File manager

�
�V~gc@s5dZd
dl
Z
d
dlZddd��YZdS(s�
File-like objects that read from or write to a bsddb record.

This implements (nearly) all stdio methods.

f = DBRecIO(db, key, txn=None)
f.close()           # explicitly release resources held
flag = f.isatty()   # always false
pos = f.tell()      # get current position
f.seek(pos)         # set current position
f.seek(pos, mode)   # mode 0: absolute; 1: relative; 2: relative to EOF
buf = f.read()      # read until EOF
buf = f.read(n)     # read up to n bytes
f.truncate([size])  # truncate file at to at most size (default: current pos)
f.write(buf)        # write at current position
f.writelines(list)  # for line in list: f.write(line)

Notes:
- fileno() is left unimplemented so that code which uses it triggers
  an exception early.
- There's a simple test set (see end of this file) - not yet updated
  for DBRecIO.
- readline() is not implemented yet.


From:
    Itamar Shtull-Trauring <[email protected]>
i����NtDBRecIOcBsteZ
d
d�
Zd
�Zd�Zdd�
Zd�Zdd�
ZdZ	d
d	�
Z
d
�Zd�Zd�Z
RS(cCsC|
|_||_
||_d|_d
|_d
|_d
|_dS(Ni(tdbtkeyttxntNonetlentpostclosedt	softspace(tselfR
RR((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pyt__init__#s
	
	
	
	
	
	
c

Cs%|js!d
|_|`
|`ndS(Ni
(RR
R(
R	((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pytclose,s
	
	
c

Cs|jrt
d
�ndS(NsI/O operation on closed filei(Rt
ValueError(
R	((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pytisatty1s
	

icCsc|jrt
d
�n|dkr1|
|j}
n|dkrM|
|j}
ntd|
�|_dS(NsI/O operation on closed filei
ii(RRRRtmax(R	Rtmode((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pytseek6s
	





c

Cs|jrt
d
�n|jS(NsI/O operation on closed file(RRR(
R	((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pyttell?s
	

i����cCs�|jrt
d
�n|
dkr-|j}nt|j|
|j�}||j}|jj|jd|jd|d|j�
}||_|S(NsI/O operation on closed fileiRtdlentdoff(	RRRtminRR
tgetRR(R	t
ntnewposRt
r((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pytreadDs
	



-
	
s|
    def readline(self, length=None):
        if self.closed:
            raise ValueError, "I/O operation on closed file"
        if self.buflist:
            self.buf = self.buf + string.joinfields(self.buflist, '')
            self.buflist = []
        i = string.find(self.buf, '
', self.pos)
        if i < 0:
            newpos = self.len
        else:
            newpos = i+1
        if length is not None:
            if self.pos + length < newpos:
                newpos = self.pos + length
        r = self.buf[self.pos:newpos]
        self.pos = newpos
        return r

    def readlines(self, sizehint = 0):
        total = 0
        lines = []
        line = self.readline()
        while line:
            lines.append(line)
            total += len(line)
            if 0 < sizehint <= total:
                break
            line = self.readline()
        return lines
    c	Cs�|jrt
d
�n|
dkr-|j}
n<|
dkrNttjd��
n|
|jkri|
|_n|jj|j	dd|j
d|j|
d|
�
dS(NsI/O operation on closed fileisNegative size not allowedtRRR(RRRRtIOErrorterrnotEINVALR
tputRRR(R	tsize((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pyttruncaters
	




	



c	Cs�|jrt
d
�n|
sdS|j|jkr^|jjd|j|j�

|j|_n|jt|
�
}|jj|j|
d|j	dt|
�
d|j�
||_dS(NsI/O operation on closed files
RRR(
RRRRtbuflisttappendR
RRR(R	t
sR((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pytwrite~s
	






4
cCs|jt
j|
d
��

dS(NR(R$tstringt
joinfields(R	tlist((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pyt
writelines�s
c

Cs|jrt
d
�ndS(NsI/O operation on closed file(RR(
R	((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pytflush�s
	
N(t__name__t
__module__RR
RR
RRRt_DBRecIO__fixmeR R$R(R)(((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pyR"s
					,		((t__doc__RR%R(((s2/opt/alt/python27/lib64/python2.7/bsddb/dbrecio.pyt<module>s
�