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69 lines
5.0 KiB
Plaintext
69 lines
5.0 KiB
Plaintext
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<03>
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<EFBFBD>W`Sc @ s5 d Z d d l Z d d l Z d d d <00> <00> YZ d S( s<>
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File-like objects that read from or write to a bsddb record.
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This implements (nearly) all stdio methods.
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f = DBRecIO(db, key, txn=None)
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f.close() # explicitly release resources held
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flag = f.isatty() # always false
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pos = f.tell() # get current position
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f.seek(pos) # set current position
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f.seek(pos, mode) # mode 0: absolute; 1: relative; 2: relative to EOF
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buf = f.read() # read until EOF
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buf = f.read(n) # read up to n bytes
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f.truncate([size]) # truncate file at to at most size (default: current pos)
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f.write(buf) # write at current position
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f.writelines(list) # for line in list: f.write(line)
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Notes:
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- fileno() is left unimplemented so that code which uses it triggers
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an exception early.
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- There's a simple test set (see end of this file) - not yet updated
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for DBRecIO.
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- readline() is not implemented yet.
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From:
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Itamar Shtull-Trauring <itamar@maxnm.com>
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i<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Nt DBRecIOc B st e Z d
d <00> Z d <00> Z d <00> Z d d <00> Z d <00> Z d d <00> Z d Z d
d <00> Z
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d
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<00> Z d <00> Z d <00> Z
RS( c C sC | | _ | | _ | | _ d | _ d | _ d | _ d | _ d S( Ni ( t dbt keyt txnt Nonet lent post closedt softspace( t selfR R R ( ( s .\Lib\bsddb\dbrecio.pyt __init__# s c C s% | j s! d | _ | ` | ` n d S( Ni ( R R R ( R ( ( s .\Lib\bsddb\dbrecio.pyt close, s c C s | j r t d <00> n d S( Ns I/O operation on closed filei ( R t
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ValueError( R ( ( s .\Lib\bsddb\dbrecio.pyt isatty1 s i c C sc | j r t d <00> n | d k r1 | | j } n | d k rM | | j } n t d | <00> | _ d S( Ns I/O operation on closed filei i i ( R R R R t max( R R t mode( ( s .\Lib\bsddb\dbrecio.pyt seek6 s c C s | j r t d <00> n | j S( Ns I/O operation on closed file( R R R ( R ( ( s .\Lib\bsddb\dbrecio.pyt tell? s i<><69><EFBFBD><EFBFBD>c C s<> | j r t d <00> n | d k r- | j } n t | j | | j <00> } | | j } | j j | j d | j d | d | j <00>} | | _ | S( Ns I/O operation on closed filei R t dlent doff( R R R t minR R t getR R ( R t nt newposR t r( ( s .\Lib\bsddb\dbrecio.pyt readD s
- s|
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def readline(self, length=None):
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if self.closed:
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raise ValueError, "I/O operation on closed file"
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if self.buflist:
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self.buf = self.buf + string.joinfields(self.buflist, '')
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self.buflist = []
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i = string.find(self.buf, '
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', self.pos)
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if i < 0:
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newpos = self.len
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else:
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newpos = i+1
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if length is not None:
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if self.pos + length < newpos:
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newpos = self.pos + length
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r = self.buf[self.pos:newpos]
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self.pos = newpos
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return r
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def readlines(self, sizehint = 0):
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total = 0
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lines = []
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line = self.readline()
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while line:
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lines.append(line)
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total += len(line)
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if 0 < sizehint <= total:
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break
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line = self.readline()
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return lines
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c C s<> | j r t d <00> n | d k r- | j } n< | d k rN t t j d <00> <00> n | | j k ri | | _ n | j j | j d d | j
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d | j | d | <00>d S( Ns I/O operation on closed filei s Negative size not allowedt R R R ( R R R R t IOErrort errnot EINVALR t putR R R ( R t size( ( s .\Lib\bsddb\dbrecio.pyt truncater s c C s<> | j r t d <00> n | s d S| j | j k r^ | j j d | j | j <14> | j | _ n | j t | <00> } | j j | j | d | j d t | <00> d | j <00>| | _ d S( Ns I/O operation on closed filet R R R (
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R R R R t buflistt appendR R R R ( R t sR ( ( s .\Lib\bsddb\dbrecio.pyt write~ s 4c C s | j t j | d <00> <00> d S( NR ( R% t stringt
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joinfields( R t list( ( s .\Lib\bsddb\dbrecio.pyt
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writelines<65> s c C s | j r t d <00> n d S( Ns I/O operation on closed file( R R ( R ( ( s .\Lib\bsddb\dbrecio.pyt flush<73> s N( t __name__t
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__module__R R
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R R
R R R t _DBRecIO__fixmeR R% R) R* ( ( ( s .\Lib\bsddb\dbrecio.pyR " s , ( ( t __doc__R R& R ( ( ( s .\Lib\bsddb\dbrecio.pyt <module> s <13>
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