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import os
import sys
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
from pypy.module.posix import interp_posix
from rpython.rlib import jit
_WIN32 = sys.platform == 'win32'
class Cache:
def __init__(self, space):
self.w_unsupportedoperation = space.new_exception_class(
"io.UnsupportedOperation",
space.newtuple2(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):
return _open(space, w_file, mode, buffering, encoding, errors, newline,
closefd, w_opener)
@jit.look_inside_iff(lambda space, w_file, mode, buffering, encoding, errors,
newlines, closefd, w_opener: jit.isconstant(mode))
def _open(space, w_file, mode, buffering, encoding, errors, newline, closefd,
w_opener):
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)):
w_file = interp_posix.fspath(space, w_file)
reading = writing = creating = appending = updating = text = binary = False
for i in range(1, len(mode)):
flag = mode[i]
if mode.find(flag, 0, i) != -1:
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
else:
raise oefmt(space.w_ValueError, "invalid mode: %s", mode)
if text and binary:
raise oefmt(space.w_ValueError,
"can't have text and binary mode at once")
if creating + reading + writing + appending > 1:
raise oefmt(space.w_ValueError,
"must have exactly one of create/read/write/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")
if binary and buffering == 1:
space.warn(
space.newtext(
"line buffering (buffering=1) isn't supported in "
"binary mode, the default buffer size will be used"
), space.w_RuntimeWarning
)
rawmode = ""
if reading:
rawmode = "r"
if updating:
rawmode = "r+"
elif writing:
rawmode = "w"
if updating:
rawmode = "w+"
elif creating:
rawmode = "x"
if updating:
rawmode = "x+"
elif appending:
rawmode = "a"
if updating:
rawmode = "a+"
else:
# error, will be raised from interp_fileio
if updating:
rawmode = "+"
w_result = None
try:
rawclass = W_FileIO
if _WIN32:
from pypy.module._io.interp_win32consoleio import W_WinConsoleIO, _pyio_get_console_type
typ = _pyio_get_console_type(space, w_file)
if typ != '\0':
rawclass = W_WinConsoleIO
encoding = "utf-8"
w_raw = space.call_function(
space.gettypefor(rawclass), w_file, space.newtext(rawmode),
space.newbool(bool(closefd)), w_opener)
else:
w_raw = W_FileIO(space)
w_raw.descr_init(space, w_file, rawmode, 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:
w_buffer = W_BufferedRandom(space)
w_buffer.descr_init(space, w_raw, buffering)
elif writing or creating or appending:
w_buffer = W_BufferedWriter(space)
w_buffer.descr_init(space, w_raw, buffering)
elif reading:
w_buffer = W_BufferedReader(space)
w_buffer.descr_init(space, w_raw, buffering)
else:
raise oefmt(space.w_ValueError, "unknown mode: '%s'", mode)
w_result = w_buffer
if binary:
return w_result
w_wrapper = W_TextIOWrapper(space)
w_wrapper.descr_init(space, w_buffer, encoding,
space.newtext_or_none(errors),
space.newtext_or_none(newline),
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
def open_code(space, w_file):
return open(space, w_file, "rb")
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