#     Copyright 2015, Kay Hayen, mailto:kay.hayen@gmail.com
#
#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.
#
""" Generate code that updates the source code line.

"""

def getLineNumberUpdateCode(context):
    frame_handle = context.getFrameHandle()

    if frame_handle is None:
        return ""
    else:
        source_ref = context.getCurrentSourceCodeReference()

        if source_ref.isInternal():
            return "%s->f_lineno = %d;" % (
                frame_handle,
                source_ref.getLineNumber()
            )
        else:
            return ""


def emitLineNumberUpdateCode(context, emit):
    code = getLineNumberUpdateCode(context)

    if code:
        emit(code)


def getSetLineNumberCodeRaw(to_name, emit, context):
    assert context.getFrameHandle() is not None

    emit(
        "%s->f_lineno = %s;" % (
            context.getFrameHandle(),
            to_name
        )
    )


def getLineNumberCode(to_name, emit, context):
    assert context.getFrameHandle() is not None

    emit(
        "%s = %s->f_lineno;"  % (
            to_name,
            context.getFrameHandle()
        )
    )
