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use smaller integers for random cache state

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This commit is contained in:
Daniel Micay 2018-11-04 14:23:12 -05:00
parent 1fed72a9c3
commit 943a81fbeb
2 changed files with 6 additions and 6 deletions
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4
random.c
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@ -56,7 +56,7 @@ static void refill(struct random_state *state) {
u16 get_random_u16(struct random_state *state) { u16 get_random_u16(struct random_state *state) {
u16 value; u16 value;
size_t remaining = RANDOM_CACHE_SIZE - state->index; unsigned remaining = RANDOM_CACHE_SIZE - state->index;
if (remaining < sizeof(value)) { if (remaining < sizeof(value)) {
refill(state); refill(state);
} }
@ -83,7 +83,7 @@ u16 get_random_u16_uniform(struct random_state *state, u16 bound) {
u64 get_random_u64(struct random_state *state) { u64 get_random_u64(struct random_state *state) {
u64 value; u64 value;
size_t remaining = RANDOM_CACHE_SIZE - state->index; unsigned remaining = RANDOM_CACHE_SIZE - state->index;
if (remaining < sizeof(value)) { if (remaining < sizeof(value)) {
refill(state); refill(state);
} }

8
random.h
View File

@ -4,12 +4,12 @@
#include "chacha.h" #include "chacha.h"
#include "util.h" #include "util.h"
#define RANDOM_CACHE_SIZE 256ULL #define RANDOM_CACHE_SIZE 256U
#define RANDOM_RESEED_SIZE 256ULL * 1024 #define RANDOM_RESEED_SIZE (256U * 1024)
struct random_state { struct random_state {
size_t index; unsigned index;
size_t reseed; unsigned reseed;
chacha_ctx ctx; chacha_ctx ctx;
u8 cache[RANDOM_CACHE_SIZE]; u8 cache[RANDOM_CACHE_SIZE];
}; };