utils: source map generator

Author: krishpranav

src/utils/source_map_generator.cr

@@ -0,0 +1,45 @@
+# -----------------------------------------------------------------------
+# This file is part of MoonScript
+#
+# MoonSript is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# MoonSript is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with MoonSript.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Copyright (C) 2025 Krisna Pranav, MoonScript Developers
+# -----------------------------------------------------------------------
+
+module MoonScript
+  class SourceMapGenerator
+    alias Mapping = Tuple(Ast::Node | Nil, Tuple(Int32, Int32), String | Nil)
+
+    getter mappings = {} of Int32 => Array(Mapping)
+
+    getter sources_content = [] of String
+
+    getter sources_names = [] of String
+
+    getter sources = [] of String
+
+    def initialize(unsorted: Deque(Mapping), @generated)
+        unsorted.each do |item|
+            (mappings[item[1][0]] ||= [] of Mapping) << item
+        end
+    end
+
+    def get_source_index(file)
+        sources.index(file.path) || begin
+            sources_content << file.contents
+            sources << file.path
+            sources.size - 1 
+    end
+  end
+end