Merge branch 'main' into sb/zen-helpsb/zen-help

- Combine HelpCommand (this branch) with HistoryCommand (main) in zen CLI dispatcher
- Keep filter-aware TuiPickOne rewrite; adopt main's ASCII arrow glyphs in doc comment

1 files changed, 117 insertions, 0 deletions

diff --git a/thirdparty/tourist/foundation/src/buffer.cpp b/thirdparty/tourist/foundation/src/buffer.cpp
new file mode 100644
index 000000000..a4baccdef
--- /dev/null
+++ b/thirdparty/tourist/foundation/src/buffer.cpp
@@ -0,0 +1,117 @@
+#include <foundation/buffer.h>
+
+#include "slab.h"
+
+//------------------------------------------------------------------------------
+Buffer::~Buffer()
+{
+    dec_ref();
+}
+
+//------------------------------------------------------------------------------
+Buffer::Buffer(Buffer&& rhs)
+{
+    move(std::move(rhs));
+}
+
+//------------------------------------------------------------------------------
+void Buffer::operator = (Buffer&& rhs)
+{
+    move(std::move(rhs));
+}
+
+//------------------------------------------------------------------------------
+const uint8* Buffer::get_pointer() const
+{ 
+    return _slab->get_pointer() + _offset;
+}
+
+//------------------------------------------------------------------------------
+uint32 Buffer::get_size() const
+{ 
+    return _size;
+}
+
+//------------------------------------------------------------------------------
+BufferStream Buffer::create_stream() const
+{ 
+    return BufferStream(_slab, get_pointer(), get_size());
+}
+
+//------------------------------------------------------------------------------
+BufferRef Buffer::create_ref() const
+{ 
+    return BufferRef(_slab, get_pointer());
+}
+
+//------------------------------------------------------------------------------
+void Buffer::inc_ref()
+{ 
+    if (_slab != nullptr)
+        _slab->inc_ref();
+}
+
+//------------------------------------------------------------------------------
+void Buffer::dec_ref()
+{ 
+    if (_slab != nullptr)
+        _slab->dec_ref();
+    _slab = nullptr;
+}
+
+//------------------------------------------------------------------------------
+Buffer Buffer::create_sub_buffer(uint32 left, uint32 right) const
+{
+    right = std::min<uint32>(right, _size);
+    return create_sub_buffer(get_pointer() + left, right - left);
+}
+
+//------------------------------------------------------------------------------
+Buffer Buffer::create_sub_buffer(const uint8* ptr, uint32 size) const
+{
+    uint32 offset = uint32(ptrdiff_t(ptr - get_pointer()));
+    if (offset >= _size)
+        return Buffer();
+
+    Buffer buffer = clone();
+    buffer._offset += offset;
+    buffer._size = size;
+    return buffer;
+}
+
+//------------------------------------------------------------------------------
+void Buffer::move(Buffer&& rhs)
+{
+    dec_ref();
+    std::swap(_slab, rhs._slab);
+    std::swap(_offset, rhs._offset);
+    std::swap(_size, rhs._size);
+}
+
+//------------------------------------------------------------------------------
+Buffer Buffer::clone() const
+{
+    Buffer buffer;
+    buffer._slab = _slab;
+    buffer._offset = _offset;
+    buffer._size = _size;
+    buffer.inc_ref();
+    return buffer;
+}
+
+
+
+//------------------------------------------------------------------------------
+uint8* MutableBuffer::get_pointer()
+{
+    return _slab->get_pointer() + _offset;
+}
+
+//------------------------------------------------------------------------------
+MutableBuffer::MutableBuffer(Slab* slab, uint32 size, uint32 offset)
+{
+    _slab = slab;
+    _offset = offset;
+    _size = size;
+    inc_ref();
+}