107 lines
3.1 KiB
Python
107 lines
3.1 KiB
Python
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from __future__ import unicode_literals
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import io, datetime, math, string, sys
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from .utils import format_rfc3339
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if sys.version_info[0] == 3:
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long = int
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unicode = str
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def dumps(obj, sort_keys=False):
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fout = io.StringIO()
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dump(obj, fout, sort_keys=sort_keys)
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return fout.getvalue()
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_escapes = {'\n': 'n', '\r': 'r', '\\': '\\', '\t': 't', '\b': 'b', '\f': 'f', '"': '"'}
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def _escape_string(s):
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res = []
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start = 0
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def flush():
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if start != i:
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res.append(s[start:i])
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return i + 1
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i = 0
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while i < len(s):
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c = s[i]
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if c in '"\\\n\r\t\b\f':
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start = flush()
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res.append('\\' + _escapes[c])
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elif ord(c) < 0x20:
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start = flush()
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res.append('\\u%04x' % ord(c))
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i += 1
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flush()
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return '"' + ''.join(res) + '"'
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_key_chars = string.digits + string.ascii_letters + '-_'
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def _escape_id(s):
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if any(c not in _key_chars for c in s):
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return _escape_string(s)
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return s
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def _format_value(v):
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if isinstance(v, bool):
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return 'true' if v else 'false'
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if isinstance(v, int) or isinstance(v, long):
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return unicode(v)
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if isinstance(v, float):
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if math.isnan(v) or math.isinf(v):
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raise ValueError("{0} is not a valid TOML value".format(v))
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else:
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return repr(v)
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elif isinstance(v, unicode) or isinstance(v, bytes):
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return _escape_string(v)
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elif isinstance(v, datetime.datetime):
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return format_rfc3339(v)
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elif isinstance(v, list):
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return '[{0}]'.format(', '.join(_format_value(obj) for obj in v))
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elif isinstance(v, dict):
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return '{{{0}}}'.format(', '.join('{} = {}'.format(_escape_id(k), _format_value(obj)) for k, obj in v.items()))
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else:
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raise RuntimeError(v)
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def dump(obj, fout, sort_keys=False):
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tables = [((), obj, False)]
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while tables:
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name, table, is_array = tables.pop()
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if name:
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section_name = '.'.join(_escape_id(c) for c in name)
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if is_array:
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fout.write('[[{0}]]\n'.format(section_name))
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else:
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fout.write('[{0}]\n'.format(section_name))
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table_keys = sorted(table.keys()) if sort_keys else table.keys()
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new_tables = []
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has_kv = False
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for k in table_keys:
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v = table[k]
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if isinstance(v, dict):
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new_tables.append((name + (k,), v, False))
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elif isinstance(v, list) and v and all(isinstance(o, dict) for o in v):
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new_tables.extend((name + (k,), d, True) for d in v)
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elif v is None:
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# based on mojombo's comment: https://github.com/toml-lang/toml/issues/146#issuecomment-25019344
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fout.write(
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'#{} = null # To use: uncomment and replace null with value\n'.format(_escape_id(k)))
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has_kv = True
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else:
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fout.write('{0} = {1}\n'.format(_escape_id(k), _format_value(v)))
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has_kv = True
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tables.extend(reversed(new_tables))
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if (name or has_kv) and tables:
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fout.write('\n')
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