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from pypy.interpreter.error import OperationError, oefmt, wrap_oserror
from pypy.interpreter.baseobjspace import W_Root
from pypy.interpreter.typedef import TypeDef, GetSetProperty, make_weakref_descr
from pypy.interpreter.gateway import interp2app, unwrap_spec, WrappedDefault
from pypy.interpreter.buffer import SimpleView
from rpython.rlib import rmmap, rarithmetic, objectmodel
from rpython.rlib.buffer import RawBuffer
from rpython.rlib.rmmap import RValueError, RTypeError, RMMapError
from rpython.rlib.rstring import StringBuilder
if rmmap.HAVE_LARGEFILE_SUPPORT:
OFF_T = rarithmetic.r_longlong
else:
OFF_T = int
class W_MMap(W_Root):
def __init__(self, space, mmap_obj):
self.space = space
self.mmap = mmap_obj
def buffer_w(self, space, flags):
self.check_valid()
readonly = (self.mmap.access == ACCESS_READ)
write_required = bool(flags & space.BUF_WRITABLE)
if write_required and readonly:
raise oefmt(space.w_BufferError, "Object is not writable.")
return SimpleView(MMapBuffer(self.space, self.mmap, readonly))
def close(self):
self.mmap.close()
def read_byte(self):
self.check_valid()
try:
return self.space.newint(ord(self.mmap.read_byte()))
except RValueError as v:
raise mmap_error(self.space, v)
def readline(self):
self.check_valid()
return self.space.newbytes(self.mmap.readline())
@unwrap_spec(w_num=WrappedDefault(None))
def read(self, w_num):
self.check_valid()
if self.space.is_none(w_num):
num = -1
else:
num = self.space.int_w(w_num)
return self.space.newbytes(self.mmap.read(num))
def find(self, w_tofind, w_start=None, w_end=None):
self.check_valid()
space = self.space
tofind = space.charbuf_w(w_tofind)
if w_start is None:
start = self.mmap.pos
else:
start = space.getindex_w(w_start, None)
if w_end is None:
end = self.mmap.size
else:
end = space.getindex_w(w_end, None)
return space.newint(self.mmap.find(tofind, start, end))
def rfind(self, w_tofind, w_start=None, w_end=None):
self.check_valid()
space = self.space
tofind = space.charbuf_w(w_tofind)
if w_start is None:
start = self.mmap.pos
else:
start = space.getindex_w(w_start, None)
if w_end is None:
end = self.mmap.size
else:
end = space.getindex_w(w_end, None)
return space.newint(self.mmap.find(tofind, start, end, True))
@unwrap_spec(pos=OFF_T, whence=int)
def seek(self, pos, whence=0):
self.check_valid()
try:
self.mmap.seek(pos, whence)
except RValueError as v:
raise mmap_error(self.space, v)
def tell(self):
self.check_valid()
return self.space.newint(self.mmap.tell())
def descr_size(self):
self.check_valid()
try:
return self.space.newint(self.mmap.file_size())
except OSError as e:
raise mmap_error(self.space, e)
def write(self, w_data):
self.check_valid()
data = self.space.charbuf_w(w_data)
self.check_writeable()
try:
self.mmap.write(data)
except RValueError as v:
raise mmap_error(self.space, v)
@unwrap_spec(byte=int)
def write_byte(self, byte):
self.check_valid()
self.check_writeable()
try:
self.mmap.write_byte(chr(byte))
except RMMapError as v:
raise mmap_error(self.space, v)
@unwrap_spec(offset=int, size=int)
def flush(self, offset=0, size=0):
self.check_valid()
try:
return self.space.newint(self.mmap.flush(offset, size))
except RValueError as v:
raise mmap_error(self.space, v)
except OSError as e:
raise mmap_error(self.space, e)
@unwrap_spec(dest=int, src=int, count=int)
def move(self, dest, src, count):
self.check_valid()
self.check_writeable()
try:
self.mmap.move(dest, src, count)
except RValueError as v:
raise mmap_error(self.space, v)
@unwrap_spec(newsize=int)
def resize(self, newsize):
self.check_valid()
self.check_resizeable()
try:
self.mmap.resize(newsize)
except OSError as e:
raise mmap_error(self.space, e)
except RValueError as e:
# obscure: in this case, RValueError translates to an app-level
# SystemError.
raise OperationError(self.space.w_SystemError,
self.space.newtext(e.message))
def __len__(self):
return self.space.newint(self.mmap.size)
def closed_get(self, space):
try:
self.mmap.check_valid()
except RValueError:
return space.w_True
return space.w_False
def check_valid(self):
try:
self.mmap.check_valid()
except RValueError as v:
raise mmap_error(self.space, v)
def check_writeable(self):
try:
self.mmap.check_writeable()
except RMMapError as v:
raise mmap_error(self.space, v)
def check_resizeable(self):
try:
self.mmap.check_resizeable()
except RMMapError as v:
raise mmap_error(self.space, v)
def descr_getitem(self, w_index):
self.check_valid()
space = self.space
start, stop, step, length = space.decode_index4(w_index, self.mmap.size)
if step == 0: # index only
return space.newint(ord(self.mmap.getitem(start)))
elif step == 1:
if stop - start < 0:
return space.newbytes("")
return space.newbytes(self.mmap.getslice(start, length))
else:
b = StringBuilder(length)
for i in range(start, stop, step):
b.append(self.mmap.getitem(i))
return space.newbytes(b.build())
def descr_setitem(self, w_index, w_value):
space = self.space
self.check_valid()
self.check_writeable()
start, stop, step, length = space.decode_index4(w_index, self.mmap.size)
if step == 0: # index only
value = space.int_w(w_value)
if not 0 <= value < 256:
raise oefmt(space.w_ValueError,
"mmap item value must be in range(0, 256)")
self.mmap.setitem(start, chr(value))
else:
value = space.bytes_w(w_value)
if len(value) != length:
raise oefmt(space.w_ValueError,
"mmap slice assignment is wrong size")
if step == 1:
self.mmap.setslice(start, value)
else:
for i in range(length):
self.mmap.setitem(start, value[i])
start += step
def descr_enter(self, space):
self.check_valid()
return self
def descr_exit(self, space, __args__):
self.close()
if rmmap._POSIX:
@unwrap_spec(fileno=int, length=int, flags=int,
prot=int, access=int, offset=OFF_T)
def mmap(space, w_subtype, fileno, length, flags=rmmap.MAP_SHARED,
prot=rmmap.PROT_WRITE | rmmap.PROT_READ,
access=rmmap._ACCESS_DEFAULT, offset=0):
self = space.allocate_instance(W_MMap, w_subtype)
try:
W_MMap.__init__(self, space,
rmmap.mmap(fileno, length, flags, prot, access,
offset))
except OSError as e:
raise mmap_error(space, e)
except RMMapError as e:
raise mmap_error(space, e)
return self
elif rmmap._MS_WINDOWS:
@unwrap_spec(fileno=int, length=int, tagname='text',
access=int, offset=OFF_T)
def mmap(space, w_subtype, fileno, length, tagname="",
access=rmmap._ACCESS_DEFAULT, offset=0):
self = space.allocate_instance(W_MMap, w_subtype)
try:
W_MMap.__init__(self, space,
rmmap.mmap(fileno, length, tagname, access,
offset))
except OSError as e:
raise mmap_error(space, e)
except RMMapError as e:
raise mmap_error(space, e)
return self
W_MMap.typedef = TypeDef("mmap.mmap", None, None, 'read-write',
__new__ = interp2app(mmap),
close = interp2app(W_MMap.close),
read_byte = interp2app(W_MMap.read_byte),
readline = interp2app(W_MMap.readline),
read = interp2app(W_MMap.read),
find = interp2app(W_MMap.find),
rfind = interp2app(W_MMap.rfind),
seek = interp2app(W_MMap.seek),
tell = interp2app(W_MMap.tell),
size = interp2app(W_MMap.descr_size),
write = interp2app(W_MMap.write),
write_byte = interp2app(W_MMap.write_byte),
flush = interp2app(W_MMap.flush),
move = interp2app(W_MMap.move),
resize = interp2app(W_MMap.resize),
__len__ = interp2app(W_MMap.__len__),
__getitem__ = interp2app(W_MMap.descr_getitem),
__setitem__ = interp2app(W_MMap.descr_setitem),
__enter__ = interp2app(W_MMap.descr_enter),
__exit__ = interp2app(W_MMap.descr_exit),
__weakref__ = make_weakref_descr(W_MMap),
closed = GetSetProperty(W_MMap.closed_get),
)
constants = rmmap.constants
PAGESIZE = rmmap.PAGESIZE
ALLOCATIONGRANULARITY = rmmap.ALLOCATIONGRANULARITY
ACCESS_READ = rmmap.ACCESS_READ
ACCESS_WRITE = rmmap.ACCESS_WRITE
ACCESS_COPY = rmmap.ACCESS_COPY
@objectmodel.dont_inline
def mmap_error(space, e):
if isinstance(e, RValueError):
return OperationError(space.w_ValueError, space.newtext(e.message))
elif isinstance(e, RTypeError):
return OperationError(space.w_TypeError, space.newtext(e.message))
elif isinstance(e, OSError):
return wrap_oserror(space, e)
else:
# bogus 'e'?
return OperationError(space.w_SystemError, space.newtext('%s' % e))
class MMapBuffer(RawBuffer):
_immutable_ = True
def __init__(self, space, mmap, readonly):
self.space = space
self.mmap = mmap
self.readonly = readonly
def getlength(self):
return self.mmap.size
def getitem(self, index):
self.check_valid()
return self.mmap.data[index]
def getslice(self, start, stop, step, size):
self.check_valid()
if step == 1:
return self.mmap.getslice(start, size)
else:
return RawBuffer.getslice(self, start, stop, step, size)
def setitem(self, index, char):
self.check_valid_writeable()
self.mmap.data[index] = char
def setslice(self, start, string):
self.check_valid_writeable()
self.mmap.setslice(start, string)
def get_raw_address(self):
self.check_valid()
return self.mmap.data
def check_valid(self):
try:
self.mmap.check_valid()
except RValueError as v:
raise mmap_error(self.space, v)
def check_valid_writeable(self):
try:
self.mmap.check_valid()
self.mmap.check_writeable()
except RMMapError as v:
raise mmap_error(self.space, v)
|
