name mangling bugfixes; ndi file generation for debugger support

compiler/ndi.nim

@@ -0,0 +1,40 @@
+#
+#
+#           The Nim Compiler
+#        (c) Copyright 2017 Andreas Rumpf
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+## This module implements the generation of ``.ndi`` files for better debugging
+## support of Nim code. "ndi" stands for "Nim debug info".
+
+import ast, msgs, ropes
+
+type
+  NdiFile* = object
+    enabled: bool
+    f: File
+    buf: string
+
+proc doWrite(f: var NdiFile; s: PSym) =
+  f.buf.setLen 0
+  f.buf.add s.info.line.int
+  f.buf.add "\t"
+  f.buf.add s.info.col.int
+  f.f.write(s.name.s, "\t")
+  f.f.writeRope(s.loc.r)
+  f.f.writeLine("\t", s.info.toFullPath, "\t", f.buf)
+
+template writeMangledName*(f: NdiFile; s: PSym) =
+  if f.enabled: doWrite(f, s)
+
+proc open*(f: var NdiFile; filename: string) =
+  f.enabled = filename.len > 0
+  if f.enabled:
+    f.f = open(filename, fmWrite, 8000)
+    f.buf = newStringOfCap(20)
+
+proc close*(f: var NdiFile) =
+  if f.enabled: close(f.f)