From 95fe38699b2ab8caaf677978443e9f2836e829db Mon Sep 17 00:00:00 2001
From: bel <bel@bel.bel>
Date: Sun, 16 Jul 2023 13:58:58 -0600
Subject: [PATCH] define src.game.maze.Spec and .Seed

---
 src/game/maze/spec.go      | 21 +++++++++++++++++++++
 src/game/maze/spec_test.go | 18 ++++++++++++++++++
 src/game/maze/speed.go     | 19 +++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 src/game/maze/spec.go
 create mode 100644 src/game/maze/spec_test.go
 create mode 100644 src/game/maze/speed.go

diff --git a/src/game/maze/spec.go b/src/game/maze/spec.go
new file mode 100644
index 0000000..6210cb4
--- /dev/null
+++ b/src/game/maze/spec.go
@@ -0,0 +1,21 @@
+package maze
+
+type Spec struct {
+	Size struct {
+		W uint16
+		H uint16
+	}
+	Seed uint32
+}
+
+func NewSpec(w, h uint16) Spec {
+	return NewSpecWithSeed(w, h, NewSeed())
+}
+
+func NewSpecWithSeed(w, h uint16, seed uint32) Spec {
+	result := Spec{}
+	result.Size.W = w
+	result.Size.H = h
+	result.Seed = seed
+	return result
+}
diff --git a/src/game/maze/spec_test.go b/src/game/maze/spec_test.go
new file mode 100644
index 0000000..a339c13
--- /dev/null
+++ b/src/game/maze/spec_test.go
@@ -0,0 +1,18 @@
+package maze_test
+
+import (
+	"testing"
+
+	"gogs.inhome.blapointe.com/imicromouse/src/game/maze"
+)
+
+func TestNewSpec(t *testing.T) {
+	spec := maze.NewSpec(8, 6)
+	if got := spec.Size.W; got != 8 {
+		t.Error(got)
+	} else if got := spec.Size.H; got != 6 {
+		t.Error(got)
+	} else if got := spec.Seed; got == 0 {
+		t.Error(got)
+	}
+}
diff --git a/src/game/maze/speed.go b/src/game/maze/speed.go
new file mode 100644
index 0000000..db5f37c
--- /dev/null
+++ b/src/game/maze/speed.go
@@ -0,0 +1,19 @@
+package maze
+
+import (
+	"fmt"
+	"hash/crc32"
+	"time"
+)
+
+func NewSeed() uint32 {
+	return NewSeedAt(time.Now())
+}
+
+func NewSeedAt(t time.Time) uint32 {
+	n := t.UnixNano() / int64(time.Millisecond)
+	b := fmt.Sprintf("%b", n)
+	hash := crc32.NewIEEE()
+	hash.Write([]byte(b))
+	return hash.Sum32()
+}