Initial commit

1 files changed, 109 insertions, 0 deletions

diff --git a/src/buffer.hh b/src/buffer.hh
new file mode 100644
index 00000000..7564e444
--- /dev/null
+++ b/src/buffer.hh
@@ -0,0 +1,109 @@
+#ifndef buffer_hh_INCLUDED
+#define buffer_hh_INCLUDED
+
+#include <string>
+#include <vector>
+
+namespace Kakoune
+{
+
+class Buffer;
+typedef int      BufferPos;
+typedef int      BufferSize;
+typedef char     BufferChar;
+typedef std::basic_string<BufferChar> BufferString;
+
+struct LineAndColumn
+{
+    BufferPos line;
+    BufferPos column;
+
+    LineAndColumn(BufferPos line = 0, BufferPos column = 0)
+        : line(line), column(column) {}
+};
+
+class BufferIterator
+{
+public:
+    typedef BufferChar value_type;
+    typedef BufferSize difference_type;
+    typedef const value_type* pointer;
+    typedef const value_type& reference;
+    typedef std::bidirectional_iterator_tag iterator_category;
+
+    BufferIterator() : m_buffer(NULL), m_position(0) {}
+    BufferIterator(const Buffer& buffer, BufferPos position);
+    BufferIterator& operator=(const BufferIterator& iterator);
+
+    bool operator== (const BufferIterator& iterator) const;
+    bool operator!= (const BufferIterator& iterator) const;
+    bool operator<  (const BufferIterator& iterator) const;
+    bool operator<= (const BufferIterator& iterator) const;
+
+    BufferChar operator* () const;
+    BufferSize operator- (const BufferIterator& iterator) const;
+
+    BufferIterator operator+ (BufferSize size) const;
+    BufferIterator operator- (BufferSize size) const;
+
+    BufferIterator& operator+= (BufferSize size);
+    BufferIterator& operator-= (BufferSize size);
+
+    BufferIterator& operator++ ();
+    BufferIterator& operator-- ();
+
+    bool is_begin() const;
+    bool is_end() const;
+
+private:
+    const Buffer* m_buffer;
+    BufferPos     m_position;
+    friend class Buffer;
+};
+
+class Buffer
+{
+public:
+    Buffer(const std::string& name);
+
+    void           erase(const BufferIterator& begin,
+                         const BufferIterator& end);
+
+    void           insert(const BufferIterator& position,
+                          const BufferString& string);
+
+    BufferString   string(const BufferIterator& begin,
+                          const BufferIterator& end) const;
+
+    BufferIterator begin() const;
+    BufferIterator end() const;
+
+    BufferSize     length() const;
+
+    BufferIterator iterator_at(const LineAndColumn& line_and_column) const;
+    LineAndColumn  line_and_column_at(const BufferIterator& iterator) const;
+
+    LineAndColumn  clamp(const LineAndColumn& line_and_column) const;
+
+    const std::string& name() const { return m_name; }
+
+    const BufferString& content() const { return m_content; }
+
+private:
+    BufferChar at(BufferPos position) const;
+    friend class BufferIterator;
+
+    std::vector<BufferPos> m_lines;
+
+    void compute_lines();
+    BufferPos line_at(const BufferIterator& iterator) const;
+    BufferSize line_length(BufferPos line) const;
+
+    BufferString m_content;
+
+    std::string  m_name;
+};
+
+}
+
+#endif // buffer_hh_INCLUDED