From 3fa199f451f6ad7eac1c93c5ce4817e8d028449a Mon Sep 17 00:00:00 2001
From: mricher <maximilien.richer@insa-rennes.fr>
Date: Wed, 24 Feb 2016 09:10:54 +0100
Subject: [PATCH] Squared sequency generation

---
 dfssp/contract/sequence.go | 44 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 dfssp/contract/sequence.go

diff --git a/dfssp/contract/sequence.go b/dfssp/contract/sequence.go
new file mode 100644
index 0000000..12e7229
--- /dev/null
+++ b/dfssp/contract/sequence.go
@@ -0,0 +1,44 @@
+package contract
+
+import (
+	"dfss/dfssp/entities"
+)
+
+// GenerateSignSequence for the contract signature
+//
+// The generated sequence is an array of integers refering to the User array.
+func GenerateSignSequence(users []entities.User) []int {
+
+	return squaredSignEngine(len(users))
+}
+
+// squaredSignEngine is a basic ^2 engine for sequence generation
+func squaredSignEngine(n int) []int {
+	sequence := make([]int, n*n)
+
+	for i := 0; i < n; i++ {
+		for k := 0; k < n; k++ {
+			sequence[i*n+k] = k
+		}
+	}
+
+	return sequence
+}
+
+// squaredSignEngineSlice is the same as the above with slicing
+func squaredSignEngineSlice(n int) []int {
+	baseSequence := make([]int, n)
+
+	// populate base slice
+	for i := 0; i < n; i++ {
+		baseSequence[i] = i
+	}
+
+	sequence := make([]int, 0, n*n)
+	// append n-1 time the slice to itself
+	for i := 0; i < n; i++ {
+		sequence = append(sequence, baseSequence...)
+	}
+
+	return sequence
+}
-- 
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