From 48e007c54505dd372a5b1d2cb5e461df84c53b82 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Wed, 28 Mar 2018 14:55:54 +1100
Subject: [PATCH] debug: add gdb pretty printers for coord types

---
 debug/gdb/printers.py | 64 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 debug/gdb/printers.py

diff --git a/debug/gdb/printers.py b/debug/gdb/printers.py
new file mode 100644
index 00000000..86e1a047
--- /dev/null
+++ b/debug/gdb/printers.py
@@ -0,0 +1,64 @@
+import re
+import gdb
+
+class CoordPrinter(object):
+    def __init__(self, title, val):
+        self.title = title
+        self.val = val
+
+    def to_string(self):
+        return self.title
+
+    def display_hint(self):
+        return 'array'
+
+    class _iterator(object):
+        def __init__(self, data):
+            self.data = data
+
+        def __iter__(self):
+            indices = self.data.type.range()
+            for i in range(indices[0], indices[1] + 1):
+                res = (str(i), self.data[i])
+                yield res
+            raise StopIteration()
+
+
+    def children(self):
+        return self._iterator(self.val['data'])
+
+
+
+def build_cruft_dict():
+    pretty_printers_dict[re.compile('^util::point.*$') ] = lambda title, val: CoordPrinter(title, val)
+    pretty_printers_dict[re.compile('^util::vector.*$')] = lambda title, val: CoordPrinter(title, val)
+    pretty_printers_dict[re.compile('^util::extent.*$')] = lambda title, val: CoordPrinter(title, val)
+    pretty_printers_dict[re.compile('^util::colour.*$')] = lambda title, val: CoordPrinter(title, val)
+
+
+def lookup(val):
+    type = val.type
+
+    if type.code == gdb.TYPE_CODE_REF:
+        type = type.target()
+
+    type = type.unqualified().strip_typedefs()
+
+    typename = type.tag
+    if typename == None:
+        return None
+
+    for function in pretty_printers_dict:
+        if function.search(typename):
+            return pretty_printers_dict[function](typename, val)
+
+    return None
+
+
+def register_cruft_printers():
+    gdb.pretty_printers.append(lookup)
+
+
+pretty_printers_dict = {}
+build_cruft_dict ()
+