From bf81e34921e3e30b05313efbcf5c9fa839cb7c05 Mon Sep 17 00:00:00 2001
From: Dominick Allen <djallen@librehumanitas.org>
Date: Sun, 22 Sep 2024 10:19:15 -0500
Subject: Initial commit.

---
 source/utf8_iterator.cpp | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 source/utf8_iterator.cpp

(limited to 'source/utf8_iterator.cpp')

diff --git a/source/utf8_iterator.cpp b/source/utf8_iterator.cpp
new file mode 100644
index 0000000..e439687
--- /dev/null
+++ b/source/utf8_iterator.cpp
@@ -0,0 +1,38 @@
+#include "utf8_iterator.hpp"
+
+namespace fud {
+
+std::optional<ExtUtf8> Utf8Iterator::peek() const
+{
+    if (m_index >= m_view.length()) {
+        return std::nullopt;
+    }
+
+    auto utf8 = ExtUtf8::fromStringView(m_view, m_index);
+
+    if (!utf8.valid()) {
+        return std::nullopt;
+    }
+
+    return utf8;
+}
+
+std::optional<ExtUtf8> Utf8Iterator::next()
+{
+    if (m_index >= m_view.length()) {
+        m_index = m_view.length();
+        return std::nullopt;
+    }
+
+    auto utf8 = ExtUtf8::fromStringView(m_view, m_index);
+
+    if (!utf8.valid()) {
+        m_index = m_view.length();
+        return std::nullopt;
+    }
+
+    m_index += utf8.size();
+    return utf8;
+}
+
+} // namespace fud
-- 
cgit v1.2.3