Move some buffer related utility functions to buffer_utils.{cc,hh}

1 files changed, 23 insertions, 0 deletions

diff --git a/src/buffer_utils.cc b/src/buffer_utils.cc
new file mode 100644
index 00000000..af61cb19
--- /dev/null
+++ b/src/buffer_utils.cc
@@ -0,0 +1,23 @@
+#include "buffer_utils.hh"
+
+namespace Kakoune
+{
+
+CharCount get_column(const Buffer& buffer,
+                     CharCount tabstop, BufferCoord coord)
+{
+    auto& line = buffer[coord.line];
+    auto col = 0_char;
+    for (auto it = line.begin();
+         it != line.end() and coord.column > (int)(it - line.begin());
+         it = utf8::next(it))
+    {
+        if (*it == '\t')
+            col = (col / tabstop + 1) * tabstop;
+        else
+            ++col;
+    }
+    return col;
+}
+
+}