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"""The unicode/str format() method"""
import math
import sys
import string
from pypy.interpreter.error import OperationError, oefmt
from rpython.rlib import rstring, runicode, rlocale, rfloat, jit
from rpython.rlib.objectmodel import specialize
from rpython.rlib.rfloat import formatd
from rpython.rlib.rarithmetic import r_uint, intmask
from pypy.interpreter.signature import Signature
@specialize.argtype(1)
@jit.look_inside_iff(lambda space, s, start, end:
jit.isconstant(s) and
jit.isconstant(start) and
jit.isconstant(end))
def _parse_int(space, s, start, end):
"""Parse a number and check for overflows"""
result = 0
i = start
while i < end:
digit = ord(s[i]) - ord('0')
if 0 <= digit <= 9:
if result > (sys.maxint - digit) / 10:
raise oefmt(space.w_ValueError,
"too many decimal digits in format string")
result = result * 10 + digit
else:
break
i += 1
if i == start:
result = -1
return result, i
# Auto number state
ANS_INIT = 1
ANS_AUTO = 2
ANS_MANUAL = 3
format_signature = Signature([], 'args', 'kwargs')
def make_template_formatting_class(for_unicode):
class TemplateFormatter(object):
is_unicode = for_unicode
if for_unicode:
def wrap(self, u):
return self.space.newunicode(u)
else:
def wrap(self, s):
return self.space.newbytes(s)
parser_list_w = None
def __init__(self, space, template):
self.space = space
self.empty = u"" if self.is_unicode else ""
self.template = template
def build(self, args, w_kwargs):
self.args = args
self.w_kwargs = w_kwargs
self.auto_numbering = 0
self.auto_numbering_state = ANS_INIT
return self._build_string(0, len(self.template), 2)
def _build_string(self, start, end, level):
space = self.space
if self.is_unicode:
out = rstring.UnicodeBuilder()
else:
out = rstring.StringBuilder()
if not level:
raise oefmt(space.w_ValueError, "Recursion depth exceeded")
level -= 1
s = self.template
return self._do_build_string(start, end, level, out, s)
@jit.look_inside_iff(lambda self, start, end, level, out, s: jit.isconstant(s))
def _do_build_string(self, start, end, level, out, s):
space = self.space
last_literal = i = start
while i < end:
c = s[i]
i += 1
if c == "{" or c == "}":
at_end = i == end
# Find escaped "{" and "}"
markup_follows = True
if c == "}":
if at_end or s[i] != "}":
raise oefmt(space.w_ValueError, "Single '}'")
i += 1
markup_follows = False
if c == "{":
if at_end:
raise oefmt(space.w_ValueError, "Single '{'")
if s[i] == "{":
i += 1
markup_follows = False
# Attach literal data, ending with { or }
out.append_slice(s, last_literal, i - 1)
if not markup_follows:
if self.parser_list_w is not None:
end_literal = i - 1
assert end_literal > last_literal
literal = self.template[last_literal:end_literal]
w_entry = space.newtuple([
self.wrap(literal),
space.w_None, space.w_None, space.w_None])
self.parser_list_w.append(w_entry)
self.last_end = i
last_literal = i
continue
nested = 1
field_start = i
recursive = False
while i < end:
c = s[i]
if c == "{":
recursive = True
nested += 1
elif c == "}":
nested -= 1
if not nested:
break
elif c == "[":
i += 1
while i < end and s[i] != "]":
i += 1
continue
i += 1
if nested:
raise oefmt(space.w_ValueError, "Unmatched '{'")
rendered = self._render_field(field_start, i, recursive, level)
out.append(rendered)
i += 1
last_literal = i
out.append_slice(s, last_literal, end)
return out.build()
# This is only ever called if we're already unrolling _do_build_string
@jit.unroll_safe
def _parse_field(self, start, end):
s = self.template
# Find ":" or "!"
i = start
while i < end:
c = s[i]
if c == ":" or c == "!":
end_name = i
if c == "!":
i += 1
if i == end:
raise oefmt(self.space.w_ValueError,
"expected conversion")
conversion = s[i]
i += 1
if i < end:
if s[i] != ':':
raise oefmt(self.space.w_ValueError,
"expected ':' after format "
"specifier")
i += 1
else:
conversion = None
i += 1
return s[start:end_name], conversion, i
elif c == "[":
while i + 1 < end and s[i + 1] != "]":
i += 1
elif c == "{":
raise oefmt(self.space.w_ValueError,
"unexpected '{' in field name")
i += 1
return s[start:end], None, end
@jit.unroll_safe
def _get_argument(self, name):
# First, find the argument.
space = self.space
i = 0
end = len(name)
while i < end:
c = name[i]
if c == "[" or c == ".":
break
i += 1
empty = not i
if empty:
index = -1
else:
index, stop = _parse_int(self.space, name, 0, i)
if stop != i:
index = -1
use_numeric = empty or index != -1
if self.auto_numbering_state == ANS_INIT and use_numeric:
if empty:
self.auto_numbering_state = ANS_AUTO
else:
self.auto_numbering_state = ANS_MANUAL
if use_numeric:
if self.auto_numbering_state == ANS_MANUAL:
if empty:
raise oefmt(space.w_ValueError,
"switching from manual to automatic "
"numbering")
elif not empty:
raise oefmt(space.w_ValueError,
"switching from automatic to manual numbering")
if empty:
index = self.auto_numbering
self.auto_numbering += 1
if index == -1:
kwarg = name[:i]
if self.is_unicode:
w_kwarg = space.newunicode(kwarg)
else:
w_kwarg = space.newbytes(kwarg)
w_arg = space.getitem(self.w_kwargs, w_kwarg)
else:
if self.args is None:
raise oefmt(space.w_ValueError,
"Format string contains positional fields")
try:
w_arg = self.args[index]
except IndexError:
raise oefmt(space.w_IndexError,
"out of range: index %d but only %d argument%s",
index, len(self.args),
"s" if len(self.args) != 1 else "")
return self._resolve_lookups(w_arg, name, i, end)
@jit.unroll_safe
def _resolve_lookups(self, w_obj, name, start, end):
# Resolve attribute and item lookups.
space = self.space
i = start
while i < end:
c = name[i]
if c == ".":
i += 1
start = i
while i < end:
c = name[i]
if c == "[" or c == ".":
break
i += 1
if start == i:
raise oefmt(space.w_ValueError,
"Empty attribute in format string")
w_attr = self.wrap(name[start:i])
if w_obj is not None:
w_obj = space.getattr(w_obj, w_attr)
else:
self.parser_list_w.append(space.newtuple([
space.w_True, w_attr]))
elif c == "[":
got_bracket = False
i += 1
start = i
while i < end:
c = name[i]
if c == "]":
got_bracket = True
break
i += 1
if not got_bracket:
raise oefmt(space.w_ValueError, "Missing ']'")
index, reached = _parse_int(self.space, name, start, i)
if index != -1 and reached == i:
w_item = space.newint(index)
else:
w_item = self.wrap(name[start:i])
i += 1 # Skip "]"
if w_obj is not None:
w_obj = space.getitem(w_obj, w_item)
else:
self.parser_list_w.append(space.newtuple([
space.w_False, w_item]))
else:
raise oefmt(space.w_ValueError,
"Only '[' and '.' may follow ']'")
return w_obj
def formatter_field_name_split(self):
space = self.space
name = self.template
i = 0
end = len(name)
while i < end:
c = name[i]
if c == "[" or c == ".":
break
i += 1
if i == 0:
index = -1
else:
index, stop = _parse_int(self.space, name, 0, i)
if stop != i:
index = -1
if index >= 0:
w_first = space.newint(index)
else:
w_first = self.wrap(name[:i])
#
self.parser_list_w = []
self._resolve_lookups(None, name, i, end)
#
return space.newtuple([w_first,
space.iter(space.newlist(self.parser_list_w))])
def _convert(self, w_obj, conversion):
space = self.space
conv = conversion[0]
if conv == "r":
return space.repr(w_obj)
elif conv == "s":
if self.is_unicode:
return space.call_function(space.w_unicode, w_obj)
return space.str(w_obj)
elif conv == "a":
from pypy.objspace.std.unicodeobject import ascii_from_object
return ascii_from_object(space, w_obj)
else:
raise oefmt(space.w_ValueError, "invalid conversion")
def _render_field(self, start, end, recursive, level):
name, conversion, spec_start = self._parse_field(start, end)
spec = self.template[spec_start:end]
#
if self.parser_list_w is not None:
# used from formatter_parser()
if level == 1: # ignore recursive calls
space = self.space
startm1 = start - 1
assert startm1 >= self.last_end
if conversion is None:
w_conversion = space.w_None
else:
w_conversion = self.wrap(conversion)
w_entry = space.newtuple([
self.wrap(self.template[self.last_end:startm1]),
self.wrap(name),
self.wrap(spec),
w_conversion])
self.parser_list_w.append(w_entry)
self.last_end = end + 1
return self.empty
#
w_obj = self._get_argument(name)
if conversion is not None:
w_obj = self._convert(w_obj, conversion)
if recursive:
spec = self._build_string(spec_start, end, level)
w_rendered = self.space.format(w_obj, self.wrap(spec))
unwrapper = "unicode_w" if self.is_unicode else "bytes_w"
to_interp = getattr(self.space, unwrapper)
return to_interp(w_rendered)
def formatter_parser(self):
self.parser_list_w = []
self.last_end = 0
self._build_string(0, len(self.template), 2)
#
space = self.space
if self.last_end < len(self.template):
w_lastentry = space.newtuple([
self.wrap(self.template[self.last_end:]),
space.w_None,
space.w_None,
space.w_None])
self.parser_list_w.append(w_lastentry)
return space.iter(space.newlist(self.parser_list_w))
return TemplateFormatter
str_template_formatter = make_template_formatting_class(for_unicode=False)
unicode_template_formatter = make_template_formatting_class(for_unicode=True)
def format_method(space, w_string, args, w_kwargs, is_unicode):
if is_unicode:
template = unicode_template_formatter(space,
space.unicode_w(w_string))
return space.newunicode(template.build(args, w_kwargs))
else:
template = str_template_formatter(space, space.bytes_w(w_string))
return space.newbytes(template.build(args, w_kwargs))
class NumberSpec(object):
pass
class BaseFormatter(object):
def format_int_or_long(self, w_num, kind):
raise NotImplementedError
def format_float(self, w_num):
raise NotImplementedError
def format_complex(self, w_num):
raise NotImplementedError
INT_KIND = 1
LONG_KIND = 2
NO_LOCALE = 1
DEFAULT_LOCALE = 2
CURRENT_LOCALE = 3
LONG_DIGITS = string.digits + string.ascii_lowercase
def make_formatting_class(for_unicode):
class Formatter(BaseFormatter):
"""__format__ implementation for builtin types."""
if for_unicode:
def wrap(self, u):
return self.space.newunicode(u)
else:
def wrap(self, s):
return self.space.newbytes(s)
is_unicode = for_unicode
_grouped_digits = None
def __init__(self, space, spec):
self.space = space
self.empty = u"" if self.is_unicode else ""
self.spec = spec
def _is_alignment(self, c):
return (c == "<" or
c == ">" or
c == "=" or
c == "^")
def _is_sign(self, c):
return (c == " " or
c == "+" or
c == "-")
def _parse_spec(self, default_type, default_align):
space = self.space
self._fill_char = self._lit(" ")[0]
self._align = default_align
self._alternate = False
self._sign = "\0"
self._thousands_sep = False
self._precision = -1
the_type = default_type
spec = self.spec
if not spec:
return True
length = len(spec)
i = 0
got_align = True
got_fill_char = False
if length - i >= 2 and self._is_alignment(spec[i + 1]):
self._align = spec[i + 1]
self._fill_char = spec[i]
got_fill_char = True
i += 2
elif length - i >= 1 and self._is_alignment(spec[i]):
self._align = spec[i]
i += 1
else:
got_align = False
if length - i >= 1 and self._is_sign(spec[i]):
self._sign = spec[i]
i += 1
if length - i >= 1 and spec[i] == "#":
self._alternate = True
i += 1
if not got_fill_char and length - i >= 1 and spec[i] == "0":
self._fill_char = self._lit("0")[0]
if not got_align:
self._align = "="
i += 1
self._width, i = _parse_int(self.space, spec, i, length)
if length != i and spec[i] == ",":
self._thousands_sep = True
i += 1
if length != i and spec[i] == ".":
i += 1
self._precision, i = _parse_int(self.space, spec, i, length)
if self._precision == -1:
raise oefmt(space.w_ValueError, "no precision given")
if length - i > 1:
raise oefmt(space.w_ValueError, "invalid format spec")
if length - i == 1:
presentation_type = spec[i]
if self.is_unicode:
try:
the_type = spec[i].encode("ascii")[0]
except UnicodeEncodeError:
raise oefmt(space.w_ValueError,
"invalid presentation type")
else:
the_type = presentation_type
i += 1
self._type = the_type
if self._thousands_sep:
tp = self._type
if (tp == "d" or
tp == "e" or
tp == "f" or
tp == "g" or
tp == "E" or
tp == "G" or
tp == "%" or
tp == "F" or
tp == "\0"):
# ok
pass
else:
raise oefmt(space.w_ValueError, "invalid type with ','")
return False
def _calc_padding(self, string, length):
"""compute left and right padding, return total width of string"""
if self._width != -1 and length < self._width:
total = self._width
else:
total = length
align = self._align
if align == ">":
left = total - length
elif align == "^":
left = (total - length) / 2
elif align == "<" or align == "=":
left = 0
else:
raise AssertionError("shouldn't be here")
right = total - length - left
self._left_pad = left
self._right_pad = right
return total
def _lit(self, s):
if self.is_unicode:
return s.decode("latin-1")
else:
return s
def _pad(self, string):
builder = self._builder()
builder.append_multiple_char(self._fill_char, self._left_pad)
builder.append(string)
builder.append_multiple_char(self._fill_char, self._right_pad)
return builder.build()
def _builder(self):
if self.is_unicode:
return rstring.UnicodeBuilder()
else:
return rstring.StringBuilder()
def _unknown_presentation(self, tp):
raise oefmt(self.space.w_ValueError,
"unknown presentation for %s: '%s'", tp, self._type)
def format_string(self, w_string):
space = self.space
if not space.is_w(space.type(w_string), space.w_unicode):
w_string = space.str(w_string)
string = space.unicode_w(w_string)
if self._parse_spec("s", "<"):
return self.wrap(string)
if self._type != "s":
self._unknown_presentation("string")
if self._sign != "\0":
raise oefmt(space.w_ValueError,
"Sign not allowed in string format specifier")
if self._alternate:
raise oefmt(space.w_ValueError,
"Alternate form (#) not allowed in string format "
"specifier")
if self._align == "=":
raise oefmt(space.w_ValueError,
"'=' alignment not allowed in string format "
"specifier")
length = len(string)
precision = self._precision
if precision != -1 and length >= precision:
assert precision >= 0
length = precision
string = string[:precision]
self._calc_padding(string, length)
return self.wrap(self._pad(string))
def _get_locale(self, tp):
if tp == "n":
dec, thousands, grouping = rlocale.numeric_formatting()
elif self._thousands_sep:
dec = "."
thousands = ","
grouping = "\3"
else:
dec = "."
thousands = ""
grouping = "\xFF" # special value to mean 'stop'
if self.is_unicode:
self._loc_dec = dec.decode("latin-1")
self._loc_thousands = thousands.decode("latin-1")
else:
self._loc_dec = dec
self._loc_thousands = thousands
self._loc_grouping = grouping
def _calc_num_width(self, n_prefix, sign_char, to_number, n_number,
n_remainder, has_dec, digits):
"""Calculate widths of all parts of formatted number.
Output will look like:
<lpadding> <sign> <prefix> <spadding> <grouped_digits> <decimal>
<remainder> <rpadding>
sign is computed from self._sign, and the sign of the number
prefix is given
digits is known
"""
spec = NumberSpec()
spec.n_digits = n_number - n_remainder - has_dec
spec.n_prefix = n_prefix
spec.n_lpadding = 0
spec.n_decimal = int(has_dec)
spec.n_remainder = n_remainder
spec.n_spadding = 0
spec.n_rpadding = 0
spec.n_min_width = 0
spec.n_total = 0
spec.sign = "\0"
spec.n_sign = 0
sign = self._sign
if sign == "+":
spec.n_sign = 1
spec.sign = "-" if sign_char == "-" else "+"
elif sign == " ":
spec.n_sign = 1
spec.sign = "-" if sign_char == "-" else " "
elif sign_char == "-":
spec.n_sign = 1
spec.sign = "-"
extra_length = (spec.n_sign + spec.n_prefix + spec.n_decimal +
spec.n_remainder) # Not padding or digits
if self._fill_char == "0" and self._align == "=":
spec.n_min_width = self._width - extra_length
if self._loc_thousands:
self._group_digits(spec, digits[to_number:])
n_grouped_digits = len(self._grouped_digits)
else:
n_grouped_digits = spec.n_digits
n_padding = self._width - (extra_length + n_grouped_digits)
if n_padding > 0:
align = self._align
if align == "<":
spec.n_rpadding = n_padding
elif align == ">":
spec.n_lpadding = n_padding
elif align == "^":
spec.n_lpadding = n_padding // 2
spec.n_rpadding = n_padding - spec.n_lpadding
elif align == "=":
spec.n_spadding = n_padding
else:
raise AssertionError("shouldn't reach")
spec.n_total = spec.n_lpadding + spec.n_sign + spec.n_prefix + \
spec.n_spadding + n_grouped_digits + \
spec.n_decimal + spec.n_remainder + spec.n_rpadding
return spec
def _fill_digits(self, buf, digits, d_state, n_chars, n_zeros,
thousands_sep):
if thousands_sep:
for c in thousands_sep:
buf.append(c)
for i in range(d_state - 1, d_state - n_chars - 1, -1):
buf.append(digits[i])
for i in range(n_zeros):
buf.append("0")
def _group_digits(self, spec, digits):
buf = []
grouping = self._loc_grouping
min_width = spec.n_min_width
grouping_state = 0
left = spec.n_digits
n_ts = len(self._loc_thousands)
need_separator = False
done = False
previous = 0
while True:
if grouping_state >= len(grouping):
group = previous # end of string
else:
# else, get the next value from the string
group = ord(grouping[grouping_state])
if group == 0xFF: # special value to mean 'stop'
break
grouping_state += 1
previous = group
#
final_grouping = min(group, max(left, max(min_width, 1)))
n_zeros = max(0, final_grouping - left)
n_chars = max(0, min(left, final_grouping))
ts = self._loc_thousands if need_separator else None
self._fill_digits(buf, digits, left, n_chars, n_zeros, ts)
need_separator = True
left -= n_chars
min_width -= final_grouping
if left <= 0 and min_width <= 0:
done = True
break
min_width -= n_ts
if not done:
group = max(max(left, min_width), 1)
n_zeros = max(0, group - left)
n_chars = max(0, min(left, group))
ts = self._loc_thousands if need_separator else None
self._fill_digits(buf, digits, left, n_chars, n_zeros, ts)
buf.reverse()
self._grouped_digits = self.empty.join(buf)
def _upcase_string(self, s):
buf = []
for c in s:
index = ord(c)
if ord("a") <= index <= ord("z"):
c = chr(index - 32)
buf.append(c)
return self.empty.join(buf)
def _fill_number(self, spec, num, to_digits, to_prefix, fill_char,
to_remainder, upper, grouped_digits=None):
out = self._builder()
if spec.n_lpadding:
out.append_multiple_char(fill_char[0], spec.n_lpadding)
if spec.n_sign:
if self.is_unicode:
sign = spec.sign.decode("latin-1")
else:
sign = spec.sign
out.append(sign)
if spec.n_prefix:
pref = num[to_prefix:to_prefix + spec.n_prefix]
if upper:
pref = self._upcase_string(pref)
out.append(pref)
if spec.n_spadding:
out.append_multiple_char(fill_char[0], spec.n_spadding)
if spec.n_digits != 0:
if self._loc_thousands:
if grouped_digits is not None:
digits = grouped_digits
else:
digits = self._grouped_digits
assert digits is not None
else:
stop = to_digits + spec.n_digits
assert stop >= 0
digits = num[to_digits:stop]
if upper:
digits = self._upcase_string(digits)
out.append(digits)
if spec.n_decimal:
out.append(self._lit(".")[0])
if spec.n_remainder:
out.append(num[to_remainder:])
if spec.n_rpadding:
out.append_multiple_char(fill_char[0], spec.n_rpadding)
#if complex, need to call twice - just retun the buffer
return out.build()
def _format_int_or_long(self, w_num, kind):
space = self.space
if self._precision != -1:
raise oefmt(space.w_ValueError,
"precision not allowed in integer type")
sign_char = "\0"
tp = self._type
if tp == "c":
if self._sign != "\0":
raise oefmt(space.w_ValueError,
"sign not allowed with 'c' presentation type")
if self._alternate:
raise oefmt(space.w_ValueError,
"Alternate form (#) not allowed "
"with 'c' presentation type")
value = space.int_w(w_num)
max_char = runicode.MAXUNICODE if self.is_unicode else 0xFF
if not (0 <= value <= max_char):
raise oefmt(space.w_OverflowError,
"%%c arg not in range(%s)",
hex(max_char))
if self.is_unicode:
result = runicode.UNICHR(value)
else:
result = chr(value)
n_digits = 1
n_remainder = 1
to_remainder = 0
n_prefix = 0
to_prefix = 0
to_numeric = 0
else:
if tp == "b":
base = 2
skip_leading = 2
elif tp == "o":
base = 8
skip_leading = 2
elif tp == "x" or tp == "X":
base = 16
skip_leading = 2
elif tp == "n" or tp == "d":
base = 10
skip_leading = 0
else:
raise AssertionError("shouldn't reach")
if kind == INT_KIND:
result = self._int_to_base(base, space.int_w(w_num))
else:
result = self._long_to_base(base, space.bigint_w(w_num))
n_prefix = skip_leading if self._alternate else 0
to_prefix = 0
if result[0] == "-":
sign_char = "-"
skip_leading += 1
to_prefix += 1
n_digits = len(result) - skip_leading
n_remainder = 0
to_remainder = 0
to_numeric = skip_leading
self._get_locale(tp)
spec = self._calc_num_width(n_prefix, sign_char, to_numeric, n_digits,
n_remainder, False, result)
fill = self._fill_char
upper = self._type == "X"
return self.wrap(self._fill_number(spec, result, to_numeric,
to_prefix, fill, to_remainder, upper))
def _long_to_base(self, base, value):
prefix = ""
if base == 2:
prefix = "0b"
elif base == 8:
prefix = "0o"
elif base == 16:
prefix = "0x"
as_str = value.format(LONG_DIGITS[:base], prefix)
if self.is_unicode:
return as_str.decode("latin-1")
return as_str
def _int_to_base(self, base, value):
if base == 10:
s = str(value)
if self.is_unicode:
return s.decode("latin-1")
return s
# This part is slow.
negative = value < 0
base = r_uint(base)
value = r_uint(value)
if negative: # change the sign on the unsigned number: otherwise,
value = -value # we'd risk overflow if value==-sys.maxint-1
#
buf = ["\0"] * (8 * 8 + 6) # Too much on 32 bit, but who cares?
i = len(buf) - 1
while True:
div = value // base # unsigned
mod = value - div * base # unsigned, always in range(0,base)
digit = intmask(mod)
digit += ord("0") if digit < 10 else ord("a") - 10
buf[i] = chr(digit)
value = div # unsigned
i -= 1
if not value:
break
if base == r_uint(2):
buf[i] = "b"
buf[i - 1] = "0"
elif base == r_uint(8):
buf[i] = "o"
buf[i - 1] = "0"
elif base == r_uint(16):
buf[i] = "x"
buf[i - 1] = "0"
else:
buf[i] = "#"
buf[i - 1] = chr(ord("0") + intmask(base % r_uint(10)))
if base > r_uint(10):
buf[i - 2] = chr(ord("0") + intmask(base // r_uint(10)))
i -= 1
i -= 1
if negative:
i -= 1
buf[i] = "-"
assert i >= 0
return self.empty.join(buf[i:])
def format_int_or_long(self, w_num, kind):
space = self.space
if self._parse_spec("d", ">"):
if self.is_unicode:
return space.call_function(space.w_unicode, w_num)
return self.space.str(w_num)
tp = self._type
if (tp == "b" or
tp == "c" or
tp == "d" or
tp == "o" or
tp == "x" or
tp == "X" or
tp == "n"):
return self._format_int_or_long(w_num, kind)
elif (tp == "e" or
tp == "E" or
tp == "f" or
tp == "F" or
tp == "g" or
tp == "G" or
tp == "%"):
w_float = space.float(w_num)
return self._format_float(w_float)
else:
self._unknown_presentation("int" if kind == INT_KIND else "long")
def _parse_number(self, s, i):
"""Determine if s has a decimal point, and the index of the first #
after the decimal, or the end of the number."""
length = len(s)
while i < length and "0" <= s[i] <= "9":
i += 1
rest = i
dec_point = i < length and s[i] == "."
if dec_point:
rest += 1
#differs from CPython method - CPython sets n_remainder
return dec_point, rest
def _format_float(self, w_float):
"""helper for format_float"""
space = self.space
flags = 0
default_precision = 6
if self._alternate:
flags |= rfloat.DTSF_ALT
tp = self._type
self._get_locale(tp)
if tp == "\0":
flags |= rfloat.DTSF_ADD_DOT_0
tp = "r"
default_precision = 0
elif tp == "n":
tp = "g"
value = space.float_w(w_float)
if tp == "%":
tp = "f"
value *= 100
add_pct = True
else:
add_pct = False
if self._precision == -1:
self._precision = default_precision
elif tp == "r":
tp = "g"
result, special = rfloat.double_to_string(value, tp,
self._precision, flags)
if add_pct:
result += "%"
n_digits = len(result)
if result[0] == "-":
sign = "-"
to_number = 1
n_digits -= 1
else:
sign = "\0"
to_number = 0
have_dec_point, to_remainder = self._parse_number(result, to_number)
n_remainder = len(result) - to_remainder
if self.is_unicode:
digits = result.decode("latin-1")
else:
digits = result
spec = self._calc_num_width(0, sign, to_number, n_digits,
n_remainder, have_dec_point, digits)
fill = self._fill_char
return self.wrap(self._fill_number(spec, digits, to_number, 0,
fill, to_remainder, False))
def format_float(self, w_float):
space = self.space
if self._parse_spec("\0", ">"):
if self.is_unicode:
return space.call_function(space.w_unicode, w_float)
return space.str(w_float)
tp = self._type
if (tp == "\0" or
tp == "e" or
tp == "E" or
tp == "f" or
tp == "F" or
tp == "g" or
tp == "G" or
tp == "n" or
tp == "%"):
return self._format_float(w_float)
self._unknown_presentation("float")
def _format_complex(self, w_complex):
flags = 0
space = self.space
tp = self._type
self._get_locale(tp)
default_precision = 6
if self._align == "=":
# '=' alignment is invalid
raise oefmt(space.w_ValueError,
"'=' alignment flag is not allowed in complex "
"format specifier")
if self._fill_char == "0":
# zero padding is invalid
raise oefmt(space.w_ValueError,
"Zero padding is not allowed in complex format "
"specifier")
if self._alternate:
flags |= rfloat.DTSF_ALT
skip_re = 0
add_parens = 0
if tp == "\0":
#should mirror str() output
tp = "g"
default_precision = 12
#test if real part is non-zero
if (w_complex.realval == 0 and
math.copysign(1., w_complex.realval) == 1.):
skip_re = 1
else:
add_parens = 1
if tp == "n":
#same as 'g' except for locale, taken care of later
tp = "g"
#check if precision not set
if self._precision == -1:
self._precision = default_precision
#in CPython it's named 're' - clashes with re module
re_num, special = rfloat.double_to_string(w_complex.realval, tp, self._precision, flags)
im_num, special = rfloat.double_to_string(w_complex.imagval, tp, self._precision, flags)
n_re_digits = len(re_num)
n_im_digits = len(im_num)
to_real_number = 0
to_imag_number = 0
re_sign = im_sign = ''
#if a sign character is in the output, remember it and skip
if re_num[0] == "-":
re_sign = "-"
to_real_number = 1
n_re_digits -= 1
if im_num[0] == "-":
im_sign = "-"
to_imag_number = 1
n_im_digits -= 1
#turn off padding - do it after number composition
#calc_num_width uses self._width, so assign to temporary variable,
#calculate width of real and imag parts, then reassign padding, align
tmp_fill_char = self._fill_char
tmp_align = self._align
tmp_width = self._width
self._fill_char = "\0"
self._align = "<"
self._width = -1
#determine if we have remainder, might include dec or exponent or both
re_have_dec, re_remainder_ptr = self._parse_number(re_num,
to_real_number)
im_have_dec, im_remainder_ptr = self._parse_number(im_num,
to_imag_number)
if self.is_unicode:
re_num = re_num.decode("latin-1")
im_num = im_num.decode("latin-1")
#set remainder, in CPython _parse_number sets this
#using n_re_digits causes tests to fail
re_n_remainder = len(re_num) - re_remainder_ptr
im_n_remainder = len(im_num) - im_remainder_ptr
re_spec = self._calc_num_width(0, re_sign, to_real_number, n_re_digits,
re_n_remainder, re_have_dec,
re_num)
#capture grouped digits b/c _fill_number reads from self._grouped_digits
#self._grouped_digits will get overwritten in imaginary calc_num_width
re_grouped_digits = self._grouped_digits
if not skip_re:
self._sign = "+"
im_spec = self._calc_num_width(0, im_sign, to_imag_number, n_im_digits,
im_n_remainder, im_have_dec,
im_num)
im_grouped_digits = self._grouped_digits
if skip_re:
re_spec.n_total = 0
#reassign width, alignment, fill character
self._align = tmp_align
self._width = tmp_width
self._fill_char = tmp_fill_char
#compute L and R padding - stored in self._left_pad and self._right_pad
self._calc_padding(self.empty, re_spec.n_total + im_spec.n_total + 1 +
add_parens * 2)
out = self._builder()
fill = self._fill_char
#compose the string
#add left padding
out.append_multiple_char(fill, self._left_pad)
if add_parens:
out.append(self._lit('(')[0])
#if the no. has a real component, add it
if not skip_re:
out.append(self._fill_number(re_spec, re_num, to_real_number, 0,
fill, re_remainder_ptr, False,
re_grouped_digits))
#add imaginary component
out.append(self._fill_number(im_spec, im_num, to_imag_number, 0,
fill, im_remainder_ptr, False,
im_grouped_digits))
#add 'j' character
out.append(self._lit('j')[0])
if add_parens:
out.append(self._lit(')')[0])
#add right padding
out.append_multiple_char(fill, self._right_pad)
return self.wrap(out.build())
def format_complex(self, w_complex):
"""return the string representation of a complex number"""
space = self.space
#parse format specification, set associated variables
if self._parse_spec("\0", ">"):
return space.str(w_complex)
tp = self._type
if (tp == "\0" or
tp == "e" or
tp == "E" or
tp == "f" or
tp == "F" or
tp == "g" or
tp == "G" or
tp == "n"):
return self._format_complex(w_complex)
self._unknown_presentation("complex")
return Formatter
unicode_formatter = make_formatting_class(for_unicode=True)
@specialize.arg(2)
def run_formatter(space, w_format_spec, meth, *args):
formatter = unicode_formatter(space, space.unicode_w(w_format_spec))
return getattr(formatter, meth)(*args)
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