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import re, sys
from .core import TomlError
from .utils import rfc3339_re, parse_rfc3339_re
if sys.version_info[0] == 2:
_chr = unichr
else:
_chr = chr
def load(fin, translate=lambda t, x, v: v, object_pairs_hook=dict):
return loads(fin.read(), translate=translate, object_pairs_hook=object_pairs_hook, filename=getattr(fin, 'name', repr(fin)))
def loads(s, filename='<string>', translate=lambda t, x, v: v, object_pairs_hook=dict):
if isinstance(s, bytes):
s = s.decode('utf-8')
s = s.replace('\r\n', '\n')
root = object_pairs_hook()
tables = object_pairs_hook()
scope = root
src = _Source(s, filename=filename)
ast = _p_toml(src, object_pairs_hook=object_pairs_hook)
def error(msg):
raise TomlError(msg, pos[0], pos[1], filename)
def process_value(v, object_pairs_hook):
kind, text, value, pos = v
if kind == 'array':
if value and any(k != value[0][0] for k, t, v, p in value[1:]):
error('array-type-mismatch')
value = [process_value(item, object_pairs_hook=object_pairs_hook) for item in value]
elif kind == 'table':
value = object_pairs_hook([(k, process_value(value[k], object_pairs_hook=object_pairs_hook)) for k in value])
return translate(kind, text, value)
for kind, value, pos in ast:
if kind == 'kv':
k, v = value
if k in scope:
error('duplicate_keys. Key "{0}" was used more than once.'.format(k))
scope[k] = process_value(v, object_pairs_hook=object_pairs_hook)
else:
is_table_array = (kind == 'table_array')
cur = tables
for name in value[:-1]:
if isinstance(cur.get(name), list):
d, cur = cur[name][-1]
else:
d, cur = cur.setdefault(name, (None, object_pairs_hook()))
scope = object_pairs_hook()
name = value[-1]
if name not in cur:
if is_table_array:
cur[name] = [(scope, object_pairs_hook())]
else:
cur[name] = (scope, object_pairs_hook())
elif isinstance(cur[name], list):
if not is_table_array:
error('table_type_mismatch')
cur[name].append((scope, object_pairs_hook()))
else:
if is_table_array:
error('table_type_mismatch')
old_scope, next_table = cur[name]
if old_scope is not None:
error('duplicate_tables')
cur[name] = (scope, next_table)
def merge_tables(scope, tables):
if scope is None:
scope = object_pairs_hook()
for k in tables:
if k in scope:
error('key_table_conflict')
v = tables[k]
if isinstance(v, list):
scope[k] = [merge_tables(sc, tbl) for sc, tbl in v]
else:
scope[k] = merge_tables(v[0], v[1])
return scope
return merge_tables(root, tables)
class _Source:
def __init__(self, s, filename=None):
self.s = s
self._pos = (1, 1)
self._last = None
self._filename = filename
self.backtrack_stack = []
def last(self):
return self._last
def pos(self):
return self._pos
def fail(self):
return self._expect(None)
def consume_dot(self):
if self.s:
self._last = self.s[0]
self.s = self[1:]
self._advance(self._last)
return self._last
return None
def expect_dot(self):
return self._expect(self.consume_dot())
def consume_eof(self):
if not self.s:
self._last = ''
return True
return False
def expect_eof(self):
return self._expect(self.consume_eof())
def consume(self, s):
if self.s.startswith(s):
self.s = self.s[len(s):]
self._last = s
self._advance(s)
return True
return False
def expect(self, s):
return self._expect(self.consume(s))
def consume_re(self, re):
m = re.match(self.s)
if m:
self.s = self.s[len(m.group(0)):]
self._last = m
self._advance(m.group(0))
return m
return None
def expect_re(self, re):
return self._expect(self.consume_re(re))
def __enter__(self):
self.backtrack_stack.append((self.s, self._pos))
def __exit__(self, type, value, traceback):
if type is None:
self.backtrack_stack.pop()
else:
self.s, self._pos = self.backtrack_stack.pop()
return type == TomlError
def commit(self):
self.backtrack_stack[-1] = (self.s, self._pos)
def _expect(self, r):
if not r:
raise TomlError('msg', self._pos[0], self._pos[1], self._filename)
return r
def _advance(self, s):
suffix_pos = s.rfind('\n')
if suffix_pos == -1:
self._pos = (self._pos[0], self._pos[1] + len(s))
else:
self._pos = (self._pos[0] + s.count('\n'), len(s) - suffix_pos)
_ews_re = re.compile(r'(?:[ \t]|#[^\n]*\n|#[^\n]*\Z|\n)*')
def _p_ews(s):
s.expect_re(_ews_re)
_ws_re = re.compile(r'[ \t]*')
def _p_ws(s):
s.expect_re(_ws_re)
_escapes = { 'b': '\b', 'n': '\n', 'r': '\r', 't': '\t', '"': '"',
'\\': '\\', 'f': '\f' }
_basicstr_re = re.compile(r'[^"\\\000-\037]*')
_short_uni_re = re.compile(r'u([0-9a-fA-F]{4})')
_long_uni_re = re.compile(r'U([0-9a-fA-F]{8})')
_escapes_re = re.compile(r'[btnfr\"\\]')
_newline_esc_re = re.compile('\n[ \t\n]*')
def _p_basicstr_content(s, content=_basicstr_re):
res = []
while True:
res.append(s.expect_re(content).group(0))
if not s.consume('\\'):
break
if s.consume_re(_newline_esc_re):
pass
elif s.consume_re(_short_uni_re) or s.consume_re(_long_uni_re):
v = int(s.last().group(1), 16)
if 0xd800 <= v < 0xe000:
s.fail()
res.append(_chr(v))
else:
s.expect_re(_escapes_re)
res.append(_escapes[s.last().group(0)])
return ''.join(res)
_key_re = re.compile(r'[0-9a-zA-Z-_]+')
def _p_key(s):
with s:
s.expect('"')
r = _p_basicstr_content(s, _basicstr_re)
s.expect('"')
return r
if s.consume('\''):
if s.consume('\'\''):
s.consume('\n')
r = s.expect_re(_litstr_ml_re).group(0)
s.expect('\'\'\'')
else:
r = s.expect_re(_litstr_re).group(0)
s.expect('\'')
return r
return s.expect_re(_key_re).group(0)
_float_re = re.compile(r'[+-]?(?:0|[1-9](?:_?\d)*)(?:\.\d(?:_?\d)*)?(?:[eE][+-]?(?:\d(?:_?\d)*))?')
_basicstr_ml_re = re.compile(r'(?:""?(?!")|[^"\\\000-\011\013-\037])*')
_litstr_re = re.compile(r"[^'\000\010\012-\037]*")
_litstr_ml_re = re.compile(r"(?:(?:|'|'')(?:[^'\000-\010\013-\037]))*")
def _p_value(s, object_pairs_hook):
pos = s.pos()
if s.consume('true'):
return 'bool', s.last(), True, pos
if s.consume('false'):
return 'bool', s.last(), False, pos
if s.consume('"'):
if s.consume('""'):
s.consume('\n')
r = _p_basicstr_content(s, _basicstr_ml_re)
s.expect('"""')
else:
r = _p_basicstr_content(s, _basicstr_re)
s.expect('"')
return 'str', r, r, pos
if s.consume('\''):
if s.consume('\'\''):
s.consume('\n')
r = s.expect_re(_litstr_ml_re).group(0)
s.expect('\'\'\'')
else:
r = s.expect_re(_litstr_re).group(0)
s.expect('\'')
return 'str', r, r, pos
if s.consume_re(rfc3339_re):
m = s.last()
return 'datetime', m.group(0), parse_rfc3339_re(m), pos
if s.consume_re(_float_re):
m = s.last().group(0)
r = m.replace('_','')
if '.' in m or 'e' in m or 'E' in m:
return 'float', m, float(r), pos
else:
return 'int', m, int(r, 10), pos
if s.consume('['):
items = []
with s:
while True:
_p_ews(s)
items.append(_p_value(s, object_pairs_hook=object_pairs_hook))
s.commit()
_p_ews(s)
s.expect(',')
s.commit()
_p_ews(s)
s.expect(']')
return 'array', None, items, pos
if s.consume('{'):
_p_ws(s)
items = object_pairs_hook()
if not s.consume('}'):
k = _p_key(s)
_p_ws(s)
s.expect('=')
_p_ws(s)
items[k] = _p_value(s, object_pairs_hook=object_pairs_hook)
_p_ws(s)
while s.consume(','):
_p_ws(s)
k = _p_key(s)
_p_ws(s)
s.expect('=')
_p_ws(s)
items[k] = _p_value(s, object_pairs_hook=object_pairs_hook)
_p_ws(s)
s.expect('}')
return 'table', None, items, pos
s.fail()
def _p_stmt(s, object_pairs_hook):
pos = s.pos()
if s.consume( '['):
is_array = s.consume('[')
_p_ws(s)
keys = [_p_key(s)]
_p_ws(s)
while s.consume('.'):
_p_ws(s)
keys.append(_p_key(s))
_p_ws(s)
s.expect(']')
if is_array:
s.expect(']')
return 'table_array' if is_array else 'table', keys, pos
key = _p_key(s)
_p_ws(s)
s.expect('=')
_p_ws(s)
value = _p_value(s, object_pairs_hook=object_pairs_hook)
return 'kv', (key, value), pos
_stmtsep_re = re.compile(r'(?:[ \t]*(?:#[^\n]*)?\n)+[ \t]*')
def _p_toml(s, object_pairs_hook):
stmts = []
_p_ews(s)
with s:
stmts.append(_p_stmt(s, object_pairs_hook=object_pairs_hook))
while True:
s.commit()
s.expect_re(_stmtsep_re)
stmts.append(_p_stmt(s, object_pairs_hook=object_pairs_hook))
_p_ews(s)
s.expect_eof()
return stmts