[libc] added newhdrgen class implementation (llvm#96710)

Added a class representation of a libc header file, allowing for easier
conversion from YAML to .h file output.

Classes include:
- Function (representing function headers)
- Include (representing various include statements found on a header
  file)
- Macro (representing macro definitions)
- Enumeration (representing enum definitions)
- Type (representing include statements for NamedTypes)
- Object (representing ObjectSpec defintitions)

libc/newhdrgen/class_implementation/classes/enumeration.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+#
+# ====-- Enumeration class for libc function headers ----------*- python -*--==#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# ==-------------------------------------------------------------------------==#
+
+
+class Enumeration:
+    def __init__(self, name, value=None):
+        self.name = name
+        self.value = value
+
+    def __str__(self):
+        if self.value != None:
+            return f"{self.name} = {self.value}"
+        else:
+            return f"{self.name}"

libc/newhdrgen/class_implementation/classes/function.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+#
+# ====-- Function class for libc function headers -------------*- python -*--==#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# ==-------------------------------------------------------------------------==#
+
+
+class Function:
+    def __init__(
+        self, standards, return_type, name, arguments, guard=None, attributes=[]
+    ):
+        self.standards = standards
+        self.return_type = return_type
+        self.name = name
+        self.arguments = [arg["type"] for arg in arguments]
+        self.guard = guard
+        self.attributes = attributes
+
+    def __str__(self):
+        args_str = ", ".join(self.arguments)
+        attributes_str = " ".join(self.attributes)
+        result = f"{self.return_type} {self.name}({args_str}){attributes_str};"
+        if self.guard:
+            result = f"#ifdef {self.guard}\n{result}\n#endif // {self.guard}"
+        return result

libc/newhdrgen/class_implementation/classes/include.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+#
+# ====-- Include class for libc function headers --------------*- python -*--==#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# ==-------------------------------------------------------------------------==#
+
+
+class Include:
+    def __init__(self, name):
+        self.name = name
+
+    def __str__(self):
+        return f'#include "{self.name}"'

libc/newhdrgen/class_implementation/classes/macro.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+#
+# ====-- Macro class for libc function headers ----------------*- python -*--==#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# ==-------------------------------------------------------------------------==#
+
+
+class Macro:
+    def __init__(self, name, value=None):
+        self.name = name
+        self.value = value
+
+    def __str__(self):
+        if self.value != None:
+            return f"#define {self.name} {self.value}"
+        else:
+            return f"#define {self.name}"

libc/newhdrgen/class_implementation/classes/object.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+#
+# ====-- Object class for libc function headers ---------------*- python -*--==#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# ==-------------------------------------------------------------------------==#
+
+
+class Object:
+    def __init__(self, name, type):
+        self.name = name
+        self.type = type
+
+    def __str__(self):
+        return f"extern {self.type} {self.name}"

libc/newhdrgen/class_implementation/classes/type.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+#
+# ====-- Type class for libc function headers -----------------*- python -*--==#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# ==-------------------------------------------------------------------------==#
+
+
+class Type:
+    def __init__(self, type_name):
+        self.type_name = type_name
+
+    def __str__(self):
+        return f"#include <llvm-libc-types/{self.type_name}.h>"