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import os
from pypy.interpreter.error import OperationError, oefmt
from pypy.interpreter.gateway import interp2app, unwrap_spec
from pypy.interpreter.typedef import (
TypeDef, interp_attrproperty, generic_new_descr)
from pypy.module._io.interp_fileio import W_FileIO
from pypy.module._io.interp_textio import W_TextIOWrapper
class Cache:
def __init__(self, space):
self.w_unsupportedoperation = space.new_exception_class(
"io.UnsupportedOperation",
space.newtuple([space.w_ValueError, space.w_IOError]))
@unwrap_spec(mode='text', buffering=int,
encoding="text_or_none", errors="text_or_none",
newline="text_or_none", closefd=int)
def open(space, w_file, mode="r", buffering=-1, encoding=None, errors=None,
newline=None, closefd=True, w_opener=None):
from pypy.module._io.interp_bufferedio import (W_BufferedRandom,
W_BufferedWriter, W_BufferedReader)
if not (space.isinstance_w(w_file, space.w_unicode) or
space.isinstance_w(w_file, space.w_bytes) or
space.isinstance_w(w_file, space.w_int)):
raise oefmt(space.w_TypeError, "invalid file: %R", w_file)
reading = writing = creating = appending = updating = text = binary = universal = False
uniq_mode = {}
for flag in mode:
uniq_mode[flag] = None
if len(uniq_mode) != len(mode):
raise oefmt(space.w_ValueError, "invalid mode: %s", mode)
for flag in mode:
if flag == "r":
reading = True
elif flag == "w":
writing = True
elif flag == "x":
creating = True
elif flag == "a":
appending = True
elif flag == "+":
updating = True
elif flag == "t":
text = True
elif flag == "b":
binary = True
elif flag == "U":
universal = True
reading = True
else:
raise oefmt(space.w_ValueError, "invalid mode: %s", mode)
rawmode = ""
if reading:
rawmode += "r"
if writing:
rawmode += "w"
if creating:
rawmode += "x"
if appending:
rawmode += "a"
if updating:
rawmode += "+"
if universal:
if writing or appending:
raise oefmt(space.w_ValueError,
"can't use U and writing mode at once")
space.warn(space.newtext("'U' mode is deprecated ('r' has the same "
"effect in Python 3.x)"),
space.w_DeprecationWarning)
if text and binary:
raise oefmt(space.w_ValueError,
"can't have text and binary mode at once")
if reading + writing + creating + appending > 1:
raise oefmt(space.w_ValueError,
"must have exactly one of read/write/create/append mode")
if binary and encoding is not None:
raise oefmt(space.w_ValueError,
"binary mode doesn't take an encoding argument")
if binary and newline is not None:
raise oefmt(space.w_ValueError,
"binary mode doesn't take a newline argument")
w_result = None
try:
w_raw = space.call_function(
space.gettypefor(W_FileIO), w_file, space.newtext(rawmode),
space.newbool(bool(closefd)), w_opener)
w_result = w_raw
isatty = space.is_true(space.call_method(w_raw, "isatty"))
line_buffering = buffering == 1 or (buffering < 0 and isatty)
if line_buffering:
buffering = -1
if buffering < 0:
buffering = space.c_int_w(space.getattr(
w_raw, space.newtext("_blksize")))
if buffering < 0:
raise oefmt(space.w_ValueError, "invalid buffering size")
if buffering == 0:
if not binary:
raise oefmt(space.w_ValueError,
"can't have unbuffered text I/O")
return w_result
if updating:
buffer_cls = W_BufferedRandom
elif writing or creating or appending:
buffer_cls = W_BufferedWriter
elif reading:
buffer_cls = W_BufferedReader
else:
raise oefmt(space.w_ValueError, "unknown mode: '%s'", mode)
w_buffer = space.call_function(
space.gettypefor(buffer_cls), w_raw, space.newint(buffering)
)
w_result = w_buffer
if binary:
return w_result
w_wrapper = space.call_function(space.gettypefor(W_TextIOWrapper),
w_buffer,
space.newtext_or_none(encoding),
space.newtext_or_none(errors),
space.newtext_or_none(newline),
space.newbool(line_buffering)
)
w_result = w_wrapper
space.setattr(w_wrapper, space.newtext("mode"), space.newtext(mode))
return w_result
except OperationError as e:
if w_result:
try:
space.call_method(w_result, "close")
except OperationError as e2:
e.chain_exceptions(space, e2)
raise
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