From ab08fa6065b5b08627b51203eb92ef65ed7b5ea2 Mon Sep 17 00:00:00 2001
From: hachem <im@hachem.wtf>
Date: Sun, 6 Sep 2026 18:53:29 +0200
Subject: c: quantum gate and state foundations

---
 src/maths/matrix.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/maths/matrix.c')

diff --git a/src/maths/matrix.c b/src/maths/matrix.c
index 400c2a7..44b953c 100644
--- a/src/maths/matrix.c
+++ b/src/maths/matrix.c
@@ -30,6 +30,15 @@ struct PsiMatrix psi_clone_matrix(struct PsiMatrix m)
 	return psi_new_matrix_from(m.data, m.rows, m.cols);
 }
 
+struct PsiMatrix psi_identity_matrix(size_t size)
+{
+	struct PsiMatrix m = psi_new_matrix(size, size);
+	for (size_t i = 0; i < size; i++)
+		m.data[i * size + i] = psi_new_complex(1.0, 0.0);
+
+	return m;
+}
+
 void psi_free_matrix(struct PsiMatrix *m)
 {
 	free(m->data);
-- 
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