From 8bc6ed6cbb4e1c19ea7bc85ec2313824b19b1cf2 Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Thu, 8 Mar 2012 20:32:13 +0000
Subject: [PATCH] add gdb pretty printers for kakoune data structures

---
 gdb/kakoune.py | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/.gdbinit   |  8 ++++++
 2 files changed, 74 insertions(+)
 create mode 100644 gdb/kakoune.py
 create mode 100644 src/.gdbinit

diff --git a/gdb/kakoune.py b/gdb/kakoune.py
new file mode 100644
index 000000000..f9ef11f3a
--- /dev/null
+++ b/gdb/kakoune.py
@@ -0,0 +1,66 @@
+import gdb.printing
+
+class ArrayIterator:
+    def __init__ (self, data, count):
+        self.data = data
+        self.count = count
+        self.index = 0
+
+    def __iter__ (self):
+        return self
+
+    def next (self):
+        if self.index == self.count:
+            raise StopIteration
+
+        index = self.index
+        self.index = self.index + 1
+        return ('[%d]' % index, (self.data + index).dereference())
+
+class MemoryView:
+    """Print a memoryview"""
+
+    def __init__(self, val):
+        self.val = val
+
+    def display_hint(self):
+        return 'array'
+
+    def children(self):
+        return ArrayIterator(self.val['m_pointer'], self.val['m_size'])
+
+    def to_string(self):
+        value_type = self.val.type.template_argument(0).unqualified().strip_typedefs()
+        return "memoryview<%s>" % (value_type)
+
+class LineAndColumn:
+    """Print a LineAndColumn"""
+
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        value_type = self.val.type.unqualified()
+        return "%s(%d, %d)" % (value_type, self.val['line'], self.val['column'])
+
+class BufferIterator:
+    """ Print a BufferIterator"""
+
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        if self.val['m_buffer'] != 0:
+            return "buffer<%s>@%d" % (self.val['m_buffer'].dereference()['m_name'], self.val['m_position'])
+        else:
+            return "buffer<none>@%s" % (self.val['m_position'])
+
+def build_pretty_printer():
+    pp = gdb.printing.RegexpCollectionPrettyPrinter("kakoune")
+    pp.add_printer('memoryview',     '^Kakoune::memoryview<.*>$',    MemoryView)
+    pp.add_printer('LineAndColumn',  '^Kakoune::LineAndColumn<.*>$', LineAndColumn)
+    pp.add_printer('BufferCoord',    '^Kakoune::BufferCoord$',       LineAndColumn)
+    pp.add_printer('DisplayCoord',   '^Kakoune::DisplayCoord$',      LineAndColumn)
+    pp.add_printer('BufferIterator', '^Kakoune::BufferIterator$',    BufferIterator)
+    return pp
+
diff --git a/src/.gdbinit b/src/.gdbinit
new file mode 100644
index 000000000..77c560c2f
--- /dev/null
+++ b/src/.gdbinit
@@ -0,0 +1,8 @@
+python
+sys.path.insert(0, '../gdb/')
+import gdb.printing
+import kakoune
+gdb.printing.register_pretty_printer(
+        gdb.current_objfile(),
+        kakoune.build_pretty_printer())
+end