Initial commit.

1 files changed, 38 insertions, 0 deletions

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