repo: init

.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/python
+# Edit at https://www.toptal.com/developers/gitignore?templates=python
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+# End of https://www.toptal.com/developers/gitignore/api/python

LICENSE

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+MIT License
+
+Copyright (c) 2024 tretrauit
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# asjsonp
+
+Another simple (and stupid) JSON parser.
+
+## About
+
+This implements `.json` as described in RFC 4627, including support for all standard features and some extended features:
+
++ Comment support
++ NaN, Infinity and -Infinity support (like the standard library)
+
+## Usage
+
+## Benchmark
+
+This is about 10x slower than Python `json` module, so don't expect anything from this module.
+
+## License
+
+[MIT](./LICENSE)

asjsonp/__init__.py

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+from asjsonp.module import loads
+
+
+__all__ = ["loads"]

asjsonp/__main__.py

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+from asjsonp.module import loads
+
+
+print(loads(open("test.json", "r").read()))

asjsonp/module.py

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+__all__ = ["loads"]
+
+
+def js2py(obj: str):
+    """
+    Convert a JSON string to a Python object.
+
+    This follows the simple approach defined in https://docs.python.org/3/library/json.html#encoders-and-decoders
+    """
+    if obj == "true":
+        return True
+    elif obj == "false":
+        return False
+    elif obj == "null":
+        return None
+    elif obj == "NaN":
+        return float("nan")
+    elif obj == "Infinity":
+        return float("inf")
+    elif obj == "-Infinity":
+        return float("-inf")
+    elif obj.isnumeric():
+        return int(obj)
+    elif obj.lower().replace(".", "").replace("e", "").replace("-", "").isnumeric():
+        return float(obj)
+    else:
+        raise ValueError(f"Invalid JSON value: {obj}")
+
+
+def loads(s: str):
+    result: list | dict = []
+    first_open: bool = False
+    multiple_object_root: bool = False
+    parents: list = []
+    current: dict | list = result
+    dict_current_key: str = None
+    dict_reading_value: str = None
+    # Set the value so Pylance can be happy.
+    current_text: str = ""
+    is_reading_string: bool = False
+    # Ignore the rest of the string line if it's a comment
+    prev_char: str = ""
+    ignore_rest: bool = False
+
+    def handle_reading_value():
+        nonlocal dict_reading_value
+        nonlocal dict_current_key
+        if dict_reading_value is not None and dict_reading_value.strip():
+            value = js2py(dict_reading_value)
+            if dict_current_key:
+                current[dict_current_key] = value
+            else:
+                current.append(value)
+            dict_reading_value = None
+            dict_current_key = None
+
+    for char in s:
+        if ignore_rest:
+            if char == "\n":
+                ignore_rest = False
+        elif is_reading_string:
+            # Handle string closing quote
+            if char == '"':
+                is_reading_string = False
+                if isinstance(current, dict):
+                    if not dict_current_key:
+                        dict_current_key = current_text
+                    else:
+                        current[dict_current_key] = current_text
+                        dict_current_key = None
+                        dict_reading_value = None
+                else:
+                    current.append(current_text)
+                    dict_reading_value = None
+                current_text = ""
+            else:
+                current_text += char
+        # Handle object & array types
+        elif char in ["{", "["]:
+            obj: dict | list
+            match char:
+                case "{":
+                    if not first_open:
+                        first_open = True
+                    obj = {}
+                case "[":
+                    if not first_open:
+                        first_open = True
+                        multiple_object_root = True
+                    obj = []
+            if isinstance(current, list):
+                current.append(obj)
+            elif isinstance(current, dict):
+                current[dict_current_key] = obj
+            parents.append(current)
+            # Reference to the current dict
+            if isinstance(current, list):
+                current = current[-1]
+            elif isinstance(current, dict):
+                current = current[dict_current_key]
+                dict_current_key = None
+        # Handle object and array closing bracket
+        elif char in ["}", "]"]:
+            # Switch reference back to the parent dict
+            handle_reading_value()
+            current = parents.pop()
+        # Handle string opening quote
+        elif char == '"':
+            is_reading_string = True
+            current_text = ""
+        elif char == ":":
+            dict_reading_value = ""
+        elif char == ",":
+            handle_reading_value()
+        elif char == "/":
+            if prev_char == "/":
+                ignore_rest = True
+        else:
+            if dict_reading_value is not None:
+                if char.strip():
+                    dict_reading_value += char
+        prev_char = char
+    if not multiple_object_root:
+        result = result[0]
+    return result

benchmark/__main__.py

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+import asjsonp
+import json
+import time
+import sys
+
+
+def test_asjsonp(text: str, count: int):
+    start = time.perf_counter_ns()
+    for _ in range(count):
+        asjsonp.loads(text)
+    end = time.perf_counter_ns()
+    print(f"asjsonp.loads: {(end - start) / (1000 ** 2)}ms")
+
+
+def test_json(text: str, count: int):
+    start = time.perf_counter_ns()
+    for _ in range(count):
+        json.loads(text)
+    end = time.perf_counter_ns()
+    print(f"json.loads: {(end - start) / (1000 ** 2)}ms")
+
+
+input_file = "./benchmark/data/api.opensource.org.json"
+count = 1000
+for i, arg in enumerate(sys.argv[1:]):
+    if arg == "-i":
+        input_file = sys.argv[i + 2]
+    elif arg == "-c":
+        count = int(sys.argv[i + 2])
+text = open(input_file, "r").read()
+print(f"Benchmarking file {input_file} with {count} iterations")
+test_asjsonp(text, count)
+test_json(text, count)

pyproject.toml

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+[tool.poetry]
+name = "asjsonp"
+version = "0.1.0"
+description = "Another simple JSON parser"
+authors = ["tretrauit <tretrauit@gmail.com>"]
+license = "MIT"
+readme = "README.md"
+
+[tool.poetry.dependencies]
+python = "^3.12"
+
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

test.json

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+{
+    "object": {
+        "ubuntu": 16.04,
+        "gcc": "10",
+        "metadata": null,
+        "another-object": {
+            "oriented": "programming"
+        },
+        "a": "a",
+        "array": [
+            "sparkle",
+            "hanabi",
+            {
+                "chipi": "chapa"
+            },
+            [[[[[[[[[["among us"]]]]]]]]]]
+        ]
+    },
+    "cc": "gcc",
+    "glxgears": 123,
+    "chai": "bon",
+    "sparkle-sex": true,
+    "nan": NaN,
+    "-infinity": -Infinity,
+    "infinity": Infinity,
+    "e_number": 123e-123
+}