Generate more possible random float values

Instead of only generating integers, generate any possible float representation, negatives, decimals, integers, NaNs, and Infs included. This is achieved by simply bitcasting a random `uXX` to a `fXX`.
Syndica · Aug 6, 2024 · 32c3aeb · 32c3aeb
1 parent 951c32f
commit 32c3aeb
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Showing 2 changed files with 10 additions and 10 deletions.
diff --git a/src/accountsdb/genesis_config.zig b/src/accountsdb/genesis_config.zig
@@ -84,7 +84,7 @@ pub const Rent = extern struct {
     pub fn random(rand: std.Random) Rent {
         return .{
             .lamports_per_byte_year = rand.int(u64),
-            .exemption_threshold = @floatFromInt(rand.int(u32)),
+            .exemption_threshold = @bitCast(rand.int(u64)),
             .burn_percent = rand.uintAtMost(u8, 100),
         };
     }
@@ -112,12 +112,12 @@ pub const Inflation = struct {
 
     pub fn random(rand: std.Random) Inflation {
         return .{
-            .initial = @floatFromInt(rand.int(u32)),
-            .terminal = @floatFromInt(rand.int(u32)),
-            .taper = @floatFromInt(rand.int(u32)),
-            .foundation = @floatFromInt(rand.int(u32)),
-            .foundation_term = @floatFromInt(rand.int(u32)),
-            .__unused = @floatFromInt(rand.int(u32)),
+            .initial = @bitCast(rand.int(u64)),
+            .terminal = @bitCast(rand.int(u64)),
+            .taper = @bitCast(rand.int(u64)),
+            .foundation = @bitCast(rand.int(u64)),
+            .foundation_term = @bitCast(rand.int(u64)),
+            .__unused = @bitCast(rand.int(u64)),
         };
     }
 };

diff --git a/src/accountsdb/snapshots.zig b/src/accountsdb/snapshots.zig
@@ -329,7 +329,7 @@ pub const Delegation = struct {
             .stake = rand.int(u64),
             .activation_epoch = rand.int(Epoch),
             .deactivation_epoch = rand.int(Epoch),
-            .warmup_cooldown_rate = @floatFromInt(rand.int(u32)),
+            .warmup_cooldown_rate = @bitCast(rand.int(u64)),
         };
     }
 };
@@ -345,7 +345,7 @@ pub const RentCollector = struct {
         return .{
             .epoch = rand.int(Epoch),
             .epoch_schedule = EpochSchedule.random(rand),
-            .slots_per_year = @floatFromInt(rand.int(u32)),
+            .slots_per_year = @bitCast(rand.int(u64)),
             .rent = Rent.random(rand),
         };
     }
@@ -870,7 +870,7 @@ pub const BankFields = struct {
             .ticks_per_slot = rand.int(u64),
             .ns_per_slot = rand.int(u128),
             .genesis_creation_time = rand.int(sig.accounts_db.genesis_config.UnixTimestamp),
-            .slots_per_year = @floatFromInt(rand.int(u32)),
+            .slots_per_year = @bitCast(rand.int(u64)),
             .accounts_data_len = rand.int(u64),
             .slot = rand.int(Slot),
             .epoch = rand.int(Epoch),