_t);
+ } else if (len >= sizeof(int32_t)) {
+ *((int32_t *) ptr) = seed;
+ this_len = sizeof(int32_t);
+ } else if (len >= sizeof(int16_t)) {
+ *((int16_t *) ptr) = seed;
+ this_len = sizeof(int16_t);
+ } else {
+ *((int8_t *) ptr) = seed;
+ this_len = sizeof(int8_t);
+ }
+ ptr += this_len;
+ len -= this_len;
seed *= GOLDEN_RATIO_PRIME;
seed >>= 3;
}
}
}
-unsigned long fill_random_buf_percentage(struct frand_state *fs, void *buf,
- unsigned int percentage,
- unsigned int segment, unsigned int len,
- char *pattern, unsigned int pbytes)
+void __fill_random_buf_percentage(unsigned long seed, void *buf,
+ unsigned int percentage,
+ unsigned int segment, unsigned int len,
+ char *pattern, unsigned int pbytes)
{
- unsigned long r = __rand(fs);
unsigned int this_len;
if (percentage == 100) {
fill_pattern(buf, len, pattern, pbytes);
else
memset(buf, 0, len);
- return 0;
+ return;
}
if (segment > len)
segment = len;
- if (sizeof(int) != sizeof(long *))
- r *= (unsigned long) __rand(fs);
-
while (len) {
/*
* Fill random chunk
if (this_len > len)
this_len = len;
- __fill_random_buf(buf, this_len, r);
+ __fill_random_buf(buf, this_len, seed);
len -= this_len;
+ if (!len)
+ break;
buf += this_len;
if (this_len > len)
this_len = len;
+ else if (len - this_len <= sizeof(long))
+ this_len = len;
if (pbytes)
fill_pattern(buf, this_len, pattern, pbytes);
else
memset(buf, 0, this_len);
+
len -= this_len;
buf += this_len;
}
+}
+
+unsigned long fill_random_buf_percentage(struct frand_state *fs, void *buf,
+ unsigned int percentage,
+ unsigned int segment, unsigned int len,
+ char *pattern, unsigned int pbytes)
+{
+ unsigned long r = __rand(fs);
+
+ if (sizeof(int) != sizeof(long *))
+ r *= (unsigned long) __rand(fs);
+ __fill_random_buf_percentage(r, buf, percentage, segment, len,
+ pattern, pbytes);
return r;
}